mirror of
https://github.com/sheumann/hush.git
synced 2024-08-17 00:29:03 +00:00
#49: I found one memory overflow and memory leak in "ln" applet. Last patch reduced also 54 bytes. ;) #50: I found bug in loginutils/Makefile.in. New patch have also new function to libbb and aplied this to applets and other cosmetic changes.
134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini ln implementation for busybox
|
|
*
|
|
* Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
|
|
* Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.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
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <dirent.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include "busybox.h"
|
|
|
|
|
|
static const int LN_SYMLINK = 1;
|
|
static const int LN_FORCE = 2;
|
|
static const int LN_NODEREFERENCE = 4;
|
|
|
|
/*
|
|
* linkDestName is where the link points to,
|
|
* linkSrcName is the name of the link to be created.
|
|
*/
|
|
static int fs_link(const char *link_destname, const char *link_srcname,
|
|
const int flag)
|
|
{
|
|
int status;
|
|
int src_is_dir;
|
|
char *src_name = 0;
|
|
const char *src;
|
|
|
|
if (link_destname==NULL)
|
|
return(FALSE);
|
|
|
|
if (link_srcname==NULL)
|
|
src = link_destname;
|
|
else
|
|
src = link_srcname;
|
|
|
|
if (flag&LN_NODEREFERENCE)
|
|
src_is_dir = is_directory(src, TRUE, NULL);
|
|
else
|
|
src_is_dir = is_directory(src, FALSE, NULL);
|
|
|
|
if ((src_is_dir==TRUE)&&((flag&LN_NODEREFERENCE)==0)) {
|
|
char* srcdir_name;
|
|
|
|
srcdir_name = xstrdup(link_destname);
|
|
src_name = concat_path_file(src, get_last_path_component(srcdir_name));
|
|
src = src_name;
|
|
free(srcdir_name);
|
|
}
|
|
|
|
if (flag&LN_FORCE)
|
|
unlink(src);
|
|
|
|
if (flag&LN_SYMLINK)
|
|
status = symlink(link_destname, src);
|
|
else
|
|
status = link(link_destname, src);
|
|
|
|
if (status != 0) {
|
|
perror_msg(src);
|
|
status = FALSE;
|
|
} else {
|
|
status = TRUE;
|
|
}
|
|
free(src_name);
|
|
return status;
|
|
}
|
|
|
|
extern int ln_main(int argc, char **argv)
|
|
{
|
|
int status = EXIT_SUCCESS;
|
|
int flag = 0;
|
|
int opt;
|
|
|
|
/* Parse any options */
|
|
while ((opt=getopt(argc, argv, "sfn")) != -1) {
|
|
switch(opt) {
|
|
case 's':
|
|
flag |= LN_SYMLINK;
|
|
break;
|
|
case 'f':
|
|
flag |= LN_FORCE;
|
|
break;
|
|
case 'n':
|
|
flag |= LN_NODEREFERENCE;
|
|
break;
|
|
default:
|
|
show_usage();
|
|
}
|
|
}
|
|
if (optind > (argc-1)) {
|
|
show_usage();
|
|
}
|
|
if (optind == (argc-1)) {
|
|
if (fs_link(argv[optind],
|
|
get_last_path_component(argv[optind]), flag)==FALSE)
|
|
status = EXIT_FAILURE;
|
|
}
|
|
while(optind<(argc-1)) {
|
|
if (fs_link(argv[optind], argv[argc-1], flag)==FALSE)
|
|
status = EXIT_FAILURE;
|
|
optind++;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
Local Variables:
|
|
c-file-style: "linux"
|
|
c-basic-offset: 4
|
|
tab-width: 4
|
|
End:
|
|
*/
|