/** * mnt_context_prepare_mount: * @cxt: context * * Prepare context for mounting, unnecessary for mnt_context_mount(). * * Returns: negative number on error, zero on success */ int mnt_context_prepare_mount(struct libmnt_context *cxt) { int rc = -EINVAL; assert(cxt); assert(cxt->fs); assert(cxt->helper_exec_status == 1); assert(cxt->syscall_status == 1); if (!cxt || !cxt->fs || mnt_fs_is_swaparea(cxt->fs)) return -EINVAL; if (!mnt_fs_get_source(cxt->fs) && !mnt_fs_get_target(cxt->fs)) return -EINVAL; if (cxt->flags & MNT_FL_PREPARED) return 0; cxt->action = MNT_ACT_MOUNT; DBG(CXT, mnt_debug_h(cxt, "mount: preparing")); /* TODO: fstab is unnecessary for MS_{MOVE,BIND,STARED,...} */ rc = mnt_context_apply_fstab(cxt); if (!rc) rc = mnt_context_merge_mflags(cxt); if (!rc) rc = evaluate_permissions(cxt); if (!rc) rc = fix_optstr(cxt); if (!rc) rc = mnt_context_prepare_srcpath(cxt); if (!rc) rc = mnt_context_prepare_target(cxt); if (!rc) rc = mnt_context_guess_fstype(cxt); if (!rc) rc = mnt_context_prepare_helper(cxt, "mount", NULL); if (rc) { DBG(CXT, mnt_debug_h(cxt, "mount: preparing failed")); return rc; } cxt->flags |= MNT_FL_PREPARED; return rc; }
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; /* * The libmount strictly uses only options from fstab if running in * restricted mode (suid, non-root user). This is done in * mnt_context_prepare_mount() by default. * * We have to read fstab before nfsmount.conf, otherwise the options * from nfsmount.conf will be ignored (overwrited). */ rc = mnt_context_apply_fstab(cxt); if (rc) { nfs_error(_("%s: failed to apply fstab options\n"), progname); 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; }