 @@ -1,365 +1,365 @@
-/*	$NetBSD: ln.c,v 1.39 2017/04/22 12:22:31 kre Exp $	*/
+/*	$NetBSD: ln.c,v 1.40 2018/08/26 23:01:06 sevan Exp $	*/
 /*-
  * 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. 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.
  */
 #if 0
 #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
 static char sccsid[] = "@(#)ln.c	8.2 (Berkeley) 3/31/94";
 #endif /* not lint */
 #endif
 #include <sys/cdefs.h>
 #ifdef __FBSDID
 __FBSDID("$FreeBSD: head/bin/ln/ln.c 251261 2013-06-02 17:55:00Z eadler $");
 #endif
-__RCSID("$NetBSD: ln.c,v 1.39 2017/04/22 12:22:31 kre Exp $");
+__RCSID("$NetBSD: ln.c,v 1.40 2018/08/26 23:01:06 sevan Exp $");
 #include <sys/param.h>
 #include <sys/stat.h>
 #include <err.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <libgen.h>
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 static int	fflag;			/* Unlink existing files. */
 static int	Fflag;			/* Remove empty directories also. */
 static int	hflag;			/* Check new name for symlink first. */
 static int	iflag;			/* Interactive mode. */
 static int	Pflag;			/* Create hard links to symlinks. */
 static int	sflag;			/* Symbolic, not hard, link. */
 static int	vflag;			/* Verbose output. */
 static int	wflag;			/* Warn if symlink target does not
 					 * exist, and -f is not enabled. */
 static char	linkch;
 static int	linkit(const char *, const char *, int);
 static __dead void	usage(void);
 int
 main(int argc, char *argv[])
+{
 	struct stat sb;
 	char *p, *targetdir;
 	int ch, exitval;
 	/*
 	 * Test for the special case where the utility is called as
 	 * "link", for which the functionality provided is greatly
 	 * simplified.
 	 */
 	if ((p = strrchr(argv[0], '/')) == NULL)
 		p = argv[0];
 	else
 		++p;
 	if (strcmp(p, "link") == 0) {
 		while (getopt(argc, argv, "") != -1)
 			usage();
 		argc -= optind;
 		argv += optind;
 		if (argc != 2)
 			usage();
 		if (link(argv[0], argv[1]) == -1)
 			err(EXIT_FAILURE, NULL);
 		exit(EXIT_SUCCESS);
+	}
 	while ((ch = getopt(argc, argv, "FLPfhinsvw")) != -1)
 		switch (ch) {
 		case 'F':
 			Fflag = 1;
 			break;
 		case 'L':
 			Pflag = 0;
 			break;
 		case 'P':
 			Pflag = 1;
 			break;
 		case 'f':
 			fflag = 1;
 			iflag = 0;
 			wflag = 0;
 			break;
 		case 'h':
 		case 'n':
 			hflag = 1;
 			break;
 		case 'i':
 			iflag = 1;
 			fflag = 0;
 			break;
 		case 's':
 			sflag = 1;
 			break;
 		case 'v':
 			vflag = 1;
 			break;
 		case 'w':
 			wflag = 1;
 			break;
 		case '?':
 		default:
 			usage();
+		}
 	argv += optind;
 	argc -= optind;
 	linkch = sflag ? '-' : '=';
 	if (sflag == 0)
 		Fflag = 0;
 	if (Fflag == 1 && iflag == 0) {
 		fflag = 1;
 		wflag = 0;		/* Implied when fflag != 0 */
+	}
 	switch(argc) {
 	case 0:
 		usage();
 		/* NOTREACHED */
 	case 1:				/* ln source */
 		exit(linkit(argv[0], ".", 1));
 	case 2:				/* ln source target */
 		exit(linkit(argv[0], argv[1], 0));
 	default:
+		;
+	}
 					/* ln source1 source2 directory */
 	targetdir = argv[argc - 1];
 	if (hflag && lstat(targetdir, &sb) == 0 && S_ISLNK(sb.st_mode)) {
 		/*
 		 * We were asked not to follow symlinks, but found one at
 		 * the target--simulate "not a directory" error
 		 */
 		errno = ENOTDIR;
 		err(1, "%s", targetdir);
+	}
 	if (stat(targetdir, &sb))
 		err(1, "%s", targetdir);
 	if (!S_ISDIR(sb.st_mode))
 		usage();
 	for (exitval = 0; *argv != targetdir; ++argv)
 		exitval |= linkit(*argv, targetdir, 1);
 	exit(exitval);
+}
 /*
  * Two pathnames refer to the same directory entry if the directories match
  * and the final components' names match.
  */
 static int
 samedirent(const char *path1, const char *path2)
+{
 	const char *file1, *file2;
 	char pathbuf[PATH_MAX];
 	struct stat sb1, sb2;
 	if (strcmp(path1, path2) == 0)
 		return 1;
 	file1 = strrchr(path1, '/');
 	if (file1 != NULL)
 		file1++;
 	else
 		file1 = path1;
 	file2 = strrchr(path2, '/');
 	if (file2 != NULL)
 		file2++;
 	else
 		file2 = path2;
 	if (strcmp(file1, file2) != 0)
 		return 0;
 	if (file1 - path1 >= PATH_MAX || file2 - path2 >= PATH_MAX)
 		return 0;
 	if (file1 == path1)
 		memcpy(pathbuf, ".", 2);
 	else {
 		memcpy(pathbuf, path1, file1 - path1);
 		pathbuf[file1 - path1] = '\0';
+	}
 	if (stat(pathbuf, &sb1) != 0)
 		return 0;
 	if (file2 == path2)
 		memcpy(pathbuf, ".", 2);
 	else {
 		memcpy(pathbuf, path2, file2 - path2);
 		pathbuf[file2 - path2] = '\0';
+	}
 	if (stat(pathbuf, &sb2) != 0)
 		return 0;
 	return sb1.st_dev == sb2.st_dev && sb1.st_ino == sb2.st_ino;
+}
 static int
 linkit(const char *source, const char *target, int isdir)
+{
 	struct stat sb;
 	const char *p;
 	int ch, exists, first;
 	char path[PATH_MAX];
 	char wbuf[PATH_MAX];
 	char bbuf[PATH_MAX];
 	if (!sflag) {
 		/* If source doesn't exist, quit now. */
 		if ((Pflag ? lstat : stat)(source, &sb)) {
 			warn("%s", source);
 			return (1);
+		}
 		/* Only symbolic links to directories. */
 		if (S_ISDIR(sb.st_mode)) {
 			errno = EISDIR;
 			warn("%s", source);
 			return (1);
+		}
+	}
 	/*
 	 * If the target is a directory (and not a symlink if hflag),
 	 * append the source's name.
 	 */
 	if (isdir ||
 	    (lstat(target, &sb) == 0 && S_ISDIR(sb.st_mode)) ||
 	    (!hflag && stat(target, &sb) == 0 && S_ISDIR(sb.st_mode))) {
 		if (strlcpy(bbuf, source, sizeof(bbuf)) >= sizeof(bbuf) ||
 		    (p = basename(bbuf)) == NULL ||
 		    snprintf(path, sizeof(path), "%s/%s", target, p) >=
 		    (ssize_t)sizeof(path)) {
 			errno = ENAMETOOLONG;
 			warn("%s", source);
 			return (1);
+		}
 		target = path;
+	}
 	/*
 	 * If the link source doesn't exist, and a symbolic link was
 	 * requested, and -w was specified, give a warning.
 	 */
 	if (sflag && wflag) {
 		if (*source == '/') {
 			/* Absolute link source. */
 			if (stat(source, &sb) != 0)
 				 warn("warning: %s inaccessible", source);
 		} else {
 			/*
 			 * Relative symlink source.  Try to construct the
 			 * absolute path of the source, by appending `source'
 			 * to the parent directory of the target.
 			 */
 			strlcpy(bbuf, target, sizeof(bbuf));
 			p = dirname(bbuf);
 			if (p != NULL) {
 				(void)snprintf(wbuf, sizeof(wbuf), "%s/%s",
 						p, source);
 				if (stat(wbuf, &sb) != 0)
 					warn("warning: %s", source);
+			}
+		}
+	}
 	/*
 	 * If the file exists, first check it is not the same directory entry.
 	 */
 	exists = !lstat(target, &sb);
 	if (exists) {
 		if (!sflag && samedirent(source, target)) {
 			warnx("%s and %s are the same directory entry",
 			    source, target);
 			return (1);
+		}
+	}
 	/*
 	 * Then unlink it forcibly if -f was specified
 	 * and interactively if -i was specified.
 	 */
 	if (fflag && exists) {
 		if (Fflag && S_ISDIR(sb.st_mode)) {
 			if (rmdir(target)) {
 				warn("%s", target);
 				return (1);
+			}
 		} else if (unlink(target)) {
 			warn("%s", target);
 			return (1);
+		}
 	} else if (iflag && exists) {
 		fflush(stdout);
 		fprintf(stderr, "replace %s? ", target);
 		first = ch = getchar();
 		while(ch != '\n' && ch != EOF)
 			ch = getchar();
 		if (first != 'y' && first != 'Y') {
 			fprintf(stderr, "not replaced\n");
 			return (1);
+		}
 		if (Fflag && S_ISDIR(sb.st_mode)) {
 			if (rmdir(target)) {
 				warn("%s", target);
 				return (1);
+			}
 		} else if (unlink(target)) {
 			warn("%s", target);
 			return (1);
+		}
+	}
 	/* Attempt the link. */
 	if (sflag ? symlink(source, target) :
 	    linkat(AT_FDCWD, source, AT_FDCWD, target,
 	    Pflag ? 0 : AT_SYMLINK_FOLLOW)) {
 		warn("%s", target);
 		return (1);
+	}
 	if (vflag)
 		(void)printf("%s %c> %s\n", target, linkch, source);
 	return (0);
+}
 static __dead void
 usage(void)
+{
 	(void)fprintf(stderr,
-	    "usage: %s [-s [-F] | -L | -P] [-f | -i] [-hnv] source_file [target_file]\n"
+	    "usage: %s [-L | -P | -s [-F]] [-f | -iw] [-hnv] source_file [target_file]\n"
-	    "       %s [-s [-F] | -L | -P] [-f | -i] [-hnv] source_file ... target_dir\n"
+	    "       %s [-L | -P | -s [-F]] [-f | -iw] [-hnv] source_file ... target_dir\n"
 	    "       link source_file target_file\n", getprogname(), getprogname());
 	exit(1);
+}