F GETPATH
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(Difference between revisions)
(Created page with "This is untested code... <source lang="c"> #if 0 - →this would be nice...: if (fcntl(fd, F_GETPATH, fname) == -1) { strerror_r(errno, es, ES...") |
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Line 2: | Line 2: | ||
<source lang="c"> | <source lang="c"> | ||
+ | char fname[PATH_MAX]; | ||
#if 0 | #if 0 | ||
− | + | /* this would be nice... */ | |
− | + | if (fcntl(fd, F_GETPATH, fname) == -1) { | |
− | + | strerror_r(errno, es, ES_LEN); | |
− | + | fprintf(stderr, "fcntl(): %s\n", es); | |
− | + | return -1; | |
− | + | } | |
− | #else | + | #else |
− | + | { | |
− | + | const char t[PATH_MAX]; | |
− | + | struct stat a, b; | |
− | + | snprintf(t, sizeof(t), "/proc/self/fd/%d", fd); | |
− | + | if (readlink(t, fname, sizeof(fname)) == -1) { | |
− | + | strerror_r(errno, es, ES_LEN); | |
− | + | fprintf(stderr, "readlink(%s): %s\n", t, es); | |
− | + | return -1; | |
− | + | } | |
− | + | if (stat(fname, &a) == -1) { | |
− | + | strerror_r(errno, es, ES_LEN); | |
− | + | fprintf(stderr, "stat(%s): %s\n", fname, es); | |
− | + | return -1; | |
− | + | } | |
− | + | if (stat(t, &b) == -1) { | |
− | + | strerror_r(errno, es, ES_LEN); | |
− | + | fprintf(stderr, "stat(%s): %s\n", t, es); | |
− | + | return -1; | |
− | + | } | |
− | + | if (a.st_dev != b.st_dev || a.st_ino != b.st_ino) { | |
− | + | fprintf(stderr, "get_db(): tempoary file lost...\n"); | |
− | + | return -1; | |
− | + | } | |
− | + | } | |
#endif | #endif | ||
</source> | </source> |
Revision as of 09:31, 23 December 2013
This is untested code...
char fname[PATH_MAX]; #if 0 /* this would be nice... */ if (fcntl(fd, F_GETPATH, fname) == -1) { strerror_r(errno, es, ES_LEN); fprintf(stderr, "fcntl(): %s\n", es); return -1; } #else { const char t[PATH_MAX]; struct stat a, b; snprintf(t, sizeof(t), "/proc/self/fd/%d", fd); if (readlink(t, fname, sizeof(fname)) == -1) { strerror_r(errno, es, ES_LEN); fprintf(stderr, "readlink(%s): %s\n", t, es); return -1; } if (stat(fname, &a) == -1) { strerror_r(errno, es, ES_LEN); fprintf(stderr, "stat(%s): %s\n", fname, es); return -1; } if (stat(t, &b) == -1) { strerror_r(errno, es, ES_LEN); fprintf(stderr, "stat(%s): %s\n", t, es); return -1; } if (a.st_dev != b.st_dev || a.st_ino != b.st_ino) { fprintf(stderr, "get_db(): tempoary file lost...\n"); return -1; } } #endif