X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-stat-time.c;h=34520a108f331cda7ddeca4d52f9a2a0f98a801a;hb=08998910dd73aad59b78886ab01ab96f7d1e9c38;hp=0289531789c69c69a8859071dc2679216d1f8727;hpb=e220635fc952c63b533873f2af39ec76aed4b4e3;p=gnulib.git diff --git a/tests/test-stat-time.c b/tests/test-stat-time.c index 028953178..34520a108 100644 --- a/tests/test-stat-time.c +++ b/tests/test-stat-time.c @@ -1,5 +1,5 @@ /* Test of . - Copyright (C) 2007-2008 Free Software Foundation, Inc. + Copyright (C) 2007-2012 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -22,34 +22,31 @@ #include #include -#include -#include #include #include -#define ASSERT(expr) \ - do \ - { \ - if (!(expr)) \ - { \ - fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \ - fflush (stderr); \ - abort (); \ - } \ - } \ - while (0) +#include "macros.h" enum { NFILES = 4 }; +static int +force_unlink (const char *filename) +{ + /* This chmod is necessary on mingw, where unlink() of a read-only file + fails with EPERM. */ + chmod (filename, 0600); + return unlink (filename); +} + static void cleanup (int sig) { /* Remove temporary files. */ - unlink ("t-stt-stamp1"); - unlink ("t-stt-testfile"); - unlink ("t-stt-stamp2"); - unlink ("t-stt-renamed"); - unlink ("t-stt-stamp3"); + force_unlink ("t-stt-stamp1"); + force_unlink ("t-stt-testfile"); + force_unlink ("t-stt-stamp2"); + force_unlink ("t-stt-renamed"); + force_unlink ("t-stt-stamp3"); if (sig != 0) _exit (1); @@ -82,19 +79,61 @@ do_stat (const char *filename, struct stat *p) ASSERT (stat (filename, p) == 0); } +/* Sleep long enough to notice a timestamp difference on the file + system in the current directory. */ +static void +nap (void) +{ + static long delay; + if (!delay) + { + /* Initialize only once, by sleeping for 20 milliseconds (needed + since xfs has a quantization of about 10 milliseconds, even + though it has a granularity of 1 nanosecond, and since NTFS + has a default quantization of 15.25 milliseconds, even though + it has a granularity of 100 nanoseconds). If the seconds + differ, repeat the test one more time (in case we crossed a + quantization boundary on a file system with 1 second + resolution). If we can't observe a difference in only the + nanoseconds, then fall back to 1 second if the time is odd, + and 2 seconds (needed for FAT) if time is even. */ + struct stat st1; + struct stat st2; + ASSERT (stat ("t-stt-stamp1", &st1) == 0); + ASSERT (force_unlink ("t-stt-stamp1") == 0); + delay = 20000; + usleep (delay); + create_file ("t-stt-stamp1"); + ASSERT (stat ("t-stt-stamp1", &st2) == 0); + if (st1.st_mtime != st2.st_mtime) + { + /* Seconds differ, give it one more shot. */ + st1 = st2; + ASSERT (force_unlink ("t-stt-stamp1") == 0); + usleep (delay); + create_file ("t-stt-stamp1"); + ASSERT (stat ("t-stt-stamp1", &st2) == 0); + } + if (! (st1.st_mtime == st2.st_mtime + && get_stat_mtime_ns (&st1) < get_stat_mtime_ns (&st2))) + delay = (st1.st_mtime & 1) ? 1000000 : 2000000; + } + usleep (delay); +} + static void prepare_test (struct stat *statinfo, struct timespec *modtimes) { int i; create_file ("t-stt-stamp1"); - sleep (2); + nap (); create_file ("t-stt-testfile"); - sleep (2); + nap (); create_file ("t-stt-stamp2"); - sleep (2); + nap (); ASSERT (chmod ("t-stt-testfile", 0400) == 0); - sleep (2); + nap (); create_file ("t-stt-stamp3"); do_stat ("t-stt-stamp1", &statinfo[0]); @@ -115,13 +154,26 @@ test_mtime (const struct stat *statinfo, struct timespec *modtimes) int i; /* Use the struct stat fields directly. */ - ASSERT (statinfo[0].st_mtime < statinfo[2].st_mtime); /* mtime(stamp1) < mtime(stamp2) */ - ASSERT (statinfo[2].st_mtime < statinfo[3].st_mtime); /* mtime(stamp2) < mtime(stamp3) */ - ASSERT (statinfo[2].st_mtime < statinfo[1].st_ctime); /* mtime(stamp2) < ctime(renamed) */ + /* mtime(stamp1) < mtime(stamp2) */ + ASSERT (statinfo[0].st_mtime < statinfo[2].st_mtime + || (statinfo[0].st_mtime == statinfo[2].st_mtime + && (get_stat_mtime_ns (&statinfo[0]) + < get_stat_mtime_ns (&statinfo[2])))); + /* mtime(stamp2) < mtime(stamp3) */ + ASSERT (statinfo[2].st_mtime < statinfo[3].st_mtime + || (statinfo[2].st_mtime == statinfo[3].st_mtime + && (get_stat_mtime_ns (&statinfo[2]) + < get_stat_mtime_ns (&statinfo[3])))); /* Now check the result of the access functions. */ - ASSERT (modtimes[0].tv_sec < modtimes[2].tv_sec); /* mtime(stamp1) < mtime(stamp2) */ - ASSERT (modtimes[2].tv_sec < modtimes[3].tv_sec); /* mtime(stamp2) < mtime(stamp3) */ + /* mtime(stamp1) < mtime(stamp2) */ + ASSERT (modtimes[0].tv_sec < modtimes[2].tv_sec + || (modtimes[0].tv_sec == modtimes[2].tv_sec + && modtimes[0].tv_nsec < modtimes[2].tv_nsec)); + /* mtime(stamp2) < mtime(stamp3) */ + ASSERT (modtimes[2].tv_sec < modtimes[3].tv_sec + || (modtimes[2].tv_sec == modtimes[3].tv_sec + && modtimes[2].tv_nsec < modtimes[3].tv_nsec)); /* verify equivalence */ for (i = 0; i < NFILES; ++i) @@ -130,31 +182,58 @@ test_mtime (const struct stat *statinfo, struct timespec *modtimes) ts = get_stat_mtime (&statinfo[i]); ASSERT (ts.tv_sec == statinfo[i].st_mtime); } +} - ASSERT (statinfo[2].st_mtime < statinfo[1].st_ctime); /* mtime(stamp2) < ctime(renamed) */ +#if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__ +/* Skip the ctime tests on native Windows platforms, because their + st_ctime is either the same as st_mtime (plus or minus an offset) + or set to the file _creation_ time, and is not influenced by rename + or chmod. */ +# define test_ctime(ignored) ((void) 0) +#else +static void +test_ctime (const struct stat *statinfo) +{ + /* On some buggy NFS clients, mtime and ctime are disproportionately + skewed from one another. Skip this test in that case. */ + if (statinfo[0].st_mtime != statinfo[0].st_ctime) + return; + + /* mtime(stamp2) < ctime(renamed) */ + ASSERT (statinfo[2].st_mtime < statinfo[1].st_ctime + || (statinfo[2].st_mtime == statinfo[1].st_ctime + && (get_stat_mtime_ns (&statinfo[2]) + < get_stat_ctime_ns (&statinfo[1])))); } +#endif static void test_birthtime (const struct stat *statinfo, - const struct timespec *modtimes, - struct timespec *birthtimes) + const struct timespec *modtimes, + struct timespec *birthtimes) { int i; - /* Collect the birth times.. */ + /* Collect the birth times. */ for (i = 0; i < NFILES; ++i) { birthtimes[i] = get_stat_birthtime (&statinfo[i]); if (birthtimes[i].tv_nsec < 0) - return; + return; } - ASSERT (modtimes[0].tv_sec < birthtimes[1].tv_sec); /* mtime(stamp1) < birthtime(renamed) */ - ASSERT (birthtimes[1].tv_sec < modtimes[2].tv_sec); /* birthtime(renamed) < mtime(stamp2) */ + /* mtime(stamp1) < birthtime(renamed) */ + ASSERT (modtimes[0].tv_sec < birthtimes[1].tv_sec + || (modtimes[0].tv_sec == birthtimes[1].tv_sec + && modtimes[0].tv_nsec < birthtimes[1].tv_nsec)); + /* birthtime(renamed) < mtime(stamp2) */ + ASSERT (birthtimes[1].tv_sec < modtimes[2].tv_sec + || (birthtimes[1].tv_sec == modtimes[2].tv_sec + && birthtimes[1].tv_nsec < modtimes[2].tv_nsec)); } int -main () +main (void) { struct stat statinfo[NFILES]; struct timespec modtimes[NFILES]; @@ -176,6 +255,7 @@ main () cleanup (0); prepare_test (statinfo, modtimes); test_mtime (statinfo, modtimes); + test_ctime (statinfo); test_birthtime (statinfo, modtimes, birthtimes); cleanup (0);