1 files changed, 99 insertions, 0 deletions

diff --git a/e2fsprogs/ext2fs/unlink.c b/e2fsprogs/ext2fs/unlink.c
new file mode 100644
index 000000000..e7b2182d2
--- /dev/null
+++ b/e2fsprogs/ext2fs/unlink.c
@@ -0,0 +1,99 @@
+/*
+ * unlink.c --- delete links in a ext2fs directory
+ * 
+ * Copyright (C) 1993, 1994, 1997 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+struct link_struct  {
+        const char      *name;
+        int             namelen;
+        ext2_ino_t      inode;
+        int             flags;
+        struct ext2_dir_entry *prev;
+        int             done;
+};      
+
+#ifdef __TURBOC__
+ #pragma argsused
+#endif
+static int unlink_proc(struct ext2_dir_entry *dirent,
+                     int        offset EXT2FS_ATTR((unused)),
+                     int        blocksize EXT2FS_ATTR((unused)),
+                     char       *buf EXT2FS_ATTR((unused)),
+                     void       *priv_data)
+{
+        struct link_struct *ls = (struct link_struct *) priv_data;
+        struct ext2_dir_entry *prev;
+
+        prev = ls->prev;
+        ls->prev = dirent;
+
+        if (ls->name) {
+                if ((dirent->name_len & 0xFF) != ls->namelen)
+                        return 0;
+                if (strncmp(ls->name, dirent->name, dirent->name_len & 0xFF))
+                        return 0;
+        }
+        if (ls->inode) {
+                if (dirent->inode != ls->inode)
+                        return 0;
+        } else {
+                if (!dirent->inode)
+                        return 0;
+        }
+
+        if (prev) 
+                prev->rec_len += dirent->rec_len;
+        else
+                dirent->inode = 0;
+        ls->done++;
+        return DIRENT_ABORT|DIRENT_CHANGED;
+}
+
+#ifdef __TURBOC__
+ #pragma argsused
+#endif
+errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir,
+                        const char *name, ext2_ino_t ino,
+                        int flags EXT2FS_ATTR((unused)))
+{
+        errcode_t       retval;
+        struct link_struct ls;
+
+        EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+        if (!name && !ino)
+                return EXT2_ET_INVALID_ARGUMENT;
+
+        if (!(fs->flags & EXT2_FLAG_RW))
+                return EXT2_ET_RO_FILSYS;
+
+        ls.name = name;
+        ls.namelen = name ? strlen(name) : 0;
+        ls.inode = ino;
+        ls.flags = 0;
+        ls.done = 0;
+        ls.prev = 0;
+
+        retval = ext2fs_dir_iterate(fs, dir, DIRENT_FLAG_INCLUDE_EMPTY, 
+                                    0, unlink_proc, &ls);
+        if (retval)
+                return retval;
+
+        return (ls.done) ? 0 : EXT2_ET_DIR_NO_SPACE;
+}
+