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yangfl
059bfd7806
For filesystems without high-resolution time support, an usleep() is too short to alter mtime. Though 1s is quite safe, sleep for 2s in case it gets awaken right within that second.
93 lines
1.8 KiB
C
93 lines
1.8 KiB
C
/* test of touch(), touchf(), erase(), and erasef() */
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#include <err.h>
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#include <paths.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <time.h>
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#include "check.h"
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#define FMT "%s-bar"
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int verbose = 0;
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static int mtime(char *file)
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{
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int ret;
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char buf[80];
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struct stat before, after;
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PRINT("Calling touch() to create file ...\n");
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touch(file);
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stat(file, &before);
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/* Must sleep a while here otherwise we execute too fast => no mtime change :-( */
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sleep(2);
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PRINT("Calling touch() again to update mtime ...\n");
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if (touch(file)) {
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erase(file);
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err(1, "Failed creating %s", file);
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}
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stat(file, &after);
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ret = timespec_newer(&after.st_mtim, &before.st_mtim);
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PRINT("Before: %s\n", timespec2str(&before.st_mtim, buf, sizeof(buf)));
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PRINT("After : %s\n", timespec2str(&after.st_mtim, buf, sizeof(buf)));
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erase(file);
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return !ret;
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}
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static int formatted(char *file)
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{
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char vrfy[80];
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if (touchf(FMT, file))
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err(1, "Failed creating " FMT, file);
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PRINT("Created " FMT "\n", file);
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snprintf(vrfy, sizeof(vrfy), FMT, file);
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if (!fexist(vrfy))
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errx(1, "touchf() does not detect failure to create file " FMT, file);
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PRINT("File " FMT " really does exist!\n", file);
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erasef(FMT, file);
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if (fexist(vrfy)) {
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int saved = errno;
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erase(vrfy);
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errno = saved;
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errx(1, "erasef() failed removing the created file " FMT, file);
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}
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return 0;
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}
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int main(int argc, char *argv[])
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{
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int fd;
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char file[42] = "/tmp/touch_test.XXXXXX";
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if (argc > 1 && !strcmp(argv[1], "-v"))
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verbose = 1;
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fd = mkstemp(file);
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if (fd < 0)
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err(1, "Failed creating tempfile, %s", file);
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close(fd);
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return mtime(file) || formatted(file);
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}
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* compile-command: "make touch && ./touch -v"
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* End:
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*/
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