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Use -DFAKE_FILE_TIMESTAMPS to intercept utime[s](), by @speq, #183

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This commit is contained in:
Wolfgang Hommel
2019-12-14 21:49:23 +01:00
parent b3dcef470e
commit 78385ba8b7
1 changed files with 75 additions and 0 deletions
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75
src/libfaketime.c
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@@ -110,6 +110,13 @@ typedef int clockid_t;
#define CLOCK_MONOTONIC_RAW (CLOCK_MONOTONIC + 1)
#endif
#ifdef FAKE_FILE_TIMESTAMPS
struct utimbuf {
time_t actime; /* access time */
time_t modtime; /* modification time */
};
#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
@@ -200,6 +207,11 @@ static int apple_clock_gettime (clockid_t clk_id, struct timespec *
static clock_serv_t clock_serv_real;
#endif
#ifdef FAKE_FILE_TIMESTAMPS
static int (*real_utimes) (const char *filename, const struct timeval times[2]);
static int (*real_utime) (const char *filename, const struct utimbuf *times);
#endif
static int initialized = 0;
/* prototypes */
@@ -1032,6 +1044,65 @@ int __lxstat64 (int ver, const char *path, struct stat64 *buf)
}
#endif
#ifdef FAKE_FILE_TIMESTAMPS
int utime(const char *filename, const struct utimbuf *times)
{
if (!initialized)
{
ftpl_init();
}
if (NULL == real_utime)
{ /* dlsym() failed */
#ifdef DEBUG
(void) fprintf(stderr, "faketime problem: original utime() not found.\n");
#endif
return -1; /* propagate error to caller */
}
int result;
struct utimbuf ntbuf;
ntbuf.actime = times->actime - user_offset.tv_sec;
ntbuf.modtime = times->modtime - user_offset.tv_sec;
DONT_FAKE_TIME(result = real_utime(filename, &ntbuf));
if (result == -1)
{
return -1;
}
return result;
}
int utimes(const char *filename, const struct timeval times[2])
{
if (!initialized)
{
ftpl_init();
}
if (NULL == real_utimes)
{ /* dlsym() failed */
#ifdef DEBUG
(void) fprintf(stderr, "faketime problem: original utimes() not found.\n");
#endif
return -1; /* propagate error to caller */
}
int result;
struct timeval tn[2];
struct timeval user_offset2;
user_offset2.tv_sec = user_offset.tv_sec;
user_offset2.tv_usec = 0;
timersub(&times[0], &user_offset2, &tn[0]);
timersub(&times[1], &user_offset2, &tn[1]);
DONT_FAKE_TIME(result = real_utimes(filename, tn));
if (result == -1)
{
return -1;
}
return result;
}
#endif
/*
* =======================================================================
* Faked system functions: sleep/alarm/poll/timer related === FAKE(SLEEP)
@@ -2173,6 +2244,10 @@ static void ftpl_init(void)
real_lstat64 = dlsym(RTLD_NEXT, "__lxstat64");
real_time = dlsym(RTLD_NEXT, "time");
real_ftime = dlsym(RTLD_NEXT, "ftime");
#ifdef FAKE_FILE_TIMESTAMPS
real_utimes = dlsym(RTLD_NEXT, "utimes");
real_utime = dlsym(RTLD_NEXT, "utime");
#endif
#if defined(__alpha__) && defined(__GLIBC__)
real_gettimeofday = dlvsym(RTLD_NEXT, "gettimeofday", "GLIBC_2.1");
#else