diff options
| -rw-r--r-- | include/usage.h | 53 | ||||
| -rw-r--r-- | libbb/match_fstype.c | 36 | ||||
| -rw-r--r-- | util-linux/mount.c | 103 | ||||
| -rw-r--r-- | util-linux/umount.c | 4 |
4 files changed, 136 insertions, 60 deletions
diff --git a/include/usage.h b/include/usage.h index e945840..25a7162 100644 --- a/include/usage.h +++ b/include/usage.h @@ -2796,45 +2796,50 @@ "$ dmesg | more\n" #define mount_trivial_usage \ - "[flags] DEVICE NODE [-o options,more-options]" + "[flags] DEVICE NODE [-o OPT,OPT]" #define mount_full_usage "\n\n" \ "Mount a filesystem. Filesystem autodetection requires /proc be mounted.\n" \ "\nOptions:" \ "\n -a Mount all filesystems in fstab" \ USE_FEATURE_MOUNT_FAKE( \ - "\n -f "USE_FEATURE_MTAB_SUPPORT("Update /etc/mtab, but ")"don't mount" \ + USE_FEATURE_MTAB_SUPPORT( \ + "\n -f Update /etc/mtab, but don't mount" \ + ) \ + SKIP_FEATURE_MTAB_SUPPORT( \ + "\n -f Dry run" \ + ) \ ) \ USE_FEATURE_MTAB_SUPPORT( \ "\n -n Don't update /etc/mtab" \ ) \ "\n -r Read-only mount" \ - "\n -t fs-type Filesystem type" \ "\n -w Read-write mount (default)" \ - "\n" \ - "-o option:\n" \ + "\n -t FSTYPE Filesystem type" \ + "\n -O OPT Mount only filesystems with option OPT (-a only)" \ + "\n-o OPT:" \ USE_FEATURE_MOUNT_LOOP( \ - " loop Ignored (loop devices are autodetected)\n" \ + "\n loop Ignored (loop devices are autodetected)" \ ) \ USE_FEATURE_MOUNT_FLAGS( \ - " [a]sync Writes are asynchronous / synchronous\n" \ - " [no]atime Disable / enable updates to inode access times\n" \ - " [no]diratime Disable / enable atime updates to directories\n" \ - " [no]relatime Disable / enable atime updates relative to modification time\n" \ - " [no]dev Allow use of special device files / disallow them\n" \ - " [no]exec Allow use of executable files / disallow them\n" \ - " [no]suid Allow set-user-id-root programs / disallow them\n" \ - " [r]shared Convert [recursively] to a shared subtree\n" \ - " [r]slave Convert [recursively] to a slave subtree\n" \ - " [r]private Convert [recursively] to a private subtree\n" \ - " [un]bindable Make mount point [un]able to be bind mounted\n" \ - " bind Bind a directory to an additional location\n" \ - " move Relocate an existing mount point\n" \ + "\n [a]sync Writes are [a]synchronous" \ + "\n [no]atime Disable/enable updates to inode access times" \ + "\n [no]diratime Disable/enable atime updates to directories" \ + "\n [no]relatime Disable/enable atime updates relative to modification time" \ + "\n [no]dev (Dis)allow use of special device files" \ + "\n [no]exec (Dis)allow use of executable files" \ + "\n [no]suid (Dis)allow set-user-id-root programs" \ + "\n [r]shared Convert [recursively] to a shared subtree" \ + "\n [r]slave Convert [recursively] to a slave subtree" \ + "\n [r]private Convert [recursively] to a private subtree" \ + "\n [un]bindable Make mount point [un]able to be bind mounted" \ + "\n bind Bind a directory to an additional location" \ + "\n move Relocate an existing mount point" \ ) \ - " remount Remount a mounted filesystem, changing its flags\n" \ - " ro/rw Mount for read-only / read-write\n" \ - "\n" \ - "There are EVEN MORE flags that are specific to each filesystem\n" \ - "You'll have to see the written documentation for those filesystems" \ + "\n remount Remount a mounted filesystem, changing its flags" \ + "\n ro/rw Read-only/read-write mount" \ + "\n" \ + "\nThere are EVEN MORE flags that are specific to each filesystem" \ + "\nYou'll have to see the written documentation for those filesystems" \ #define mount_example_usage \ "$ mount\n" \ diff --git a/libbb/match_fstype.c b/libbb/match_fstype.c index 99e2767..9360e75 100644 --- a/libbb/match_fstype.c +++ b/libbb/match_fstype.c @@ -5,40 +5,38 @@ * This allows us to match fstypes that start with no like so * mount -at ,noddy * - * Returns 0 for a match, otherwise -1 + * Returns 1 for a match, otherwise 0 * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ #include "libbb.h" -int FAST_FUNC match_fstype(const struct mntent *mt, const char *fstype) +int FAST_FUNC match_fstype(const struct mntent *mt, const char *t_fstype) { - int no = 0; + int match = 1; int len; - if (!mt) - return -1; + if (!t_fstype) + return match; - if (!fstype) - return 0; - - if (fstype[0] == 'n' && fstype[1] == 'o') { - no = -1; - fstype += 2; + if (t_fstype[0] == 'n' && t_fstype[1] == 'o') { + match--; + t_fstype += 2; } len = strlen(mt->mnt_type); - while (fstype) { - if (!strncmp(mt->mnt_type, fstype, len) - && (!fstype[len] || fstype[len] == ',') + while (1) { + if (strncmp(mt->mnt_type, t_fstype, len) == 0 + && (t_fstype[len] == '\0' || t_fstype[len] == ',') ) { - return no; + return match; } - fstype = strchr(fstype, ','); - if (fstype) - fstype++; + t_fstype = strchr(t_fstype, ','); + if (!t_fstype) + break; + t_fstype++; } - return -(no + 1); + return !match; } diff --git a/util-linux/mount.c b/util-linux/mount.c index 3b83113..d647c71 100644 --- a/util-linux/mount.c +++ b/util-linux/mount.c @@ -63,7 +63,7 @@ enum { }; -#define OPTION_STR "o:t:rwanfvsi" +#define OPTION_STR "o:t:rwanfvsiO:" enum { OPT_o = (1 << 0), OPT_t = (1 << 1), @@ -75,6 +75,7 @@ enum { OPT_v = (1 << 7), OPT_s = (1 << 8), OPT_i = (1 << 9), + OPT_O = (1 << 10), }; #if ENABLE_FEATURE_MTAB_SUPPORT @@ -1721,6 +1722,45 @@ static int singlemount(struct mntent *mp, int ignore_busy) return rc; } +/* -O support + * Unlike -t, -O should interpret "no" prefix differently: + * -t noa,b,c = -t no(a,b,c) = mount all except fs'es with types a,b, and c + * -O noa,b,c = -O noa,b,c = mount all with without option a, + * or with option b or c. + * But for now we do not support -O a,b,c at all (only -O a). + * + * Another difference from -t support (match_fstype) is that + * we need to examine the _list_ of options in fsopt, not just a string. + */ +static int match_opt(const char *fs_opt, const char *O_opt) +{ + int match = 1; + int len; + + if (!O_opt) + return match; + + if (O_opt[0] == 'n' && O_opt[1] == 'o') { + match--; + O_opt += 2; + } + + len = strlen(O_opt); + while (1) { + if (strncmp(fs_opt, O_opt, len) == 0 + && (fs_opt[len] == '\0' || fs_opt[len] == ',') + ) { + return match; + } + fs_opt = strchr(fs_opt, ','); + if (!fs_opt) + break; + fs_opt++; + } + + return !match; +} + // Parse options, if necessary parse fstab/mtab, and call singlemount for // each directory to be mounted. static const char must_be_root[] ALIGN1 = "you must be root"; @@ -1728,8 +1768,9 @@ static const char must_be_root[] ALIGN1 = "you must be root"; int mount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int mount_main(int argc UNUSED_PARAM, char **argv) { - char *cmdopts = xstrdup(""); + char *cmdopts = xzalloc(1); char *fstype = NULL; + char *O_optmatch = NULL; char *storage_path; llist_t *lst_o = NULL; const char *fstabname; @@ -1752,9 +1793,9 @@ int mount_main(int argc UNUSED_PARAM, char **argv) argv[j] = NULL; // Parse remaining options - // Max 2 params; -v is a counter - opt_complementary = "?2o::" USE_FEATURE_MOUNT_VERBOSE(":vv"); - opt = getopt32(argv, OPTION_STR, &lst_o, &fstype + // Max 2 params; -o is a list, -v is a counter + opt_complementary = "?2o::" USE_FEATURE_MOUNT_VERBOSE("vv"); + opt = getopt32(argv, OPTION_STR, &lst_o, &fstype, &O_optmatch USE_FEATURE_MOUNT_VERBOSE(, &verbose)); while (lst_o) append_mount_options(&cmdopts, llist_pop(&lst_o)); // -o if (opt & OPT_r) append_mount_options(&cmdopts, "ro"); // -r @@ -1807,7 +1848,7 @@ int mount_main(int argc UNUSED_PARAM, char **argv) // Past this point, we are handling either "mount -a [opts]" // or "mount [opts] single_param" - i = parse_mount_options(cmdopts, 0); // FIXME: should be "long", not "int" + i = parse_mount_options(cmdopts, NULL); // FIXME: should be "long", not "int" if (nonroot && (i & ~MS_SILENT)) // Non-root users cannot specify flags bb_error_msg_and_die(must_be_root); @@ -1865,20 +1906,29 @@ int mount_main(int argc UNUSED_PARAM, char **argv) // If we're mounting all } else { - // Do we need to match a filesystem type? - if (fstype && match_fstype(mtcur, fstype)) + // No, mount -a won't mount anything, + // even user mounts, for mere humans + if (nonroot) + bb_error_msg_and_die(must_be_root); + + // Does type match? (NULL matches always) + if (!match_fstype(mtcur, fstype)) continue; // Skip noauto and swap anyway. - if (parse_mount_options(mtcur->mnt_opts, 0) & (MOUNT_NOAUTO | MOUNT_SWAP)) + if ((parse_mount_options(mtcur->mnt_opts, NULL) & (MOUNT_NOAUTO | MOUNT_SWAP)) + // swap is bogus "fstype", parse_mount_options can't check fstypes + || strcasecmp(mtcur->mnt_type, "swap") == 0 + ) { continue; + } - // No, mount -a won't mount anything, - // even user mounts, for mere humans - if (nonroot) - bb_error_msg_and_die(must_be_root); + // Does (at least one) option match? + // (NULL matches always) + if (!match_opt(mtcur->mnt_opts, O_optmatch)) + continue; - resolve_mount_spec(&mtpair->mnt_fsname); + resolve_mount_spec(&mtcur->mnt_fsname); // NFS mounts want this to be xrealloc-able mtcur->mnt_opts = xstrdup(mtcur->mnt_opts); @@ -1895,13 +1945,35 @@ int mount_main(int argc UNUSED_PARAM, char **argv) // End of fstab/mtab is reached. // Were we looking for something specific? if (argv[0]) { + long l; + // If we didn't find anything, complain if (!mtcur->mnt_fsname) bb_error_msg_and_die("can't find %s in %s", argv[0], fstabname); + + // What happens when we try to "mount swap_partition"? + // (fstab containts "swap_partition swap swap defaults 0 0") + // util-linux-ng 2.13.1 does this: + // stat("/sbin/mount.swap", 0x7fff62a3a350) = -1 ENOENT (No such file or directory) + // mount("swap_partition", "swap", "swap", MS_MGC_VAL, NULL) = -1 ENOENT (No such file or directory) + // lstat("swap", 0x7fff62a3a640) = -1 ENOENT (No such file or directory) + // write(2, "mount: mount point swap does not exist\n", 39) = 39 + // exit_group(32) = ? +#if 0 + // In case we want to simply skip swap partitions: + l = parse_mount_options(mtcur->mnt_opts, NULL); + if ((l & MOUNT_SWAP) + // swap is bogus "fstype", parse_mount_options can't check fstypes + || strcasecmp(mtcur->mnt_type, "swap") == 0 + ) { + goto ret; + } +#endif if (nonroot) { // fstab must have "users" or "user" - if (!(parse_mount_options(mtcur->mnt_opts, 0) & MOUNT_USERS)) + l = parse_mount_options(mtcur->mnt_opts, NULL); + if (!(l & MOUNT_USERS)) bb_error_msg_and_die(must_be_root); } @@ -1914,6 +1986,7 @@ int mount_main(int argc UNUSED_PARAM, char **argv) free(mtcur->mnt_opts); } + //ret: if (ENABLE_FEATURE_CLEAN_UP) endmntent(fstab); if (ENABLE_FEATURE_CLEAN_UP) { diff --git a/util-linux/umount.c b/util-linux/umount.c index 901c909..5b22bfa 100644 --- a/util-linux/umount.c +++ b/util-linux/umount.c @@ -73,9 +73,9 @@ int umount_main(int argc UNUSED_PARAM, char **argv) } else { while (getmntent_r(fp, &me, path, PATH_MAX)) { /* Match fstype if passed */ - if (fstype && match_fstype(&me, fstype)) + if (!match_fstype(&me, fstype)) continue; - m = xmalloc(sizeof(struct mtab_list)); + m = xzalloc(sizeof(*m)); m->next = mtl; m->device = xstrdup(me.mnt_fsname); m->dir = xstrdup(me.mnt_dir); |