fac10d7c59
Seriously though, read the Changelog for busybox 0.42, which this is about to become... -Erik
129 lines
3.0 KiB
C
129 lines
3.0 KiB
C
/*
|
|
* Mini ln implementation for busybox
|
|
*
|
|
*
|
|
* Copyright (C) 1999 by Lineo, inc.
|
|
* Written by Erik Andersen <andersen@lineo.com>, <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 "internal.h"
|
|
#define BB_DECLARE_EXTERN
|
|
#define bb_need_name_too_long
|
|
#define bb_need_not_a_directory
|
|
#include "messages.c"
|
|
|
|
#include <stdio.h>
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
#include <sys/param.h> /* for PATH_MAX */
|
|
|
|
static const char ln_usage[] =
|
|
"ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n\n"
|
|
"Create a link named LINK_NAME or DIRECTORY to the specified TARGET\n\n"
|
|
"Options:\n"
|
|
"\t-s\tmake symbolic links instead of hard links\n"
|
|
"\t-f\tremove existing destination files\n"
|
|
"\t-n\tno dereference symlinks - treat like normal file\n";
|
|
|
|
static int symlinkFlag = FALSE;
|
|
static int removeoldFlag = FALSE;
|
|
static int followLinks = TRUE;
|
|
|
|
extern int ln_main(int argc, char **argv)
|
|
{
|
|
char *linkName;
|
|
int linkIntoDirFlag;
|
|
|
|
if (argc < 3) {
|
|
usage (ln_usage);
|
|
}
|
|
argc--;
|
|
argv++;
|
|
|
|
/* Parse any options */
|
|
while (**argv == '-') {
|
|
while (*++(*argv))
|
|
switch (**argv) {
|
|
case 's':
|
|
symlinkFlag = TRUE;
|
|
break;
|
|
case 'f':
|
|
removeoldFlag = TRUE;
|
|
break;
|
|
case 'n':
|
|
followLinks = FALSE;
|
|
break;
|
|
default:
|
|
usage (ln_usage);
|
|
}
|
|
argc--;
|
|
argv++;
|
|
}
|
|
|
|
linkName = argv[argc - 1];
|
|
|
|
if (strlen(linkName) > PATH_MAX) {
|
|
fprintf(stderr, name_too_long, "ln");
|
|
exit FALSE;
|
|
}
|
|
|
|
linkIntoDirFlag = isDirectory(linkName, TRUE);
|
|
|
|
if ((argc > 3) && !linkIntoDirFlag) {
|
|
fprintf(stderr, not_a_directory, "ln", linkName);
|
|
exit FALSE;
|
|
}
|
|
|
|
while (argc-- >= 2) {
|
|
char srcName[PATH_MAX + 1];
|
|
int nChars, status;
|
|
|
|
if (strlen(*argv) > PATH_MAX) {
|
|
fprintf(stderr, name_too_long, "ln");
|
|
exit FALSE;
|
|
}
|
|
|
|
if (followLinks == FALSE) {
|
|
strcpy(srcName, *argv);
|
|
} else {
|
|
/* Warning! This can silently truncate if > PATH_MAX, but
|
|
I don't think that there can be one > PATH_MAX anyway. */
|
|
nChars = readlink(*argv, srcName, PATH_MAX);
|
|
srcName[nChars] = '\0';
|
|
}
|
|
|
|
if (removeoldFlag == TRUE) {
|
|
status = ( unlink(linkName) && errno != ENOENT );
|
|
if (status != 0) {
|
|
perror(linkName);
|
|
exit FALSE;
|
|
}
|
|
}
|
|
|
|
if (symlinkFlag == TRUE)
|
|
status = symlink(*argv, linkName);
|
|
else
|
|
status = link(*argv, linkName);
|
|
if (status != 0) {
|
|
perror(linkName);
|
|
exit FALSE;
|
|
}
|
|
}
|
|
exit TRUE;
|
|
}
|