busybox/coreutils/ln.c

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/* vi: set sw=4 ts=4: */
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/*
* Mini ln implementation for busybox
*
* Copyright (C) 1999,2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
* 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 "busybox.h"
#define BB_DECLARE_EXTERN
#define bb_need_not_a_directory
#include "messages.c"
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#include <stdio.h>
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#include <dirent.h>
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#include <errno.h>
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static int symlinkFlag = FALSE;
static int removeoldFlag = FALSE;
static int followLinks = TRUE;
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extern int ln_main(int argc, char **argv)
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{
char *linkName, *dirName=NULL;
int linkIntoDirFlag;
int stopIt = FALSE;
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argc--;
argv++;
/* Parse any options */
while (argc > 0 && stopIt == FALSE) {
if (**argv == '-') {
while (*++(*argv))
switch (**argv) {
case 's':
symlinkFlag = TRUE;
break;
case 'f':
removeoldFlag = TRUE;
break;
case 'n':
followLinks = FALSE;
break;
case '-':
stopIt = TRUE;
break;
default:
usage(ln_usage);
}
argc--;
argv++;
}
else
break;
}
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if (argc < 2) {
usage(ln_usage);
}
linkName = argv[argc - 1];
linkIntoDirFlag = isDirectory(linkName, followLinks, NULL);
if ((argc >= 3) && linkIntoDirFlag == FALSE) {
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errorMsg(not_a_directory, linkName);
exit FALSE;
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}
if (linkIntoDirFlag == TRUE)
dirName = linkName;
while (argc-- >= 2) {
int status;
if (linkIntoDirFlag == TRUE) {
char *baseName = get_last_path_component(*argv);
linkName = (char *)xmalloc(strlen(dirName)+strlen(baseName)+2);
strcpy(linkName, dirName);
if(dirName[strlen(dirName)-1] != '/')
strcat(linkName, "/");
strcat(linkName,baseName);
}
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;
}
if (linkIntoDirFlag == TRUE)
free(linkName);
argv++;
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}
return( TRUE);
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}
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/