int main (int argc, char *argv[]) { struct libmnt_fs *fs; struct libmnt_table *tab; mnt_init_debug(0xffff); tab = mnt_new_table_from_file("/proc/self/mounts"); fs = mnt_table_find_target(tab, argv[2], MNT_ITER_BACKWARD); char *source = mnt_fs_get_source(fs); if (strcmp(source, argv[1]) == 0) printf("is mounted\n"); else printf("could not find fs in tab\n"); mnt_free_table(tab); #if 0 int rc; struct libmnt_fs *fs; struct libmnt_context *cxt = mnt_new_context(); mnt_init_debug(0xffff); mnt_context_set_source(cxt, argv[1]); mnt_context_set_target(cxt, argv[2]); fs = mnt_context_get_fs(cxt); if (fs != NULL) { if (mnt_context_is_fs_mounted(cxt, fs, &rc)) rc = 1; else printf("can't find fs in mtab\n"); } else printf("Can't get fs from mnt context\n"); mnt_free_context(cxt); #endif return 0; }
static int mount_main(struct libmnt_context *cxt, int argc, char **argv) { int rc, c; struct libmnt_fs *fs; char *spec = NULL, *mount_point = NULL, *opts = NULL; static const struct option longopts[] = { { "fake", 0, 0, 'f' }, { "help", 0, 0, 'h' }, { "no-mtab", 0, 0, 'n' }, { "read-only", 0, 0, 'r' }, { "ro", 0, 0, 'r' }, { "verbose", 0, 0, 'v' }, { "version", 0, 0, 'V' }, { "read-write", 0, 0, 'w' }, { "rw", 0, 0, 'w' }, { "options", 1, 0, 'o' }, { "sloppy", 0, 0, 's' }, { NULL, 0, 0, 0 } }; mount_config_init(progname); mnt_context_init_helper(cxt, MNT_ACT_MOUNT, 0); while ((c = getopt_long(argc, argv, "fhnrVvwo:s", longopts, NULL)) != -1) { rc = mnt_context_helper_setopt(cxt, c, optarg); if (rc == 0) /* valid option */ continue; if (rc < 0) /* error (probably ENOMEM) */ goto err; /* rc==1 means unknow option */ switch (c) { case 'V': printf("%s: ("PACKAGE_STRING")\n", progname); return EX_SUCCESS; case 'h': default: mount_usage(); return EX_USAGE; } } if (optind < argc) spec = argv[optind++]; if (optind < argc) mount_point = argv[optind++]; if (!mount_point) { nfs_error(_("%s: no mount point provided"), progname); goto err; } if (!spec) { nfs_error(_("%s: no mount spec provided"), progname); goto err; } if (geteuid() != 0) { nfs_error(_("%s: not installed setuid - " "\"user\" NFS mounts not supported."), progname); goto err; } verbose = mnt_context_is_verbose(cxt); sloppy = mnt_context_is_sloppy(cxt); nomtab = mnt_context_is_nomtab(cxt); if (strcmp(progname, "mount.nfs4") == 0) mnt_context_set_fstype(cxt, "nfs4"); else mnt_context_set_fstype(cxt, "nfs"); /* default */ rc = mnt_context_set_source(cxt, spec); if (!rc) mnt_context_set_target(cxt, mount_point); if (rc) { nfs_error(_("%s: failed to set spec or mountpoint: %s"), progname, strerror(errno)); goto err; } mount_point = mnt_resolve_path(mount_point, mnt_context_get_cache(cxt)); if (chk_mountpoint(mount_point)) goto err; /* * Concatenate mount options from the configuration file */ fs = mnt_context_get_fs(cxt); if (fs) { opts = mnt_fs_strdup_options(fs); opts = mount_config_opts(spec, mount_point, opts); mnt_fs_set_options(fs, opts); } rc = mnt_context_prepare_mount(cxt); if (rc) { nfs_error(_("%s: failed to prepare mount: %s\n"), progname, strerror(-rc)); goto err; } rc = try_mount(cxt, FOREGROUND); if (rc == EX_BG) { printf(_("%s: backgrounding \"%s\"\n"), progname, mnt_context_get_source(cxt)); printf(_("%s: mount options: \"%s\"\n"), progname, opts); fflush(stdout); if (daemon(0, 0)) { nfs_error(_("%s: failed to start " "background process: %s\n"), progname, strerror(errno)); exit(EX_FAIL); } rc = try_mount(cxt, BACKGROUND); if (verbose && rc) printf(_("%s: giving up \"%s\"\n"), progname, mnt_context_get_source(cxt)); } mnt_context_set_syscall_status(cxt, rc == EX_SUCCESS ? 0 : -1); mnt_context_finalize_mount(cxt); /* mtab update */ return rc; err: return EX_FAIL; }
static int umount_main(struct libmnt_context *cxt, int argc, char **argv) { int rc, c; char *spec = NULL, *opts = NULL; static const struct option longopts[] = { { "force", 0, 0, 'f' }, { "help", 0, 0, 'h' }, { "no-mtab", 0, 0, 'n' }, { "verbose", 0, 0, 'v' }, { "read-only", 0, 0, 'r' }, { "lazy", 0, 0, 'l' }, { "types", 1, 0, 't' }, { NULL, 0, 0, 0 } }; mnt_context_init_helper(cxt, MNT_ACT_UMOUNT, 0); while ((c = getopt_long (argc, argv, "fvnrlh", longopts, NULL)) != -1) { rc = mnt_context_helper_setopt(cxt, c, optarg); if (rc == 0) /* valid option */ continue; if (rc < 0) /* error (probably ENOMEM) */ goto err; /* rc==1 means unknow option */ umount_usage(); return EX_USAGE; } if (optind < argc) spec = argv[optind++]; if (!spec || (*spec != '/' && strchr(spec,':') == NULL)) { nfs_error(_("%s: no mount point provided"), progname); return EX_USAGE; } if (mnt_context_set_target(cxt, spec)) goto err; if (mnt_context_set_fstype_pattern(cxt, "nfs,nfs4")) /* restrict filesystems */ goto err; /* read mtab/fstab, evaluate permissions, etc. */ rc = mnt_context_prepare_umount(cxt); if (rc) { nfs_error(_("%s: failed to prepare umount: %s\n"), progname, strerror(-rc)); goto err; } opts = retrieve_mount_options(mnt_context_get_fs(cxt)); if (!mnt_context_is_lazy(cxt)) { if (opts) { /* we have full FS description (e.g. from mtab or /proc) */ switch (is_vers4(cxt)) { case 0: /* We ignore the error from nfs_umount23. * If the actual umount succeeds (in del_mtab), * we don't want to signal an error, as that * could cause /sbin/mount to retry! */ nfs_umount23(mnt_context_get_source(cxt), opts); break; case 1: /* unknown */ break; default: /* error */ goto err; } } else /* strange, no entry in mtab or /proc not mounted */ nfs_umount23(spec, "tcp,v3"); } rc = mnt_context_do_umount(cxt); /* call umount(2) syscall */ mnt_context_finalize_mount(cxt); /* mtab update */ if (rc && !mnt_context_get_status(cxt)) { /* mnt_context_do_umount() returns errno if umount(2) failed */ umount_error(rc, spec); goto err; } free(opts); return EX_SUCCESS; err: free(opts); return EX_FAIL; }