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| author | Rob Landley | 2010-11-01 00:43:34 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2010-11-01 00:43:34 +0100 |
| commit | 2658888c78b572f349f326dce499930fa4418b4e (patch) | |
| tree | f7a8733c225fb0eb1f2c8b6e2b274b8c1c80f541 /util-linux/umount.c | |
| parent | 66be9197a5111d0293732f4823d1711ccab51675 (diff) | |
| download | busybox-2658888c78b572f349f326dce499930fa4418b4e.zip busybox-2658888c78b572f349f326dce499930fa4418b4e.tar.gz | |
umount: cleanup and code shrink
Signed-off-by: Rob Landley <rob@landley.net>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'util-linux/umount.c')
| -rw-r--r-- | util-linux/umount.c | 47 |
1 files changed, 7 insertions, 40 deletions
diff --git a/util-linux/umount.c b/util-linux/umount.c index 78c6038..5597d9e 100644 --- a/util-linux/umount.c +++ b/util-linux/umount.c @@ -9,39 +9,10 @@ */ #include <mntent.h> #include <sys/mount.h> -/* Make sure we have all the new mount flags we actually try to use. */ -#ifndef MS_BIND -# define MS_BIND (1 << 12) -#endif -#ifndef MS_MOVE -# define MS_MOVE (1 << 13) -#endif -#ifndef MS_RECURSIVE -# define MS_RECURSIVE (1 << 14) -#endif -#ifndef MS_SILENT -# define MS_SILENT (1 << 15) -#endif -/* The shared subtree stuff, which went in around 2.6.15. */ -#ifndef MS_UNBINDABLE -# define MS_UNBINDABLE (1 << 17) -#endif -#ifndef MS_PRIVATE -# define MS_PRIVATE (1 << 18) -#endif -#ifndef MS_SLAVE -# define MS_SLAVE (1 << 19) -#endif -#ifndef MS_SHARED -# define MS_SHARED (1 << 20) -#endif -#ifndef MS_RELATIME -# define MS_RELATIME (1 << 21) -#endif #include "libbb.h" - #if defined(__dietlibc__) +// TODO: This does not belong here. /* 16.12.2006, Sampo Kellomaki (sampo@iki.fi) * dietlibc-0.30 does not have implementation of getmntent_r() */ static struct mntent *getmntent_r(FILE* stream, struct mntent* result, @@ -54,23 +25,17 @@ static struct mntent *getmntent_r(FILE* stream, struct mntent* result, /* ignored: -v -d -t -i */ #define OPTION_STRING "fldnra" "vdt:i" -#define OPT_FORCE (1 << 0) -#define OPT_LAZY (1 << 1) +#define OPT_FORCE (1 << 0) // Same as MNT_FORCE +#define OPT_LAZY (1 << 1) // Same as MNT_DETACH #define OPT_FREELOOP (1 << 2) #define OPT_NO_MTAB (1 << 3) #define OPT_REMOUNT (1 << 4) #define OPT_ALL (ENABLE_FEATURE_UMOUNT_ALL ? (1 << 5) : 0) -// These constants from linux/fs.h must match OPT_FORCE and OPT_LAZY, -// otherwise "doForce" trick below won't work! -//#define MNT_FORCE 0x00000001 /* Attempt to forcibly umount */ -//#define MNT_DETACH 0x00000002 /* Just detach from the tree */ - int umount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int umount_main(int argc UNUSED_PARAM, char **argv) { int doForce; - char *const buf = xmalloc(4096); /* reducing stack usage */ struct mntent me; FILE *fp; char *fstype = NULL; @@ -85,6 +50,9 @@ int umount_main(int argc UNUSED_PARAM, char **argv) opt = getopt32(argv, OPTION_STRING, &fstype); //argc -= optind; argv += optind; + + // MNT_FORCE and MNT_DETACH (from linux/fs.h) must match + // OPT_FORCE and OPT_LAZY, otherwise this trick won't work: doForce = MAX((opt & OPT_FORCE), (opt & OPT_LAZY)); /* Get a list of mount points from mtab. We read them all in now mostly @@ -101,7 +69,7 @@ int umount_main(int argc UNUSED_PARAM, char **argv) if (opt & OPT_ALL) bb_error_msg_and_die("can't open '%s'", bb_path_mtab_file); } else { - while (getmntent_r(fp, &me, buf, 4096)) { + while (getmntent_r(fp, &me, bb_common_bufsiz1, sizeof(bb_common_bufsiz1))) { /* Match fstype if passed */ if (!match_fstype(&me, fstype)) continue; @@ -203,7 +171,6 @@ int umount_main(int argc UNUSED_PARAM, char **argv) free(mtl); mtl = m; } - free(buf); } return status; |