#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <errno.h> #include <string.h> /* backward compat in case it's not defined */ #ifndef O_TMPFILE #define O_TMPFILE (020000000|O_DIRECTORY) #endif /* * DESCRIPTION: * Verify we can link tmpfile. * * STRATEGY: * 1. open(2) with O_TMPFILE. * 2. linkat(2). * 3. freeze the pool, export and re-import the pool. * 3. stat(2) the path to verify it has been created. * */ int main(int argc, char *argv[]) { int i, fd, ret; char spath[1024], dpath[1024]; char *penv[] = {"TESTDIR", "TESTFILE0"}; struct stat sbuf; (void) fprintf(stdout, "Verify O_TMPFILE file can 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, 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) { perror("linkat"); close(fd); exit(3); } if ((ret = system("sudo zpool freeze $TESTPOOL"))) { if (ret == -1) perror("system \"zpool freeze\""); else fprintf(stderr, "zpool freeze exits with %d\n", WEXITSTATUS(ret)); exit(4); } close(fd); if ((ret = system("sudo zpool export $TESTPOOL"))) { if (ret == -1) perror("system \"zpool export\""); else fprintf(stderr, "zpool export exits with %d\n", WEXITSTATUS(ret)); exit(4); } if ((ret = system("sudo zpool import $TESTPOOL"))) { if (ret == -1) perror("system \"zpool import\""); else fprintf(stderr, "zpool import exits with %d\n", WEXITSTATUS(ret)); exit(4); } if (stat(dpath, &sbuf) < 0) { perror("stat"); unlink(dpath); exit(5); } unlink(dpath); return (0); } |