Fix bug #1108 by always canonicalizing arguments.

git-svn-id: svn://busybox.net/trunk/busybox@2517 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 16 insertions, 13 deletions

diff --git a/util-linux/mount.c b/util-linux/mount.c
index fa298d93a..89eb099c5 100644
--- a/util-linux/mount.c
+++ b/util-linux/mount.c
@@ -43,6 +43,7 @@
  *      
  */
 
+#include <limits.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <errno.h>
@@ -338,8 +339,7 @@ extern int mount_main(int argc, char **argv)
         char *extra_opts = string_flags_buf;
         int flags = 0;
         char *filesystemType = "auto";
-        char *device = NULL;
-        char *directory = NULL;
+        char device[PATH_MAX], directory[PATH_MAX];
         int all = FALSE;
         int fakeIt = FALSE;
         int useMtab = TRUE;
@@ -378,15 +378,18 @@ extern int mount_main(int argc, char **argv)
                 }
         }
 
-        if (argv[optind] != NULL) {
-                device = argv[optind];
-                directory = argv[optind + 1];
-        }
-
-        if (device == NULL && !all)
+        if (!all && optind == argc)
                 show_mounts();
 
-        if (all == TRUE || directory == NULL) {
+        if (optind < argc)
+                if (realpath(argv[optind], device) == NULL)
+                        perror_msg_and_die("%s", device);
+
+        if (optind + 1 < argc)
+                if (realpath(argv[optind + 1], directory) == NULL)
+                        perror_msg_and_die("%s", directory);
+
+        if (all == TRUE || optind + 1 == argc) {
                 struct mntent *m;
                 FILE *f = setmntent("/etc/fstab", "r");
                 fstabmount = TRUE;
@@ -395,7 +398,7 @@ extern int mount_main(int argc, char **argv)
                         perror_msg_and_die( "\nCannot read /etc/fstab");
 
                 while ((m = getmntent(f)) != NULL) {
-                        if (all == FALSE && directory == NULL && (
+                        if (all == FALSE && optind + 1 == argc && (
                                 (strcmp(device, m->mnt_fsname) != 0) &&
                                 (strcmp(device, m->mnt_dir) != 0) ) ) {
                                 continue;
@@ -414,8 +417,8 @@ extern int mount_main(int argc, char **argv)
                                 parse_mount_options(m->mnt_opts, &flags, string_flags);
                         }
                         
-                        device = strdup(m->mnt_fsname);
-                        directory = strdup(m->mnt_dir);
+                        strcpy(device, m->mnt_fsname);
+                        strcpy(directory, m->mnt_dir);
                         filesystemType = strdup(m->mnt_type);
 singlemount:                    
                         string_flags = strdup(string_flags);
@@ -441,7 +444,7 @@ singlemount:
                 if (fstabmount == TRUE)
                         endmntent(f);
                         
-                if (all == FALSE && fstabmount == TRUE && directory == NULL)
+                if (all == FALSE && fstabmount == TRUE && optind + 1 == argc)
                         fprintf(stderr, "Can't find %s in /etc/fstab\n", device);
         
                 return rc;