ftpd.tproj/util.c

   1 /*
   2  * Copyright (c) 1989, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Michael Fischbein.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #ifndef lint
  38 #if 0
  39 static char sccsid[] = "@(#)util.c      8.3 (Berkeley) 4/2/94";
  40 #else
  41 static const char rcsid[] =
  42   "$FreeBSD: src/bin/ls/util.c,v 1.23 2000/07/22 05:28:46 green Exp $";
  43 #endif
  44 #endif /* not lint */
  45
  46 #include <sys/types.h>
  47 #include <sys/stat.h>
  48
  49 #include <ctype.h>
  50 #include <err.h>
  51 #include <fts.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55
  56 #include "ls.h"
  57 #include "ls_extern.h"
  58
  59 int
  60 prn_printable(s)
  61         const char *s;
  62 {
  63         unsigned char c;
  64         int n;
  65
  66         for (n = 0; (c = *s) != '\0'; ++s, ++n)
  67                 if (isprint(c))
  68                         putchar(c);
  69                 else
  70                         putchar('?');
  71         return n;
  72 }
  73
  74 /*
  75  * The fts system makes it difficult to replace fts_name with a different-
  76  * sized string, so we just calculate the real length here and do the
  77  * conversion in prn_octal()
  78  *
  79  * XXX when using f_octal_escape (-b) rather than f_octal (-B), the
  80  * length computed by len_octal may be too big. I just can't be buggered
  81  * to fix this as an efficient fix would involve a lookup table. Same goes
  82  * for the rather inelegant code in prn_octal.
  83  *
  84  *                                              DES 1998/04/23
  85  */
  86
  87 int
  88 len_octal(s, len)
  89         const char *s;
  90         int len;
  91 {
  92         int r = 0;
  93
  94         while (len--)
  95                 if (isprint((unsigned char)*s++)) r++; else r += 4;
  96         return r;
  97 }
  98
  99 int
 100 prn_octal(s)
 101         const char *s;
 102 {
 103         unsigned char ch;
 104         int len = 0;
 105
 106         while ((ch = *s++))
 107         {
 108                 if (isprint(ch) && (ch != '\"') && (ch != '\\'))
 109                         putchar(ch), len++;
 110                 else if (f_octal_escape) {
 111                         putchar('\\');
 112                         switch (ch) {
 113                         case '\\':
 114                                 putchar('\\');
 115                                 break;
 116                         case '\"':
 117                                 putchar('"');
 118                                 break;
 119                         case '\a':
 120                                 putchar('a');
 121                                 break;
 122                         case '\b':
 123                                 putchar('b');
 124                                 break;
 125                         case '\f':
 126                                 putchar('f');
 127                                 break;
 128                         case '\n':
 129                                 putchar('n');
 130                                 break;
 131                         case '\r':
 132                                 putchar('r');
 133                                 break;
 134                         case '\t':
 135                                 putchar('t');
 136                                 break;
 137                         case '\v':
 138                                 putchar('v');
 139                                 break;
 140                         default:
 141                                 putchar('0' + (ch >> 6));
 142                                 putchar('0' + ((ch >> 3) & 7));
 143                                 putchar('0' + (ch & 7));
 144                                 len += 2;
 145                                 break;
 146                         }
 147                         len += 2;
 148                 }
 149                 else {
 150                         putchar('\\');
 151                         putchar('0' + (ch >> 6));
 152                         putchar('0' + ((ch >> 3) & 7));
 153                         putchar('0' + (ch & 7));
 154                         len += 4;
 155                 }
 156         }
 157         return len;
 158 }
 159
 160 void
 161 usage()
 162 {
 163         (void)fprintf(stderr,
 164 #ifdef COLORLS
 165         "usage: ls [-ABCFGHLPRTWabcdfgiklnoqrstu1]"
 166 #else
 167         "usage: ls [-ABCFHLPRTWabcdfgiklnoqrstu1]"
 168 #endif
 169                       " [file ...]\n");
 170         exit(1);
 171 }