d71e172ac6
respectively, in accordance with SUSv2. This differs from the approach taken in NetBSD, but provides less obscure error messages in at least the EISDIR case and does not take up additional disk space for new binaries. PR: 13071 PR: 13074 Requested by: James Howard <howardjp@wam.umd.edu>
193 lines
4.9 KiB
C
193 lines
4.9 KiB
C
/*
|
|
* Copyright (c) 1987, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char const copyright[] =
|
|
"@(#) Copyright (c) 1987, 1993, 1994\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)ln.c 8.2 (Berkeley) 3/31/94";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
int fflag; /* Unlink existing files. */
|
|
int sflag; /* Symbolic, not hard, link. */
|
|
int vflag; /* Verbose output. */
|
|
/* System link call. */
|
|
int (*linkf) __P((const char *, const char *));
|
|
char linkch;
|
|
|
|
int linkit __P((char *, char *, int));
|
|
void usage __P((void));
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
extern int optind;
|
|
struct stat sb;
|
|
int ch, exitval;
|
|
char *p, *sourcedir;
|
|
|
|
/*
|
|
* Test for the special case where the utility is called as
|
|
* "link", for which the functionality provided is greatly
|
|
* simplified.
|
|
*/
|
|
if ((p = rindex(argv[0], '/')) == NULL)
|
|
p = argv[0];
|
|
else
|
|
++p;
|
|
if (strcmp(p, "link") == 0) {
|
|
if (argc == 3) {
|
|
linkf = link;
|
|
exit(linkit(argv[1], argv[2], 0));
|
|
} else
|
|
usage();
|
|
}
|
|
|
|
while ((ch = getopt(argc, argv, "fsv")) != -1)
|
|
switch (ch) {
|
|
case 'f':
|
|
fflag = 1;
|
|
break;
|
|
case 's':
|
|
sflag = 1;
|
|
break;
|
|
case 'v':
|
|
vflag = 1;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
|
|
argv += optind;
|
|
argc -= optind;
|
|
|
|
linkf = sflag ? symlink : link;
|
|
linkch = sflag ? '-' : '=';
|
|
|
|
switch(argc) {
|
|
case 0:
|
|
usage();
|
|
case 1: /* ln target */
|
|
exit(linkit(argv[0], ".", 1));
|
|
case 2: /* ln target source */
|
|
exit(linkit(argv[0], argv[1], 0));
|
|
}
|
|
/* ln target1 target2 directory */
|
|
sourcedir = argv[argc - 1];
|
|
if (stat(sourcedir, &sb))
|
|
err(1, "%s", sourcedir);
|
|
if (!S_ISDIR(sb.st_mode))
|
|
usage();
|
|
for (exitval = 0; *argv != sourcedir; ++argv)
|
|
exitval |= linkit(*argv, sourcedir, 1);
|
|
exit(exitval);
|
|
}
|
|
|
|
int
|
|
linkit(target, source, isdir)
|
|
char *target, *source;
|
|
int isdir;
|
|
{
|
|
struct stat sb;
|
|
int exists;
|
|
char *p, path[MAXPATHLEN];
|
|
|
|
if (!sflag) {
|
|
/* If target doesn't exist, quit now. */
|
|
if (stat(target, &sb)) {
|
|
warn("%s", target);
|
|
return (1);
|
|
}
|
|
/* Only symbolic links to directories. */
|
|
if (S_ISDIR(sb.st_mode)) {
|
|
errno = EISDIR;
|
|
warn("%s", target);
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
/* If the source is a directory, append the target's name. */
|
|
if (isdir || ((exists = !stat(source, &sb)) && S_ISDIR(sb.st_mode))) {
|
|
if ((p = strrchr(target, '/')) == NULL)
|
|
p = target;
|
|
else
|
|
++p;
|
|
(void)snprintf(path, sizeof(path), "%s/%s", source, p);
|
|
source = path;
|
|
exists = !lstat(source, &sb);
|
|
} else
|
|
exists = !lstat(source, &sb);
|
|
|
|
/*
|
|
* If the file exists, and -f was specified, unlink it.
|
|
* Attempt the link.
|
|
*/
|
|
if ((fflag && exists && unlink(source)) || (*linkf)(target, source)) {
|
|
warn("%s", source);
|
|
return (1);
|
|
}
|
|
if (vflag)
|
|
(void)printf("%s %c> %s\n", source, linkch, target);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "%s\n%s\n%s\n",
|
|
"usage: ln [-fsv] file1 file2",
|
|
" ln [-fsv] file ... directory",
|
|
" link file1 file2");
|
|
exit(1);
|
|
}
|