mount: move realpath.c code to lib/

Signed-off-by: Karel Zak <kzak@redhat.com>

1 files changed, 0 insertions, 177 deletions

diff --git a/mount/realpath.c b/mount/realpath.c
deleted file mode 100644
index 9b46951b5..000000000
--- a/mount/realpath.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
- * realpath.c -- canonicalize pathname by removing symlinks
- * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Library Public License for more details.
- */
-
-#define resolve_symlinks
-
-/*
- * This routine is part of libc.  We include it nevertheless,
- * since the libc version has some security flaws.
- */
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include "realpath.h"
-#include "sundries.h"		/* for xstrdup */
-
-#ifndef MAXSYMLINKS
-# define MAXSYMLINKS 256
-#endif
-
-int
-is_pseudo_fs(const char *type)
-{
-	if (type == NULL || *type == '/')
-		return 0;
-	if (streq(type, "none") ||
-	    streq(type, "proc") ||
-	    streq(type, "tmpfs") ||
-	    streq(type, "sysfs") ||
-	    streq(type, "devpts"))
-		return 1;
-	return 0;
-}
-
-/* Make a canonical pathname from PATH.  Returns a freshly malloced string.
-   It is up the *caller* to ensure that the PATH is sensible.  i.e.
-   canonicalize ("/dev/fd0/.") returns "/dev/fd0" even though ``/dev/fd0/.''
-   is not a legal pathname for ``/dev/fd0''.  Anything we cannot parse
-   we return unmodified.   */
-char *
-canonicalize_spec (const char *path)
-{
-	if (path == NULL)
-		return NULL;
-	if (is_pseudo_fs(path))
-		return xstrdup(path);
-	return canonicalize(path);
-}
-
-char *
-canonicalize (const char *path) {
-	char canonical[PATH_MAX+2];
-
-	if (path == NULL)
-		return NULL;
-
-	if (myrealpath (path, canonical, PATH_MAX+1))
-		return xstrdup(canonical);
-
-	return xstrdup(path);
-}
-
-char *
-myrealpath(const char *path, char *resolved_path, int maxreslth) {
-	int readlinks = 0;
-	char *npath;
-	char link_path[PATH_MAX+1];
-	int n;
-	char *buf = NULL;
-
-	npath = resolved_path;
-
-	/* If it's a relative pathname use getcwd for starters. */
-	if (*path != '/') {
-		if (!getcwd(npath, maxreslth-2))
-			return NULL;
-		npath += strlen(npath);
-		if (npath[-1] != '/')
-			*npath++ = '/';
-	} else {
-		*npath++ = '/';
-		path++;
-	}
-
-	/* Expand each slash-separated pathname component. */
-	while (*path != '\0') {
-		/* Ignore stray "/" */
-		if (*path == '/') {
-			path++;
-			continue;
-		}
-		if (*path == '.' && (path[1] == '\0' || path[1] == '/')) {
-			/* Ignore "." */
-			path++;
-			continue;
-		}
-		if (*path == '.' && path[1] == '.' &&
-		    (path[2] == '\0' || path[2] == '/')) {
-			/* Backup for ".." */
-			path += 2;
-			while (npath > resolved_path+1 &&
-			       (--npath)[-1] != '/')
-				;
-			continue;
-		}
-		/* Safely copy the next pathname component. */
-		while (*path != '\0' && *path != '/') {
-			if (npath-resolved_path > maxreslth-2) {
-				errno = ENAMETOOLONG;
-				goto err;
-			}
-			*npath++ = *path++;
-		}
-
-		/* Protect against infinite loops. */
-		if (readlinks++ > MAXSYMLINKS) {
-			errno = ELOOP;
-			goto err;
-		}
-
-		/* See if last pathname component is a symlink. */
-		*npath = '\0';
-		n = readlink(resolved_path, link_path, PATH_MAX);
-		if (n < 0) {
-			/* EINVAL means the file exists but isn't a symlink. */
-			if (errno != EINVAL)
-				goto err;
-		} else {
-#ifdef resolve_symlinks		/* Richard Gooch dislikes sl resolution */
-			int m;
-			char *newbuf;
-
-			/* Note: readlink doesn't add the null byte. */
-			link_path[n] = '\0';
-			if (*link_path == '/')
-				/* Start over for an absolute symlink. */
-				npath = resolved_path;
-			else
-				/* Otherwise back up over this component. */
-				while (*(--npath) != '/')
-					;
-
-			/* Insert symlink contents into path. */
-			m = strlen(path);
-			newbuf = xmalloc(m + n + 1);
-			memcpy(newbuf, link_path, n);
-			memcpy(newbuf + n, path, m + 1);
-			free(buf);
-			path = buf = newbuf;
-#endif
-		}
-		*npath++ = '/';
-	}
-	/* Delete trailing slash but don't whomp a lone slash. */
-	if (npath != resolved_path+1 && npath[-1] == '/')
-		npath--;
-	/* Make sure it's null terminated. */
-	*npath = '\0';
-
-	free(buf);
-	return resolved_path;
-
- err:
-	free(buf);
-	return NULL;
-}