ls.c revision 1591 
1/*
2 * Copyright (c) 1989, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char sccsid[] = "@(#)ls.c	8.1 (Berkeley) 6/6/93";
36#endif /* not lint */
37
38#include <sys/param.h>
39#include <sys/stat.h>
40
41#include <err.h>
42#include <errno.h>
43#include <stdio.h>
44#include <string.h>
45#include <time.h>
46#include <tzfile.h>
47#include <unistd.h>
48#include <utmp.h>
49
50/* Derived from the print routines in the ls(1) source code. */
51
52static void printlink __P((char *));
53static void printtime __P((time_t));
54
55void
56printlong(name, accpath, sb)
57	char *name;			/* filename to print */
58	char *accpath;			/* current valid path to filename */
59	struct stat *sb;		/* stat buffer */
60{
61	char modep[15], *user_from_uid(), *group_from_gid();
62
63	(void)printf("%6lu %4qd ", sb->st_ino, sb->st_blocks);
64	(void)strmode(sb->st_mode, modep);
65	(void)printf("%s %3u %-*s %-*s ", modep, sb->st_nlink, UT_NAMESIZE,
66	    user_from_uid(sb->st_uid, 0), UT_NAMESIZE,
67	    group_from_gid(sb->st_gid, 0));
68
69	if (S_ISCHR(sb->st_mode) || S_ISBLK(sb->st_mode))
70		(void)printf("%3d, %3d ", major(sb->st_rdev),
71		    minor(sb->st_rdev));
72	else
73		(void)printf("%8qd ", sb->st_size);
74	printtime(sb->st_mtime);
75	(void)printf("%s", name);
76	if (S_ISLNK(sb->st_mode))
77		printlink(accpath);
78	(void)putchar('\n');
79}
80
81static void
82printtime(ftime)
83	time_t ftime;
84{
85	int i;
86	char *longstring, *ctime();
87	time_t time();
88
89	longstring = ctime((long *)&ftime);
90	for (i = 4; i < 11; ++i)
91		(void)putchar(longstring[i]);
92
93#define	SIXMONTHS	((DAYSPERNYEAR / 2) * SECSPERDAY)
94	if (ftime + SIXMONTHS > time((time_t *)NULL))
95		for (i = 11; i < 16; ++i)
96			(void)putchar(longstring[i]);
97	else {
98		(void)putchar(' ');
99		for (i = 20; i < 24; ++i)
100			(void)putchar(longstring[i]);
101	}
102	(void)putchar(' ');
103}
104
105static void
106printlink(name)
107	char *name;
108{
109	int lnklen;
110	char path[MAXPATHLEN + 1];
111
112	if ((lnklen = readlink(name, path, MAXPATHLEN)) == -1) {
113		warn("%s", name);
114		return;
115	}
116	path[lnklen] = '\0';
117	(void)printf(" -> %s", path);
118}
119