/*
* get_pathname.c --- do directry/inode -> name translation
- *
- * Copyright (C) 1993 Theodore Ts'o. This file may be redistributed
- * under the terms of the GNU Public License.
+ *
+ * Copyright (C) 1993, 1994, 1995 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
*/
+/*
+ *
+ * ext2fs_get_pathname(fs, dir, ino, name)
+ *
+ * This function translates takes two inode numbers into a
+ * string, placing the result in <name>. <dir> is the containing
+ * directory inode, and <ino> is the inode number itself. If
+ * <ino> is zero, then ext2fs_get_pathname will return pathname
+ * of the the directory <dir>.
+ *
+ */
+
+#include "config.h"
#include <stdio.h>
#include <string.h>
+#if HAVE_UNISTD_H
#include <unistd.h>
-#include <stdlib.h>
-#include <linux/fs.h>
-#include <linux/ext2_fs.h>
+#endif
+#include "ext2_fs.h"
#include "ext2fs.h"
struct get_pathname_struct {
- int search_ino;
- int parent;
+ ext2_ino_t search_ino;
+ ext2_ino_t parent;
char *name;
errcode_t errcode;
};
+#ifdef __TURBOC__
+ #pragma argsused
+#endif
static int get_pathname_proc(struct ext2_dir_entry *dirent,
- int offset,
- int blocksize,
- char *buf,
- void *private)
+ int offset EXT2FS_ATTR((unused)),
+ int blocksize EXT2FS_ATTR((unused)),
+ char *buf EXT2FS_ATTR((unused)),
+ void *priv_data)
{
struct get_pathname_struct *gp;
+ errcode_t retval;
- gp = (struct get_pathname_struct *) private;
+ gp = (struct get_pathname_struct *) priv_data;
- if ((dirent->name_len == 2) &&
+ if (((dirent->name_len & 0xFF) == 2) &&
!strncmp(dirent->name, "..", 2))
gp->parent = dirent->inode;
if (dirent->inode == gp->search_ino) {
- gp->name = malloc(dirent->name_len + 1);
- if (!gp->name) {
- gp->errcode = ENOMEM;
+ retval = ext2fs_get_mem((dirent->name_len & 0xFF) + 1,
+ &gp->name);
+ if (retval) {
+ gp->errcode = retval;
return DIRENT_ABORT;
}
- strncpy(gp->name, dirent->name, dirent->name_len);
- gp->name[dirent->name_len] = '\0';
+ strncpy(gp->name, dirent->name, (dirent->name_len & 0xFF));
+ gp->name[dirent->name_len & 0xFF] = '\0';
return DIRENT_ABORT;
}
return 0;
}
-static errcode_t ext2fs_get_pathname_int(ext2_filsys fs, ino_t dir, ino_t ino,
- int maxdepth, char *buf, char **name)
+static errcode_t ext2fs_get_pathname_int(ext2_filsys fs, ext2_ino_t dir,
+ ext2_ino_t ino, int maxdepth,
+ char *buf, char **name)
{
struct get_pathname_struct gp;
- char *parent_name, *ret;
+ char *parent_name = 0, *ret;
errcode_t retval;
if (dir == ino) {
- *name = malloc(2);
- if (!*name)
- return ENOMEM;
+ retval = ext2fs_get_mem(2, name);
+ if (retval)
+ return retval;
strcpy(*name, (dir == EXT2_ROOT_INO) ? "/" : ".");
return 0;
}
if (!dir || (maxdepth < 0)) {
- *name = malloc(4);
- if (!*name)
- return ENOMEM;
+ retval = ext2fs_get_mem(4, name);
+ if (retval)
+ return retval;
strcpy(*name, "...");
return 0;
}
gp.parent = 0;
gp.name = 0;
gp.errcode = 0;
-
+
retval = ext2fs_dir_iterate(fs, dir, 0, buf, get_pathname_proc, &gp);
- if (retval)
+ if (retval == EXT2_ET_NO_DIRECTORY) {
+ char buf[32];
+
+ if (ino)
+ snprintf(buf, sizeof(buf), "<%u>/<%u>", dir, ino);
+ else
+ snprintf(buf, sizeof(buf), "<%u>", dir);
+ retval = ext2fs_get_mem(strlen(buf)+1, name);
+ if (retval)
+ goto cleanup;
+ strcpy(*name, buf);
+ return 0;
+ } else if (retval)
goto cleanup;
if (gp.errcode) {
retval = gp.errcode;
*name = parent_name;
return 0;
}
-
- ret = malloc(strlen(parent_name)+strlen(gp.name)+2);
- if (!ret) {
- retval = ENOMEM;
+
+ if (gp.name)
+ retval = ext2fs_get_mem(strlen(parent_name)+strlen(gp.name)+2,
+ &ret);
+ else
+ retval = ext2fs_get_mem(strlen(parent_name)+5, &ret);
+ if (retval)
goto cleanup;
- }
+
ret[0] = 0;
if (parent_name[1])
strcat(ret, parent_name);
else
strcat(ret, "???");
*name = ret;
- free(parent_name);
retval = 0;
-
+
cleanup:
- if (gp.name)
- free(gp.name);
+ ext2fs_free_mem(&parent_name);
+ ext2fs_free_mem(&gp.name);
return retval;
}
-errcode_t ext2fs_get_pathname(ext2_filsys fs, ino_t dir, ino_t ino,
+errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
char **name)
{
char *buf;
errcode_t retval;
- buf = malloc(fs->blocksize);
- if (!buf)
- return ENOMEM;
+ EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+ retval = ext2fs_get_mem(fs->blocksize, &buf);
+ if (retval)
+ return retval;
if (dir == ino)
ino = 0;
retval = ext2fs_get_pathname_int(fs, dir, ino, 32, buf, name);
- free(buf);
+ ext2fs_free_mem(&buf);
return retval;
-
+
}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff