Vladimir Dronnikov also submitted a CIFS support patch to mount, which I

heavily reworked here and probably broke.  Tomorrow I need to set up a
copy of samba to test against.  (This compiles, I make no promises beyond that.)

1 files changed, 49 insertions, 8 deletions

diff --git a/util-linux/mount.c b/util-linux/mount.c
index 93a94bc77..fef5f3f28 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -253,8 +253,7 @@ static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
         return rc;
 }
 
-
-// Mount one directory.  Handles NFS, loopback, autobind, and filesystem type
+// Mount one directory.  Handles CIFS, NFS, loopback, autobind, and filesystem type
 // detection.  Returns 0 for success, nonzero for failure.
 
 static int singlemount(struct mntent *mp, int ignore_busy)
@@ -270,6 +269,50 @@ static int singlemount(struct mntent *mp, int ignore_busy)
 
         if (mp->mnt_type && !strcmp(mp->mnt_type,"auto")) mp->mnt_type = 0;
 
+        // Might this be an CIFS filesystem?
+
+        if(ENABLE_FEATURE_MOUNT_CIFS &&
+                (!mp->mnt_type || !strcmp(mp->mnt_type,"cifs")) &&
+                (mp->mnt_fsname[0]==mp->mnt_fsname[1] && (mp->mnt_fsname[0]=='/' || mp->mnt_fsname[0]=='\\')))
+        {
+                struct hostent *he;
+                char ip[32], *s;
+
+                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
+
+                s = strrchr(mp->mnt_fsname, '\\');
+                if (s == mp->mnt_fsname+1) goto report_error;
+                *s = 0;
+                he = gethostbyname(mp->mnt_fsname+2);
+                *s = '\\';
+                if (!he) goto report_error;
+
+                // Insert ip=... option into string flags.  (NOTE: Add IPv6 support.)
+
+                sprintf(ip, "ip=%d.%d.%d.%d", he->h_addr[0], he->h_addr[1],
+                                he->h_addr[2], he->h_addr[3]);
+                parse_mount_options(ip, &filteropts);
+
+                // compose new unc '\\server-ip\share'
+
+                s = xasprintf("\\\\%s\\%s",ip+3,strchr(mp->mnt_fsname+2,'\\'));
+                if (ENABLE_FEATURE_CLEAN_UP) free(mp->mnt_fsname);
+                mp->mnt_fsname = s;
+
+                // lock is required
+                vfsflags |= MS_MANDLOCK;
+
+                mp->mnt_type = "cifs";
+                rc = mount_it_now(mp, vfsflags, filteropts);
+                goto report_error;
+        }
+
         // Might this be an NFS filesystem?
 
         if (ENABLE_FEATURE_MOUNT_NFS &&
@@ -278,15 +321,12 @@ static int singlemount(struct mntent *mp, int ignore_busy)
         {
                 if (nfsmount(mp->mnt_fsname, mp->mnt_dir, &vfsflags, &filteropts, 1)) {
                         bb_perror_msg("nfsmount failed");
-                        goto report_error;
                 } else {
                         // Strangely enough, nfsmount() doesn't actually mount() anything.
                         mp->mnt_type = "nfs";
                         rc = mount_it_now(mp, vfsflags, filteropts);
-                        if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
-                        
-                        goto report_error;
                 }
+                goto report_error;
         }
 
         // Look at the file.  (Not found isn't a failure for remount, or for
@@ -344,8 +384,6 @@ static int singlemount(struct mntent *mp, int ignore_busy)
                 }
         }
 
-        if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
-
         // If mount failed, clean up loop file (if any).
 
         if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
@@ -355,7 +393,10 @@ static int singlemount(struct mntent *mp, int ignore_busy)
                         free(mp->mnt_fsname);
                 }
         }
+
 report_error:
+        if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
+
         if (rc && errno == EBUSY && ignore_busy) rc = 0;
         if (rc < 0)
                 bb_perror_msg("Mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);