diff options
| -rw-r--r-- | include/usage.h | 4 | ||||
| -rw-r--r-- | scripts/defconfig | 1 | ||||
| -rw-r--r-- | util-linux/Config.in | 8 | ||||
| -rw-r--r-- | util-linux/mount.c | 54 |
4 files changed, 46 insertions, 21 deletions
diff --git a/include/usage.h b/include/usage.h index 59e57f3a0..04ef1822e 100644 --- a/include/usage.h +++ b/include/usage.h @@ -2449,8 +2449,10 @@ USE_FEATURE_BRCTL_FANCY("\n" \ "Mount a filesystem. Filesystem autodetection requires /proc be mounted." \ "\n\nOptions:\n" \ " -a Mount all filesystems in fstab\n" \ + USE_FEATURE_MOUNT_FAKE( \ + " -f "USE_FEATURE_MTAB_SUPPORT("Update /etc/mtab, but ")"don't mount\n" \ + ) \ USE_FEATURE_MTAB_SUPPORT( \ - " -f Update /etc/mtab, but don't mount\n" \ " -n Don't update /etc/mtab\n" \ ) \ " -r Read-only mount\n" \ diff --git a/scripts/defconfig b/scripts/defconfig index 31a172c56..87bc6bd7e 100644 --- a/scripts/defconfig +++ b/scripts/defconfig @@ -478,6 +478,7 @@ CONFIG_MOUNT=y # CONFIG_FEATURE_MOUNT_HELPERS is not set CONFIG_FEATURE_MOUNT_NFS=y CONFIG_FEATURE_MOUNT_CIFS=y +CONFIG_FEATURE_MOUNT_FAKE=y CONFIG_FEATURE_MOUNT_FLAGS=y CONFIG_FEATURE_MOUNT_FSTAB=y CONFIG_PIVOT_ROOT=y diff --git a/util-linux/Config.in b/util-linux/Config.in index d1688e8c9..5a47318fe 100644 --- a/util-linux/Config.in +++ b/util-linux/Config.in @@ -386,6 +386,13 @@ config MOUNT NFS filesystems. Most people using BusyBox will also want to enable the 'mount' utility. +config FEATURE_MOUNT_FAKE + bool "mount -f option" + default n + depends on MOUNT + help + Enable support for faking a file system mount. + config FEATURE_MOUNT_HELPERS bool "Support mount helpers" default n @@ -542,6 +549,7 @@ config FEATURE_MTAB_SUPPORT bool "Support for the old /etc/mtab file" default n depends on MOUNT || UMOUNT + select FEATURE_MOUNT_FAKE help Historically, Unix systems kept track of the currently mounted partitions in the file "/etc/mtab". These days, the kernel exports diff --git a/util-linux/mount.c b/util-linux/mount.c index 5e6c3ba72..dd753235e 100644 --- a/util-linux/mount.c +++ b/util-linux/mount.c @@ -54,6 +54,35 @@ enum { MOUNT_NOAUTO = (1<<29), MOUNT_SWAP = (1<<30), }; + + +#define OPTION_STR "o:t:rwanfvsi" +enum { + OPT_o = (1 << 0), + OPT_t = (1 << 1), + OPT_r = (1 << 2), + OPT_w = (1 << 3), + OPT_a = (1 << 4), + OPT_n = (1 << 5), + OPT_f = (1 << 6), + OPT_v = (1 << 7), + OPT_s = (1 << 8), + OPT_i = (1 << 9), +}; + +#if ENABLE_FEATURE_MTAB_SUPPORT +#define useMtab (!(option_mask32 & OPT_n)) +#else +#define useMtab 0 +#endif + +#if ENABLE_FEATURE_MOUNT_FAKE +#define fakeIt (option_mask32 & OPT_f) +#else +#define fakeIt 0 +#endif + + // TODO: more "user" flag compatibility. // "user" option (from mount manpage): // Only the user that mounted a filesystem can unmount it again. @@ -288,14 +317,6 @@ static void delete_block_backed_filesystems(void) void delete_block_backed_filesystems(void); #endif -#if ENABLE_FEATURE_MTAB_SUPPORT -static int useMtab = 1; -static int fakeIt; -#else -#define useMtab 0 -#define fakeIt 0 -#endif - // Perform actual mount of specific filesystem at specific location. // NB: mp->xxx fields may be trashed on exit static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts) @@ -346,7 +367,7 @@ static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts) /* If the mount was successful, and we're maintaining an old-style * mtab file by hand, add the new entry to it now. */ mtab: - if (ENABLE_FEATURE_MTAB_SUPPORT && useMtab && !rc && !(vfsflags & MS_REMOUNT)) { + if (useMtab && !rc && !(vfsflags & MS_REMOUNT)) { char *fsname; FILE *mountTable = setmntent(bb_path_mtab_file, "a+"); const char *option_str = mount_option_str; @@ -1657,17 +1678,10 @@ int mount_main(int argc, char **argv) // Parse remaining options - opt = getopt32(argv, "o:t:rwanfvsi", &opt_o, &fstype); - if (opt & 0x1) append_mount_options(&cmdopts, opt_o); // -o - //if (opt & 0x2) // -t - if (opt & 0x4) append_mount_options(&cmdopts, "ro"); // -r - if (opt & 0x8) append_mount_options(&cmdopts, "rw"); // -w - //if (opt & 0x10) // -a - if (opt & 0x20) USE_FEATURE_MTAB_SUPPORT(useMtab = 0); // -n - if (opt & 0x40) USE_FEATURE_MTAB_SUPPORT(fakeIt = 1); // -f - //if (opt & 0x80) // -v: verbose (ignore) - //if (opt & 0x100) // -s: sloppy (ignore) - //if (opt & 0x200) // -i: don't call mount.<fstype> (ignore) + opt = getopt32(argv, OPTION_STR, &opt_o, &fstype); + if (opt & OPT_o) append_mount_options(&cmdopts, opt_o); // -o + if (opt & OPT_r) append_mount_options(&cmdopts, "ro"); // -r + if (opt & OPT_w) append_mount_options(&cmdopts, "rw"); // -w argv += optind; argc -= optind; |