find/misc.c

   1 /*-
   2  * Copyright (c) 1990, 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  * Cimarron D. Taylor of the University of California, Berkeley.
   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[] = "@(#)misc.c      8.2 (Berkeley) 4/1/94";
  40 #else
  41 static const char rcsid[] =
  42   "$FreeBSD: src/usr.bin/find/misc.c,v 1.2.12.1 2000/06/23 18:38:46 roberto Exp $";
  43 #endif
  44 #endif /* not lint */
  45
  46 #include <sys/types.h>
  47 #include <sys/stat.h>
  48
  49 #include <err.h>
  50 #include <errno.h>
  51 #include <fts.h>
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55
  56 #include "find.h"
  57
  58 /*
  59  * brace_subst --
  60  *      Replace occurrences of {} in s1 with s2 and return the result string.
  61  */
  62 void
  63 brace_subst(orig, store, path, len)
  64         char *orig, **store, *path;
  65         int len;
  66 {
  67         register int plen;
  68         register char ch, *p;
  69
  70         plen = strlen(path);
  71         for (p = *store; (ch = *orig) != '\0'; ++orig)
  72                 if (ch == '{' && orig[1] == '}') {
  73                         while ((p - *store) + plen > len)
  74                                 if (!(*store = realloc(*store, len *= 2)))
  75                                         err(1, NULL);
  76                         memmove(p, path, plen);
  77                         p += plen;
  78                         ++orig;
  79                 } else
  80                         *p++ = ch;
  81         *p = '\0';
  82 }
  83
  84 /*
  85  * queryuser --
  86  *      print a message to standard error and then read input from standard
  87  *      input. If the input is 'y' then 1 is returned.
  88  */
  89 int
  90 queryuser(argv)
  91         register char **argv;
  92 {
  93         int ch, first, nl;
  94
  95         (void)fprintf(stderr, "\"%s", *argv);
  96         while (*++argv)
  97                 (void)fprintf(stderr, " %s", *argv);
  98         (void)fprintf(stderr, "\"? ");
  99         (void)fflush(stderr);
 100
 101         first = ch = getchar();
 102         for (nl = 0;;) {
 103                 if (ch == '\n') {
 104                         nl = 1;
 105                         break;
 106                 }
 107                 if (ch == EOF)
 108                         break;
 109                 ch = getchar();
 110         }
 111
 112         if (!nl) {
 113                 (void)fprintf(stderr, "\n");
 114                 (void)fflush(stderr);
 115         }
 116         return (first == 'y');
 117 }
 118
 119 /*
 120  * emalloc --
 121  *      malloc with error checking.
 122  */
 123 void *
 124 emalloc(len)
 125         u_int len;
 126 {
 127         void *p;
 128
 129         if ((p = malloc(len)) == NULL)
 130                 err(1, NULL);
 131         return (p);
 132 }