diff options
Diffstat (limited to 'util-linux/mount.c')
| -rw-r--r-- | util-linux/mount.c | 103 |
1 files changed, 88 insertions, 15 deletions
diff --git a/util-linux/mount.c b/util-linux/mount.c index 3b8311318..d647c71b1 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) { |