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ls.c revision 1.1.1.2 
      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
     35 static 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 
     52 static void printlink __P((char *));
     53 static void printtime __P((time_t));
     54 
     55 void
     56 printlong(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 
     81 static void
     82 printtime(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 
    105 static void
    106 printlink(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