ls.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 4. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef lint
33#if 0
34static char sccsid[] = "@(#)ls.c	8.1 (Berkeley) 6/6/93";
35#endif
36#endif /* not lint */
37
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD: stable/11/usr.bin/find/ls.c 330897 2018-03-14 03:19:51Z eadler $");
40
41#include <sys/param.h>
42#include <sys/stat.h>
43
44#include <err.h>
45#include <errno.h>
46#include <fts.h>
47#include <grp.h>
48#include <inttypes.h>
49#include <langinfo.h>
50#include <pwd.h>
51#include <stdio.h>
52#include <string.h>
53#include <time.h>
54#include <unistd.h>
55
56#include "find.h"
57
58/* Derived from the print routines in the ls(1) source code. */
59
60static void printlink(char *);
61static void printtime(time_t);
62
63void
64printlong(char *name, char *accpath, struct stat *sb)
65{
66	char modep[15];
67
68	(void)printf("%6ju %8"PRId64" ", (uintmax_t)sb->st_ino, sb->st_blocks);
69	(void)strmode(sb->st_mode, modep);
70	(void)printf("%s %3ju %-*s %-*s ", modep, (uintmax_t)sb->st_nlink,
71	    MAXLOGNAME - 1,
72	    user_from_uid(sb->st_uid, 0), MAXLOGNAME - 1,
73	    group_from_gid(sb->st_gid, 0));
74
75	if (S_ISCHR(sb->st_mode) || S_ISBLK(sb->st_mode))
76		(void)printf("%#8jx ", (uintmax_t)sb->st_rdev);
77	else
78		(void)printf("%8"PRId64" ", sb->st_size);
79	printtime(sb->st_mtime);
80	(void)printf("%s", name);
81	if (S_ISLNK(sb->st_mode))
82		printlink(accpath);
83	(void)putchar('\n');
84}
85
86static void
87printtime(time_t ftime)
88{
89	char longstring[80];
90	static time_t lnow;
91	const char *format;
92	static int d_first = -1;
93
94	if (d_first < 0)
95		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
96	if (lnow == 0)
97		lnow = time(NULL);
98
99#define	SIXMONTHS	((365 / 2) * 86400)
100	if (ftime + SIXMONTHS > lnow && ftime < lnow + SIXMONTHS)
101		/* mmm dd hh:mm || dd mmm hh:mm */
102		format = d_first ? "%e %b %R " : "%b %e %R ";
103	else
104		/* mmm dd  yyyy || dd mmm  yyyy */
105		format = d_first ? "%e %b  %Y " : "%b %e  %Y ";
106	strftime(longstring, sizeof(longstring), format, localtime(&ftime));
107	fputs(longstring, stdout);
108}
109
110static void
111printlink(char *name)
112{
113	int lnklen;
114	char path[MAXPATHLEN];
115
116	if ((lnklen = readlink(name, path, MAXPATHLEN - 1)) == -1) {
117		warn("%s", name);
118		return;
119	}
120	path[lnklen] = '\0';
121	(void)printf(" -> %s", path);
122}
123