--- /dev/null
+/*
+ * umount(8) -- mount a filesystem
+ *
+ * Copyright (C) 2011 Red Hat, Inc. All rights reserved.
+ * Written by Karel Zak <kzak@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include <libmount.h>
+
+#include "nls.h"
+#include "c.h"
+#include "env.h"
+#include "optutils.h"
+
+static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)),
+ const char *filename, int line)
+{
+ if (filename)
+ warnx(_("%s: parse error: ignore entry at line %d."),
+ filename, line);
+ return 0;
+}
+
+static void __attribute__((__noreturn__)) print_version(void)
+{
+ const char *ver = NULL;
+
+ mnt_get_library_version(&ver);
+
+ printf(_("%s from %s (libmount %s)\n"),
+ program_invocation_short_name, PACKAGE_STRING, ver);
+ exit(EXIT_SUCCESS);
+}
+
+static void __attribute__((__noreturn__)) usage(FILE *out)
+{
+ fputs(USAGE_HEADER, out);
+ fprintf(out, _(
+ " %1$s [-hV]\n"
+ " %1$s -a [options]\n"
+ " %1$s [options] <source> | <directory>\n"),
+ program_invocation_short_name);
+
+ fputs(USAGE_OPTIONS, out);
+ fprintf(out, _(
+ " -a, --all mount all filesystems mentioned in fstab\n"
+ " -c, --no-canonicalize don't canonicalize paths\n"
+ " -d, --detach-loop if mounted loop device, also free this loop device\n"
+ " --fake dry run; skip the umount(2) syscall\n"
+ " -f, --force force unmount (in case of an unreachable NFS system)\n"));
+ fprintf(out, _(
+ " -i, --internal-only don't call the umount.<type> helpers\n"
+ " -n, --no-mtab don't write to /etc/mtab\n"
+ " -l, --lazy detach the filesystem now, and cleanup all later\n"));
+ fprintf(out, _(
+ " -O, --test-opts <list> limit the set of filesystems (use with -a)\n"
+ " -r, --read-only In case unmounting fails, try to remount read-only\n"
+ " -t, --types <list> limit the set of filesystem types\n"
+ " -v, --verbose say what is being done\n"));
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(USAGE_HELP, out);
+ fputs(USAGE_VERSION, out);
+ fprintf(out, USAGE_MAN_TAIL("umount(8)"));
+
+ exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+static void __attribute__((__noreturn__)) exit_non_root(const char *option)
+{
+ const uid_t ruid = getuid();
+ const uid_t euid = geteuid();
+
+ if (ruid == 0 && euid != 0) {
+ /* user is root, but setuid to non-root */
+ if (option)
+ errx(EXIT_FAILURE,
+ _("only root can use \"--%s\" option "
+ "(effective UID is %u)"),
+ option, euid);
+ errx(EXIT_FAILURE, _("only root can do that "
+ "(effective UID is %u)"), euid);
+ }
+ if (option)
+ errx(EXIT_FAILURE, _("only root can use \"--%s\" option"), option);
+ errx(EXIT_FAILURE, _("only root can do that"));
+}
+
+static int umount_all(struct libmnt_context *cxt __attribute__((__unused__)))
+{
+ return -1; /* TODO */
+}
+
+static int umount_one(struct libmnt_context *cxt, const char *spec)
+{
+ int rc;
+
+ if (!spec)
+ return -EINVAL;
+
+ if (mnt_context_set_target(cxt, spec))
+ err(EXIT_FAILURE, _("failed to set umount target"));
+
+ rc = mnt_context_umount(cxt);
+ if (rc)
+ /* TODO mnt_context_strerror() */
+ warnx(_("%s: umount failed"), spec);
+
+ mnt_reset_context(cxt);
+ return rc;
+}
+
+int main(int argc, char **argv)
+{
+ int c, rc, all = 0;
+ struct libmnt_context *cxt;
+ char *types = NULL;
+
+ enum {
+ UMOUNT_OPT_FAKE = CHAR_MAX + 1,
+ };
+
+ static const struct option longopts[] = {
+ { "all", 0, 0, 'a' },
+ { "detach-loop", 0, 0, 'd' },
+ { "fake", 0, 0, UMOUNT_OPT_FAKE },
+ { "force", 0, 0, 'f' },
+ { "help", 0, 0, 'h' },
+ { "internal-only", 0, 0, 'i' },
+ { "lazy", 0, 0, 'l' },
+ { "no-canonicalize", 0, 0, 'c' },
+ { "no-mtab", 0, 0, 'n' },
+ { "read-only", 0, 0, 'r' },
+ { "test-opts", 1, 0, 'O' },
+ { "types", 1, 0, 't' },
+ { "verbose", 0, 0, 'v' },
+ { "version", 0, 0, 'V' },
+ { NULL, 0, 0, 0 }
+ };
+
+ sanitize_env();
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+
+ mnt_init_debug(0);
+ cxt = mnt_new_context();
+ if (!cxt)
+ err(EXIT_FAILURE, _("libmount context allocation failed"));
+
+ mnt_context_set_tables_errcb(cxt, table_parser_errcb);
+
+ while ((c = getopt_long(argc, argv, "acdfhilnrO:t:vV",
+ longopts, NULL)) != -1) {
+
+
+ /* only few options are allowed for non-root users */
+ if (mnt_context_is_restricted(cxt) && !strchr("hdilVv", c))
+ exit_non_root(option_to_longopt(c, longopts));
+
+ switch(c) {
+ case 'a':
+ all = 1;
+ break;
+ case 'c':
+ mnt_context_disable_canonicalize(cxt, TRUE);
+ break;
+ case 'd':
+ mnt_context_enable_loopdel(cxt, TRUE);
+ break;
+ case UMOUNT_OPT_FAKE:
+ mnt_context_enable_fake(cxt, TRUE);
+ break;
+ case 'f':
+ mnt_context_enable_force(cxt, TRUE);
+ break;
+ case 'h':
+ usage(stdout);
+ break;
+ case 'i':
+ mnt_context_disable_helpers(cxt, TRUE);
+ break;
+ case 'l':
+ mnt_context_enable_lazy(cxt, TRUE);
+ break;
+ case 'n':
+ mnt_context_disable_mtab(cxt, TRUE);
+ break;
+ case 'r':
+ mnt_context_enable_rdonly_umount(cxt, TRUE);
+ break;
+ case 'O':
+ if (mnt_context_set_options_pattern(cxt, optarg))
+ err(EXIT_FAILURE, _("failed to set options pattern"));
+ break;
+ case 't':
+ types = optarg;
+ break;
+ case 'v':
+ mnt_context_enable_verbose(cxt, TRUE);
+ break;
+ case 'V':
+ print_version();
+ break;
+ default:
+ usage(stderr);
+ break;
+ }
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ if (all) {
+ if (!types)
+ types = "noproc,nodevfs,nodevpts,nosysfs,norpc_pipefs,nonfsd";
+
+ mnt_context_set_fstype_pattern(cxt, types);
+ rc = umount_all(cxt);
+
+ } else if (argc < 1) {
+ usage(stderr);
+
+ } else while (argc--) {
+ rc += umount_one(cxt, *argv++);
+ }
+
+ mnt_free_context(cxt);
+ return rc ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+
projects / thirdparty / util-linux.git / commitdiff
