Improved port of ifconfig... smaller and with more features.

[oweals/busybox.git] / mount.c

diff --git a/mount.c b/mount.c
index 79813ba18ff76ce03b457d09345e6f5785168e4d..fd68dafd6a3bd1e0786d10ec372685af9027083a 100644 (file)
--- a/mount.c
+++ b/mount.c
@@ -43,7 +43,6 @@
  *     
  */
 
-#include "busybox.h"
 #include <stdlib.h>
 #include <unistd.h>
 #include <errno.h>
@@ -54,6 +53,7 @@
 #if defined BB_FEATURE_USE_DEVPS_PATCH
 #include <linux/devmtab.h> /* For Erik's nifty devmtab device driver */
 #endif
+#include "busybox.h"
 
 enum {
        MS_MGC_VAL = 0xc0ed0000, /* Magic number indicatng "new" flags */
@@ -84,6 +84,11 @@ extern int mount (__const char *__special_file, __const char *__dir,
 extern int umount (__const char *__special_file);
 extern int umount2 (__const char *__special_file, int __flags);
 
+#include <sys/syscall.h>
+#include <linux/unistd.h>
+static int sysfs( int option, unsigned int fs_index, char * buf);
+_syscall3(int, sysfs, int, option, unsigned int, fs_index, char *, buf);
+
 
 extern const char mtab_file[]; /* Defined in utility.c */
 
@@ -128,7 +133,8 @@ do_mount(char *specialfile, char *dir, char *filesystemtype,
 #if defined BB_FEATURE_MOUNT_LOOP
                if (use_loop==TRUE) {
                        int loro = flags & MS_RDONLY;
-                       char *lofile = specialfile;
+                       
+                       lofile = specialfile;
 
                        specialfile = find_unused_loop_device();
                        if (specialfile == NULL) {
@@ -232,72 +238,34 @@ mount_one(char *blockDevice, char *directory, char *filesystemType,
 {
        int status = 0;
 
-       char buf[255];
        if (strcmp(filesystemType, "auto") == 0) {
-               FILE *f = xfopen("/proc/filesystems", "r");
-
-               while (fgets(buf, sizeof(buf), f) != NULL) {
-                       filesystemType = buf;
-                       if (*filesystemType == '\t') {  // Not a nodev filesystem
-
-                               // Add NULL termination to each line
-                               while (*filesystemType && *filesystemType != '\n')
-                                       filesystemType++;
-                               *filesystemType = '\0';
-
-                               filesystemType = buf;
-                               filesystemType++;       // hop past tab
-
+               static const char *strings[] = { "tmpfs", "shm", "proc", "ramfs", "devpts", 0 };
+               const char** nodevfss;
+               const int num_of_filesystems = sysfs(3, 0, 0);
+               char buf[255];
+               int i=0;
+
+               filesystemType=buf;
+
+               while(i < num_of_filesystems) {
+                       sysfs(2, i++, filesystemType);
+                       for (nodevfss = strings; *nodevfss; nodevfss++) {
+                               if (!strcmp(filesystemType, *nodevfss)) {
+                                       break;
+                               }
+                       }
+                       if (!*nodevfss) {
                                status = do_mount(blockDevice, directory, filesystemType,
-                                                                 flags | MS_MGC_VAL, string_flags,
-                                                                 useMtab, fakeIt, mtab_opts);
+                                       flags | MS_MGC_VAL, string_flags,
+                                       useMtab, fakeIt, mtab_opts);
                                if (status == TRUE)
                                        break;
                        }
                }
-               fclose(f);
-       } else
-#if defined BB_FEATURE_USE_DEVPS_PATCH
-       if (strcmp(filesystemType, "auto") == 0) {
-               int fd, i, numfilesystems;
-               char device[] = "/dev/mtab";
-               struct k_fstype *fslist;
-
-               /* open device */ 
-               fd = open(device, O_RDONLY);
-               if (fd < 0)
-                       perror_msg_and_die("open failed for `%s'", device);
-
-               /* How many filesystems?  We need to know to allocate enough space */
-               numfilesystems = ioctl (fd, DEVMTAB_COUNT_FILESYSTEMS);
-               if (numfilesystems<0)
-                       perror_msg_and_die("\nDEVMTAB_COUNT_FILESYSTEMS");
-               fslist = (struct k_fstype *) xcalloc ( numfilesystems, sizeof(struct k_fstype));
-
-               /* Grab the list of available filesystems */
-               status = ioctl (fd, DEVMTAB_GET_FILESYSTEMS, fslist);
-               if (status<0)
-                       perror_msg_and_die("\nDEVMTAB_GET_FILESYSTEMS");
-
-               /* Walk the list trying to mount filesystems 
-                * that do not claim to be nodev filesystems */
-               for( i = 0 ; i < numfilesystems ; i++) {
-                       if (fslist[i].mnt_nodev)
-                               continue;
-                       status = do_mount(blockDevice, directory, fslist[i].mnt_type,
-                                                         flags | MS_MGC_VAL, string_flags,
-                                                         useMtab, fakeIt, mtab_opts);
-                       if (status == TRUE)
-                               break;
-               }
-               free( fslist);
-               close(fd);
-       } else
-#endif
-       {
+       } else {
                status = do_mount(blockDevice, directory, filesystemType,
-                                                 flags | MS_MGC_VAL, string_flags, useMtab,
-                                                 fakeIt, mtab_opts);
+                               flags | MS_MGC_VAL, string_flags, useMtab,
+                               fakeIt, mtab_opts);
        }
 
        if (status == FALSE) {
@@ -478,10 +446,9 @@ singlemount:
                        if (strchr(device, ':') != NULL)
                                filesystemType = "nfs";
                        if (strcmp(filesystemType, "nfs") == 0) {
-                               rc = nfsmount (device, directory, &flags,
-                                       &extra_opts, &string_flags, 1);
-                               if ( rc != 0) {
-                                       perror_msg_and_die("nfsmount failed");  
+                               if (nfsmount (device, directory, &flags, &extra_opts,
+                                                       &string_flags, 1)) {
+                                       perror_msg("nfsmount failed");
                                        rc = EXIT_FAILURE;
                                }
                        }
@@ -499,11 +466,11 @@ singlemount:
                if (all == FALSE && fstabmount == TRUE && directory == NULL)
                        fprintf(stderr, "Can't find %s in /etc/fstab\n", device);
        
-               exit(rc);
+               return rc;
        }
        
        goto singlemount;
        
 goodbye:
-       usage(mount_usage);
+       show_usage();
 }