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util.c revision 1.26 
      1 /*	$NetBSD: util.c,v 1.26 2003/09/14 19:16:07 jschauma Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1989, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Michael Fischbein.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)util.c	8.5 (Berkeley) 4/28/95";
     39 #else
     40 __RCSID("$NetBSD: util.c,v 1.26 2003/09/14 19:16:07 jschauma Exp $");
     41 #endif
     42 #endif /* not lint */
     43 
     44 #include <sys/types.h>
     45 #include <sys/stat.h>
     46 
     47 #include <ctype.h>
     48 #include <err.h>
     49 #include <fts.h>
     50 #include <limits.h>
     51 #include <stdio.h>
     52 #include <stdlib.h>
     53 #include <string.h>
     54 #include <vis.h>
     55 
     56 #include "ls.h"
     57 #include "extern.h"
     58 
     59 int
     60 safe_print(const char *src)
     61 {
     62 	size_t len;
     63 	char *name;
     64 
     65 	len = strlen(src);
     66 	if (len != 0 && SIZE_T_MAX/len <= 4) {
     67 		errx(EXIT_FAILURE, "%s: name too long", src);
     68 		/* NOTREACHED */
     69 	}
     70 
     71 	name = (char *)malloc(4*len+1);
     72 	if (name != NULL) {
     73 		len = strvis(name, src, VIS_NL | VIS_CSTYLE);
     74 		printf("%s", name);
     75 		free(name);
     76 		return len;
     77 	} else
     78 		errx(EXIT_FAILURE, "out of memory!");
     79 		/* NOTREACHED */
     80 }
     81 
     82 int
     83 printescaped(const char *src)
     84 {
     85 	unsigned char c;
     86 	int n;
     87 
     88 	for (n = 0; (c = *src) != '\0'; ++src, ++n)
     89 		if (isprint(c))
     90 			(void)putchar(c);
     91 		else
     92 			(void)putchar('?');
     93 	return n;
     94 }
     95 
     96 void
     97 usage(void)
     98 {
     99 
    100 	(void)fprintf(stderr,
    101 	    "usage: ls [-AabCcdFfgikLlmnopqRrSsTtuWx1] [file ...]\n");
    102 	exit(EXIT_FAILURE);
    103 	/* NOTREACHED */
    104 }
    105