diff options
Diffstat (limited to 'sys-utils/mount.c')
| -rw-r--r-- | sys-utils/mount.c | 995 |
1 files changed, 995 insertions, 0 deletions
diff --git a/sys-utils/mount.c b/sys-utils/mount.c new file mode 100644 index 0000000..2d1d2cd --- /dev/null +++ b/sys-utils/mount.c @@ -0,0 +1,995 @@ +/* + * mount(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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <errno.h> +#include <string.h> +#include <getopt.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <stdarg.h> +#include <libmount.h> +#include <ctype.h> + +#include "nls.h" +#include "c.h" +#include "env.h" +#include "strutils.h" +#include "xgetpass.h" +#include "exitcodes.h" +#include "xalloc.h" +#include "closestream.h" + +#define OPTUTILS_EXIT_CODE MOUNT_EX_USAGE +#include "optutils.h" + +/*** TODO: DOCS: + * + * --options-mode={ignore,append,prepend,replace} MNT_OMODE_{IGNORE, ...} + * --options-source={fstab,mtab,disable} MNT_OMODE_{FSTAB,MTAB,NOTAB} + * --options-source-force MNT_OMODE_FORCE + */ + +static int passfd = -1; +static int readwrite; + +static int mk_exit_code(struct libmnt_context *cxt, int rc); + +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(MOUNT_EX_USAGE, _("only root can use \"--%s\" option " + "(effective UID is %u)"), + option, euid); + errx(MOUNT_EX_USAGE, _("only root can do that " + "(effective UID is %u)"), euid); + } + if (option) + errx(MOUNT_EX_USAGE, _("only root can use \"--%s\" option"), option); + errx(MOUNT_EX_USAGE, _("only root can do that")); +} + +static void __attribute__((__noreturn__)) print_version(void) +{ + const char *ver = NULL; + const char **features = NULL, **p; + + mnt_get_library_version(&ver); + mnt_get_library_features(&features); + + printf(_("%s from %s (libmount %s"), + program_invocation_short_name, + PACKAGE_STRING, + ver); + p = features; + while (p && *p) { + fputs(p == features ? ": " : ", ", stdout); + fputs(*p++, stdout); + } + fputs(")\n", stdout); + exit(MOUNT_EX_SUCCESS); +} + +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 char *encrypt_pass_get(struct libmnt_context *cxt) +{ + if (!cxt) + return 0; + +#ifdef MCL_FUTURE + if (mlockall(MCL_CURRENT | MCL_FUTURE)) { + warn(_("couldn't lock into memory")); + return NULL; + } +#endif + return xgetpass(passfd, _("Password: ")); +} + +static void encrypt_pass_release(struct libmnt_context *cxt + __attribute__((__unused__)), char *pwd) +{ + char *p = pwd; + + while (p && *p) + *p++ = '\0'; + + free(pwd); + munlockall(); +} + +/* + * Replace control chars with '?' to be compatible with coreutils. For more + * robust solution use findmnt(1) where we use \x?? hex encoding. + */ +static void safe_fputs(const char *data) +{ + const char *p; + + for (p = data; p && *p; p++) { + if (iscntrl((unsigned char) *p)) + fputc('?', stdout); + else + fputc(*p, stdout); + } +} + +static void print_all(struct libmnt_context *cxt, char *pattern, int show_label) +{ + struct libmnt_table *tb; + struct libmnt_iter *itr = NULL; + struct libmnt_fs *fs; + struct libmnt_cache *cache = NULL; + + if (mnt_context_get_mtab(cxt, &tb)) + err(MOUNT_EX_SYSERR, _("failed to read mtab")); + + itr = mnt_new_iter(MNT_ITER_FORWARD); + if (!itr) + err(MOUNT_EX_SYSERR, _("failed to initialize libmount iterator")); + if (show_label) + cache = mnt_new_cache(); + + while (mnt_table_next_fs(tb, itr, &fs) == 0) { + const char *type = mnt_fs_get_fstype(fs); + const char *src = mnt_fs_get_source(fs); + const char *optstr = mnt_fs_get_options(fs); + char *xsrc = NULL; + + if (type && pattern && !mnt_match_fstype(type, pattern)) + continue; + + if (!mnt_fs_is_pseudofs(fs)) + xsrc = mnt_pretty_path(src, cache); + printf ("%s on ", xsrc ? xsrc : src); + safe_fputs(mnt_fs_get_target(fs)); + + if (type) + printf (" type %s", type); + if (optstr) + printf (" (%s)", optstr); + if (show_label && src) { + char *lb = mnt_cache_find_tag_value(cache, src, "LABEL"); + if (lb) + printf (" [%s]", lb); + } + fputc('\n', stdout); + free(xsrc); + } + + mnt_free_cache(cache); + mnt_free_iter(itr); +} + +/* + * mount -a [-F] + */ +static int mount_all(struct libmnt_context *cxt) +{ + struct libmnt_iter *itr; + struct libmnt_fs *fs; + int mntrc, ignored, rc = MOUNT_EX_SUCCESS; + + int nsucc = 0, nerrs = 0; + + itr = mnt_new_iter(MNT_ITER_FORWARD); + if (!itr) { + warn(_("failed to initialize libmount iterator")); + return MOUNT_EX_SYSERR; + } + + while (mnt_context_next_mount(cxt, itr, &fs, &mntrc, &ignored) == 0) { + + const char *tgt = mnt_fs_get_target(fs); + + if (ignored) { + if (mnt_context_is_verbose(cxt)) + printf(ignored == 1 ? _("%-25s: ignored\n") : + _("%-25s: already mounted\n"), + tgt); + } else if (mnt_context_is_fork(cxt)) { + if (mnt_context_is_verbose(cxt)) + printf("%-25s: mount successfully forked\n", tgt); + } else { + mk_exit_code(cxt, mntrc); /* to print warnings */ + + if (mnt_context_get_status(cxt)) { + nsucc++; + + if (mnt_context_is_verbose(cxt)) + printf("%-25s: successfully mounted\n", tgt); + } else + nerrs++; + } + } + + if (mnt_context_is_parent(cxt)) { + /* wait for mount --fork children */ + int nchildren = 0; + + nerrs = 0, nsucc = 0; + + rc = mnt_context_wait_for_children(cxt, &nchildren, &nerrs); + if (!rc && nchildren) + nsucc = nchildren - nerrs; + } + + if (nerrs == 0) + rc = MOUNT_EX_SUCCESS; /* all success */ + else if (nsucc == 0) + rc = MOUNT_EX_FAIL; /* all failed */ + else + rc = MOUNT_EX_SOMEOK; /* some success, some failed */ + + mnt_free_iter(itr); + return rc; +} + +/* + * Handles generic errors like ENOMEM, ... + * + * rc = 0 success + * <0 error (usually -errno) + * + * Returns exit status (MOUNT_EX_*) and prints error message. + */ +static int handle_generic_errors(int rc, const char *msg, ...) +{ + va_list va; + + va_start(va, msg); + errno = -rc; + + switch(errno) { + case EINVAL: + case EPERM: + vwarn(msg, va); + rc = MOUNT_EX_USAGE; + break; + case ENOMEM: + vwarn(msg, va); + rc = MOUNT_EX_SYSERR; + break; + default: + vwarn(msg, va); + rc = MOUNT_EX_FAIL; + break; + } + va_end(va); + return rc; +} + +#if defined(HAVE_LIBSELINUX) && defined(HAVE_SECURITY_GET_INITIAL_CONTEXT) +#include <selinux/selinux.h> +#include <selinux/context.h> + +static void selinux_warning(struct libmnt_context *cxt, const char *tgt) +{ + + if (tgt && mnt_context_is_verbose(cxt) && is_selinux_enabled() > 0) { + security_context_t raw = NULL, def = NULL; + + if (getfilecon(tgt, &raw) > 0 + && security_get_initial_context("file", &def) == 0) { + + if (!selinux_file_context_cmp(raw, def)) + printf(_( + "mount: %s does not contain SELinux labels.\n" + " You just mounted an file system that supports labels which does not\n" + " contain labels, onto an SELinux box. It is likely that confined\n" + " applications will generate AVC messages and not be allowed access to\n" + " this file system. For more details see restorecon(8) and mount(8).\n"), + tgt); + } + freecon(raw); + freecon(def); + } +} +#else +# define selinux_warning(_x, _y) +#endif + + +/* + * rc = 0 success + * <0 error (usually -errno or -1) + * + * Returns exit status (MOUNT_EX_*) and/or prints error message. + */ +static int mk_exit_code(struct libmnt_context *cxt, int rc) +{ + int syserr; + struct stat st; + unsigned long uflags = 0, mflags = 0; + + int restricted = mnt_context_is_restricted(cxt); + const char *tgt = mnt_context_get_target(cxt); + const char *src = mnt_context_get_source(cxt); + +try_readonly: + if (mnt_context_helper_executed(cxt)) + /* + * /sbin/mount.<type> called, return status + */ + return mnt_context_get_helper_status(cxt); + + if (rc == 0 && mnt_context_get_status(cxt) == 1) { + /* + * Libmount success && syscall success. + */ + selinux_warning(cxt, tgt); + + return MOUNT_EX_SUCCESS; /* mount(2) success */ + } + + mnt_context_get_mflags(cxt, &mflags); /* mount(2) flags */ + mnt_context_get_user_mflags(cxt, &uflags); /* userspace flags */ + + if (!mnt_context_syscall_called(cxt)) { + /* + * libmount errors (extra library checks) + */ + switch (rc) { + case -EPERM: + warnx(_("only root can mount %s on %s"), src, tgt); + return MOUNT_EX_USAGE; + case -EBUSY: + warnx(_("%s is already mounted"), src); + return MOUNT_EX_USAGE; + case -MNT_ERR_NOFSTAB: + if (mnt_context_is_swapmatch(cxt)) { + warnx(_("can't find %s in %s"), + src ? src : tgt, + mnt_get_fstab_path()); + return MOUNT_EX_USAGE; + } + /* source/target explicitly defined */ + if (tgt) + warnx(_("can't find mountpoint %s in %s"), + tgt, mnt_get_fstab_path()); + else + warnx(_("can't find mount source %s in %s"), + src, mnt_get_fstab_path()); + return MOUNT_EX_USAGE; + case -MNT_ERR_NOFSTYPE: + if (restricted) + warnx(_("I could not determine the filesystem type, " + "and none was specified")); + else + warnx(_("you must specify the filesystem type")); + return MOUNT_EX_USAGE; + case -MNT_ERR_NOSOURCE: + if (src) + warnx(_("can't find %s"), src); + else + warnx(_("mount source not defined")); + return MOUNT_EX_USAGE; + case -MNT_ERR_MOUNTOPT: + if (errno) + warn(_("failed to parse mount options")); + else + warnx(_("failed to parse mount options")); + return MOUNT_EX_USAGE; + case -MNT_ERR_LOOPDEV: + if (errno == ENOENT + && (uflags & MNT_MS_ENCRYPTION) + && src && stat(src, &st) == 0) + warnx(_("%s: failed to setup loop device " + "(probably unknown encryption type)"), src); + else + warn(_("%s: failed to setup loop device"), src); + return MOUNT_EX_FAIL; + default: + return handle_generic_errors(rc, _("%s: mount failed"), + tgt ? tgt : src); + } + } else if (mnt_context_get_syscall_errno(cxt) == 0) { + /* + * mount(2) syscall success, but something else failed + * (probably error in mtab processing). + */ + if (rc < 0) + return handle_generic_errors(rc, + _("%s: filesystem mounted, but mount(8) failed"), + tgt ? tgt : src); + + return MOUNT_EX_SOFTWARE; /* internal error */ + + } + + /* + * mount(2) errors + */ + syserr = mnt_context_get_syscall_errno(cxt); + + + switch(syserr) { + case EPERM: + if (geteuid() == 0) { + if (stat(tgt, &st) || !S_ISDIR(st.st_mode)) + warnx(_("mount point %s is not a directory"), tgt); + else + warnx(_("permission denied")); + } else + warnx(_("must be superuser to use mount")); + break; + + case EBUSY: + { + struct libmnt_table *tb; + + if (mflags & MS_REMOUNT) { + warnx(_("%s is busy"), tgt); + break; + } + + warnx(_("%s is already mounted or %s busy"), src, tgt); + + if (src && mnt_context_get_mtab(cxt, &tb) == 0) { + struct libmnt_iter *itr = mnt_new_iter(MNT_ITER_FORWARD); + struct libmnt_fs *fs; + + while(mnt_table_next_fs(tb, itr, &fs) == 0) { + const char *s = mnt_fs_get_srcpath(fs), + *t = mnt_fs_get_target(fs); + + if (t && s && mnt_fs_streq_srcpath(fs, src)) + fprintf(stderr, _( + " %s is already mounted on %s\n"), s, t); + } + mnt_free_iter(itr); + } + break; + } + case ENOENT: + if (lstat(tgt, &st)) + warnx(_("mount point %s does not exist"), tgt); + else if (stat(tgt, &st)) + warnx(_("mount point %s is a symbolic link to nowhere"), tgt); + else if (stat(src, &st)) { + if (uflags & MNT_MS_NOFAIL) + return MOUNT_EX_SUCCESS; + + warnx(_("special device %s does not exist"), src); + } else { + errno = syserr; + warn(_("mount(2) failed")); /* print errno */ + } + break; + + case ENOTDIR: + if (stat(tgt, &st) || ! S_ISDIR(st.st_mode)) + warnx(_("mount point %s is not a directory"), tgt); + else if (stat(src, &st) && errno == ENOTDIR) { + if (uflags & MNT_MS_NOFAIL) + return MOUNT_EX_SUCCESS; + + warnx(_("special device %s does not exist " + "(a path prefix is not a directory)"), src); + } else { + errno = syserr; + warn(_("mount(2) failed")); /* print errno */ + } + break; + + case EINVAL: + if (mflags & MS_REMOUNT) + warnx(_("%s not mounted or bad option"), tgt); + else if (mflags & MS_PROPAGATION) + warnx(_("%s is not mountpoint or bad option"), tgt); + else + warnx(_("wrong fs type, bad option, bad superblock on %s,\n" + " missing codepage or helper program, or other error"), + src); + + if (mnt_fs_is_netfs(mnt_context_get_fs(cxt))) + fprintf(stderr, _( + " (for several filesystems (e.g. nfs, cifs) you might\n" + " need a /sbin/mount.<type> helper program)\n")); + + fprintf(stderr, _( + " In some cases useful info is found in syslog - try\n" + " dmesg | tail or so\n")); + break; + + case EMFILE: + warnx(_("mount table full")); + break; + + case EIO: + warnx(_("%s: can't read superblock"), src); + break; + + case ENODEV: + warnx(_("unknown filesystem type '%s'"), mnt_context_get_fstype(cxt)); + break; + + case ENOTBLK: + if (uflags & MNT_MS_NOFAIL) + return MOUNT_EX_SUCCESS; + + if (stat(src, &st)) + warnx(_("%s is not a block device, and stat(2) fails?"), src); + else if (S_ISBLK(st.st_mode)) + warnx(_("the kernel does not recognize %s as a block device\n" + " (maybe `modprobe driver'?)"), src); + else if (S_ISREG(st.st_mode)) + warnx(_("%s is not a block device (maybe try `-o loop'?)"), src); + else + warnx(_(" %s is not a block device"), src); + break; + + case ENXIO: + if (uflags & MNT_MS_NOFAIL) + return MOUNT_EX_SUCCESS; + + warnx(_("%s is not a valid block device"), src); + break; + + case EACCES: + case EROFS: + if (mflags & MS_RDONLY) + warnx(_("cannot mount %s read-only"), src); + + else if (readwrite) + warnx(_("%s is write-protected but explicit `-w' flag given"), src); + + else if (mflags & MS_REMOUNT) + warnx(_("cannot remount %s read-write, is write-protected"), src); + + else { + warnx(_("%s is write-protected, mounting read-only"), src); + + mnt_context_reset_status(cxt); + mnt_context_set_mflags(cxt, mflags | MS_RDONLY); + rc = mnt_context_do_mount(cxt); + if (!rc) + rc = mnt_context_finalize_mount(cxt); + + goto try_readonly; + } + break; + + case ENOMEDIUM: + warnx(_("no medium found on %s"), src); + break; + + default: + warn(_("mount %s on %s failed"), src, tgt); + break; + } + + return MOUNT_EX_FAIL; +} + +static struct libmnt_table *append_fstab(struct libmnt_context *cxt, + struct libmnt_table *fstab, + const char *path) +{ + + if (!fstab) { + fstab = mnt_new_table(); + if (!fstab) + err(MOUNT_EX_SYSERR, _("failed to initialize libmount table")); + + mnt_table_set_parser_errcb(fstab, table_parser_errcb); + mnt_context_set_fstab(cxt, fstab); + } + + if (mnt_table_parse_fstab(fstab, path)) + errx(MOUNT_EX_USAGE,_("%s: failed to parse"), path); + + return fstab; +} + +static void __attribute__((__noreturn__)) usage(FILE *out) +{ + fputs(USAGE_HEADER, out); + fprintf(out, _( + " %1$s [-lhV]\n" + " %1$s -a [options]\n" + " %1$s [options] [--source] <source> | [--target] <directory>\n" + " %1$s [options] <source> <directory>\n" + " %1$s <operation> <mountpoint> [<target>]\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" + " -f, --fake dry run; skip the mount(2) syscall\n" + " -F, --fork fork off for each device (use with -a)\n" + " -T, --fstab <path> alternative file to /etc/fstab\n")); + fprintf(out, _( + " -h, --help display this help text and exit\n" + " -i, --internal-only don't call the mount.<type> helpers\n" + " -l, --show-labels lists all mounts with LABELs\n" + " -n, --no-mtab don't write to /etc/mtab\n")); + fprintf(out, _( + " -o, --options <list> comma-separated list of mount options\n" + " -O, --test-opts <list> limit the set of filesystems (use with -a)\n" + " -p, --pass-fd <num> read the passphrase from file descriptor\n" + " -r, --read-only mount the filesystem read-only (same as -o ro)\n" + " -t, --types <list> limit the set of filesystem types\n")); + fprintf(out, _( + " --source <src> explicitly specifies source (path, label, uuid)\n" + " --target <target> explicitly specifies mountpoint\n")); + fprintf(out, _( + " -v, --verbose say what is being done\n" + " -V, --version display version information and exit\n" + " -w, --read-write mount the filesystem read-write (default)\n")); + + fputs(USAGE_SEPARATOR, out); + fputs(USAGE_HELP, out); + fputs(USAGE_VERSION, out); + + fprintf(out, _( + "\nSource:\n" + " -L, --label <label> synonym for LABEL=<label>\n" + " -U, --uuid <uuid> synonym for UUID=<uuid>\n" + " LABEL=<label> specifies device by filesystem label\n" + " UUID=<uuid> specifies device by filesystem UUID\n" + " PARTLABEL=<label> specifies device by partition label\n" + " PARTUUID=<uuid> specifies device by partition UUID\n")); + + fprintf(out, _( + " <device> specifies device by path\n" + " <directory> mountpoint for bind mounts (see --bind/rbind)\n" + " <file> regular file for loopdev setup\n")); + + fprintf(out, _( + "\nOperations:\n" + " -B, --bind mount a subtree somewhere else (same as -o bind)\n" + " -M, --move move a subtree to some other place\n" + " -R, --rbind mount a subtree and all submounts somewhere else\n")); + fprintf(out, _( + " --make-shared mark a subtree as shared\n" + " --make-slave mark a subtree as slave\n" + " --make-private mark a subtree as private\n" + " --make-unbindable mark a subtree as unbindable\n")); + fprintf(out, _( + " --make-rshared recursively mark a whole subtree as shared\n" + " --make-rslave recursively mark a whole subtree as slave\n" + " --make-rprivate recursively mark a whole subtree as private\n" + " --make-runbindable recursively mark a whole subtree as unbindable\n")); + + fprintf(out, USAGE_MAN_TAIL("mount(8)")); + + exit(out == stderr ? MOUNT_EX_USAGE : MOUNT_EX_SUCCESS); +} + +int main(int argc, char **argv) +{ + int c, rc = MOUNT_EX_SUCCESS, all = 0, show_labels = 0; + struct libmnt_context *cxt; + struct libmnt_table *fstab = NULL; + char *srcbuf = NULL; + char *types = NULL; + unsigned long oper = 0; + + enum { + MOUNT_OPT_SHARED = CHAR_MAX + 1, + MOUNT_OPT_SLAVE, + MOUNT_OPT_PRIVATE, + MOUNT_OPT_UNBINDABLE, + MOUNT_OPT_RSHARED, + MOUNT_OPT_RSLAVE, + MOUNT_OPT_RPRIVATE, + MOUNT_OPT_RUNBINDABLE, + MOUNT_OPT_TARGET, + MOUNT_OPT_SOURCE + }; + + static const struct option longopts[] = { + { "all", 0, 0, 'a' }, + { "fake", 0, 0, 'f' }, + { "fstab", 1, 0, 'T' }, + { "fork", 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' }, + { "test-opts", 1, 0, 'O' }, + { "pass-fd", 1, 0, 'p' }, + { "types", 1, 0, 't' }, + { "uuid", 1, 0, 'U' }, + { "label", 1, 0, 'L'}, + { "bind", 0, 0, 'B' }, + { "move", 0, 0, 'M' }, + { "rbind", 0, 0, 'R' }, + { "make-shared", 0, 0, MOUNT_OPT_SHARED }, + { "make-slave", 0, 0, MOUNT_OPT_SLAVE }, + { "make-private", 0, 0, MOUNT_OPT_PRIVATE }, + { "make-unbindable", 0, 0, MOUNT_OPT_UNBINDABLE }, + { "make-rshared", 0, 0, MOUNT_OPT_RSHARED }, + { "make-rslave", 0, 0, MOUNT_OPT_RSLAVE }, + { "make-rprivate", 0, 0, MOUNT_OPT_RPRIVATE }, + { "make-runbindable", 0, 0, MOUNT_OPT_RUNBINDABLE }, + { "no-canonicalize", 0, 0, 'c' }, + { "internal-only", 0, 0, 'i' }, + { "show-labels", 0, 0, 'l' }, + { "target", 1, 0, MOUNT_OPT_TARGET }, + { "source", 1, 0, MOUNT_OPT_SOURCE }, + { NULL, 0, 0, 0 } + }; + + static const ul_excl_t excl[] = { /* rows and cols in in ASCII order */ + { 'B','M','R', /* bind,move,rbind */ + MOUNT_OPT_SHARED, MOUNT_OPT_SLAVE, + MOUNT_OPT_PRIVATE, MOUNT_OPT_UNBINDABLE, + MOUNT_OPT_RSHARED, MOUNT_OPT_RSLAVE, + MOUNT_OPT_RPRIVATE, MOUNT_OPT_RUNBINDABLE }, + + { 'L','U', MOUNT_OPT_SOURCE }, /* label,uuid,source */ + { 0 } + }; + int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT; + + sanitize_env(); + setlocale(LC_ALL, ""); + bindtextdomain(PACKAGE, LOCALEDIR); + textdomain(PACKAGE); + atexit(close_stdout); + + mnt_init_debug(0); + cxt = mnt_new_context(); + if (!cxt) + err(MOUNT_EX_SYSERR, _("libmount context allocation failed")); + + mnt_context_set_tables_errcb(cxt, table_parser_errcb); + + while ((c = getopt_long(argc, argv, "aBcfFhilL:Mno:O:p:rRsU:vVwt:T:", + longopts, NULL)) != -1) { + + /* only few options are allowed for non-root users */ + if (mnt_context_is_restricted(cxt) && + !strchr("hlLUVvpris", c) && + c != MOUNT_OPT_TARGET && + c != MOUNT_OPT_SOURCE) + exit_non_root(option_to_longopt(c, longopts)); + + err_exclusive_options(c, longopts, excl, excl_st); + + switch(c) { + case 'a': + all = 1; + break; + case 'c': + mnt_context_disable_canonicalize(cxt, TRUE); + break; + case 'f': + mnt_context_enable_fake(cxt, TRUE); + break; + case 'F': + mnt_context_enable_fork(cxt, TRUE); + break; + case 'h': + usage(stdout); + break; + case 'i': + mnt_context_disable_helpers(cxt, TRUE); + break; + case 'n': + mnt_context_disable_mtab(cxt, TRUE); + break; + case 'r': + if (mnt_context_append_options(cxt, "ro")) + err(MOUNT_EX_SYSERR, _("failed to append options")); + readwrite = 0; + break; + case 'v': + mnt_context_enable_verbose(cxt, TRUE); + break; + case 'V': + print_version(); + break; + case 'w': + if (mnt_context_append_options(cxt, "rw")) + err(MOUNT_EX_SYSERR, _("failed to append options")); + readwrite = 1; + break; + case 'o': + if (mnt_context_append_options(cxt, optarg)) + err(MOUNT_EX_SYSERR, _("failed to append options")); + break; + case 'O': + if (mnt_context_set_options_pattern(cxt, optarg)) + err(MOUNT_EX_SYSERR, _("failed to set options pattern")); + break; + case 'p': + passfd = strtou32_or_err(optarg, + _("invalid passphrase file descriptor")); + break; + case 'L': + xasprintf(&srcbuf, "LABEL=\"%s\"", optarg); + mnt_context_disable_swapmatch(cxt, 1); + mnt_context_set_source(cxt, srcbuf); + free(srcbuf); + break; + case 'U': + xasprintf(&srcbuf, "UUID=\"%s\"", optarg); + mnt_context_disable_swapmatch(cxt, 1); + mnt_context_set_source(cxt, srcbuf); + free(srcbuf); + break; + case 'l': + show_labels = 1; + break; + case 't': + types = optarg; + break; + case 'T': + fstab = append_fstab(cxt, fstab, optarg); + break; + case 's': + mnt_context_enable_sloppy(cxt, TRUE); + break; + case 'B': + oper |= MS_BIND; + break; + case 'M': + oper |= MS_MOVE; + break; + case 'R': + oper |= (MS_BIND | MS_REC); + break; + case MOUNT_OPT_SHARED: + oper |= MS_SHARED; + break; + case MOUNT_OPT_SLAVE: + oper |= MS_SLAVE; + break; + case MOUNT_OPT_PRIVATE: + oper |= MS_PRIVATE; + break; + case MOUNT_OPT_UNBINDABLE: + oper |= MS_UNBINDABLE; + break; + case MOUNT_OPT_RSHARED: + oper |= (MS_SHARED | MS_REC); + break; + case MOUNT_OPT_RSLAVE: + oper |= (MS_SLAVE | MS_REC); + break; + case MOUNT_OPT_RPRIVATE: + oper |= (MS_PRIVATE | MS_REC); + break; + case MOUNT_OPT_RUNBINDABLE: + oper |= (MS_UNBINDABLE | MS_REC); + break; + case MOUNT_OPT_TARGET: + mnt_context_disable_swapmatch(cxt, 1); + mnt_context_set_target(cxt, optarg); + break; + case MOUNT_OPT_SOURCE: + mnt_context_disable_swapmatch(cxt, 1); + mnt_context_set_source(cxt, optarg); + break; + default: + usage(stderr); + break; + } + } + + argc -= optind; + argv += optind; + + if (!mnt_context_get_source(cxt) && + !mnt_context_get_target(cxt) && + !argc && + !all) { + if (oper) + usage(stderr); + print_all(cxt, types, show_labels); + goto done; + } + + if (oper && (types || all || mnt_context_get_source(cxt))) + usage(stderr); + + if (types && (all || strchr(types, ',') || + strncmp(types, "no", 2) == 0)) + mnt_context_set_fstype_pattern(cxt, types); + else if (types) + mnt_context_set_fstype(cxt, types); + + mnt_context_set_passwd_cb(cxt, encrypt_pass_get, encrypt_pass_release); + + if (all) { + /* + * A) Mount all + */ + rc = mount_all(cxt); + goto done; + + } else if (argc == 0 && (mnt_context_get_source(cxt) || + mnt_context_get_target(cxt))) { + /* + * B) mount -L|-U|--source|--target + */ + if (mnt_context_is_restricted(cxt) && + mnt_context_get_source(cxt) && + mnt_context_get_target(cxt)) + exit_non_root(NULL); + + } else if (argc == 1) { + /* + * C) mount [-L|-U|--source] <target> + * mount <source|target> + * + * non-root may specify source *or* target, but not both + */ + if (mnt_context_is_restricted(cxt) && + mnt_context_get_source(cxt)) + exit_non_root(NULL); + + mnt_context_set_target(cxt, argv[0]); + + } else if (argc == 2 && !mnt_context_get_source(cxt) + && !mnt_context_get_target(cxt)) { + /* + * D) mount <source> <target> + */ + if (mnt_context_is_restricted(cxt)) + exit_non_root(NULL); + mnt_context_set_source(cxt, argv[0]); + mnt_context_set_target(cxt, argv[1]); + + } else + usage(stderr); + + if (oper) { + /* MS_PROPAGATION operations, let's set the mount flags */ + mnt_context_set_mflags(cxt, oper); + + /* For -make* or --bind is fstab unnecessary */ + mnt_context_set_optsmode(cxt, MNT_OMODE_NOTAB); + } + + rc = mnt_context_mount(cxt); + rc = mk_exit_code(cxt, rc); + +done: + mnt_free_context(cxt); + mnt_free_table(fstab); + return rc; +} + |