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. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * @(#)misc.c   8.2 (Berkeley) 4/1/94
  33  * $FreeBSD: head/usr.bin/find/misc.c 216370 2010-12-11 08:32:16Z joel $
  34  */
  35
  36 #include <sys/types.h>
  37 #include <sys/stat.h>
  38
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <fts.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45
  46 #include "find.h"
  47
  48 /*
  49  * brace_subst --
  50  *      Replace occurrences of {} in s1 with s2 and return the result string.
  51  */
  52 void
  53 brace_subst(char *orig, char **store, char *path, int len)
  54 {
  55         int plen;
  56         char ch, *p;
  57
  58         plen = strlen(path);
  59         for (p = *store; (ch = *orig) != '\0'; ++orig)
  60                 if (ch == '{' && orig[1] == '}') {
  61                         while ((p - *store) + plen > len)
  62                                 if (!(*store = realloc(*store, len *= 2)))
  63                                         err(1, NULL);
  64                         memmove(p, path, plen);
  65                         p += plen;
  66                         ++orig;
  67                 } else
  68                         *p++ = ch;
  69         *p = '\0';
  70 }
  71
  72 /*
  73  * queryuser --
  74  *      print a message to standard error and then read input from standard
  75  *      input. If the input is an affirmative response (according to the
  76  *      current locale) then 1 is returned.
  77  */
  78 int
  79 queryuser(char *argv[])
  80 {
  81         char *p, resp[256];
  82
  83         (void)fprintf(stderr, "\"%s", *argv);
  84         while (*++argv)
  85                 (void)fprintf(stderr, " %s", *argv);
  86         (void)fprintf(stderr, "\"? ");
  87         (void)fflush(stderr);
  88
  89         if (fgets(resp, sizeof(resp), stdin) == NULL)
  90                 *resp = '\0';
  91         if ((p = strchr(resp, '\n')) != NULL)
  92                 *p = '\0';
  93         else {
  94                 (void)fprintf(stderr, "\n");
  95                 (void)fflush(stderr);
  96         }
  97 #ifdef BOOTSTRAPPING
  98         return (resp[0] == 'y');
  99 #else
 100         return (rpmatch(resp) == 1);
 101 #endif
 102 }