From: Michael Olbrich <m.olbrich@pengutronix.de>
To: ptxdist@pengutronix.de
Subject: Re: [ptxdist] [PATCH v4 1/2] Add libfaketime as a core component of ptxdist for patchin support
Date: Mon, 27 Aug 2018 18:27:15 +0200 [thread overview]
Message-ID: <20180827162715.yujjrkq5gews4q4e@pengutronix.de> (raw)
In-Reply-To: <1533311096-14315-1-git-send-email-jon@ringle.org>
On Fri, Aug 03, 2018 at 11:44:55AM -0400, jon@ringle.org wrote:
> From: Jon Ringle <jringle@gridpoint.com>
>
> libfaketime will be used during patchin so that committer timestamps always
> have a fixed value and therefore making the ${PKG}_SERIES_SHA256 value
> repeatable
>
> The minimal set of source files was picked out of libfaketime-0.9.7
I think it should be possible to provide the correct timestamps with
GIT_AUTHOR_DATE and/or GIT_COMMITTER_DATE or something like that.
Michael
>
> Signed-off-by: Jon Ringle <jringle@gridpoint.com>
> ---
> Makefile.in | 14 +-
> scripts/libfaketime/Makefile | 118 ++
> scripts/libfaketime/faketime.c | 385 ++++++
> scripts/libfaketime/faketime_common.h | 61 +
> scripts/libfaketime/libfaketime.c | 2410 +++++++++++++++++++++++++++++++++
> scripts/libfaketime/libfaketime.map | 10 +
> scripts/libfaketime/time_ops.h | 104 ++
> 7 files changed, 3101 insertions(+), 1 deletion(-)
> create mode 100644 scripts/libfaketime/Makefile
> create mode 100644 scripts/libfaketime/faketime.c
> create mode 100644 scripts/libfaketime/faketime_common.h
> create mode 100644 scripts/libfaketime/libfaketime.c
> create mode 100644 scripts/libfaketime/libfaketime.map
> create mode 100644 scripts/libfaketime/time_ops.h
>
> diff --git a/Makefile.in b/Makefile.in
> index 40c676c..6e08377 100644
> --- a/Makefile.in
> +++ b/Makefile.in
> @@ -22,7 +22,7 @@ export SHELL
>
> @BUILD_NCONF_TRUE@NCONF = nconf
>
> -all: kconfig environment
> +all: kconfig libfaketime environment
> @touch .done
>
> kconfig:
> @@ -41,6 +41,17 @@ kconfig:
> conf mconf $(NCONF)
> @echo "done."
>
> +libfaketime:
> + @echo "building libfaketime ..."
> + @CC="$(CC)" \
> + CXX="$(CXX)" \
> + CFLAGS="$(CFLAGS)" \
> + CXXFLAGS="$(CXXFLAGS)" \
> + CPPFLAGS="$(CPPFLAGS)" \
> + LDFLAGS="$(LDFLAGS)" \
> + $(MAKE) -C "$(abs_srcdir)/scripts/libfaketime" all
> + @echo "done."
> +
> environment:
> @echo -n "preparing PTXdist environment ..."
> @ln -sf @AWK@ "$(abs_srcdir)/bin/awk"
> @@ -89,6 +100,7 @@ clean:
> @rm -f .done
> @find "$(abs_srcdir)/bin" -type l -print0 | xargs -0 rm -f
> @$(MAKE) -C "$(abs_srcdir)/scripts/kconfig" clean
> + @$(MAKE) -C "$(abs_srcdir)/scripts/libfaketime" clean
>
> dirty-check:
> @case "$(version)" in \
> diff --git a/scripts/libfaketime/Makefile b/scripts/libfaketime/Makefile
> new file mode 100644
> index 0000000..a557c38
> --- /dev/null
> +++ b/scripts/libfaketime/Makefile
> @@ -0,0 +1,118 @@
> +#
> +# Notes:
> +#
> +# * Compilation Defines:
> +#
> +# FAKE_STAT
> +# - Enables time faking also for files' timestamps.
> +#
> +# NO_ATFILE
> +# - Disables support for the fstatat() group of functions
> +#
> +# PTHREAD
> +# - Define this to enable multithreading support.
> +#
> +# PTHREAD_SINGLETHREADED_TIME
> +# - Define this if you want to single-thread time() ... there ARE
> +# possibile caching side-effects in a multithreaded environment
> +# without this, but the performance impact may require you to
> +# try it unsynchronized.
> +#
> +# FAKE_INTERNAL_CALLS
> +# - Also intercept libc internal __functions, e.g. not just time(),
> +# but also __time(). Enhances compatibility with applications
> +# that make use of low-level system calls, such as Java Virtual
> +# Machines.
> +#
> +# FAKE_SLEEP
> +# - Also intercept sleep(), nanosleep(), usleep(), alarm(), [p]poll()
> +#
> +# FAKE_TIMERS
> +# - Also intercept timer_settime() and timer_gettime()
> +#
> +# MULTI_ARCH
> +# - If MULTI_ARCH is set, the faketime wrapper program will put a literal
> +# $LIB into the LD_PRELOAD environment variable it creates, which makes
> +# ld automatically choose the correct library version to use for the
> +# target binary. Use for Linux platforms with Multi-Arch support only!
> +#
> +# * Compilation addition: second libMT target added for building the pthread-
> +# enabled library as a separate library
> +#
> +# * Compilation switch change: previous versions compiled using '-nostartfiles'
> +# This is no longer the case since there is a 'startup' constructor for the library
> +# which is used to activate the start-at times when specified. This also initializes
> +# the dynamic disabling of the FAKE_STAT calls.
> +#
> +# By default, libfaketime will be compiled for your system's default architecture.
> +# To build 32-bit libraries and binaries, add -m32 to CFLAGS and LDFLAGS.
> +#
> +# Change PREFIX to where you want libfaketime (libraries and wrapper binary) installed.
> +# LIBDIRNAME is relative to PREFIX. The default is to install into $PREFIX/lib/faketime,
> +# but you can set LIBDIRNAME to, e.g., /lib64 if you want to install it elsewhere.
> +# LIBDIRNAME has been introduced to support MultiLib systems. Please do not change the
> +# default value on MultiArch systems.
> +#
> +# For testing in the current directory without installation, try make PREFIX= LIBDIRNAME='.'
> +
> +CC ?= gcc
> +INSTALL ?= install
> +
> +PREFIX ?= /usr/local
> +LIBDIRNAME ?= /lib/faketime
> +PLATFORM ?=$(shell uname)
> +
> +CFLAGS += -std=gnu99 -Wall -Wextra -Werror -Wno-nonnull-compare -DFAKE_STAT -DFAKE_SLEEP -DFAKE_TIMERS -DFAKE_INTERNAL_CALLS -fPIC -DPREFIX='"'$(PREFIX)'"' -DLIBDIRNAME='"'$(LIBDIRNAME)'"'
> +ifeq ($(PLATFORM),SunOS)
> +CFLAGS += -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
> +endif
> +
> +LIB_LDFLAGS += -shared
> +
> +LDFLAGS += -lpthread
> +ifneq ($(PLATFORM),SunOS)
> +LDFLAGS += -Wl,--version-script=libfaketime.map
> +endif
> +
> +LDADD += -ldl -lm -lrt
> +BIN_LDFLAGS += -lrt
> +
> +SRC = libfaketime.c
> +LIBS_OBJ = libfaketime.o libfaketimeMT.o
> +BINS = faketime
> +
> +SONAME = 1
> +LIBS = libfaketime.so.${SONAME} libfaketimeMT.so.${SONAME}
> +
> +all: ${LIBS} ${BINS}
> +
> +libfaketimeMT.o: EXTRA_FLAGS := -DPTHREAD -DPTHREAD_SINGLETHREADED_TIME
> +
> +${LIBS_OBJ}: libfaketime.c
> + ${CC} -o $@ -c ${CFLAGS} ${EXTRA_FLAGS} $<
> +
> +%.so.${SONAME}: %.o libfaketime.map
> + ${CC} -o $@ -Wl,-soname,$@ ${LDFLAGS} ${LIB_LDFLAGS} $< ${LDADD}
> +
> +${BINS}: faketime.c
> + ${CC} -o $@ ${CFLAGS} ${EXTRA_FLAGS} $< ${LDFLAGS} ${BIN_LDFLAGS}
> +
> +clean:
> + @rm -f ${LIBS_OBJ} ${LIBS} ${BINS}
> +
> +distclean: clean
> + @echo
> +
> +install: ${LIBS} ${BINS}
> + @echo
> + @echo "Copying the faketime libraries to ${DESTDIR}${PREFIX}${LIBDIRNAME} and the faketime wrapper script to ${DESTDIR}${PREFIX}/bin ..."
> + $(INSTALL) -dm0755 "${DESTDIR}${PREFIX}${LIBDIRNAME}/"
> + $(INSTALL) -m0644 ${LIBS} "${DESTDIR}${PREFIX}${LIBDIRNAME}/"
> + $(INSTALL) -Dm0755 faketime "${DESTDIR}${PREFIX}/bin/faketime"
> +
> +uninstall:
> + for f in ${LIBS}; do rm -f "${DESTDIR}${PREFIX}${LIBDIRNAME}/$$f"; done
> + rmdir "${DESTDIR}${PREFIX}${LIBDIRNAME}"
> + rm -f "${DESTDIR}${PREFIX}/bin/faketime"
> +
> +.PHONY: all clean distclean install uninstall
> diff --git a/scripts/libfaketime/faketime.c b/scripts/libfaketime/faketime.c
> new file mode 100644
> index 0000000..138ebbd
> --- /dev/null
> +++ b/scripts/libfaketime/faketime.c
> @@ -0,0 +1,385 @@
> +/*
> + * libfaketime wrapper command
> + *
> + * This file is part of libfaketime, version 0.9.7
> + *
> + * libfaketime is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License v2 as published by the
> + * Free Software Foundation.
> + *
> + * libfaketime is distributed in the hope that it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License v2 along
> + * with the libfaketime; if not, write to the Free Software Foundation,
> + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + *
> + * Converted from shell script by Balint Reczey with the following credits
> + * and comments:
> + *
> + * Thanks to Daniel Kahn Gillmor for improvement suggestions.
> +
> + * This wrapper exposes only a small subset of the libfaketime functionality.
> + * Please see libfaketime's README file and man page for more details.
> +
> + * Acknowledgment: Parts of the functionality of this wrapper have been
> + * inspired by Matthias Urlichs' datefudge 1.14.
> +
> + * Compile time configuration: Path where the libfaketime libraries can be found
> + * on Linux/UNIX
> + *
> + */
> +
> +#include <stdio.h>
> +#include <unistd.h>
> +#include <stdlib.h>
> +#include <stdbool.h>
> +#include <stdint.h>
> +#include <string.h>
> +#include <time.h>
> +#include <fcntl.h>
> +#include <sys/stat.h>
> +#include <sys/types.h>
> +#include <sys/wait.h>
> +#include <sys/mman.h>
> +#include <semaphore.h>
> +
> +#include "faketime_common.h"
> +
> +const char version[] = "0.9.7";
> +
> +#ifdef __APPLE__
> +static const char *date_cmd = "gdate";
> +#else
> +static const char *date_cmd = "date";
> +#endif
> +
> +#define PATH_BUFSIZE 4096
> +
> +/* semaphore and shared memory names */
> +char sem_name[PATH_BUFSIZE] = {0}, shm_name[PATH_BUFSIZE] = {0};
> +
> +void usage(const char *name)
> +{
> + printf("\n"
> + "Usage: %s [switches] <timestamp> <program with arguments>\n"
> + "\n"
> + "This will run the specified 'program' with the given 'arguments'.\n"
> + "The program will be tricked into seeing the given 'timestamp' as its starting date and time.\n"
> + "The clock will continue to run from this timestamp. Please see the manpage (man faketime)\n"
> + "for advanced options, such as stopping the wall clock and make it run faster or slower.\n"
> + "\n"
> + "The optional switches are:\n"
> + " -m : Use the multi-threaded version of libfaketime\n"
> + " -f : Use the advanced timestamp specification format (see manpage)\n"
> + " --exclude-monotonic : Prevent monotonic clock from drifting (not the raw monotonic one)\n"
> + "\n"
> + "Examples:\n"
> + "%s 'last friday 5 pm' /bin/date\n"
> + "%s '2008-12-24 08:15:42' /bin/date\n"
> + "%s -f '+2,5y x10,0' /bin/bash -c 'date; while true; do echo $SECONDS ; sleep 1 ; done'\n"
> + "%s -f '+2,5y x0,50' /bin/bash -c 'date; while true; do echo $SECONDS ; sleep 1 ; done'\n"
> + "%s -f '+2,5y i2,0' /bin/bash -c 'date; while true; do date; sleep 1 ; done'\n"
> + "In this single case all spawned processes will use the same global clock\n"
> + "without restarting it at the start of each process.\n\n"
> + "(Please note that it depends on your locale settings whether . or , has to be used for fractions)\n"
> + "\n", name, name, name, name, name, name);
> +}
> +
> +/** Clean up shared objects */
> +static void cleanup_shobjs()
> +{
> + if (-1 == sem_unlink(sem_name))
> + {
> + perror("sem_unlink");
> + }
> + if (-1 == shm_unlink(shm_name))
> + {
> + perror("shm_unlink");
> + }
> +}
> +
> +int main (int argc, char **argv)
> +{
> + pid_t child_pid;
> + int curr_opt = 1;
> + bool use_mt = false, use_direct = false;
> + long offset;
> +
> + while(curr_opt < argc)
> + {
> + if (0 == strcmp(argv[curr_opt], "-m"))
> + {
> + use_mt = true;
> + curr_opt++;
> + continue;
> + }
> + else if (0 == strcmp(argv[curr_opt], "-f"))
> + {
> + use_direct = true;
> + curr_opt++;
> + continue;
> + }
> + else if (0 == strcmp(argv[curr_opt], "--exclude-monotonic"))
> + {
> + setenv("DONT_FAKE_MONOTONIC", "1", true);
> + curr_opt++;
> + continue;
> + }
> + else if ((0 == strcmp(argv[curr_opt], "-v")) ||
> + (0 == strcmp(argv[curr_opt], "--version")))
> + {
> + printf("\n%s: Version %s\n"
> + "For usage information please use '%s --help'.\n",
> + argv[0], version, argv[0]);
> + exit(EXIT_SUCCESS);
> + }
> + else if ((0 == strcmp(argv[curr_opt], "-h")) ||
> + (0 == strcmp(argv[curr_opt], "-?")) ||
> + (0 == strcmp(argv[curr_opt], "--help")))
> + {
> + usage(argv[0]);
> + exit(EXIT_SUCCESS);
> + }
> + else
> + {
> + /* we parsed all options */
> + break;
> + }
> + }
> +
> + /* we need at least a timestamp string and a command to run */
> + if (argc - curr_opt < 2)
> + {
> + usage(argv[0]);
> + exit(EXIT_FAILURE);
> + }
> +
> + if (!use_direct)
> + {
> + // TODO get seconds
> + int pfds[2];
> + (void) (pipe(pfds) + 1);
> + int ret = EXIT_SUCCESS;
> +
> + if (0 == (child_pid = fork()))
> + {
> + close(1); /* close normal stdout */
> + (void) (dup(pfds[1]) + 1); /* make stdout same as pfds[1] */
> + close(pfds[0]); /* we don't need this */
> + if (EXIT_SUCCESS != execlp(date_cmd, date_cmd, "-d", argv[curr_opt], "+%s",(char *) NULL))
> + {
> + perror("Running (g)date failed");
> + exit(EXIT_FAILURE);
> + }
> + }
> + else
> + {
> + char buf[256] = {0}; /* e will have way less than 256 digits */
> + close(pfds[1]); /* we won't write to this */
> + (void) (read(pfds[0], buf, 256) + 1);
> + waitpid(child_pid, &ret, 0);
> + if (ret != EXIT_SUCCESS)
> + {
> + printf("Error: Timestamp to fake not recognized, please re-try with a "
> + "different timestamp.\n");
> + exit(EXIT_FAILURE);
> + }
> + offset = atol(buf) - time(NULL);
> + ret = snprintf(buf, sizeof(buf), "%s%ld", (offset >= 0)?"+":"", offset);
> + setenv("FAKETIME", buf, true);
> + close(pfds[0]); /* finished reading */
> + }
> + }
> + else
> + {
> + /* simply pass format string along */
> + setenv("FAKETIME", argv[curr_opt], true);
> + }
> + int keepalive_fds[2];
> + (void) (pipe(keepalive_fds) + 1);
> +
> + /* we just consumed the timestamp option */
> + curr_opt++;
> +
> + {
> + /* create semaphores and shared memory */
> + int shm_fd;
> + sem_t *sem;
> + struct ft_shared_s *ft_shared;
> + char shared_objs[PATH_BUFSIZE];
> +
> + /*
> + * Casting of getpid() return value to long needed to make GCC on SmartOS
> + * happy, since getpid's return value's type on SmartOS is long. Since
> + * getpid's return value's type is int on most other systems, and that
> + * sizeof(long) always >= sizeof(int), this works on all platforms without
> + * the need for crazy #ifdefs.
> + */
> + snprintf(sem_name, PATH_BUFSIZE -1 ,"/faketime_sem_%ld", (long)getpid());
> + snprintf(shm_name, PATH_BUFSIZE -1 ,"/faketime_shm_%ld", (long)getpid());
> +
> + if (SEM_FAILED == (sem = sem_open(sem_name, O_CREAT|O_EXCL, S_IWUSR|S_IRUSR, 1)))
> + {
> + perror("sem_open");
> + exit(EXIT_FAILURE);
> + }
> +
> + /* create shm */
> + if (-1 == (shm_fd = shm_open(shm_name, O_CREAT|O_EXCL|O_RDWR, S_IWUSR|S_IRUSR)))
> + {
> + perror("shm_open");
> + if (-1 == sem_unlink(argv[2]))
> + {
> + perror("sem_unlink");
> + }
> + exit(EXIT_FAILURE);
> + }
> +
> + /* set shm size */
> + if (-1 == ftruncate(shm_fd, sizeof(uint64_t)))
> + {
> + perror("ftruncate");
> + cleanup_shobjs();
> + exit(EXIT_FAILURE);
> + }
> +
> + /* map shm */
> + if (MAP_FAILED == (ft_shared = mmap(NULL, sizeof(struct ft_shared_s), PROT_READ|PROT_WRITE,
> + MAP_SHARED, shm_fd, 0)))
> + {
> + perror("mmap");
> + cleanup_shobjs();
> + exit(EXIT_FAILURE);
> + }
> +
> + if (sem_wait(sem) == -1)
> + {
> + perror("sem_wait");
> + cleanup_shobjs();
> + exit(EXIT_FAILURE);
> + }
> +
> + /* init elapsed time ticks to zero */
> + ft_shared->ticks = 0;
> + ft_shared->file_idx = 0;
> + ft_shared->start_time.real.tv_sec = 0;
> + ft_shared->start_time.real.tv_nsec = -1;
> + ft_shared->start_time.mon.tv_sec = 0;
> + ft_shared->start_time.mon.tv_nsec = -1;
> + ft_shared->start_time.mon_raw.tv_sec = 0;
> + ft_shared->start_time.mon_raw.tv_nsec = -1;
> +
> + if (-1 == munmap(ft_shared, (sizeof(struct ft_shared_s))))
> + {
> + perror("munmap");
> + cleanup_shobjs();
> + exit(EXIT_FAILURE);
> + }
> +
> + if (sem_post(sem) == -1)
> + {
> + perror("semop");
> + cleanup_shobjs();
> + exit(EXIT_FAILURE);
> + }
> +
> + snprintf(shared_objs, PATH_BUFSIZE, "%s %s", sem_name, shm_name);
> + setenv("FAKETIME_SHARED", shared_objs, true);
> + sem_close(sem);
> + }
> +
> + {
> + char *ftpl_path;
> +#ifdef __APPLE__
> + ftpl_path = PREFIX "/libfaketime.1.dylib";
> + FILE *check;
> + check = fopen(ftpl_path, "ro");
> + if (check == NULL)
> + {
> + ftpl_path = PREFIX "/lib/faketime/libfaketime.1.dylib";
> + }
> + else
> + {
> + fclose(check);
> + }
> + setenv("DYLD_INSERT_LIBRARIES", ftpl_path, true);
> + setenv("DYLD_FORCE_FLAT_NAMESPACE", "1", true);
> +#else
> + {
> + char *ld_preload_new, *ld_preload = getenv("LD_PRELOAD");
> + size_t len;
> + if (use_mt)
> + {
> + /*
> + * on MultiArch platforms, such as Debian, we put a literal $LIB into LD_PRELOAD.
> + */
> +#ifndef MULTI_ARCH
> + ftpl_path = PREFIX LIBDIRNAME "/libfaketimeMT.so.1";
> +#else
> + ftpl_path = PREFIX "/$LIB/faketime/libfaketimeMT.so.1";
> +#endif
> + }
> + else
> + {
> +#ifndef MULTI_ARCH
> + ftpl_path = PREFIX LIBDIRNAME "/libfaketime.so.1";
> +#else
> + ftpl_path = PREFIX "/$LIB/faketime/libfaketime.so.1";
> +#endif
> + }
> + len = ((ld_preload)?strlen(ld_preload) + 1: 0) + 1 + strlen(ftpl_path);
> + ld_preload_new = malloc(len);
> + snprintf(ld_preload_new, len ,"%s%s%s", (ld_preload)?ld_preload:"",
> + (ld_preload)?":":"", ftpl_path);
> + setenv("LD_PRELOAD", ld_preload_new, true);
> + free(ld_preload_new);
> + }
> +#endif
> + }
> +
> + /* run command and clean up shared objects */
> + if (0 == (child_pid = fork()))
> + {
> + close(keepalive_fds[0]); /* only parent needs to read this */
> + if (EXIT_SUCCESS != execvp(argv[curr_opt], &argv[curr_opt]))
> + {
> + perror("Running specified command failed");
> + exit(EXIT_FAILURE);
> + }
> + }
> + else
> + {
> + int ret;
> + char buf;
> + close(keepalive_fds[1]); /* only children need keep this open */
> + waitpid(child_pid, &ret, 0);
> + (void) (read(keepalive_fds[0], &buf, 1) + 1); /* reads 0B when all children exit */
> + cleanup_shobjs();
> + if (WIFSIGNALED(ret))
> + {
> + fprintf(stderr, "Caught %s\n", strsignal(WTERMSIG(ret)));
> + exit(EXIT_FAILURE);
> + }
> + exit(WEXITSTATUS(ret));
> + }
> +
> + return EXIT_SUCCESS;
> +}
> +
> +/*
> + * Editor modelines
> + *
> + * Local variables:
> + * c-basic-offset: 2
> + * tab-width: 2
> + * indent-tabs-mode: nil
> + * End:
> + *
> + * vi: set shiftwidth=2 tabstop=2 expandtab:
> + * :indentSize=2:tabSize=2:noTabs=true:
> + */
> +
> +/* eof */
> diff --git a/scripts/libfaketime/faketime_common.h b/scripts/libfaketime/faketime_common.h
> new file mode 100644
> index 0000000..9fda6a7
> --- /dev/null
> +++ b/scripts/libfaketime/faketime_common.h
> @@ -0,0 +1,61 @@
> +/*
> + * Faketime's common definitions
> + *
> + * Copyright 2013 Balint Reczey <balint@balintreczey.hu>
> + *
> + * This file is part of the libfaketime.
> + *
> + * libfaketime is free software; you can redistribute it and/or modify it under
> + * the terms of the GNU General Public License v2 as published by the Free
> + * Software Foundation.
> + *
> + * libfaketime is distributed in the hope that it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License v2 along
> + * with libfaketime; if not, write to the Free Software Foundation, Inc.,
> + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + */
> +
> +#ifndef FAKETIME_COMMON_H
> +#define FAKETIME_COMMON_H
> +
> +#include <stdint.h>
> +
> +struct system_time_s
> +{
> + /* System time according to CLOCK_REALTIME */
> + struct timespec real;
> + /* System time according to CLOCK_MONOTONIC */
> + struct timespec mon;
> + /* System time according to CLOCK_MONOTONIC_RAW */
> + struct timespec mon_raw;
> +#ifdef CLOCK_BOOTTIME
> + /* System time according to CLOCK_BOOTTIME */
> + struct timespec boot;
> +#endif
> +};
> +
> +/* Data shared among faketime-spawned processes */
> +struct ft_shared_s
> +{
> + /*
> + * When advancing time linearly with each time(), etc. call, the calls are
> + * counted here */
> + uint64_t ticks;
> + /* Index of timstamp to be loaded from file */
> + uint64_t file_idx;
> + /* System time Faketime started at */
> + struct system_time_s start_time;
> +};
> +
> +/* These are all needed in order to properly build on OSX */
> +#ifdef __APPLE__
> +#include <mach/clock.h>
> +#include <mach/mach_host.h>
> +#include <mach/mach_port.h>
> +#endif
> +
> +#endif
> diff --git a/scripts/libfaketime/libfaketime.c b/scripts/libfaketime/libfaketime.c
> new file mode 100644
> index 0000000..eb2d01b
> --- /dev/null
> +++ b/scripts/libfaketime/libfaketime.c
> @@ -0,0 +1,2410 @@
> +/*
> + * This file is part of libfaketime, version 0.9.7
> + *
> + * libfaketime is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License v2 as published by the
> + * Free Software Foundation.
> + *
> + * libfaketime is distributed in the hope that it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License v2 along
> + * with the libfaketime; if not, write to the Free Software Foundation,
> + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + */
> +
> +/*
> + * =======================================================================
> + * Global settings, includes, and macros === HEAD
> + * =======================================================================
> + */
> +
> +#define _GNU_SOURCE /* required to get RTLD_NEXT defined */
> +
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <stdint.h>
> +#include <stdbool.h>
> +#include <unistd.h>
> +#include <fcntl.h>
> +#include <poll.h>
> +#include <time.h>
> +#include <math.h>
> +#include <errno.h>
> +#include <string.h>
> +#include <semaphore.h>
> +#include <sys/mman.h>
> +#include <sys/stat.h>
> +#include <sys/types.h>
> +#include <netinet/in.h>
> +#include <limits.h>
> +
> +#include "time_ops.h"
> +#include "faketime_common.h"
> +
> +/* pthread-handling contributed by David North, TDI in version 0.7 */
> +#ifdef PTHREAD
> +#include <pthread.h>
> +#endif
> +
> +#include <sys/timeb.h>
> +#include <dlfcn.h>
> +
> +#define BUFFERLEN 256
> +
> +#ifndef __APPLE__
> +extern char *__progname;
> +#ifdef __sun
> +#include "sunos_endian.h"
> +#else
> +#include <endian.h>
> +#endif
> +#else
> +/* endianness related macros */
> +#ifndef OSSwapHostToBigInt64
> +#define OSSwapHostToBigInt64(x) ((uint64_t)(x))
> +#endif
> +#define htobe64(x) OSSwapHostToBigInt64(x)
> +#ifndef OSSwapHostToLittleInt64
> +#define OSSwapHostToLittleInt64(x) OSSwapInt64(x)
> +#endif
> +#define htole64(x) OSSwapHostToLittleInt64(x)
> +#ifndef OSSwapBigToHostInt64
> +#define OSSwapBigToHostInt64(x) ((uint64_t)(x))
> +#endif
> +#define be64toh(x) OSSwapBigToHostInt64(x)
> +#ifndef OSSwapLittleToHostInt64
> +#define OSSwapLittleToHostInt64(x) OSSwapInt64(x)
> +#endif
> +#define le64toh(x) OSSwapLittleToHostInt64(x)
> +
> +/* clock_gettime() and related clock definitions are missing on __APPLE__ */
> +#ifndef CLOCK_REALTIME
> +/* from GNU C Library time.h */
> +/* Identifier for system-wide realtime clock. ( == 1) */
> +#define CLOCK_REALTIME CALENDAR_CLOCK
> +/* Monotonic system-wide clock. (== 0) */
> +#define CLOCK_MONOTONIC SYSTEM_CLOCK
> +/* High-resolution timer from the CPU. */
> +#define CLOCK_PROCESS_CPUTIME_ID 2
> +/* Thread-specific CPU-time clock. */
> +#define CLOCK_THREAD_CPUTIME_ID 3
> +/* Monotonic system-wide clock, not adjusted for frequency scaling. */
> +#define CLOCK_MONOTONIC_RAW 4
> +typedef int clockid_t;
> +#include <mach/clock.h>
> +#include <mach/mach.h>
> +#endif
> +#endif
> +
> +/* some systems lack raw clock */
> +#ifndef CLOCK_MONOTONIC_RAW
> +#define CLOCK_MONOTONIC_RAW (CLOCK_MONOTONIC + 1)
> +#endif
> +
> +/*
> + * Per thread variable, which we turn on inside real_* calls to avoid modifying
> + * time multiple times of for the whole process to prevent faking time
> + */
> +static __thread bool dont_fake = false;
> +
> +/* Wrapper for function calls, which we want to return system time */
> +#define DONT_FAKE_TIME(call) \
> + { \
> + bool dont_fake_orig = dont_fake; \
> + if (!dont_fake) \
> + { \
> + dont_fake = true; \
> + } \
> + call; \
> + dont_fake = dont_fake_orig; \
> + } while (0)
> +
> +/* pointers to real (not faked) functions */
> +static int (*real_stat) (int, const char *, struct stat *);
> +static int (*real_fstat) (int, int, struct stat *);
> +static int (*real_fstatat) (int, int, const char *, struct stat *, int);
> +static int (*real_lstat) (int, const char *, struct stat *);
> +static int (*real_stat64) (int, const char *, struct stat64 *);
> +static int (*real_fstat64) (int, int , struct stat64 *);
> +static int (*real_fstatat64) (int, int , const char *, struct stat64 *, int);
> +static int (*real_lstat64) (int, const char *, struct stat64 *);
> +static time_t (*real_time) (time_t *);
> +static int (*real_ftime) (struct timeb *);
> +static int (*real_gettimeofday) (struct timeval *, void *);
> +static int (*real_clock_gettime) (clockid_t clk_id, struct timespec *tp);
> +#ifdef FAKE_INTERNAL_CALLS
> +static int (*real___ftime) (struct timeb *);
> +static int (*real___gettimeofday) (struct timeval *, void *);
> +static int (*real___clock_gettime) (clockid_t clk_id, struct timespec *tp);
> +#endif
> +#ifndef __APPLEOSX__
> +#ifdef FAKE_TIMERS
> +static int (*real_timer_settime_22) (int timerid, int flags, const struct itimerspec *new_value,
> + struct itimerspec * old_value);
> +static int (*real_timer_settime_233) (timer_t timerid, int flags,
> + const struct itimerspec *new_value,
> + struct itimerspec * old_value);
> +static int (*real_timer_gettime_22) (int timerid,
> + struct itimerspec *curr_value);
> +static int (*real_timer_gettime_233) (timer_t timerid,
> + struct itimerspec *curr_value);
> +#endif
> +#endif
> +#ifdef FAKE_SLEEP
> +static int (*real_nanosleep) (const struct timespec *req, struct timespec *rem);
> +static int (*real_usleep) (useconds_t usec);
> +static unsigned int (*real_sleep) (unsigned int seconds);
> +static unsigned int (*real_alarm) (unsigned int seconds);
> +static int (*real_poll) (struct pollfd *, nfds_t, int);
> +static int (*real_ppoll) (struct pollfd *, nfds_t, const struct timespec *, const sigset_t *);
> +static int (*real_select) (int nfds, fd_set *restrict readfds,
> + fd_set *restrict writefds,
> + fd_set *restrict errorfds,
> + struct timeval *restrict timeout);
> +static int (*real_sem_timedwait) (sem_t*, const struct timespec*);
> +#endif
> +#ifdef __APPLEOSX__
> +static int (*real_clock_get_time) (clock_serv_t clock_serv, mach_timespec_t *cur_timeclockid_t);
> +static int apple_clock_gettime (clockid_t clk_id, struct timespec *tp);
> +static clock_serv_t clock_serv_real;
> +#endif
> +
> +static int initialized = 0;
> +
> +/* prototypes */
> +static int fake_gettimeofday(struct timeval *tv);
> +static int fake_clock_gettime(clockid_t clk_id, struct timespec *tp);
> +
> +/** Semaphore protecting shared data */
> +static sem_t *shared_sem = NULL;
> +
> +/** Data shared among faketime-spawned processes */
> +static struct ft_shared_s *ft_shared = NULL;
> +
> +/** Storage format for timestamps written to file. Big endian.*/
> +struct saved_timestamp
> +{
> + int64_t sec;
> + uint64_t nsec;
> +};
> +
> +static inline void timespec_from_saved (struct timespec *tp,
> + struct saved_timestamp *saved)
> +{
> + /* read as big endian */
> + tp->tv_sec = be64toh(saved->sec);
> + tp->tv_nsec = be64toh(saved->nsec);
> +}
> +
> +/** Saved timestamps */
> +static struct saved_timestamp *stss = NULL;
> +static size_t infile_size;
> +static bool infile_set = false;
> +
> +/** File fd to save timestamps to */
> +static int outfile = -1;
> +
> +static bool limited_faking = false;
> +static long callcounter = 0;
> +static long ft_start_after_secs = -1;
> +static long ft_stop_after_secs = -1;
> +static long ft_start_after_ncalls = -1;
> +static long ft_stop_after_ncalls = -1;
> +
> +static bool spawnsupport = false;
> +static int spawned = 0;
> +static char ft_spawn_target[1024];
> +static long ft_spawn_secs = -1;
> +static long ft_spawn_ncalls = -1;
> +
> +static int fake_monotonic_clock = 1;
> +static int cache_enabled = 1;
> +static int cache_duration = 10; /* cache fake time input for 10 seconds */
> +
> +/*
> + * Static timespec to store our startup time, followed by a load-time library
> + * initialization declaration.
> + */
> +#ifndef CLOCK_BOOTTIME
> +static struct system_time_s ftpl_starttime = {{0, -1}, {0, -1}, {0, -1}};
> +#else
> +static struct system_time_s ftpl_starttime = {{0, -1}, {0, -1}, {0, -1}, {0, -1}};
> +#endif
> +
> +static char user_faked_time_fmt[BUFSIZ] = {0};
> +
> +/* User supplied base time to fake */
> +static struct timespec user_faked_time_timespec = {0, -1};
> +/* User supplied base time is set */
> +static bool user_faked_time_set = false;
> +static char user_faked_time_saved[BUFFERLEN] = {0};
> +
> +/* Fractional user offset provided through FAKETIME env. var.*/
> +static struct timespec user_offset = {0, -1};
> +/* Speed up or slow down clock */
> +static double user_rate = 1.0;
> +static bool user_rate_set = false;
> +static struct timespec user_per_tick_inc = {0, -1};
> +static bool user_per_tick_inc_set = false;
> +
> +enum ft_mode_t {FT_FREEZE, FT_START_AT, FT_NOOP} ft_mode = FT_FREEZE;
> +
> +/* Time to fake is not provided through FAKETIME env. var. */
> +static bool parse_config_file = true;
> +
> +void ft_cleanup (void) __attribute__ ((destructor));
> +void ftpl_init (void) __attribute__ ((constructor));
> +
> +
> +/*
> + * =======================================================================
> + * Shared memory related functions === SHM
> + * =======================================================================
> + */
> +
> +static void ft_shm_init (void)
> +{
> + int ticks_shm_fd;
> + char sem_name[256], shm_name[256], *ft_shared_env = getenv("FAKETIME_SHARED");
> +
> + if (ft_shared_env != NULL)
> + {
> + if (sscanf(ft_shared_env, "%255s %255s", sem_name, shm_name) < 2)
> + {
> + printf("Error parsing semaphore name and shared memory id from string: %s", ft_shared_env);
> + exit(1);
> + }
> +
> + if (SEM_FAILED == (shared_sem = sem_open(sem_name, 0)))
> + {
> + perror("sem_open");
> + exit(1);
> + }
> +
> + if (-1 == (ticks_shm_fd = shm_open(shm_name, O_CREAT|O_RDWR, S_IWUSR|S_IRUSR)))
> + {
> + perror("shm_open");
> + exit(1);
> + }
> +
> + if (MAP_FAILED == (ft_shared = mmap(NULL, sizeof(struct ft_shared_s), PROT_READ|PROT_WRITE,
> + MAP_SHARED, ticks_shm_fd, 0)))
> + {
> + perror("mmap");
> + exit(1);
> + }
> + }
> +}
> +
> +void ft_cleanup (void)
> +{
> + /* detach from shared memory */
> + if (ft_shared != NULL)
> + {
> + munmap(ft_shared, sizeof(uint64_t));
> + }
> + if (stss != NULL)
> + {
> + munmap(stss, infile_size);
> + }
> + if (shared_sem != NULL)
> + {
> + sem_close(shared_sem);
> + }
> +}
> +
> +
> +/*
> + * =======================================================================
> + * Internal time retrieval === INTTIME
> + * =======================================================================
> + */
> +
> +/* Get system time from system for all clocks */
> +static void system_time_from_system (struct system_time_s * systime)
> +{
> +#ifdef __APPLEOSX__
> + /* from http://stackoverflow.com/questions/5167269/clock-gettime-alternative-in-mac-os-x */
> + clock_serv_t cclock;
> + mach_timespec_t mts;
> + host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &clock_serv_real);
> + (*real_clock_get_time)(clock_serv_real, &mts);
> + systime->real.tv_sec = mts.tv_sec;
> + systime->real.tv_nsec = mts.tv_nsec;
> + host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
> + (*real_clock_get_time)(cclock, &mts);
> + mach_port_deallocate(mach_task_self(), cclock);
> + systime->mon.tv_sec = mts.tv_sec;
> + systime->mon.tv_nsec = mts.tv_nsec;
> + systime->mon_raw.tv_sec = mts.tv_sec;
> + systime->mon_raw.tv_nsec = mts.tv_nsec;
> +#else
> + DONT_FAKE_TIME((*real_clock_gettime)(CLOCK_REALTIME, &systime->real))
> + ;
> + DONT_FAKE_TIME((*real_clock_gettime)(CLOCK_MONOTONIC, &systime->mon))
> + ;
> + DONT_FAKE_TIME((*real_clock_gettime)(CLOCK_MONOTONIC_RAW, &systime->mon_raw))
> + ;
> +#ifdef CLOCK_BOOTTIME
> + DONT_FAKE_TIME((*real_clock_gettime)(CLOCK_BOOTTIME, &systime->boot))
> + ;
> +#endif
> +#endif
> +}
> +
> +static void next_time(struct timespec *tp, struct timespec *ticklen)
> +{
> + if (shared_sem != NULL)
> + {
> + struct timespec inc;
> + /* lock */
> + if (sem_wait(shared_sem) == -1)
> + {
> + perror("sem_wait");
> + exit(1);
> + }
> + /* calculate and update elapsed time */
> + timespecmul(ticklen, ft_shared->ticks, &inc);
> + timespecadd(&user_faked_time_timespec, &inc, tp);
> + (ft_shared->ticks)++;
> + /* unlock */
> + if (sem_post(shared_sem) == -1)
> + {
> + perror("sem_post");
> + exit(1);
> + }
> + }
> +}
> +
> +
> +/*
> + * =======================================================================
> + * Saving & loading time === SAVE
> + * =======================================================================
> + */
> +
> +static void save_time(struct timespec *tp)
> +{
> + if ((shared_sem != NULL) && (outfile != -1))
> + {
> + struct saved_timestamp time_write;
> + ssize_t written;
> + size_t n = 0;
> +
> + time_write.sec = htobe64(tp->tv_sec);
> + time_write.nsec = htobe64(tp->tv_nsec);
> +
> + /* lock */
> + if (sem_wait(shared_sem) == -1)
> + {
> + perror("sem_wait");
> + exit(1);
> + }
> +
> + lseek(outfile, 0, SEEK_END);
> + do
> + {
> + written = write(outfile, &(((char*)&time_write)[n]), sizeof(time_write) - n);
> + }
> + while (((written == -1) && (errno == EINTR)) ||
> + (sizeof(time_write) < (n += written)));
> +
> + if ((written == -1) || (n < sizeof(time_write)))
> + {
> + perror("Saving timestamp to file failed");
> + }
> +
> + /* unlock */
> + if (sem_post(shared_sem) == -1)
> + {
> + perror("sem_post");
> + exit(1);
> + }
> + }
> +}
> +
> +/*
> + * Provide faked time from file.
> + * @return time is set from filen
> + */
> +static bool load_time(struct timespec *tp)
> +{
> + bool ret = false;
> + if ((shared_sem != NULL) && (infile_set))
> + {
> + /* lock */
> + if (sem_wait(shared_sem) == -1)
> + {
> + perror("sem_wait");
> + exit(1);
> + }
> +
> + if ((sizeof(stss[0]) * (ft_shared->file_idx + 1)) > infile_size)
> + {
> + /* we are out of timstamps to replay, return to faking time by rules
> + * using last timestamp from file as the user provided timestamp */
> + timespec_from_saved(&user_faked_time_timespec, &stss[(infile_size / sizeof(stss[0])) - 1 ]);
> +
> + if (ft_shared->ticks == 0)
> + {
> + /* we set shared memory to stop using infile */
> + ft_shared->ticks = 1;
> + system_time_from_system(&ftpl_starttime);
> + ft_shared->start_time = ftpl_starttime;
> + }
> + else
> + {
> + ftpl_starttime = ft_shared->start_time;
> + }
> +
> + munmap(stss, infile_size);
> + infile_set = false;
> + }
> + else
> + {
> + timespec_from_saved(tp, &stss[ft_shared->file_idx]);
> + ft_shared->file_idx++;
> + ret = true;
> + }
> +
> + /* unlock */
> + if (sem_post(shared_sem) == -1)
> + {
> + perror("sem_post");
> + exit(1);
> + }
> + }
> + return ret;
> +}
> +
> +
> +/*
> + * =======================================================================
> + * Faked system functions: file related === FAKE(FILE)
> + * =======================================================================
> + */
> +
> +#ifdef FAKE_STAT
> +
> +#ifndef NO_ATFILE
> +#ifndef _ATFILE_SOURCE
> +#define _ATFILE_SOURCE
> +#endif
> +#include <fcntl.h> /* Definition of AT_* constants */
> +#endif
> +
> +#include <sys/stat.h>
> +
> +static int fake_stat_disabled = 0;
> +
> +#define FAKE_STRUCT_STAT_TIME(which) { \
> + struct timespec t = {buf->st_##which##time, \
> + buf->st_##which##timensec}; \
> + fake_clock_gettime(CLOCK_REALTIME, &t); \
> + buf->st_##which##time = t.tv_sec; \
> + buf->st_##which##timensec = t.tv_nsec; \
> + } while (0)
> +
> +static inline void fake_statbuf (struct stat *buf) {
> +#ifndef st_atime
> + FAKE_STRUCT_STAT_TIME(c);
> + FAKE_STRUCT_STAT_TIME(a);
> + FAKE_STRUCT_STAT_TIME(m);
> +#else
> + fake_clock_gettime(CLOCK_REALTIME, &buf->st_ctim);
> + fake_clock_gettime(CLOCK_REALTIME, &buf->st_atim);
> + fake_clock_gettime(CLOCK_REALTIME, &buf->st_mtim);
> +#endif
> +}
> +
> +static inline void fake_stat64buf (struct stat64 *buf) {
> +#ifndef st_atime
> + FAKE_STRUCT_STAT_TIME(c);
> + FAKE_STRUCT_STAT_TIME(a);
> + FAKE_STRUCT_STAT_TIME(m);
> +#else
> + fake_clock_gettime(CLOCK_REALTIME, &buf->st_ctim);
> + fake_clock_gettime(CLOCK_REALTIME, &buf->st_atim);
> + fake_clock_gettime(CLOCK_REALTIME, &buf->st_mtim);
> +#endif
> +}
> +
> +/* Contributed by Philipp Hachtmann in version 0.6 */
> +int __xstat (int ver, const char *path, struct stat *buf)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (NULL == real_stat)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original stat() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + int result;
> + DONT_FAKE_TIME(result = real_stat(ver, path, buf));
> + if (result == -1)
> + {
> + return -1;
> + }
> +
> + if (buf != NULL)
> + {
> + if (!fake_stat_disabled)
> + {
> + fake_statbuf(buf);
> + }
> + }
> +
> + return result;
> +}
> +
> +/* Contributed by Philipp Hachtmann in version 0.6 */
> +int __fxstat (int ver, int fildes, struct stat *buf)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (NULL == real_fstat)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original fstat() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + int result;
> + DONT_FAKE_TIME(result = real_fstat(ver, fildes, buf));
> + if (result == -1)
> + {
> + return -1;
> + }
> +
> + if (buf != NULL)
> + {
> + if (!fake_stat_disabled)
> + {
> + fake_statbuf(buf);
> + }
> + }
> + return result;
> +}
> +
> +/* Added in v0.8 as suggested by Daniel Kahn Gillmor */
> +#ifndef NO_ATFILE
> +int __fxstatat(int ver, int fildes, const char *filename, struct stat *buf, int flag)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (NULL == real_fstatat)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original fstatat() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + int result;
> + DONT_FAKE_TIME(result = real_fstatat(ver, fildes, filename, buf, flag));
> + if (result == -1)
> + {
> + return -1;
> + }
> +
> + if (buf != NULL)
> + {
> + if (!fake_stat_disabled)
> + {
> + fake_statbuf(buf);
> + }
> + }
> + return result;
> +}
> +#endif
> +
> +/* Contributed by Philipp Hachtmann in version 0.6 */
> +int __lxstat (int ver, const char *path, struct stat *buf)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (NULL == real_lstat)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original lstat() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + int result;
> + DONT_FAKE_TIME(result = real_lstat(ver, path, buf));
> + if (result == -1)
> + {
> + return -1;
> + }
> +
> + if (buf != NULL)
> + {
> + if (!fake_stat_disabled)
> + {
> + fake_statbuf(buf);
> + }
> + }
> + return result;
> +}
> +
> +/* Contributed by Philipp Hachtmann in version 0.6 */
> +int __xstat64 (int ver, const char *path, struct stat64 *buf)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (NULL == real_stat64)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original stat() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + int result;
> + DONT_FAKE_TIME(result = real_stat64(ver, path, buf));
> + if (result == -1)
> + {
> + return -1;
> + }
> +
> + if (buf != NULL)
> + {
> + if (!fake_stat_disabled)
> + {
> + fake_stat64buf(buf);
> + }
> + }
> + return result;
> +}
> +
> +/* Contributed by Philipp Hachtmann in version 0.6 */
> +int __fxstat64 (int ver, int fildes, struct stat64 *buf)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (NULL == real_fstat64)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original fstat() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + int result;
> + DONT_FAKE_TIME(result = real_fstat64(ver, fildes, buf));
> + if (result == -1)
> + {
> + return -1;
> + }
> +
> + if (buf != NULL)
> + {
> + if (!fake_stat_disabled)
> + {
> + fake_stat64buf(buf);
> + }
> + }
> + return result;
> +}
> +
> +/* Added in v0.8 as suggested by Daniel Kahn Gillmor */
> +#ifndef NO_ATFILE
> +int __fxstatat64 (int ver, int fildes, const char *filename, struct stat64 *buf, int flag)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (NULL == real_fstatat64)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original fstatat64() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + int result;
> + DONT_FAKE_TIME(result = real_fstatat64(ver, fildes, filename, buf, flag));
> + if (result == -1)
> + {
> + return -1;
> + }
> +
> + if (buf != NULL)
> + {
> + if (!fake_stat_disabled)
> + {
> + fake_stat64buf(buf);
> + }
> + }
> + return result;
> +}
> +#endif
> +
> +/* Contributed by Philipp Hachtmann in version 0.6 */
> +int __lxstat64 (int ver, const char *path, struct stat64 *buf)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (NULL == real_lstat64)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original lstat() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + int result;
> + DONT_FAKE_TIME(result = real_lstat64(ver, path, buf));
> + if (result == -1)
> + {
> + return -1;
> + }
> +
> + if (buf != NULL)
> + {
> + if (!fake_stat_disabled)
> + {
> + fake_stat64buf(buf);
> + }
> + }
> + return result;
> +}
> +#endif
> +
> +/*
> + * =======================================================================
> + * Faked system functions: sleep/alarm/poll/timer related === FAKE(SLEEP)
> + * =======================================================================
> + * Contributed by Balint Reczey in v0.9.5
> + */
> +
> +#ifdef FAKE_SLEEP
> +/*
> + * Faked nanosleep()
> + */
> +int nanosleep(const struct timespec *req, struct timespec *rem)
> +{
> + int result;
> + struct timespec real_req;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (real_nanosleep == NULL)
> + {
> + return -1;
> + }
> + if (req != NULL)
> + {
> + if (user_rate_set && !dont_fake)
> + {
> + timespecmul(req, 1.0 / user_rate, &real_req);
> + }
> + else
> + {
> + real_req = *req;
> + }
> + }
> + else
> + {
> + return -1;
> + }
> +
> + DONT_FAKE_TIME(result = (*real_nanosleep)(&real_req, rem));
> + if (result == -1)
> + {
> + return result;
> + }
> +
> + /* fake returned parts */
> + if ((rem != NULL) && ((rem->tv_sec != 0) || (rem->tv_nsec != 0)))
> + {
> + if (user_rate_set && !dont_fake)
> + {
> + timespecmul(rem, user_rate, rem);
> + }
> + }
> + /* return the result to the caller */
> + return result;
> +}
> +
> +/*
> + * Faked usleep()
> + */
> +int usleep(useconds_t usec)
> +{
> + int result;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (user_rate_set && !dont_fake)
> + {
> + struct timespec real_req;
> +
> + if (real_nanosleep == NULL)
> + {
> + /* fall back to usleep() */
> + if (real_usleep == NULL)
> + {
> + return -1;
> + }
> + DONT_FAKE_TIME(result = (*real_usleep)((1.0 / user_rate) * usec));
> + return result;
> + }
> +
> + real_req.tv_sec = usec / 1000000;
> + real_req.tv_nsec = (usec % 1000000) * 1000;
> + timespecmul(&real_req, 1.0 / user_rate, &real_req);
> + DONT_FAKE_TIME(result = (*real_nanosleep)(&real_req, NULL));
> + }
> + else
> + {
> + DONT_FAKE_TIME(result = (*real_usleep)(usec));
> + }
> + return result;
> +}
> +
> +/*
> + * Faked sleep()
> + */
> +unsigned int sleep(unsigned int seconds)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (user_rate_set && !dont_fake)
> + {
> + if (real_nanosleep == NULL)
> + {
> + /* fall back to sleep */
> + unsigned int ret;
> + if (real_sleep == NULL)
> + {
> + return 0;
> + }
> + DONT_FAKE_TIME(ret = (*real_sleep)((1.0 / user_rate) * seconds));
> + return (user_rate_set && !dont_fake)?(user_rate * ret):ret;
> + }
> + else
> + {
> + int result;
> + struct timespec real_req = {seconds, 0}, rem;
> + timespecmul(&real_req, 1.0 / user_rate, &real_req);
> + DONT_FAKE_TIME(result = (*real_nanosleep)(&real_req, &rem));
> + if (result == -1)
> + {
> + return 0;
> + }
> +
> + /* fake returned parts */
> + if ((rem.tv_sec != 0) || (rem.tv_nsec != 0))
> + {
> + timespecmul(&rem, user_rate, &rem);
> + }
> + /* return the result to the caller */
> + return rem.tv_sec;
> + }
> + }
> + else
> + {
> + /* no need to fake anything */
> + unsigned int ret;
> + DONT_FAKE_TIME(ret = (*real_sleep)(seconds));
> + return ret;
> + }
> +}
> +
> +/*
> + * Faked alarm()
> + * @note due to rounding alarm(2) with faketime -f '+0 x7' won't wait 2/7
> + * wall clock seconds but 0 seconds
> + */
> +unsigned int alarm(unsigned int seconds)
> +{
> + unsigned int ret;
> + unsigned int seconds_real = (user_rate_set && !dont_fake)?((1.0 / user_rate) * seconds):seconds;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (real_alarm == NULL)
> + {
> + return -1;
> + }
> +
> + DONT_FAKE_TIME(ret = (*real_alarm)(seconds_real));
> + return (user_rate_set && !dont_fake)?(user_rate * ret):ret;
> +}
> +
> +/*
> + * Faked ppoll()
> + */
> +int ppoll(struct pollfd *fds, nfds_t nfds,
> + const struct timespec *timeout_ts, const sigset_t *sigmask)
> +{
> + struct timespec real_timeout, *real_timeout_pt;
> + int ret;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (real_ppoll == NULL)
> + {
> + return -1;
> + }
> + if (timeout_ts != NULL)
> + {
> + if (user_rate_set && !dont_fake && (timeout_ts->tv_sec > 0))
> + {
> + timespecmul(timeout_ts, 1.0 / user_rate, &real_timeout);
> + real_timeout_pt = &real_timeout;
> + }
> + else
> + {
> + /* cast away constness */
> + real_timeout_pt = (struct timespec *)timeout_ts;
> + }
> + }
> + else
> + {
> + real_timeout_pt = NULL;
> + }
> +
> + DONT_FAKE_TIME(ret = (*real_ppoll)(fds, nfds, real_timeout_pt, sigmask));
> + return ret;
> +}
> +
> +/*
> + * Faked poll()
> + */
> +int poll(struct pollfd *fds, nfds_t nfds, int timeout)
> +{
> + int ret, timeout_real = (user_rate_set && !dont_fake && (timeout > 0))?(timeout / user_rate):timeout;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (real_poll == NULL)
> + {
> + return -1;
> + }
> +
> + DONT_FAKE_TIME(ret = (*real_poll)(fds, nfds, timeout_real));
> + return ret;
> +}
> +
> +/*
> + * Faked select()
> + */
> +int select(int nfds, fd_set *readfds,
> + fd_set *writefds,
> + fd_set *errorfds,
> + struct timeval *timeout)
> +{
> + int ret;
> + struct timeval timeout_real;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> +
> + if (real_select == NULL)
> + {
> + return -1;
> + }
> +
> + if (timeout != NULL)
> + {
> + if (user_rate_set && !dont_fake && (timeout->tv_sec > 0 || timeout->tv_usec > 0))
> + {
> + struct timespec ts;
> +
> + ts.tv_sec = timeout->tv_sec;
> + ts.tv_nsec = timeout->tv_usec * 1000;
> +
> + timespecmul(&ts, 1.0 / user_rate, &ts);
> +
> + timeout_real.tv_sec = ts.tv_sec;
> + timeout_real.tv_usec = ts.tv_nsec / 1000;
> + }
> + else
> + {
> + timeout_real.tv_sec = timeout->tv_sec;
> + timeout_real.tv_usec = timeout->tv_usec;
> + }
> + }
> +
> + DONT_FAKE_TIME(ret = (*real_select)(nfds, readfds, writefds, errorfds, timeout == NULL ? timeout : &timeout_real));
> + return ret;
> +}
> +
> +int sem_timedwait(sem_t *sem, const struct timespec *abs_timeout)
> +{
> + int result;
> + struct timespec real_abs_timeout, *real_abs_timeout_pt;
> +
> + /* sanity check */
> + if (abs_timeout == NULL)
> + {
> + return -1;
> + }
> +
> + if (NULL == real_sem_timedwait)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original sem_timedwait() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + if (!dont_fake)
> + {
> + struct timespec tdiff, timeadj;
> +
> + timespecsub(abs_timeout, &ftpl_starttime.real, &tdiff);
> +
> + if (user_rate_set)
> + {
> + timespecmul(&tdiff, user_rate, &timeadj);
> + }
> + else
> + {
> + timeadj = tdiff;
> + }
> + timespecadd(&user_faked_time_timespec, &timeadj, &real_abs_timeout);
> + real_abs_timeout_pt = &real_abs_timeout;
> + }
> + else
> + {
> + /* cast away constness */
> + real_abs_timeout_pt = (struct timespec *)abs_timeout;
> + }
> +
> + DONT_FAKE_TIME(result = (*real_sem_timedwait)(sem, real_abs_timeout_pt));
> + return result;
> +}
> +#endif
> +
> +#ifndef __APPLE__
> +#ifdef FAKE_TIMERS
> +
> +/* timer related functions and structures */
> +typedef union {
> + int int_member;
> + timer_t timer_t_member;
> +} timer_t_or_int;
> +
> +/*
> + * Faketime's function implementation's compatibility mode
> + */
> +typedef enum {FT_COMPAT_GLIBC_2_2, FT_COMPAT_GLIBC_2_3_3} ft_lib_compat;
> +
> +
> +/*
> + * Faked timer_settime()
> + * Does not affect timer speed when stepping clock with each time() call.
> + */
> +static int
> +timer_settime_common(timer_t_or_int timerid, int flags,
> + const struct itimerspec *new_value,
> + struct itimerspec *old_value, ft_lib_compat compat)
> +{
> + int result;
> + struct itimerspec new_real;
> + struct itimerspec *new_real_pt = &new_real;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (new_value == NULL)
> + {
> + new_real_pt = NULL;
> + }
> + else if (dont_fake)
> + {
> + /* cast away constness*/
> + new_real_pt = (struct itimerspec *)new_value;
> + }
> + else
> + {
> + /* set it_value */
> + if ((new_value->it_value.tv_sec != 0) ||
> + (new_value->it_value.tv_nsec != 0))
> + {
> + if (flags & TIMER_ABSTIME)
> + {
> + struct timespec tdiff, timeadj;
> + timespecsub(&new_value->it_value, &user_faked_time_timespec, &timeadj);
> + if (user_rate_set)
> + {
> + timespecmul(&timeadj, 1.0/user_rate, &tdiff);
> + }
> + else
> + {
> + tdiff = timeadj;
> + }
> + /* only CLOCK_REALTIME is handled */
> + timespecadd(&ftpl_starttime.real, &tdiff, &new_real.it_value);
> + }
> + else
> + {
> + if (user_rate_set)
> + {
> + timespecmul(&new_value->it_value, 1.0/user_rate, &new_real.it_value);
> + }
> + else
> + {
> + new_real.it_value = new_value->it_value;
> + }
> + }
> + }
> + else
> + {
> + new_real.it_value = new_value->it_value;
> + }
> + /* set it_interval */
> + if (user_rate_set && ((new_value->it_interval.tv_sec != 0) ||
> + (new_value->it_interval.tv_nsec != 0)))
> + {
> + timespecmul(&new_value->it_interval, 1.0/user_rate, &new_real.it_interval);
> + }
> + else
> + {
> + new_real.it_interval = new_value->it_interval;
> + }
> + }
> +
> + switch (compat)
> + {
> + case FT_COMPAT_GLIBC_2_2:
> + DONT_FAKE_TIME(result = (*real_timer_settime_22)(timerid.int_member, flags,
> + new_real_pt, old_value));
> + break;
> + case FT_COMPAT_GLIBC_2_3_3:
> + DONT_FAKE_TIME(result = (*real_timer_settime_233)(timerid.timer_t_member,
> + flags, new_real_pt, old_value));
> + break;
> + default:
> + result = -1;
> + break;
> + }
> +
> + if (result == -1)
> + {
> + return result;
> + }
> +
> + /* fake returned parts */
> + if ((old_value != NULL) && !dont_fake)
> + {
> + if ((old_value->it_value.tv_sec != 0) ||
> + (old_value->it_value.tv_nsec != 0))
> + {
> + result = fake_clock_gettime(CLOCK_REALTIME, &old_value->it_value);
> + }
> + if (user_rate_set && ((old_value->it_interval.tv_sec != 0) ||
> + (old_value->it_interval.tv_nsec != 0)))
> + {
> + timespecmul(&old_value->it_interval, user_rate, &old_value->it_interval);
> + }
> + }
> +
> + /* return the result to the caller */
> + return result;
> +}
> +
> +/*
> + * Faked timer_settime() compatible with implementation in GLIBC 2.2
> + */
> +int timer_settime_22(int timerid, int flags,
> + const struct itimerspec *new_value,
> + struct itimerspec *old_value)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (real_timer_settime_22 == NULL)
> + {
> + return -1;
> + }
> + else
> + {
> + return (timer_settime_common((timer_t_or_int)timerid, flags, new_value, old_value,
> + FT_COMPAT_GLIBC_2_2));
> + }
> +}
> +
> +/*
> + * Faked timer_settime() compatible with implementation in GLIBC 2.3.3
> + */
> +int timer_settime_233(timer_t timerid, int flags,
> + const struct itimerspec *new_value,
> + struct itimerspec *old_value)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (real_timer_settime_233 == NULL)
> + {
> + return -1;
> + }
> + else
> + {
> + return (timer_settime_common((timer_t_or_int)timerid, flags, new_value, old_value,
> + FT_COMPAT_GLIBC_2_3_3));
> + }
> +}
> +
> +/*
> + * Faked timer_gettime()
> + * Does not affect timer speed when stepping clock with each time() call.
> + */
> +int timer_gettime_common(timer_t_or_int timerid, struct itimerspec *curr_value, ft_lib_compat compat)
> +{
> + int result;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (real_timer_gettime_233 == NULL)
> + {
> + return -1;
> + }
> +
> + switch (compat)
> + {
> + case FT_COMPAT_GLIBC_2_2:
> + DONT_FAKE_TIME(result = (*real_timer_gettime_22)(timerid.int_member, curr_value));
> + break;
> + case FT_COMPAT_GLIBC_2_3_3:
> + DONT_FAKE_TIME(result = (*real_timer_gettime_233)(timerid.timer_t_member, curr_value));
> + break;
> + default:
> + result = -1;
> + break;
> + }
> +
> + if (result == -1)
> + {
> + return result;
> + }
> +
> + /* fake returned parts */
> + if (curr_value != NULL)
> + {
> + if (user_rate_set && !dont_fake)
> + {
> + timespecmul(&curr_value->it_interval, user_rate, &curr_value->it_interval);
> + timespecmul(&curr_value->it_value, user_rate, &curr_value->it_value);
> + }
> + }
> + /* return the result to the caller */
> + return result;
> +}
> +
> +/*
> + * Faked timer_gettime() compatible with implementation in GLIBC 2.2
> + */
> +int timer_gettime_22(timer_t timerid, struct itimerspec *curr_value)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (real_timer_gettime_22 == NULL)
> + {
> + return -1;
> + }
> + else
> + {
> + return (timer_gettime_common((timer_t_or_int)timerid, curr_value,
> + FT_COMPAT_GLIBC_2_2));
> + }
> +}
> +
> +/*
> + * Faked timer_gettime() compatible with implementation in GLIBC 2.3.3
> + */
> +int timer_gettime_233(timer_t timerid, struct itimerspec *curr_value)
> +{
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + if (real_timer_gettime_233 == NULL)
> + {
> + return -1;
> + }
> + else
> + {
> + return (timer_gettime_common((timer_t_or_int)timerid, curr_value,
> + FT_COMPAT_GLIBC_2_3_3));
> + }
> +}
> +
> +__asm__(".symver timer_gettime_22, timer_gettime@GLIBC_2.2");
> +__asm__(".symver timer_gettime_233, timer_gettime@@GLIBC_2.3.3");
> +__asm__(".symver timer_settime_22, timer_settime@GLIBC_2.2");
> +__asm__(".symver timer_settime_233, timer_settime@@GLIBC_2.3.3");
> +
> +#endif
> +#endif
> +
> +
> +/*
> + * =======================================================================
> + * Faked system functions: basic time functions === FAKE(TIME)
> + * =======================================================================
> + */
> +
> +/*
> + * time() implementation using clock_gettime()
> + * @note Does not check for EFAULT, see man 2 time
> + */
> +time_t time(time_t *time_tptr)
> +{
> + struct timespec tp;
> + time_t result;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + DONT_FAKE_TIME(result = (*real_clock_gettime)(CLOCK_REALTIME, &tp));
> + if (result == -1) return -1;
> +
> + /* pass the real current time to our faking version, overwriting it */
> + (void)fake_clock_gettime(CLOCK_REALTIME, &tp);
> +
> + if (time_tptr != NULL)
> + {
> + *time_tptr = tp.tv_sec;
> + }
> + return tp.tv_sec;
> +}
> +
> +int ftime(struct timeb *tb)
> +{
> + struct timespec tp;
> + int result;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + /* sanity check */
> + if (tb == NULL)
> + return 0; /* ftime() always returns 0, see manpage */
> +
> + /* Check whether we've got a pointer to the real ftime() function yet */
> + if (NULL == real_ftime)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original ftime() not found.\n");
> +#endif
> + return 0; /* propagate error to caller */
> + }
> +
> + /* initialize our TZ result with the real current time */
> + DONT_FAKE_TIME(result = (*real_ftime)(tb));
> + if (result == -1)
> + {
> + return result;
> + }
> +
> + DONT_FAKE_TIME(result = (*real_clock_gettime)(CLOCK_REALTIME, &tp));
> + if (result == -1) return -1;
> +
> + /* pass the real current time to our faking version, overwriting it */
> + (void)fake_clock_gettime(CLOCK_REALTIME, &tp);
> +
> + tb->time = tp.tv_sec;
> + tb->millitm = tp.tv_nsec / 1000000;
> +
> + /* return the result to the caller */
> + return result; /* will always be 0 (see manpage) */
> +}
> +
> +int gettimeofday(struct timeval *tv, void *tz)
> +{
> + int result;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + /* sanity check */
> + if (tv == NULL)
> + {
> + return -1;
> + }
> +
> + /* Check whether we've got a pointer to the real ftime() function yet */
> + if (NULL == real_gettimeofday)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original gettimeofday() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + /* initialize our result with the real current time */
> + DONT_FAKE_TIME(result = (*real_gettimeofday)(tv, tz));
> + if (result == -1) return result; /* original function failed */
> +
> + /* pass the real current time to our faking version, overwriting it */
> + result = fake_gettimeofday(tv);
> +
> + /* return the result to the caller */
> + return result;
> +}
> +
> +int clock_gettime(clockid_t clk_id, struct timespec *tp)
> +{
> + int result;
> +
> + if (!initialized)
> + {
> + ftpl_init();
> + }
> + /* sanity check */
> + if (tp == NULL)
> + {
> + return -1;
> + }
> +
> + if (NULL == real_clock_gettime)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original clock_gettime() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + /* initialize our result with the real current time */
> + DONT_FAKE_TIME(result = (*real_clock_gettime)(clk_id, tp));
> + if (result == -1) return result; /* original function failed */
> +
> + /* pass the real current time to our faking version, overwriting it */
> + if (fake_monotonic_clock || clk_id != CLOCK_MONOTONIC)
> + {
> + result = fake_clock_gettime(clk_id, tp);
> + }
> +
> + /* return the result to the caller */
> + return result;
> +}
> +
> +
> +/*
> + * =======================================================================
> + * Parsing the user's faketime requests === PARSE
> + * =======================================================================
> + */
> +
> +static void parse_ft_string(const char *user_faked_time)
> +{
> + struct tm user_faked_time_tm;
> + char * tmp_time_fmt;
> +
> + if (!strncmp(user_faked_time, user_faked_time_saved, BUFFERLEN))
> + {
> + /* No change */
> + return;
> + }
> +
> + /* check whether the user gave us an absolute time to fake */
> + switch (user_faked_time[0])
> + {
> +
> + default: /* Try and interpret this as a specified time */
> + if (ft_mode != FT_NOOP) ft_mode = FT_FREEZE;
> + user_faked_time_tm.tm_isdst = -1;
> + if (NULL != strptime(user_faked_time, user_faked_time_fmt, &user_faked_time_tm))
> + {
> + user_faked_time_timespec.tv_sec = mktime(&user_faked_time_tm);
> + user_faked_time_timespec.tv_nsec = 0;
> + user_faked_time_set = true;
> + }
> + else
> + {
> + perror("Failed to parse FAKETIME timestamp");
> + exit(EXIT_FAILURE);
> + }
> + break;
> +
> + case '+':
> + case '-': /* User-specified offset */
> + if (ft_mode != FT_NOOP) ft_mode = FT_START_AT;
> + /* fractional time offsets contributed by Karl Chen in v0.8 */
> + double frac_offset = atof(user_faked_time);
> +
> + /* offset is in seconds by default, but the string may contain
> + * multipliers...
> + */
> + if (strchr(user_faked_time, 'm') != NULL) frac_offset *= 60;
> + else if (strchr(user_faked_time, 'h') != NULL) frac_offset *= 60 * 60;
> + else if (strchr(user_faked_time, 'd') != NULL) frac_offset *= 60 * 60 * 24;
> + else if (strchr(user_faked_time, 'y') != NULL) frac_offset *= 60 * 60 * 24 * 365;
> +
> + user_offset.tv_sec = floor(frac_offset);
> + user_offset.tv_nsec = (frac_offset - user_offset.tv_sec) * SEC_TO_nSEC;
> + timespecadd(&ftpl_starttime.real, &user_offset, &user_faked_time_timespec);
> + goto parse_modifiers;
> + break;
> +
> + /* Contributed by David North, TDI in version 0.7 */
> + case '@': /* Specific time, but clock along relative to that starttime */
> + ft_mode = FT_START_AT;
> + user_faked_time_tm.tm_isdst = -1;
> + (void) strptime(&user_faked_time[1], user_faked_time_fmt, &user_faked_time_tm);
> +
> + user_faked_time_timespec.tv_sec = mktime(&user_faked_time_tm);
> + user_faked_time_timespec.tv_nsec = 0;
> +
> + /* Reset starttime */
> + system_time_from_system(&ftpl_starttime);
> + goto parse_modifiers;
> + break;
> +
> + case 'i':
> + case 'x': /* Only modifiers are passed, don't fall back to strptime */
> +parse_modifiers:
> + /* Speed-up / slow-down contributed by Karl Chen in v0.8 */
> + if (strchr(user_faked_time, 'x') != NULL)
> + {
> + user_rate = atof(strchr(user_faked_time, 'x')+1);
> + user_rate_set = true;
> + }
> + else if (NULL != (tmp_time_fmt = strchr(user_faked_time, 'i')))
> + {
> + double tick_inc = atof(tmp_time_fmt + 1);
> + /* increment time with every time() call*/
> + user_per_tick_inc.tv_sec = floor(tick_inc);
> + user_per_tick_inc.tv_nsec = (tick_inc - user_per_tick_inc.tv_sec) * SEC_TO_nSEC ;
> + user_per_tick_inc_set = true;
> + }
> + break;
> + } // end of switch
> +
> + strncpy(user_faked_time_saved, user_faked_time, BUFFERLEN-1);
> + user_faked_time_saved[BUFFERLEN-1] = 0;
> +#ifdef DEBUG
> + fprintf(stderr, "new FAKETIME: %s\n", user_faked_time_saved);
> +#endif
> +}
> +
> +
> +/*
> + * =======================================================================
> + * Initialization === INIT
> + * =======================================================================
> + */
> +
> +void ftpl_init(void)
> +{
> + char *tmp_env;
> + bool dont_fake_final;
> +
> +#ifdef __APPLE__
> + const char *progname = getprogname();
> +#else
> + const char *progname = __progname;
> +#endif
> +
> + /* Look up all real_* functions. NULL will mark missing ones. */
> + real_stat = dlsym(RTLD_NEXT, "__xstat");
> + real_fstat = dlsym(RTLD_NEXT, "__fxstat");
> + real_fstatat = dlsym(RTLD_NEXT, "__fxstatat");
> + real_lstat = dlsym(RTLD_NEXT, "__lxstat");
> + real_stat64 = dlsym(RTLD_NEXT,"__xstat64");
> + real_fstat64 = dlsym(RTLD_NEXT, "__fxstat64");
> + real_fstatat64 = dlsym(RTLD_NEXT, "__fxstatat64");
> + real_lstat64 = dlsym(RTLD_NEXT, "__lxstat64");
> + real_time = dlsym(RTLD_NEXT, "time");
> + real_ftime = dlsym(RTLD_NEXT, "ftime");
> + real_gettimeofday = dlsym(RTLD_NEXT, "gettimeofday");
> +#ifdef FAKE_SLEEP
> + real_nanosleep = dlsym(RTLD_NEXT, "nanosleep");
> + real_usleep = dlsym(RTLD_NEXT, "usleep");
> + real_sleep = dlsym(RTLD_NEXT, "sleep");
> + real_alarm = dlsym(RTLD_NEXT, "alarm");
> + real_poll = dlsym(RTLD_NEXT, "poll");
> + real_ppoll = dlsym(RTLD_NEXT, "ppoll");
> + real_select = dlsym(RTLD_NEXT, "select");
> + real_sem_timedwait = dlsym(RTLD_NEXT, "sem_timedwait");
> +#endif
> +#ifdef FAKE_INTERNAL_CALLS
> + real___ftime = dlsym(RTLD_NEXT, "__ftime");
> + real___gettimeofday = dlsym(RTLD_NEXT, "__gettimeofday");
> + real___clock_gettime = dlsym(RTLD_NEXT, "__clock_gettime");
> +#endif
> +#ifdef __APPLEOSX__
> + real_clock_get_time = dlsym(RTLD_NEXT, "clock_get_time");
> + real_clock_gettime = apple_clock_gettime;
> +#else
> + real_clock_gettime = dlsym(RTLD_NEXT, "__clock_gettime");
> + if (NULL == real_clock_gettime)
> + {
> + real_clock_gettime = dlsym(RTLD_NEXT, "clock_gettime");
> + }
> +#ifdef FAKE_TIMERS
> +#if defined(__sun)
> + real_timer_gettime_233 = dlsym(RTLD_NEXT, "timer_gettime");
> + real_timer_settime_233 = dlsym(RTLD_NEXT, "timer_settime");
> +#else
> + real_timer_settime_22 = dlvsym(RTLD_NEXT, "timer_settime","GLIBC_2.2");
> + real_timer_settime_233 = dlvsym(RTLD_NEXT, "timer_settime","GLIBC_2.3.3");
> + if (NULL == real_timer_settime_233)
> + {
> + real_timer_settime_233 = dlsym(RTLD_NEXT, "timer_settime");
> + }
> + real_timer_gettime_22 = dlvsym(RTLD_NEXT, "timer_gettime","GLIBC_2.2");
> + real_timer_gettime_233 = dlvsym(RTLD_NEXT, "timer_gettime","GLIBC_2.3.3");
> + if (NULL == real_timer_gettime_233)
> + {
> + real_timer_gettime_233 = dlsym(RTLD_NEXT, "timer_gettime");
> + }
> +#endif
> +#endif
> +#endif
> +
> + dont_fake = true; // Do not fake times during initialization
> + dont_fake_final = false;
> + initialized = 1;
> +
> + ft_shm_init();
> +#ifdef FAKE_STAT
> + if (getenv("NO_FAKE_STAT")!=NULL)
> + {
> + fake_stat_disabled = 1; //Note that this is NOT re-checked
> + }
> +#endif
> +
> + if ((tmp_env = getenv("FAKETIME_CACHE_DURATION")) != NULL)
> + {
> + cache_duration = atoi(tmp_env);
> + }
> + if ((tmp_env = getenv("FAKETIME_NO_CACHE")) != NULL)
> + {
> + if (0 == strcmp(tmp_env, "1"))
> + {
> + cache_enabled = 0;
> + }
> + }
> + if ((tmp_env = getenv("DONT_FAKE_MONOTONIC")) != NULL)
> + {
> + if (0 == strcmp(tmp_env, "1"))
> + {
> + fake_monotonic_clock = 0;
> + }
> + }
> + /* Check whether we actually should be faking the returned timestamp. */
> +
> + /* We can prevent faking time for specified commands */
> + if ((tmp_env = getenv("FAKETIME_SKIP_CMDS")) != NULL)
> + {
> + char *skip_cmd, *saveptr, *tmpvar;
> + /* Don't mess with the env variable directly. */
> + tmpvar = strdup(tmp_env);
> + if (tmpvar != NULL)
> + {
> + skip_cmd = strtok_r(tmpvar, ",", &saveptr);
> + while (skip_cmd != NULL)
> + {
> + if (0 == strcmp(progname, skip_cmd))
> + {
> + ft_mode = FT_NOOP;
> + dont_fake_final = true;
> + break;
> + }
> + skip_cmd = strtok_r(NULL, ",", &saveptr);
> + }
> + free(tmpvar);
> + tmpvar = NULL;
> + }
> + else
> + {
> + fprintf(stderr, "Error: Could not copy the environment variable value.\n");
> + exit(EXIT_FAILURE);
> + }
> + }
> +
> + /* We can limit faking time to specified commands */
> + if ((tmp_env = getenv("FAKETIME_ONLY_CMDS")) != NULL)
> + {
> + char *only_cmd, *saveptr, *tmpvar;
> + bool cmd_matched = false;
> +
> + if (getenv("FAKETIME_SKIP_CMDS") != NULL)
> + {
> + fprintf(stderr, "Error: Both FAKETIME_SKIP_CMDS and FAKETIME_ONLY_CMDS can't be set.\n");
> + exit(EXIT_FAILURE);
> + }
> +
> + /* Don't mess with the env variable directly. */
> + tmpvar = strdup(tmp_env);
> + if (tmpvar != NULL) {
> + only_cmd = strtok_r(tmpvar, ",", &saveptr);
> + while (only_cmd != NULL)
> + {
> + if (0 == strcmp(progname, only_cmd))
> + {
> + cmd_matched = true;
> + break;
> + }
> + only_cmd = strtok_r(NULL, ",", &saveptr);
> + }
> +
> + if (!cmd_matched)
> + {
> + ft_mode = FT_NOOP;
> + dont_fake_final = true;
> + }
> + free(tmpvar);
> + } else {
> + fprintf(stderr, "Error: Could not copy the environment variable value.\n");
> + exit(EXIT_FAILURE);
> + }
> + }
> +
> + if ((tmp_env = getenv("FAKETIME_START_AFTER_SECONDS")) != NULL)
> + {
> + ft_start_after_secs = atol(tmp_env);
> + limited_faking = true;
> + }
> + if ((tmp_env = getenv("FAKETIME_STOP_AFTER_SECONDS")) != NULL)
> + {
> + ft_stop_after_secs = atol(tmp_env);
> + limited_faking = true;
> + }
> + if ((tmp_env = getenv("FAKETIME_START_AFTER_NUMCALLS")) != NULL)
> + {
> + ft_start_after_ncalls = atol(tmp_env);
> + limited_faking = true;
> + }
> + if ((tmp_env = getenv("FAKETIME_STOP_AFTER_NUMCALLS")) != NULL)
> + {
> + ft_stop_after_ncalls = atol(tmp_env);
> + limited_faking = true;
> + }
> +
> + /* check whether we should spawn an external command */
> + if ((tmp_env = getenv("FAKETIME_SPAWN_TARGET")) != NULL)
> + {
> + spawnsupport = true;
> + (void) strncpy(ft_spawn_target, getenv("FAKETIME_SPAWN_TARGET"), 1024);
> + if ((tmp_env = getenv("FAKETIME_SPAWN_SECONDS")) != NULL)
> + {
> + ft_spawn_secs = atol(tmp_env);
> + }
> + if ((tmp_env = getenv("FAKETIME_SPAWN_NUMCALLS")) != NULL)
> + {
> + ft_spawn_ncalls = atol(tmp_env);
> + }
> + }
> +
> + if ((tmp_env = getenv("FAKETIME_SAVE_FILE")) != NULL)
> + {
> + if (-1 == (outfile = open(tmp_env, O_RDWR | O_APPEND | O_CLOEXEC | O_CREAT,
> + S_IWUSR | S_IRUSR)))
> + {
> + perror("Opening file for saving timestamps failed");
> + exit(EXIT_FAILURE);
> + }
> + }
> +
> + /* load file only if reading timstamps from it is not finished yet */
> + if ((tmp_env = getenv("FAKETIME_LOAD_FILE")) != NULL)
> + {
> + int infile = -1;
> + struct stat sb;
> + if (-1 == (infile = open(tmp_env, O_RDONLY|O_CLOEXEC)))
> + {
> + perror("Opening file for loading timestamps failed");
> + exit(EXIT_FAILURE);
> + }
> +
> + fstat(infile, &sb);
> + if (sizeof(stss[0]) > (infile_size = sb.st_size))
> + {
> + printf("There are no timestamps in the provided file to load timestamps from");
> + exit(EXIT_FAILURE);
> + }
> +
> + if ((infile_size % sizeof(stss[0])) != 0)
> + {
> + printf("File size is not multiple of timestamp size. It is probably damaged.");
> + exit(EXIT_FAILURE);
> + }
> +
> + stss = mmap(NULL, infile_size, PROT_READ, MAP_SHARED, infile, 0);
> + if (stss == MAP_FAILED)
> + {
> + perror("Mapping file for loading timestamps failed");
> + exit(EXIT_FAILURE);
> + }
> + infile_set = true;
> + }
> +
> + tmp_env = getenv("FAKETIME_FMT");
> + if (tmp_env == NULL)
> + {
> + strcpy(user_faked_time_fmt, "%Y-%m-%d %T");
> + }
> + else
> + {
> + strncpy(user_faked_time_fmt, tmp_env, BUFSIZ);
> + }
> +
> + if (shared_sem != 0)
> + {
> + if (sem_wait(shared_sem) == -1)
> + {
> + perror("sem_wait");
> + exit(1);
> + }
> + if (ft_shared->start_time.real.tv_nsec == -1)
> + {
> + /* set up global start time */
> + system_time_from_system(&ftpl_starttime);
> + ft_shared->start_time = ftpl_starttime;
> + }
> + else
> + {
> + /** get preset start time */
> + ftpl_starttime = ft_shared->start_time;
> + }
> + if (sem_post(shared_sem) == -1)
> + {
> + perror("sem_post");
> + exit(1);
> + }
> + }
> + else
> + {
> + system_time_from_system(&ftpl_starttime);
> + }
> + /* fake time supplied as environment variable? */
> + if (NULL != (tmp_env = getenv("FAKETIME")))
> + {
> + parse_config_file = false;
> + parse_ft_string(tmp_env);
> + }
> +
> + dont_fake = dont_fake_final;
> +}
> +
> +
> +/*
> + * =======================================================================
> + * Helper functions === HELPER
> + * =======================================================================
> + */
> +
> +static void remove_trailing_eols(char *line)
> +{
> + char *endp = line + strlen(line);
> + /*
> + * erase the last char if it's a newline
> + * or carriage return, and back up.
> + * keep doing this, but don't back up
> + * past the beginning of the string.
> + */
> +# define is_eolchar(c) ((c) == '\n' || (c) == '\r')
> + while (endp > line && is_eolchar(endp[-1]))
> + {
> + *--endp = '\0';
> + }
> +}
> +
> +
> +/*
> + * =======================================================================
> + * Implementation of faked functions === FAKE(FAKE)
> + * =======================================================================
> + */
> +
> +int fake_clock_gettime(clockid_t clk_id, struct timespec *tp)
> +{
> + /* variables used for caching, introduced in version 0.6 */
> + static time_t last_data_fetch = 0; /* not fetched previously at first call */
> + static int cache_expired = 1; /* considered expired at first call */
> +
> + if (dont_fake) return 0;
> + /* Per process timers are only sped up or slowed down */
> + if ((clk_id == CLOCK_PROCESS_CPUTIME_ID ) || (clk_id == CLOCK_THREAD_CPUTIME_ID))
> + {
> + if (user_rate_set)
> + {
> + timespecmul(tp, user_rate, tp);
> + }
> + return 0;
> + }
> +
> + /* Sanity check by Karl Chan since v0.8 */
> + if (tp == NULL) return -1;
> +
> +#ifdef PTHREAD_SINGLETHREADED_TIME
> + static pthread_mutex_t time_mutex=PTHREAD_MUTEX_INITIALIZER;
> + pthread_mutex_lock(&time_mutex);
> + pthread_cleanup_push((void (*)(void *))pthread_mutex_unlock, (void *)&time_mutex);
> +#endif
> +
> + if ((limited_faking &&
> + ((ft_start_after_ncalls != -1) || (ft_stop_after_ncalls != -1))) ||
> + (spawnsupport && ft_spawn_ncalls))
> + {
> + if (callcounter < LONG_MAX) callcounter++;
> + }
> +
> + if (limited_faking || spawnsupport)
> + {
> + struct timespec tmp_ts;
> + /* For debugging, output #seconds and #calls */
> + switch (clk_id)
> + {
> + case CLOCK_REALTIME:
> +#ifdef CLOCK_REALTIME_COARSE
> + case CLOCK_REALTIME_COARSE:
> +#endif
> + timespecsub(tp, &ftpl_starttime.real, &tmp_ts);
> + break;
> + case CLOCK_MONOTONIC:
> +#ifdef CLOCK_MONOTONIC_COARSE
> + case CLOCK_MONOTONIC_COARSE:
> +#endif
> + timespecsub(tp, &ftpl_starttime.mon, &tmp_ts);
> + break;
> + case CLOCK_MONOTONIC_RAW:
> + timespecsub(tp, &ftpl_starttime.mon_raw, &tmp_ts);
> + break;
> +#ifdef CLOCK_BOOTTIME
> + case CLOCK_BOOTTIME:
> + timespecsub(tp, &ftpl_starttime.boot, &tmp_ts);
> + break;
> +#endif
> + default:
> + printf("Invalid clock_id for clock_gettime: %d", clk_id);
> + exit(EXIT_FAILURE);
> + }
> +
> + if (limited_faking)
> + {
> + /* Check whether we actually should be faking the returned timestamp. */
> + /* fprintf(stderr, "(libfaketime limits -> runtime: %lu, callcounter: %lu\n", (*time_tptr - ftpl_starttime), callcounter); */
> + if ((ft_start_after_secs != -1) && (tmp_ts.tv_sec < ft_start_after_secs)) return 0;
> + if ((ft_stop_after_secs != -1) && (tmp_ts.tv_sec >= ft_stop_after_secs)) return 0;
> + if ((ft_start_after_ncalls != -1) && (callcounter < ft_start_after_ncalls)) return 0;
> + if ((ft_stop_after_ncalls != -1) && (callcounter >= ft_stop_after_ncalls)) return 0;
> + /* fprintf(stderr, "(libfaketime limits -> runtime: %lu, callcounter: %lu continues\n", (*time_tptr - ftpl_starttime), callcounter); */
> + }
> +
> + if (spawnsupport)
> + {
> + /* check whether we should spawn an external command */
> + if (spawned == 0)
> + { /* exec external command once only */
> + if (((tmp_ts.tv_sec == ft_spawn_secs) || (callcounter == ft_spawn_ncalls)) && (spawned == 0))
> + {
> + spawned = 1;
> + (void) (system(ft_spawn_target) + 1);
> + }
> + }
> + }
> + }
> +
> + if (last_data_fetch > 0)
> + {
> + if ((tp->tv_sec - last_data_fetch) > cache_duration)
> + {
> + cache_expired = 1;
> + }
> + else
> + {
> + cache_expired = 0;
> + }
> + }
> +
> + if (cache_enabled == 0)
> + {
> + cache_expired = 1;
> + }
> +
> + if (cache_expired == 1)
> + {
> + static char user_faked_time[BUFFERLEN]; /* changed to static for caching in v0.6 */
> + /* initialize with default or env. variable */
> + char *tmp_env;
> +
> + /* Can be enabled for testing ...
> + fprintf(stderr, "***************++ Cache expired ++**************\n");
> + */
> +
> + if (NULL != (tmp_env = getenv("FAKETIME")))
> + {
> + strncpy(user_faked_time, tmp_env, BUFFERLEN);
> + }
> + else
> + {
> + snprintf(user_faked_time, BUFFERLEN, "+0");
> + }
> +
> + last_data_fetch = tp->tv_sec;
> + /* fake time supplied as environment variable? */
> + if (parse_config_file)
> + {
> + char custom_filename[BUFSIZ];
> + char filename[BUFSIZ];
> + FILE *faketimerc;
> + /* check whether there's a .faketimerc in the user's home directory, or
> + * a system-wide /etc/faketimerc present.
> + * The /etc/faketimerc handling has been contributed by David Burley,
> + * Jacob Moorman, and Wayne Davison of SourceForge, Inc. in version 0.6 */
> + (void) snprintf(custom_filename, BUFSIZ, "%s", getenv("FAKETIME_TIMESTAMP_FILE"));
> + (void) snprintf(filename, BUFSIZ, "%s/.faketimerc", getenv("HOME"));
> + if ((faketimerc = fopen(custom_filename, "rt")) != NULL ||
> + (faketimerc = fopen(filename, "rt")) != NULL ||
> + (faketimerc = fopen("/etc/faketimerc", "rt")) != NULL)
> + {
> + char line[BUFFERLEN];
> + while(fgets(line, BUFFERLEN, faketimerc) != NULL)
> + {
> + if ((strlen(line) > 1) && (line[0] != ' ') &&
> + (line[0] != '#') && (line[0] != ';'))
> + {
> + remove_trailing_eols(line);
> + strncpy(user_faked_time, line, BUFFERLEN-1);
> + user_faked_time[BUFFERLEN-1] = 0;
> + break;
> + }
> + }
> + fclose(faketimerc);
> + }
> + } /* read fake time from file */
> + parse_ft_string(user_faked_time);
> + } /* cache had expired */
> +
> + if (infile_set)
> + {
> + if (load_time(tp))
> + {
> + return 0;
> + }
> + }
> +
> + /* check whether the user gave us an absolute time to fake */
> + switch (ft_mode)
> + {
> + case FT_FREEZE: /* a specified time */
> + if (user_faked_time_set)
> + {
> + *tp = user_faked_time_timespec;
> + }
> + break;
> +
> + case FT_START_AT: /* User-specified offset */
> + if (user_per_tick_inc_set)
> + {
> + /* increment time with every time() call*/
> + next_time(tp, &user_per_tick_inc);
> + }
> + else
> + {
> + /* Speed-up / slow-down contributed by Karl Chen in v0.8 */
> + struct timespec tdiff, timeadj;
> + switch (clk_id)
> + {
> + case CLOCK_REALTIME:
> +#ifdef CLOCK_REALTIME_COARSE
> + case CLOCK_REALTIME_COARSE:
> +#endif
> + timespecsub(tp, &ftpl_starttime.real, &tdiff);
> + break;
> + case CLOCK_MONOTONIC:
> +#ifdef CLOCK_MONOTONIC_COARSE
> + case CLOCK_MONOTONIC_COARSE:
> +#endif
> + timespecsub(tp, &ftpl_starttime.mon, &tdiff);
> + break;
> + case CLOCK_MONOTONIC_RAW:
> + timespecsub(tp, &ftpl_starttime.mon_raw, &tdiff);
> + break;
> +#ifdef CLOCK_BOOTTIME
> + case CLOCK_BOOTTIME:
> + timespecsub(tp, &ftpl_starttime.boot, &tdiff);
> + break;
> +#endif
> + default:
> + printf("Invalid clock_id for clock_gettime: %d", clk_id);
> + exit(EXIT_FAILURE);
> + } // end of switch (clk_id)
> + if (user_rate_set)
> + {
> + timespecmul(&tdiff, user_rate, &timeadj);
> + }
> + else
> + {
> + timeadj = tdiff;
> + }
> + timespecadd(&user_faked_time_timespec, &timeadj, tp);
> + }
> + break;
> +
> + default:
> + return -1;
> + } // end of switch(ft_mode)
> +
> +#ifdef PTHREAD_SINGLETHREADED_TIME
> + pthread_cleanup_pop(1);
> +#endif
> + save_time(tp);
> + return 0;
> +}
> +
> +int fake_gettimeofday(struct timeval *tv)
> +{
> + struct timespec ts;
> + int ret;
> + ts.tv_sec = tv->tv_sec;
> + ts.tv_nsec = tv->tv_usec * 1000 + ftpl_starttime.real.tv_nsec % 1000;
> +
> + ret = fake_clock_gettime(CLOCK_REALTIME, &ts);
> + tv->tv_sec = ts.tv_sec;
> + tv->tv_usec =ts.tv_nsec / 1000;
> +
> + return ret;
> +}
> +
> +
> +/*
> + * =======================================================================
> + * Faked system functions: Apple Mac OS X specific === FAKE(OSX)
> + * =======================================================================
> + */
> +
> +#ifdef __APPLEOSX__
> +/*
> + * clock_gettime implementation for __APPLE__
> + * @note It always behave like being called with CLOCK_REALTIME.
> + */
> +static int apple_clock_gettime(clockid_t clk_id, struct timespec *tp)
> +{
> + int result;
> + mach_timespec_t cur_timeclockid_t;
> + (void) clk_id; /* unused */
> +
> + if (NULL == real_clock_get_time)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original clock_get_time() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + DONT_FAKE_TIME(result = (*real_clock_get_time)(clock_serv_real, &cur_timeclockid_t));
> + tp->tv_sec = cur_timeclockid_t.tv_sec;
> + tp->tv_nsec = cur_timeclockid_t.tv_nsec;
> + return result;
> +}
> +
> +int clock_get_time(clock_serv_t clock_serv, mach_timespec_t *cur_timeclockid_t)
> +{
> + int result;
> + struct timespec ts;
> +
> + /*
> + * Initialize our result with the real current time from CALENDAR_CLOCK.
> + * This is a bit of cheating, but we don't keep track of obtained clock
> + * services.
> + */
> + DONT_FAKE_TIME(result = (*real_clock_gettime)(CLOCK_REALTIME, &ts));
> + if (result == -1) return result; /* original function failed */
> +
> + /* pass the real current time to our faking version, overwriting it */
> + result = fake_clock_gettime(CLOCK_REALTIME, &ts);
> + cur_timeclockid_t->tv_sec = ts.tv_sec;
> + cur_timeclockid_t->tv_nsec = ts.tv_nsec;
> +
> + /* return the result to the caller */
> + return result;
> +}
> +#endif
> +
> +
> +/*
> + * =======================================================================
> + * Faked system-internal functions === FAKE(INT)
> + * =======================================================================
> + */
> +
> +#ifdef FAKE_INTERNAL_CALLS
> +int __gettimeofday(struct timeval *tv, void *tz)
> +{
> + int result;
> +
> + /* sanity check */
> + if (tv == NULL)
> + {
> + return -1;
> + }
> +
> + /* Check whether we've got a pointer to the real ftime() function yet */
> + if (NULL == real___gettimeofday)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original __gettimeofday() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + /* initialize our result with the real current time */
> + DONT_FAKE_TIME(result = (*real___gettimeofday)(tv, tz));
> + if (result == -1) return result; /* original function failed */
> +
> + /* pass the real current time to our faking version, overwriting it */
> + result = fake_gettimeofday(tv);
> +
> + /* return the result to the caller */
> + return result;
> +}
> +
> +int __clock_gettime(clockid_t clk_id, struct timespec *tp)
> +{
> + int result;
> +
> + /* sanity check */
> + if (tp == NULL)
> + {
> + return -1;
> + }
> +
> + if (NULL == real___clock_gettime)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original __clock_gettime() not found.\n");
> +#endif
> + return -1; /* propagate error to caller */
> + }
> +
> + /* initialize our result with the real current time */
> + DONT_FAKE_TIME(result = (*real___clock_gettime)(clk_id, tp));
> + if (result == -1) return result; /* original function failed */
> +
> + /* pass the real current time to our faking version, overwriting it */
> + if (fake_monotonic_clock || clk_id != CLOCK_MONOTONIC)
> + {
> + result = fake_clock_gettime(clk_id, tp);
> + }
> +
> + /* return the result to the caller */
> + return result;
> +}
> +
> +time_t __time(time_t *time_tptr)
> +{
> + struct timespec tp;
> + time_t result;
> +
> + DONT_FAKE_TIME(result = (*real_clock_gettime)(CLOCK_REALTIME, &tp));
> + if (result == -1) return -1;
> +
> + /* pass the real current time to our faking version, overwriting it */
> + (void)fake_clock_gettime(CLOCK_REALTIME, &tp);
> +
> + if (time_tptr != NULL)
> + {
> + *time_tptr = tp.tv_sec;
> + }
> + return tp.tv_sec;
> +}
> +
> +int __ftime(struct timeb *tb)
> +{
> + struct timespec tp;
> + int result;
> +
> + /* sanity check */
> + if (tb == NULL)
> + return 0; /* ftime() always returns 0, see manpage */
> +
> + /* Check whether we've got a pointer to the real ftime() function yet */
> + if (NULL == real___ftime)
> + { /* dlsym() failed */
> +#ifdef DEBUG
> + (void) fprintf(stderr, "faketime problem: original ftime() not found.\n");
> +#endif
> + return 0; /* propagate error to caller */
> + }
> +
> + /* initialize our TZ result with the real current time */
> + DONT_FAKE_TIME(result = (*real___ftime)(tb));
> + if (result == -1)
> + {
> + return result;
> + }
> +
> + DONT_FAKE_TIME(result = (*real_clock_gettime)(CLOCK_REALTIME, &tp));
> + if (result == -1) return -1;
> +
> + /* pass the real current time to our faking version, overwriting it */
> + (void)fake_clock_gettime(CLOCK_REALTIME, &tp);
> +
> + tb->time = tp.tv_sec;
> + tb->millitm = tp.tv_nsec / 1000000;
> +
> + /* return the result to the caller */
> + return result; /* will always be 0 (see manpage) */
> +}
> +
> +#endif
> +
> +/*
> + * Editor modelines
> + *
> + * Local variables:
> + * c-basic-offset: 2
> + * tab-width: 2
> + * indent-tabs-mode: nil
> + * End:
> + *
> + * vi: set shiftwidth=2 tabstop=2 expandtab:
> + * :indentSize=2:tabSize=2:noTabs=true:
> + */
> +
> +/* eof */
> diff --git a/scripts/libfaketime/libfaketime.map b/scripts/libfaketime/libfaketime.map
> new file mode 100644
> index 0000000..6e008cf
> --- /dev/null
> +++ b/scripts/libfaketime/libfaketime.map
> @@ -0,0 +1,10 @@
> +GLIBC_2.2 {
> + global:
> +
> + timer_gettime; timer_settime;
> + local: timer_settime_*; timer_gettime_*;
> +};
> +GLIBC_2.3.3 {
> + # Changed timer_t.
> + timer_gettime; timer_settime;
> +} GLIBC_2.2;
> diff --git a/scripts/libfaketime/time_ops.h b/scripts/libfaketime/time_ops.h
> new file mode 100644
> index 0000000..59ab1ee
> --- /dev/null
> +++ b/scripts/libfaketime/time_ops.h
> @@ -0,0 +1,104 @@
> +/*
> + * Time operation macros based on sys/time.h
> + * Copyright 2013 Balint Reczey <balint@balintreczey.hu>
> + *
> + * This file is part of libfaketime.
> + *
> + * libfaketime is free software; you can redistribute it and/or modify it under
> + * the terms of the GNU General Public License v2 as published by the Free
> + * Software Foundation.
> + *
> + * libfaketime is distributed in the hope that it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License v2 along
> + * with libfaketime; if not, write to the Free Software Foundation, Inc.,
> + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + */
> +
> +#ifndef TIME_OPS_H
> +#define TIME_OPS_H
> +#include <time.h>
> +
> +#define SEC_TO_uSEC 1000000
> +#define SEC_TO_nSEC 1000000000
> +
> +/* Convenience macros for operations on timevals.
> + NOTE: `timercmp' does not work for >= or <=. */
> +#define timerisset2(tvp, prefix) ((tvp)->tv_sec || (tvp)->tv_##prefix##sec)
> +#define timerclear2(tvp, prefix) ((tvp)->tv_sec = (tvp)->tv_##prefix##sec = 0)
> +#define timercmp2(a, b, CMP, prefix) \
> + (((a)->tv_sec == (b)->tv_sec) ? \
> + ((a)->tv_##prefix##sec CMP (b)->tv_##prefix##sec) : \
> + ((a)->tv_sec CMP (b)->tv_sec))
> +#define timeradd2(a, b, result, prefix) \
> + do \
> + { \
> + (result)->tv_sec = (a)->tv_sec + (b)->tv_sec; \
> + (result)->tv_##prefix##sec = (a)->tv_##prefix##sec + \
> + (b)->tv_##prefix##sec; \
> + if ((result)->tv_##prefix##sec >= SEC_TO_##prefix##SEC) \
> + { \
> + ++(result)->tv_sec; \
> + (result)->tv_##prefix##sec -= SEC_TO_##prefix##SEC; \
> + } \
> + } while (0)
> +#define timersub2(a, b, result, prefix) \
> + do \
> + { \
> + (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
> + (result)->tv_##prefix##sec = (a)->tv_##prefix##sec - \
> + (b)->tv_##prefix##sec; \
> + if ((result)->tv_##prefix##sec < 0) \
> + { \
> + --(result)->tv_sec; \
> + (result)->tv_##prefix##sec += SEC_TO_##prefix##SEC; \
> + } \
> + } while (0)
> +#define timermul2(tvp, c, result, prefix) \
> + do \
> + { \
> + long long tmp_time; \
> + tmp_time = (c) * ((tvp)->tv_sec * SEC_TO_##prefix##SEC + \
> + (tvp)->tv_##prefix##sec); \
> + (result)->tv_##prefix##sec = tmp_time % SEC_TO_##prefix##SEC; \
> + (result)->tv_sec = (tmp_time - (result)->tv_##prefix##sec) / \
> + SEC_TO_##prefix##SEC; \
> + if ((result)->tv_##prefix##sec < 0) \
> + { \
> + (result)->tv_##prefix##sec += SEC_TO_##prefix##SEC; \
> + (result)->tv_sec -= 1; \
> + } \
> + } while (0)
> +
> +/* ops for microsecs */
> +#ifndef timerisset
> +#define timerisset(tvp) timerisset2(tvp,u)
> +#endif
> +#ifndef timerclear
> +#define timerclear(tvp) timerclear2(tvp, u)
> +#endif
> +#ifndef timercmp
> +#define timercmp(a, b, CMP) timercmp2(a, b, CMP, u)
> +#endif
> +#ifndef timeradd
> +#define timeradd(a, b, result) timeradd2(a, b, result, u)
> +#endif
> +#ifndef timersub
> +#define timersub(a, b, result) timersub2(a, b, result, u)
> +#endif
> +#ifndef timersub
> +#define timermul(a, c, result) timermul2(a, c, result, u)
> +#endif
> +
> +/* ops for nanosecs */
> +#define timespecisset(tvp) timerisset2(tvp,n)
> +#define timespecclear(tvp) timerclear2(tvp, n)
> +#define timespeccmp(a, b, CMP) timercmp2(a, b, CMP, n)
> +#define timespecadd(a, b, result) timeradd2(a, b, result, n)
> +#define timespecsub(a, b, result) timersub2(a, b, result, n)
> +#define timespecmul(a, c, result) timermul2(a, c, result, n)
> +
> +#endif
> --
> 1.9.1
>
>
> _______________________________________________
> ptxdist mailing list
> ptxdist@pengutronix.de
--
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Industrial Linux Solutions | http://www.pengutronix.de/ |
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prev parent reply other threads:[~2018-08-27 16:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-03 15:44 jon
2018-08-03 15:44 ` [ptxdist] [PATCH v4 2/2] Detect changes in package patch series jon
2018-08-08 9:50 ` [ptxdist] [PATCH v4 1/2] Add libfaketime as a core component of ptxdist for patchin support Roland Hieber
2018-08-08 10:58 ` Jon Ringle
2018-08-08 19:27 ` Jon Ringle
2018-08-27 16:27 ` Michael Olbrich [this message]
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