find/misc.c

   1 /*      $NetBSD: misc.c,v 1.7 1998/02/02 14:02:25 mrg Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1990, 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  * Cimarron D. Taylor of the University of California, Berkeley.
   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. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include <sys/cdefs.h>
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "from: @(#)misc.c        8.2 (Berkeley) 4/1/94";
  43 #else
  44 __RCSID("$NetBSD: misc.c,v 1.7 1998/02/02 14:02:25 mrg Exp $");
  45 #endif
  46 #endif /* not lint */
  47
  48 #include <sys/types.h>
  49 #include <sys/stat.h>
  50
  51 #include <err.h>
  52 #include <errno.h>
  53 #include <fts.h>
  54 #include <stdio.h>
  55 #include <stdlib.h>
  56 #include <string.h>
  57
  58 #include "find.h"
  59
  60 /*
  61  * brace_subst --
  62  *      Replace occurrences of {} in orig with path, and place it in a malloced
  63  *      area of memory set in store.
  64  */
  65 void
  66 brace_subst(orig, store, path, len)
  67         char *orig, **store, *path;
  68         int len;
  69 {
  70         int plen;
  71         char ch, *p;
  72
  73         plen = strlen(path);
  74         for (p = *store; (ch = *orig) != '\0'; ++orig)
  75                 if (ch == '{' && orig[1] == '}') {
  76                         while ((p - *store) + plen > len)
  77                                 if (!(*store = realloc(*store, len *= 2)))
  78                                         err(1, "realloc");
  79                         memmove(p, path, plen);
  80                         p += plen;
  81                         ++orig;
  82                 } else
  83                         *p++ = ch;
  84         *p = '\0';
  85 }
  86
  87 /*
  88  * queryuser --
  89  *      print a message to standard error and then read input from standard
  90  *      input. If the input is 'y' then 1 is returned.
  91  */
  92 int
  93 queryuser(argv)
  94         char **argv;
  95 {
  96         int ch, first, nl;
  97
  98         (void)fprintf(stderr, "\"%s", *argv);
  99         while (*++argv)
 100                 (void)fprintf(stderr, " %s", *argv);
 101         (void)fprintf(stderr, "\"? ");
 102         (void)fflush(stderr);
 103
 104         first = ch = getchar();
 105         for (nl = 0;;) {
 106                 if (ch == '\n') {
 107                         nl = 1;
 108                         break;
 109                 }
 110                 if (ch == EOF)
 111                         break;
 112                 ch = getchar();
 113         }
 114
 115         if (!nl) {
 116                 (void)fprintf(stderr, "\n");
 117                 (void)fflush(stderr);
 118         }
 119         return (first == 'y');
 120 }
 121
 122 /*
 123  * emalloc --
 124  *      malloc with error checking.
 125  */
 126 void *
 127 emalloc(len)
 128         u_int len;
 129 {
 130         void *p;
 131
 132         if ((p = malloc(len)) == NULL)
 133                 err(1, "malloc");
 134         return (p);
 135 }