* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-/* todo:
- * bb_getopt_ulflags();
- */
-
/* Design notes: There is no spec for mount. Remind me to write one.
mount_main() calls singlemount() which calls mount_it_now().
// Not real flags, but we want to be able to check for this.
-#define MOUNT_NOAUTO (1<<29)
-#define MOUNT_SWAP (1<<30)
+enum {
+ MOUNT_USERS = (1<<28)*ENABLE_DESKTOP,
+ MOUNT_NOAUTO = (1<<29),
+ MOUNT_SWAP = (1<<30),
+};
+// TODO: more "user" flag compatibility.
+// "user" option (from mount manpage):
+// Only the user that mounted a filesystem can unmount it again.
+// If any user should be able to unmount, then use users instead of user
+// in the fstab line. The owner option is similar to the user option,
+// with the restriction that the user must be the owner of the special file.
+// This may be useful e.g. for /dev/fd if a login script makes
+// the console user owner of this device.
/* Standard mount options (from -o options or --options), with corresponding
* flags */
USE_FEATURE_MOUNT_FSTAB(
{"defaults", 0},
{"quiet", 0},
- {"noauto",MOUNT_NOAUTO},
- {"swap",MOUNT_SWAP},
+ {"noauto", MOUNT_NOAUTO},
+ {"swap", MOUNT_SWAP},
+ USE_DESKTOP({"user", MOUNT_USERS},)
+ USE_DESKTOP({"users", MOUNT_USERS},)
)
USE_FEATURE_MOUNT_FLAGS(
{"remount", MS_REMOUNT}, // action flag
};
-
+#define VECTOR_SIZE(v) (sizeof(v) / sizeof((v)[0]))
/* Append mount options to string */
static void append_mount_options(char **oldopts, char *newopts)
if (p) len = p - newopts;
p = *oldopts;
while (1) {
- if (!strncmp(p,newopts,len) && (p[len]==',' || p[len]==0))
+ if (!strncmp(p, newopts, len)
+ && (p[len]==',' || p[len]==0))
goto skip;
p = strchr(p,',');
if(!p) break;
if (comma) *comma = 0;
// Find this option in mount_options
- for (i = 0; i < (sizeof(mount_options) / sizeof(*mount_options)); i++) {
+ for (i = 0; i < VECTOR_SIZE(mount_options); i++) {
if (!strcasecmp(mount_options[i].name, options)) {
long fl = mount_options[i].flags;
if (fl < 0) flags &= fl;
}
}
// If unrecognized not NULL, append unrecognized mount options */
- if (unrecognized
- && i == (sizeof(mount_options) / sizeof(*mount_options)))
- {
+ if (unrecognized && i == VECTOR_SIZE(mount_options)) {
// Add it to strflags, to pass on to kernel
i = *unrecognized ? strlen(*unrecognized) : 0;
*unrecognized = xrealloc(*unrecognized, i+strlen(options)+2);
static llist_t *get_block_backed_filesystems(void)
{
- char *fs, *buf,
- *filesystems[] = {"/etc/filesystems", "/proc/filesystems", 0};
+ static const char *const filesystems[] = {
+ "/etc/filesystems",
+ "/proc/filesystems",
+ 0
+ };
+ char *fs, *buf;
llist_t *list = 0;
int i;
FILE *f;
f = fopen(filesystems[i], "r");
if (!f) continue;
- for (fs = buf = 0; (fs = buf = bb_get_chomped_line_from_file(f));
- free(buf))
- {
- if (!strncmp(buf,"nodev",5) && isspace(buf[5])) continue;
-
- while (isspace(*fs)) fs++;
- if (*fs=='#' || *fs=='*') continue;
- if (!*fs) continue;
+ while ((buf = xmalloc_getline(f)) != 0) {
+ if (!strncmp(buf, "nodev", 5) && isspace(buf[5]))
+ continue;
+ fs = skip_whitespace(buf);
+ if (*fs=='#' || *fs=='*' || !*fs) continue;
- llist_add_to_end(&list,xstrdup(fs));
+ llist_add_to_end(&list, xstrdup(fs));
+ free(buf);
}
if (ENABLE_FEATURE_CLEAN_UP) fclose(f);
}
static int useMtab = 1;
static int fakeIt;
#else
-enum {
- useMtab = 0,
- fakeIt = 0,
-};
+#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)
{
- int rc;
+ int rc = 0;
- if (fakeIt) return 0;
+ if (fakeIt) goto mtab;
// Mount, with fallback to read-only if necessary.
/* 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)) {
char *fsname;
FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
int i;
- if (!mountTable)
+ if (!mountTable) {
bb_error_msg("no %s",bb_path_mtab_file);
+ goto ret;
+ }
// Add vfs string flags
free(fsname);
}
}
-
+ ret:
return rc;
}
p.pm_vers = version;
p.pm_prot = proto;
p.pm_port = port;
-
+
while (pmap) {
if (pmap->pml_map.pm_prog != prog)
goto next;
dup2(fd, 2);
if (fd > 2) close(fd);
setsid();
- openlog(bb_applet_name, LOG_PID, LOG_DAEMON);
+ openlog(applet_name, LOG_PID, LOG_DAEMON);
logmode = LOGMODE_SYSLOG;
return 1;
}
* error_msg_rpc(clnt_*error*(" ")) */
static void error_msg_rpc(const char *msg)
{
- size_t len;
+ int len;
while (msg[0] == ' ' || msg[0] == ':') msg++;
len = strlen(msg);
while (len && msg[len-1] == '\n') len--;
for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) {
char *opteq = strchr(opt, '=');
if (opteq) {
- int val = atoi(opteq + 1);
+ const char *const options[] = {
+ /* 0 */ "rsize",
+ /* 1 */ "wsize",
+ /* 2 */ "timeo",
+ /* 3 */ "retrans",
+ /* 4 */ "acregmin",
+ /* 5 */ "acregmax",
+ /* 6 */ "acdirmin",
+ /* 7 */ "acdirmax",
+ /* 8 */ "actimeo",
+ /* 9 */ "retry",
+ /* 10 */ "port",
+ /* 11 */ "mountport",
+ /* 12 */ "mounthost",
+ /* 13 */ "mountprog",
+ /* 14 */ "mountvers",
+ /* 15 */ "nfsprog",
+ /* 16 */ "nfsvers",
+ /* 17 */ "vers",
+ /* 18 */ "proto",
+ /* 19 */ "namlen",
+ /* 20 */ "addr",
+ NULL
+ };
+ int val = xatoi_u(opteq + 1);
*opteq = '\0';
- if (!strcmp(opt, "rsize"))
+ switch (index_in_str_array(options, opt)) {
+ case 0: // "rsize"
data.rsize = val;
- else if (!strcmp(opt, "wsize"))
+ break;
+ case 1: // "wsize"
data.wsize = val;
- else if (!strcmp(opt, "timeo"))
+ break;
+ case 2: // "timeo"
data.timeo = val;
- else if (!strcmp(opt, "retrans"))
+ break;
+ case 3: // "retrans"
data.retrans = val;
- else if (!strcmp(opt, "acregmin"))
+ break;
+ case 4: // "acregmin"
data.acregmin = val;
- else if (!strcmp(opt, "acregmax"))
+ break;
+ case 5: // "acregmax"
data.acregmax = val;
- else if (!strcmp(opt, "acdirmin"))
+ break;
+ case 6: // "acdirmin"
data.acdirmin = val;
- else if (!strcmp(opt, "acdirmax"))
+ break;
+ case 7: // "acdirmax"
data.acdirmax = val;
- else if (!strcmp(opt, "actimeo")) {
+ break;
+ case 8: // "actimeo"
data.acregmin = val;
data.acregmax = val;
data.acdirmin = val;
data.acdirmax = val;
- }
- else if (!strcmp(opt, "retry"))
+ break;
+ case 9: // "retry"
retry = val;
- else if (!strcmp(opt, "port"))
+ break;
+ case 10: // "port"
port = val;
- else if (!strcmp(opt, "mountport"))
+ break;
+ case 11: // "mountport"
mountport = val;
- else if (!strcmp(opt, "mounthost"))
+ break;
+ case 12: // "mounthost"
mounthost = xstrndup(opteq+1,
- strcspn(opteq+1," \t\n\r,"));
- else if (!strcmp(opt, "mountprog"))
+ strcspn(opteq+1," \t\n\r,"));
+ break;
+ case 13: // "mountprog"
mountprog = val;
- else if (!strcmp(opt, "mountvers"))
+ break;
+ case 14: // "mountvers"
mountvers = val;
- else if (!strcmp(opt, "nfsprog"))
+ break;
+ case 15: // "nfsprog"
nfsprog = val;
- else if (!strcmp(opt, "nfsvers") ||
- !strcmp(opt, "vers"))
+ break;
+ case 16: // "nfsvers"
+ case 17: // "vers"
nfsvers = val;
- else if (!strcmp(opt, "proto")) {
+ break;
+ case 18: // "proto"
if (!strncmp(opteq+1, "tcp", 3))
tcp = 1;
else if (!strncmp(opteq+1, "udp", 3))
tcp = 0;
else
bb_error_msg("warning: unrecognized proto= option");
- } else if (!strcmp(opt, "namlen")) {
+ break;
+ case 19: // "namlen"
if (nfs_mount_version >= 2)
data.namlen = val;
else
bb_error_msg("warning: option namlen is not supported\n");
- } else if (!strcmp(opt, "addr"))
- /* ignore */;
- else {
+ break;
+ case 20: // "addr" - ignore
+ break;
+ default:
bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val);
goto fail;
}
}
else {
+ const char *const options[] = {
+ "bg",
+ "fg",
+ "soft",
+ "hard",
+ "intr",
+ "posix",
+ "cto",
+ "ac",
+ "tcp",
+ "udp",
+ "lock",
+ NULL
+ };
int val = 1;
if (!strncmp(opt, "no", 2)) {
val = 0;
opt += 2;
}
- if (!strcmp(opt, "bg"))
+ switch (index_in_str_array(options, opt)) {
+ case 0: // "bg"
bg = val;
- else if (!strcmp(opt, "fg"))
+ break;
+ case 1: // "fg"
bg = !val;
- else if (!strcmp(opt, "soft"))
+ break;
+ case 2: // "soft"
soft = val;
- else if (!strcmp(opt, "hard"))
+ break;
+ case 3: // "hard"
soft = !val;
- else if (!strcmp(opt, "intr"))
+ break;
+ case 4: // "intr"
intr = val;
- else if (!strcmp(opt, "posix"))
+ break;
+ case 5: // "posix"
posix = val;
- else if (!strcmp(opt, "cto"))
+ break;
+ case 6: // "cto"
nocto = !val;
- else if (!strcmp(opt, "ac"))
+ break;
+ case 7: // "ac"
noac = !val;
- else if (!strcmp(opt, "tcp"))
+ break;
+ case 8: // "tcp"
tcp = val;
- else if (!strcmp(opt, "udp"))
+ break;
+ case 9: // "udp"
tcp = !val;
- else if (!strcmp(opt, "lock")) {
+ break;
+ case 10: // "lock"
if (nfs_mount_version >= 3)
nolock = !val;
else
bb_error_msg("warning: option nolock is not supported");
- } else {
+ break;
+ default:
bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt);
goto fail;
}
s = strrchr(mp->mnt_fsname, '\\');
if (s == mp->mnt_fsname+1) goto report_error;
*s = 0;
- he = gethostbyname(mp->mnt_fsname+2);
+ he = gethostbyname(mp->mnt_fsname+2);
*s = '\\';
if (!he) goto report_error;
// Parse options, if necessary parse fstab/mtab, and call singlemount for
// each directory to be mounted.
+const char must_be_root[] = "you must be root";
+
int mount_main(int argc, char **argv)
{
- enum { OPT_ALL = 0x8 };
+ enum { OPT_ALL = 0x10 };
char *cmdopts = xstrdup(""), *fstype=0, *storage_path=0;
- char *opt_o, *fstabname;
+ char *opt_o;
+ const char *fstabname;
FILE *fstab;
int i, j, rc = 0;
- unsigned long opt;
+ unsigned opt;
struct mntent mtpair[2], *mtcur = mtpair;
+ SKIP_DESKTOP(const int nonroot = 0;)
+ USE_DESKTOP( int nonroot = (getuid() != 0);)
/* parse long options, like --bind and --move. Note that -o option
* and --option are synonymous. Yes, this means --remount,rw works. */
for (i = j = 0; i < argc; i++) {
if (argv[i][0] == '-' && argv[i][1] == '-') {
- append_mount_options(&cmdopts,argv[i]+2);
+ append_mount_options(&cmdopts, argv[i]+2);
} else argv[j++] = argv[i];
}
+ argv[j] = 0;
argc = j;
// Parse remaining options
- opt = bb_getopt_ulflags(argc, argv, "o:t:rwavnf", &opt_o, &fstype);
- if (opt & 1) // -o
- append_mount_options(&cmdopts, opt_o);
- //if (opt & 1) // -t
- if (opt & 2) // -r
- append_mount_options(&cmdopts, "ro");
- if (opt & 4) // -w
- append_mount_options(&cmdopts, "rw");
- //if (opt & 8) // -a
- if (opt & 0x10) // -n
- USE_FEATURE_MTAB_SUPPORT(useMtab = FALSE);
- if (opt & 0x20) // -f
- USE_FEATURE_MTAB_SUPPORT(fakeIt = FALSE);
- //if (opt & 0x40) // ignore -v
+ opt = getopt32(argc, argv, "o:t:rwanfvs", &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)
argv += optind;
argc -= optind;
if (!(opt & OPT_ALL)) {
FILE *mountTable = setmntent(bb_path_mtab_file, "r");
- if (!mountTable) bb_error_msg_and_die("no %s",bb_path_mtab_file);
+ if (!mountTable) bb_error_msg_and_die("no %s", bb_path_mtab_file);
- while (getmntent_r(mountTable,mtpair,bb_common_bufsiz1,
+ while (getmntent_r(mountTable, mtpair, bb_common_bufsiz1,
sizeof(bb_common_bufsiz1)))
{
- // Don't show rootfs.
+ // Don't show rootfs. FIXME: why??
if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
if (!fstype || !strcmp(mtpair->mnt_type, fstype))
// argument when we get it.
if (argc == 2) {
+ if (nonroot)
+ bb_error_msg_and_die(must_be_root);
mtpair->mnt_fsname = argv[0];
mtpair->mnt_dir = argv[1];
mtpair->mnt_type = fstype;
goto clean_up;
}
+ i = parse_mount_options(cmdopts, 0);
+ if (nonroot && (i & ~MS_SILENT)) // Non-root users cannot specify flags
+ bb_error_msg_and_die(must_be_root);
+
// If we have a shared subtree flag, don't worry about fstab or mtab.
- i = parse_mount_options(cmdopts,0);
+
if (ENABLE_FEATURE_MOUNT_FLAGS &&
- (i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE )))
+ (i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE)))
{
rc = mount("", argv[0], "", i, "");
if (rc) bb_perror_msg_and_die("%s", argv[0]);
goto clean_up;
}
-
+
// Open either fstab or mtab
- if (parse_mount_options(cmdopts,0) & MS_REMOUNT)
+ fstabname = "/etc/fstab";
+ if (i & MS_REMOUNT) {
fstabname = bb_path_mtab_file;
- else fstabname="/etc/fstab";
-
- fstab = setmntent(fstabname,"r");
+ }
+ fstab = setmntent(fstabname, "r");
if (!fstab)
- bb_perror_msg_and_die("cannot read %s",fstabname);
+ bb_perror_msg_and_die("cannot read %s", fstabname);
// Loop through entries until we find what we're looking for.
- memset(mtpair,0,sizeof(mtpair));
+ memset(mtpair, 0, sizeof(mtpair));
for (;;) {
struct mntent *mtnext = (mtcur==mtpair ? mtpair+1 : mtpair);
bb_error_msg_and_die("can't find %s in %s",
argv[0], fstabname);
+ mtcur = mtnext;
+ if (nonroot) {
+ // fstab must have "users" or "user"
+ if (!(parse_mount_options(mtcur->mnt_opts, 0) & MOUNT_USERS))
+ bb_error_msg_and_die(must_be_root);
+ }
+
// Mount the last thing we found.
- mtcur = mtnext;
mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
- append_mount_options(&(mtcur->mnt_opts),cmdopts);
+ append_mount_options(&(mtcur->mnt_opts), cmdopts);
rc = singlemount(mtcur, 0);
free(mtcur->mnt_opts);
}
// Is this what we're looking for?
- if (strcmp(argv[0],mtcur->mnt_fsname) &&
- strcmp(storage_path,mtcur->mnt_fsname) &&
- strcmp(argv[0],mtcur->mnt_dir) &&
- strcmp(storage_path,mtcur->mnt_dir)) continue;
+ if (strcmp(argv[0], mtcur->mnt_fsname) &&
+ strcmp(storage_path, mtcur->mnt_fsname) &&
+ strcmp(argv[0], mtcur->mnt_dir) &&
+ strcmp(storage_path, mtcur->mnt_dir)) continue;
// Remember this entry. Something later may have overmounted
// it, and we want the _last_ match.
// If we're mounting all.
} else {
-
// Do we need to match a filesystem type?
- if (fstype && strcmp(mtcur->mnt_type,fstype)) continue;
+ // TODO: support "-t type1,type2"; "-t notype1,type2"
+
+ if (fstype && strcmp(mtcur->mnt_type, fstype)) continue;
// Skip noauto and swap anyway.
- if (parse_mount_options(mtcur->mnt_opts,0)
+ if (parse_mount_options(mtcur->mnt_opts, 0)
& (MOUNT_NOAUTO | MOUNT_SWAP)) continue;
+ // No, mount -a won't mount anything,
+ // even user mounts, for mere humans.
+
+ if (nonroot)
+ bb_error_msg_and_die(must_be_root);
+
// Mount this thing.
if (singlemount(mtcur, 1)) {
projects / oweals / busybox.git / blobdiff