usr.bin/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  * @(#)misc.c   8.2 (Berkeley) 4/1/94
  37  * $FreeBSD: src/usr.bin/find/misc.c,v 1.7 2003/06/14 13:00:21 markm Exp $
  38  * $DragonFly: src/usr.bin/find/misc.c,v 1.5 2005/02/14 00:39:04 cpressey Exp $
  39  */
  40
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43
  44 #include <err.h>
  45 #include <errno.h>
  46 #include <fts.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50
  51 #include "find.h"
  52
  53 /*
  54  * brace_subst --
  55  *      Replace occurrences of {} in s1 with s2 and return the result string.
  56  */
  57 void
  58 brace_subst(char *orig, char **store, char *path, int len)
  59 {
  60         int plen;
  61         char ch, *p;
  62
  63         plen = strlen(path);
  64         for (p = *store; (ch = *orig) != '\0'; ++orig)
  65                 if (ch == '{' && orig[1] == '}') {
  66                         while ((p - *store) + plen > len)
  67                                 if (!(*store = realloc(*store, len *= 2)))
  68                                         err(1, NULL);
  69                         memmove(p, path, plen);
  70                         p += plen;
  71                         ++orig;
  72                 } else
  73                         *p++ = ch;
  74         *p = '\0';
  75 }
  76
  77 /*
  78  * queryuser --
  79  *      print a message to standard error and then read input from standard
  80  *      input. If the input is 'y' then 1 is returned.
  81  */
  82 int
  83 queryuser(char *argv[])
  84 {
  85         int ch, first, nl;
  86
  87         fprintf(stderr, "\"%s", *argv);
  88         while (*++argv)
  89                 fprintf(stderr, " %s", *argv);
  90         fprintf(stderr, "\"? ");
  91         fflush(stderr);
  92
  93         first = ch = getchar();
  94         for (nl = 0;;) {
  95                 if (ch == '\n') {
  96                         nl = 1;
  97                         break;
  98                 }
  99                 if (ch == EOF)
 100                         break;
 101                 ch = getchar();
 102         }
 103
 104         if (!nl) {
 105                 fprintf(stderr, "\n");
 106                 fflush(stderr);
 107         }
 108         return (first == 'y');
 109 }