mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
39a841cecf
ln.c: error_msg(str)->error_msg(%s, str) - remove standart "feature" for hackers reduce 100 bytes don't care in sum
119 lines
2.8 KiB
C
119 lines
2.8 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini ln implementation for busybox
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, 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
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
/* BB_AUDIT SUSv3 compliant */
|
|
/* BB_AUDIT GNU options missing: -d, -F, -i, and -v. */
|
|
/* http://www.opengroup.org/onlinepubs/007904975/utilities/ln.html */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include "busybox.h"
|
|
|
|
#define LN_SYMLINK 1
|
|
#define LN_FORCE 2
|
|
#define LN_NODEREFERENCE 4
|
|
#define LN_BACKUP 8
|
|
#define LN_SUFFIX 16
|
|
|
|
extern int ln_main(int argc, char **argv)
|
|
{
|
|
int status = EXIT_SUCCESS;
|
|
int flag;
|
|
char *last;
|
|
char *src_name;
|
|
char *src;
|
|
char *suffix = "~";
|
|
struct stat statbuf;
|
|
int (*link_func)(const char *, const char *);
|
|
|
|
flag = bb_getopt_ulflags(argc, argv, "sfnbS:", &suffix);
|
|
|
|
if (argc == optind) {
|
|
bb_show_usage();
|
|
}
|
|
|
|
last = argv[argc - 1];
|
|
argv += optind;
|
|
|
|
if (argc == optind + 1) {
|
|
*--argv = last;
|
|
last = bb_get_last_path_component(bb_xstrdup(last));
|
|
}
|
|
|
|
do {
|
|
src_name = NULL;
|
|
src = last;
|
|
|
|
if (is_directory(src,
|
|
(flag & LN_NODEREFERENCE) ^ LN_NODEREFERENCE,
|
|
NULL)) {
|
|
src_name = bb_xstrdup(*argv);
|
|
src = concat_path_file(src, bb_get_last_path_component(src_name));
|
|
free(src_name);
|
|
src_name = src;
|
|
}
|
|
if (!(flag & LN_SYMLINK) && stat(*argv, &statbuf)) {
|
|
bb_perror_msg("%s", *argv);
|
|
status = EXIT_FAILURE;
|
|
free(src_name);
|
|
continue;
|
|
}
|
|
|
|
if (flag & LN_BACKUP) {
|
|
char *backup;
|
|
backup = bb_xasprintf("%s%s", src, suffix);
|
|
if (rename(src, backup) < 0 && errno != ENOENT) {
|
|
bb_perror_msg("%s", src);
|
|
status = EXIT_FAILURE;
|
|
free(backup);
|
|
continue;
|
|
}
|
|
free(backup);
|
|
/*
|
|
* When the source and dest are both hard links to the same
|
|
* inode, a rename may succeed even though nothing happened.
|
|
* Therefore, always unlink().
|
|
*/
|
|
unlink(src);
|
|
} else if (flag & LN_FORCE) {
|
|
unlink(src);
|
|
}
|
|
|
|
link_func = link;
|
|
if (flag & LN_SYMLINK) {
|
|
link_func = symlink;
|
|
}
|
|
|
|
if (link_func(*argv, src) != 0) {
|
|
bb_perror_msg(src);
|
|
status = EXIT_FAILURE;
|
|
}
|
|
|
|
free(src_name);
|
|
|
|
} while ((++argv)[1]);
|
|
|
|
return status;
|
|
}
|