debugfs: add filefrag command

[thirdparty/e2fsprogs.git] / debugfs / debugfs.c

diff --git a/debugfs/debugfs.c b/debugfs/debugfs.c
index eba3b697efd844c3b31e3f6977d9834573a18213..6a768f0fadc67fcfd1fa02bf5f98c48471c11c56 100644 (file)
--- a/debugfs/debugfs.c
+++ b/debugfs/debugfs.c
@@ -140,7 +140,11 @@ void do_open_filesys(int argc, char **argv)
                        open_flags |= EXT2_FLAG_IMAGE_FILE;
                        break;
                case 'w':
+#ifdef READ_ONLY
+                       goto print_usage;
+#else
                        open_flags |= EXT2_FLAG_RW;
+#endif /* READ_ONLY */
                        break;
                case 'f':
                        open_flags |= EXT2_FLAG_FORCE;
@@ -184,8 +188,11 @@ void do_open_filesys(int argc, char **argv)
        return;
 
 print_usage:
-       fprintf(stderr, "%s: Usage: open [-s superblock] [-b blocksize] "
-               "[-c] [-w] <device>\n", argv[0]);
+       fprintf(stderr, "%s: Usage: open [-s superblock] [-b blocksize] [-c] "
+#ifndef READ_ONLY
+               "[-w] "
+#endif
+               "<device>\n", argv[0]);
 }
 
 void do_lcd(int argc, char **argv)
@@ -251,6 +258,7 @@ void do_close_filesys(int argc, char **argv)
        close_filesystem();
 }
 
+#ifndef READ_ONLY
 void do_init_filesys(int argc, char **argv)
 {
        struct ext2_super_block param;
@@ -276,6 +284,7 @@ void do_init_filesys(int argc, char **argv)
        root = cwd = EXT2_ROOT_INO;
        return;
 }
+#endif /* READ_ONLY */
 
 static void print_features(struct ext2_super_block * s, FILE *f)
 {
@@ -393,6 +402,7 @@ print_usage:
        fprintf(stderr, "%s: Usage: show_super [-h]\n", argv[0]);
 }
 
+#ifndef READ_ONLY
 void do_dirty_filesys(int argc EXT2FS_ATTR((unused)),
                      char **argv EXT2FS_ATTR((unused)))
 {
@@ -407,6 +417,7 @@ void do_dirty_filesys(int argc EXT2FS_ATTR((unused)),
                current_fs->super->s_state &= ~EXT2_VALID_FS;
        ext2fs_mark_super_dirty(current_fs);
 }
+#endif /* READ_ONLY */
 
 struct list_blocks_struct {
        FILE            *f;
@@ -964,6 +975,7 @@ void do_chroot(int argc, char *argv[])
        root = inode;
 }
 
+#ifndef READ_ONLY
 void do_clri(int argc, char *argv[])
 {
        ext2_ino_t inode;
@@ -1006,6 +1018,7 @@ void do_seti(int argc, char *argv[])
        ext2fs_mark_inode_bitmap2(current_fs->inode_map,inode);
        ext2fs_mark_ib_dirty(current_fs);
 }
+#endif /* READ_ONLY */
 
 void do_testi(int argc, char *argv[])
 {
@@ -1020,6 +1033,7 @@ void do_testi(int argc, char *argv[])
                printf("Inode %u is not in use\n", inode);
 }
 
+#ifndef READ_ONLY
 void do_freeb(int argc, char *argv[])
 {
        blk64_t block;
@@ -1057,6 +1071,7 @@ void do_setb(int argc, char *argv[])
        }
        ext2fs_mark_bb_dirty(current_fs);
 }
+#endif /* READ_ONLY */
 
 void do_testb(int argc, char *argv[])
 {
@@ -1074,6 +1089,7 @@ void do_testb(int argc, char *argv[])
        }
 }
 
+#ifndef READ_ONLY
 static void modify_u8(char *com, const char *prompt,
                      const char *format, __u8 *val)
 {
@@ -1217,6 +1233,7 @@ void do_modify_inode(int argc, char *argv[])
        if (debugfs_write_inode(inode_num, &inode, argv[1]))
                return;
 }
+#endif /* READ_ONLY */
 
 void do_change_working_dir(int argc, char *argv[])
 {
@@ -1298,6 +1315,7 @@ static int ext2_file_type(unsigned int mode)
        return 0;
 }
 
+#ifndef READ_ONLY
 static void make_link(char *sourcename, char *destname)
 {
        ext2_ino_t      ino;
@@ -1445,6 +1463,7 @@ void do_unlink(int argc, char *argv[])
 
        unlink_file_by_name(argv[1]);
 }
+#endif /* READ_ONLY */
 
 void do_find_free_block(int argc, char *argv[])
 {
@@ -1537,6 +1556,7 @@ void do_find_free_inode(int argc, char *argv[])
                printf("Free inode found: %u\n", free_inode);
 }
 
+#ifndef READ_ONLY
 static errcode_t copy_file(int fd, ext2_ino_t newfile)
 {
        ext2_file_t     e2_file;
@@ -1944,6 +1964,7 @@ void do_rmdir(int argc, char *argv[])
                        return;
        }
 }
+#endif /* READ_ONLY */
 
 void do_show_debugfs_params(int argc EXT2FS_ATTR((unused)),
                            char *argv[] EXT2FS_ATTR((unused)))
@@ -1957,6 +1978,7 @@ void do_show_debugfs_params(int argc EXT2FS_ATTR((unused)),
                current_fs ? current_fs->device_name : "--none--");
 }
 
+#ifndef READ_ONLY
 void do_expand_dir(int argc, char *argv[])
 {
        ext2_ino_t inode;
@@ -1990,6 +2012,7 @@ void do_features(int argc, char *argv[])
        }
        print_features(current_fs->super, stdout);
 }
+#endif /* READ_ONLY */
 
 void do_bmap(int argc, char *argv[])
 {
@@ -2047,6 +2070,7 @@ void do_imap(int argc, char *argv[])
 
 }
 
+#ifndef READ_ONLY
 void do_set_current_time(int argc, char *argv[])
 {
        time_t now;
@@ -2066,6 +2090,7 @@ void do_set_current_time(int argc, char *argv[])
                current_fs->now = now;
        }
 }
+#endif /* READ_ONLY */
 
 static int find_supp_feature(__u32 *supp, int feature_type, char *name)
 {
@@ -2132,6 +2157,7 @@ void do_supported_features(int argc, char *argv[])
        }
 }
 
+#ifndef READ_ONLY
 void do_punch(int argc, char *argv[])
 {
        ext2_ino_t      ino;
@@ -2162,14 +2188,19 @@ void do_punch(int argc, char *argv[])
                return;
        }
 }
+#endif /* READ_ONLY */
 
 void do_dump_mmp(int argc, char *argv[])
 {
-       struct ext2_super_block *sb = current_fs->super;
+       struct ext2_super_block *sb;
        struct mmp_struct *mmp_s;
        time_t t;
        errcode_t retval = 0;
 
+       if (check_fs_open(argv[0]))
+               return;
+
+       sb  = current_fs->super;
        if (sb->s_mmp_block <= sb->s_first_data_block ||
            sb->s_mmp_block >= ext2fs_blocks_count(sb)) {
                com_err(argv[0], EXT2_ET_MMP_BAD_BLOCK, "while dumping it.\n");
@@ -2203,6 +2234,7 @@ void do_dump_mmp(int argc, char *argv[])
        fprintf(stdout, "time: %lld -- %s", mmp_s->mmp_time, ctime(&t));
        fprintf(stdout, "node_name: %s\n", mmp_s->mmp_nodename);
        fprintf(stdout, "device_name: %s\n", mmp_s->mmp_bdevname);
+       fprintf(stdout, "magic: 0x%x\n", mmp_s->mmp_magic);
 }
 
 static int source_file(const char *cmd_file, int sci_idx)
@@ -2251,7 +2283,13 @@ int main(int argc, char **argv)
 {
        int             retval;
        int             sci_idx;
-       const char      *usage = "Usage: %s [-b blocksize] [-s superblock] [-f cmd_file] [-R request] [-V] [[-w] [-c] device]";
+       const char      *usage = 
+               "Usage: %s [-b blocksize] [-s superblock] [-f cmd_file] "
+               "[-R request] [-V] ["
+#ifndef READ_ONLY
+               "[-w] "
+#endif
+               "[-c] device]";
        int             c;
        int             open_flags = EXT2_FLAG_SOFTSUPP_FEATURES | EXT2_FLAG_64BITS;
        char            *request = 0;
@@ -2261,15 +2299,23 @@ int main(int argc, char **argv)
        blk64_t         blocksize = 0;
        int             catastrophic = 0;
        char            *data_filename = 0;
+#ifdef READ_ONLY
+       const char      *opt_string = "icR:f:b:s:Vd:D";
+#else
+       const char      *opt_string = "iwcR:f:b:s:Vd:D";
+#endif
 
        if (debug_prog_name == 0)
+#ifdef READ_ONLY
+               debug_prog_name = "rdebugfs";
+#else
                debug_prog_name = "debugfs";
-
+#endif
        add_error_table(&et_ext2_error_table);
        fprintf (stderr, "%s %s (%s)\n", debug_prog_name,
                 E2FSPROGS_VERSION, E2FSPROGS_DATE);
 
-       while ((c = getopt (argc, argv, "iwcR:f:b:s:Vd:D")) != EOF) {
+       while ((c = getopt (argc, argv, opt_string)) != EOF) {
                switch (c) {
                case 'R':
                        request = optarg;
@@ -2283,9 +2329,11 @@ int main(int argc, char **argv)
                case 'i':
                        open_flags |= EXT2_FLAG_IMAGE_FILE;
                        break;
+#ifndef READ_ONLY
                case 'w':
                        open_flags |= EXT2_FLAG_RW;
                        break;
+#endif
                case 'D':
                        open_flags |= EXT2_FLAG_DIRECT_IO;
                        break;