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-rw-r--r--util-linux/mount.c138
1 files changed, 58 insertions, 80 deletions
diff --git a/util-linux/mount.c b/util-linux/mount.c
index 313521a..175328f 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -9,14 +9,14 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-/* Design notes: There is no spec for mount. Remind me to write one.
-
- mount_main() calls singlemount() which calls mount_it_now().
-
- mount_main() can loop through /etc/fstab for mount -a
- singlemount() can loop through /etc/filesystems for fstype detection.
- mount_it_now() does the actual mount.
-*/
+// Design notes: There is no spec for mount. Remind me to write one.
+//
+// mount_main() calls singlemount() which calls mount_it_now().
+//
+// mount_main() can loop through /etc/fstab for mount -a
+// singlemount() can loop through /etc/filesystems for fstype detection.
+// mount_it_now() does the actual mount.
+//
#include <mntent.h>
#include <syslog.h>
@@ -26,7 +26,7 @@
#include "volume_id.h"
#endif
-/* Needed for nfs support only */
+// Needed for nfs support only
#include <sys/utsname.h>
#undef TRUE
#undef FALSE
@@ -37,15 +37,15 @@
#ifndef MS_SILENT
#define MS_SILENT (1 << 15)
#endif
-/* Grab more as needed from util-linux's mount/mount_constants.h */
+// Grab more as needed from util-linux's mount/mount_constants.h
#ifndef MS_DIRSYNC
-#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
+#define MS_DIRSYNC 128 // Directory modifications are synchronous
#endif
#if defined(__dietlibc__)
-/* 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
- * dietlibc-0.30 does not have implementation of getmntent_r() */
+// 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,
char* buffer UNUSED_PARAM, int bufsize UNUSED_PARAM)
{
@@ -99,9 +99,8 @@ enum {
// 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 */
-
+// Standard mount options (from -o options or --options),
+// with corresponding flags
static const int32_t mount_options[] = {
// MS_FLAGS set a bit. ~MS_FLAGS disable that bit. 0 flags are NOPs.
@@ -166,7 +165,7 @@ static const char mount_option_str[] =
)
USE_FEATURE_MOUNT_FSTAB(
"defaults" "\0"
- /* "quiet" "\0" - do not filter out, vfat wants to see it */
+ // "quiet" "\0" - do not filter out, vfat wants to see it
"noauto" "\0"
"sw" "\0"
"swap" "\0"
@@ -275,11 +274,11 @@ static int resolve_mount_spec(char **fsname)
return 0;
}
-/* Append mount options to string */
+// Append mount options to string
static void append_mount_options(char **oldopts, const char *newopts)
{
if (*oldopts && **oldopts) {
- /* do not insert options which are already there */
+ // Do not insert options which are already there
while (newopts[0]) {
char *p;
int len = strlen(newopts);
@@ -307,8 +306,8 @@ static void append_mount_options(char **oldopts, const char *newopts)
}
}
-/* Use the mount_options list to parse options into flags.
- * Also return list of unrecognized options if unrecognized!=NULL */
+// Use the mount_options list to parse options into flags.
+// Also return list of unrecognized options if unrecognized != NULL
static long parse_mount_options(char *options, char **unrecognized)
{
long flags = MS_SILENT;
@@ -321,7 +320,7 @@ static long parse_mount_options(char *options, char **unrecognized)
if (comma) *comma = '\0';
-/* FIXME: use hasmntopt() */
+// FIXME: use hasmntopt()
// Find this option in mount_options
for (i = 0; i < ARRAY_SIZE(mount_options); i++) {
if (!strcasecmp(option_str, options)) {
@@ -332,7 +331,7 @@ static long parse_mount_options(char *options, char **unrecognized)
}
option_str += strlen(option_str) + 1;
}
- // If unrecognized not NULL, append unrecognized mount options */
+ // If unrecognized not NULL, append unrecognized mount options
if (unrecognized && i == ARRAY_SIZE(mount_options)) {
// Add it to strflags, to pass on to kernel
i = *unrecognized ? strlen(*unrecognized) : 0;
@@ -354,7 +353,6 @@ static long parse_mount_options(char *options, char **unrecognized)
}
// Return a list of all block device backed filesystems
-
static llist_t *get_block_backed_filesystems(void)
{
static const char filesystems[2][sizeof("/proc/filesystems")] = {
@@ -448,8 +446,8 @@ static int mount_it_now(struct mntent *mp, long vfsflags, char *filteropts)
if (rc && errno == EPERM)
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
- /* If the mount was successful, and we're maintaining an old-style
- * mtab file by hand, add the new entry to it now. */
+ // 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 (useMtab && !rc && !(vfsflags & MS_REMOUNT)) {
char *fsname;
@@ -479,7 +477,7 @@ static int mount_it_now(struct mntent *mp, long vfsflags, char *filteropts)
mp->mnt_dir = bb_simplify_path(mp->mnt_dir);
fsname = 0;
- if (!mp->mnt_type || !*mp->mnt_type) { /* bind mount */
+ if (!mp->mnt_type || !*mp->mnt_type) { // bind mount
mp->mnt_fsname = fsname = bb_simplify_path(mp->mnt_fsname);
mp->mnt_type = (char*)"bind";
}
@@ -723,8 +721,7 @@ enum {
#define EDQUOT ENOSPC
#endif
-// Convert each NFSERR_BLAH into EBLAH
-
+/* Convert each NFSERR_BLAH into EBLAH */
static const struct {
short stat;
short errnum;
@@ -734,7 +731,6 @@ static const struct {
{28,ENOSPC}, {30,EROFS}, {63,ENAMETOOLONG}, {66,ENOTEMPTY}, {69,EDQUOT},
{70,ESTALE}, {71,EREMOTE}, {-1,EIO}
};
-
static char *nfs_strerror(int status)
{
int i;
@@ -920,7 +916,7 @@ static int daemonize(void)
static inline int daemonize(void) { return -ENOSYS; }
#endif
-// TODO
+/* TODO */
static inline int we_saw_this_host_before(const char *hostname UNUSED_PARAM)
{
return 0;
@@ -939,7 +935,7 @@ static void error_msg_rpc(const char *msg)
bb_error_msg("%.*s", len, msg);
}
-// NB: mp->xxx fields may be trashed on exit
+/* NB: mp->xxx fields may be trashed on exit */
static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
{
CLIENT *mclient;
@@ -1290,7 +1286,7 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
}
}
- /* create mount daemon client */
+ /* Create mount daemon client */
/* See if the nfs host = mount host. */
if (mounthost) {
if (mounthost[0] >= '0' && mounthost[0] <= '9') {
@@ -1336,12 +1332,12 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
retry_timeout.tv_usec = 0;
total_timeout.tv_sec = 20;
total_timeout.tv_usec = 0;
-//FIXME: use monotonic()?
+/* FIXME: use monotonic()? */
timeout = time(NULL) + 60 * retry;
prevt = 0;
t = 30;
retry:
- /* be careful not to use too many CPU cycles */
+ /* Be careful not to use too many CPU cycles */
if (t - prevt < 30)
sleep(30);
@@ -1381,10 +1377,11 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
error_msg_rpc(clnt_spcreateerror(" "));
} else {
enum clnt_stat clnt_stat;
- /* try to mount hostname:pathname */
+
+ /* Try to mount hostname:pathname */
mclient->cl_auth = authunix_create_default();
- /* make pointers in xdr_mountres3 NULL so
+ /* Make pointers in xdr_mountres3 NULL so
* that xdr_array allocates memory for us
*/
memset(&status, 0, sizeof(status));
@@ -1421,7 +1418,6 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
}
/* Timeout. We are going to retry... maybe */
-
if (!bg)
goto fail;
if (!daemonized) {
@@ -1475,8 +1471,7 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
data.flags |= NFS_MOUNT_VER3;
}
- /* create nfs socket for kernel */
-
+ /* Create nfs socket for kernel */
if (tcp) {
if (nfs_mount_version < 3) {
bb_error_msg("NFS over TCP is not supported");
@@ -1502,14 +1497,12 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
}
server_addr.sin_port = htons(port);
- /* prepare data structure for kernel */
-
+ /* Prepare data structure for kernel */
data.fd = fsock;
memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
strncpy(data.hostname, hostname, sizeof(data.hostname));
- /* clean up */
-
+ /* Clean up */
auth_destroy(mclient->cl_auth);
clnt_destroy(mclient);
close(msock);
@@ -1523,7 +1516,7 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
if (!daemonized) {
daemonized = daemonize();
if (daemonized <= 0) { /* parent or error */
-// FIXME: parent doesn't close fsock - ??!
+/* FIXME: parent doesn't close fsock - ??! */
retval = -daemonized;
goto ret;
}
@@ -1535,14 +1528,14 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
}
}
- do_mount: /* perform actual mount */
-
+ /* Perform actual mount */
+ do_mount:
mp->mnt_type = (char*)"nfs";
retval = mount_it_now(mp, vfsflags, (char*)&data);
goto ret;
- fail: /* abort */
-
+ /* Abort */
+ fail:
if (msock >= 0) {
if (mclient) {
auth_destroy(mclient->cl_auth);
@@ -1560,12 +1553,12 @@ static int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
return retval;
}
-#else /* !ENABLE_FEATURE_MOUNT_NFS */
+#else // !ENABLE_FEATURE_MOUNT_NFS
-/* Never called. Call should be optimized out. */
+// Never called. Call should be optimized out.
int nfsmount(struct mntent *mp, long vfsflags, char *filteropts);
-#endif /* !ENABLE_FEATURE_MOUNT_NFS */
+#endif // !ENABLE_FEATURE_MOUNT_NFS
// Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem
// type detection. Returns 0 for success, nonzero for failure.
@@ -1580,13 +1573,11 @@ static int singlemount(struct mntent *mp, int ignore_busy)
vfsflags = parse_mount_options(mp->mnt_opts, &filteropts);
- // Treat fstype "auto" as unspecified.
-
+ // Treat fstype "auto" as unspecified
if (mp->mnt_type && strcmp(mp->mnt_type, "auto") == 0)
mp->mnt_type = NULL;
// Might this be a virtual filesystem?
-
if (ENABLE_FEATURE_MOUNT_HELPERS
&& (strchr(mp->mnt_fsname, '#'))
) {
@@ -1609,7 +1600,6 @@ static int singlemount(struct mntent *mp, int ignore_busy)
}
// Might this be an CIFS filesystem?
-
if (ENABLE_FEATURE_MOUNT_CIFS
&& (!mp->mnt_type || strcmp(mp->mnt_type, "cifs") == 0)
&& (mp->mnt_fsname[0] == '/' || mp->mnt_fsname[0] == '\\')
@@ -1621,12 +1611,10 @@ static int singlemount(struct mntent *mp, int ignore_busy)
rc = 1;
// Replace '/' with '\' and verify that unc points to "//server/share".
-
for (s = mp->mnt_fsname; *s; ++s)
if (*s == '/') *s = '\\';
- // get server IP
-
+ // Get server IP
s = strrchr(mp->mnt_fsname, '\\');
if (s <= mp->mnt_fsname+1) goto report_error;
*s = '\0';
@@ -1634,18 +1622,16 @@ static int singlemount(struct mntent *mp, int ignore_busy)
*s = '\\';
if (!lsa) goto report_error;
- // insert ip=... option into string flags.
-
+ // Insert ip=... option into string flags.
dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
ip = xasprintf("ip=%s", dotted);
parse_mount_options(ip, &filteropts);
- // compose new unc '\\server-ip\share'
+ // Compose new unc '\\server-ip\share'
// (s => slash after hostname)
-
mp->mnt_fsname = xasprintf("\\\\%s%s", dotted, s);
- // lock is required
+ // Lock is required
vfsflags |= MS_MANDLOCK;
mp->mnt_type = (char*)"cifs";
@@ -1660,7 +1646,6 @@ static int singlemount(struct mntent *mp, int ignore_busy)
}
// Might this be an NFS filesystem?
-
if (ENABLE_FEATURE_MOUNT_NFS
&& (!mp->mnt_type || !strcmp(mp->mnt_type, "nfs"))
&& strchr(mp->mnt_fsname, ':') != NULL
@@ -1673,15 +1658,13 @@ static int singlemount(struct mntent *mp, int ignore_busy)
// a synthetic filesystem like proc or sysfs.)
// (We use stat, not lstat, in order to allow
// mount symlink_to_file_or_blkdev dir)
-
if (!stat(mp->mnt_fsname, &st)
&& !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))
) {
// Do we need to allocate a loopback device for it?
-
if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
loopFile = bb_simplify_path(mp->mnt_fsname);
- mp->mnt_fsname = NULL; /* will receive malloced loop dev name */
+ mp->mnt_fsname = NULL; // will receive malloced loop dev name
if (set_loop(&(mp->mnt_fsname), loopFile, 0) < 0) {
if (errno == EPERM || errno == EACCES)
bb_error_msg(bb_msg_perm_denied_are_you_root);
@@ -1691,24 +1674,21 @@ static int singlemount(struct mntent *mp, int ignore_busy)
}
// Autodetect bind mounts
-
} else if (S_ISDIR(st.st_mode) && !mp->mnt_type)
vfsflags |= MS_BIND;
}
- /* If we know the fstype (or don't need to), jump straight
- * to the actual mount. */
-
+ // If we know the fstype (or don't need to), jump straight
+ // to the actual mount.
if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
rc = mount_it_now(mp, vfsflags, filteropts);
else {
// Loop through filesystem types until mount succeeds
// or we run out
- /* Initialize list of block backed filesystems. This has to be
- * done here so that during "mount -a", mounts after /proc shows up
- * can autodetect. */
-
+ // Initialize list of block backed filesystems. This has to be
+ // done here so that during "mount -a", mounts after /proc shows up
+ // can autodetect.
if (!fslist) {
fslist = get_block_backed_filesystems();
if (ENABLE_FEATURE_CLEAN_UP && fslist)
@@ -1723,7 +1703,6 @@ static int singlemount(struct mntent *mp, int ignore_busy)
}
// If mount failed, clean up loop file (if any).
-
if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
del_loop(mp->mnt_fsname);
if (ENABLE_FEATURE_CLEAN_UP) {
@@ -1745,7 +1724,6 @@ static int singlemount(struct mntent *mp, int ignore_busy)
// 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";
int mount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
@@ -1840,8 +1818,8 @@ int mount_main(int argc UNUSED_PARAM, char **argv)
if (ENABLE_FEATURE_MOUNT_FLAGS
&& (i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
) {
- rc = verbose_mount(/*source:*/ "", /*target:*/ argv[0],
- /*type:*/ "", /*flags:*/ i, /*data:*/ "");
+ // verbose_mount(source, target, type, flags, data)
+ rc = verbose_mount("", argv[0], "", i, "");
if (rc)
bb_simple_perror_msg_and_die(argv[0]);
return rc;
generated by cgit v1.1 at 2024-12-26 22:18:52 +0000