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/* vi: set sw=4 ts=4: */
/*
* 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;
}
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