d378c3149c
#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: */
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/*
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* Mini ln implementation for busybox
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*
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* Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
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* Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <dirent.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include "busybox.h"
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static const int LN_SYMLINK = 1;
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static const int LN_FORCE = 2;
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static const int LN_NODEREFERENCE = 4;
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/*
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* linkDestName is where the link points to,
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* linkSrcName is the name of the link to be created.
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*/
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static int fs_link(const char *link_destname, const char *link_srcname,
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const int flag)
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{
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int status;
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int src_is_dir;
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char *src_name = 0;
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const char *src;
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if (link_destname==NULL)
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return(FALSE);
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if (link_srcname==NULL)
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src = link_destname;
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else
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src = link_srcname;
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if (flag&LN_NODEREFERENCE)
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src_is_dir = is_directory(src, TRUE, NULL);
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else
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src_is_dir = is_directory(src, FALSE, NULL);
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if ((src_is_dir==TRUE)&&((flag&LN_NODEREFERENCE)==0)) {
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char* srcdir_name;
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srcdir_name = xstrdup(link_destname);
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src_name = concat_path_file(src, get_last_path_component(srcdir_name));
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src = src_name;
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free(srcdir_name);
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}
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if (flag&LN_FORCE)
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unlink(src);
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if (flag&LN_SYMLINK)
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status = symlink(link_destname, src);
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else
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status = link(link_destname, src);
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if (status != 0) {
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perror_msg(src);
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status = FALSE;
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} else {
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status = TRUE;
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}
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free(src_name);
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return status;
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}
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extern int ln_main(int argc, char **argv)
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{
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int status = EXIT_SUCCESS;
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int flag = 0;
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int opt;
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/* Parse any options */
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while ((opt=getopt(argc, argv, "sfn")) != -1) {
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switch(opt) {
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case 's':
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flag |= LN_SYMLINK;
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break;
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case 'f':
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flag |= LN_FORCE;
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break;
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case 'n':
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flag |= LN_NODEREFERENCE;
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break;
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default:
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show_usage();
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}
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}
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if (optind > (argc-1)) {
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show_usage();
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}
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if (optind == (argc-1)) {
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if (fs_link(argv[optind],
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get_last_path_component(argv[optind]), flag)==FALSE)
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status = EXIT_FAILURE;
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}
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while(optind<(argc-1)) {
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if (fs_link(argv[optind], argv[argc-1], flag)==FALSE)
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status = EXIT_FAILURE;
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optind++;
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}
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return status;
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}
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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