#include #include #include #include #include #include #include #include /* backward compat in case it's not defined */ #ifndef O_TMPFILE #define O_TMPFILE (020000000|O_DIRECTORY) #endif /* * DESCRIPTION: * Verify O_EXCL tmpfile cannot be linked. * * STRATEGY: * 1. open(2) with O_TMPFILE|O_EXCL. * 2. linkat(2). * 3. stat(2) the path to verify it wasn't created. * */ int main(int argc, char *argv[]) { int i, fd; char spath[1024], dpath[1024]; char *penv[] = {"TESTDIR", "TESTFILE0"}; struct stat sbuf; (void) fprintf(stdout, "Verify O_EXCL tmpfile cannot be linked.\n"); /* * Get the environment variable values. */ for (i = 0; i < sizeof (penv) / sizeof (char *); i++) { if ((penv[i] = getenv(penv[i])) == NULL) { (void) fprintf(stderr, "getenv(penv[%d])\n", i); exit(1); } } fd = open(penv[0], O_RDWR|O_TMPFILE|O_EXCL, 0666); if (fd < 0) { perror("open"); exit(2); } snprintf(spath, 1024, "/proc/self/fd/%d", fd); snprintf(dpath, 1024, "%s/%s", penv[0], penv[1]); if (linkat(AT_FDCWD, spath, AT_FDCWD, dpath, AT_SYMLINK_FOLLOW) == 0) { fprintf(stderr, "linkat returns successfully\n"); close(fd); exit(3); } if (stat(dpath, &sbuf) == 0) { fprintf(stderr, "stat returns successfully\n"); close(fd); exit(4); } close(fd); return (0); }