debugfs: Add -p option to ls subcommand.

Originally submitted by Jason Pyeron:

While working with a compromized system (suckit root kit) hidden files
were viewable by debugfs but not any other utility.  When spaces and
tabs were put into the directory names defugfs did not "show" them.

"ls -p" quotes the output so is can be parsed easily.

Addresses-Red-Hat-Bugzilla: #149480
Addresses-Sourceforge-Feature-Request: #1201667

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/debugfs/debugfs.8.in b/debugfs/debugfs.8.in
index b9de234..74d8756 100644 (file)
--- a/debugfs/debugfs.8.in
+++ b/debugfs/debugfs.8.in
@@ -306,7 +306,7 @@ and
 .I \-b
 options.
 .TP
-.I ls [-l] [-d] filespec
+.I ls [-l] [-d] [-p] filespec
 Print a listing of the files in the directory
 .IR filespec .
 The 
@@ -315,6 +315,11 @@ flag will list files using a more verbose format.
 The
 .I \-d
 flag will list deleted entries in the directory.
+The 
+.I \-p
+flag will list the files in a format which is more easily parsable by
+scripts, as well as making it more clear when there are spaces or other
+non-prinitng characters at the end of filenames.
 .TP
 .I modify_inode filespec
 Modify the contents of the inode structure in the inode

diff --git a/debugfs/ls.c b/debugfs/ls.c
index 52c7e34..1ceeb1b 100644 (file)
--- a/debugfs/ls.c
+++ b/debugfs/ls.c
@@ -30,6 +30,7 @@ extern char *optarg;
 
 #define LONG_OPT       0x0001
 #define DELETED_OPT    0x0002
+#define PARSE_OPT      0x0004
 
 struct list_dir_struct {
        FILE    *f;
@@ -72,7 +73,16 @@ static int list_dir_proc(ext2_ino_t dir EXT2FS_ATTR((unused)),
        } else {
                lbr = rbr = ' ';
        }
-       if (ls->options & LONG_OPT) {
+       if (ls->options & PARSE_OPT) {
+               if (ino && debugfs_read_inode(ino, &inode, name)) return 0;
+               fprintf(ls->f,"/%u/%06o/%d/%d/%s/",ino,inode.i_mode,inode.i_uid, inode.i_gid,name);
+               if (LINUX_S_ISDIR(inode.i_mode))
+                       fprintf(ls->f, "/");
+               else
+                       fprintf(ls->f, "%lld/", inode.i_size | ((__u64)inode.i_size_high << 32));
+               fprintf(ls->f, "\n");
+       }
+       else if (ls->options & LONG_OPT) {
                if (ino) {
                        if (debugfs_read_inode(ino, &inode, name))
                                return 0;
@@ -123,7 +133,7 @@ void do_list_dir(int argc, char *argv[])
                return;
 
        reset_getopt();
-       while ((c = getopt (argc, argv, "dl")) != EOF) {
+       while ((c = getopt (argc, argv, "dlp")) != EOF) {
                switch (c) {
                case 'l':
                        ls.options |= LONG_OPT;
@@ -131,6 +141,9 @@ void do_list_dir(int argc, char *argv[])
                case 'd':
                        ls.options |= DELETED_OPT;
                        break;
+               case 'p':
+                       ls.options |= PARSE_OPT;
+                       break;
                default:
                        goto print_usage;
                }
@@ -138,7 +151,7 @@ void do_list_dir(int argc, char *argv[])
 
        if (argc > optind+1) {
        print_usage:
-               com_err(0, 0, "Usage: ls [-l] [-d] file");
+               com_err(0, 0, "Usage: ls [-l] [-d] [-p] file");
                return;
        }