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util.c revision 1.30 
      1 /*	$NetBSD: util.c,v 1.30 2006/12/14 14:15:26 christos 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 1.30 2006/12/14 14:15:26 christos 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 	int flags;
     65 
     66 	flags = VIS_NL | VIS_OCTAL | VIS_WHITE;
     67 	if (f_octal_escape)
     68 		flags |= VIS_CSTYLE;
     69 
     70 	len = strlen(src);
     71 	if (len != 0 && SIZE_T_MAX/len <= 4) {
     72 		errx(EXIT_FAILURE, "%s: name too long", src);
     73 		/* NOTREACHED */
     74 	}
     75 
     76 	name = (char *)malloc(4*len+1);
     77 	if (name != NULL) {
     78 		len = strvis(name, src, flags);
     79 		(void)printf("%s", name);
     80 		free(name);
     81 		return len;
     82 	} else
     83 		errx(EXIT_FAILURE, "out of memory!");
     84 		/* NOTREACHED */
     85 }
     86 
     87 int
     88 printescaped(const char *src)
     89 {
     90 	unsigned char c;
     91 	int n;
     92 
     93 	for (n = 0; (c = *src) != '\0'; ++src, ++n)
     94 		if (isprint(c))
     95 			(void)putchar(c);
     96 		else
     97 			(void)putchar('?');
     98 	return n;
     99 }
    100 
    101 void
    102 usage(void)
    103 {
    104 
    105 	(void)fprintf(stderr,
    106 	    "usage: %s [-AaBbCcdFfghikLlmnopqRrSsTtuWwx1] [file ...]\n",
    107 	    getprogname());
    108 	exit(EXIT_FAILURE);
    109 	/* NOTREACHED */
    110 }
    111