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  * 4. 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
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)misc.c      8.2 (Berkeley) 4/1/94";
  36 #else
  37 #endif
  38 #endif /* not lint */
  39
  40 #include <sys/cdefs.h>
  41 __FBSDID("$FreeBSD$");
  42
  43 #include <sys/types.h>
  44 #include <sys/stat.h>
  45
  46 #include <err.h>
  47 #include <errno.h>
  48 #include <fts.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52
  53 #include "find.h"
  54
  55 /*
  56  * brace_subst --
  57  *      Replace occurrences of {} in s1 with s2 and return the result string.
  58  */
  59 void
  60 brace_subst(char *orig, char **store, char *path, size_t len)
  61 {
  62         const char *pastorigend, *p, *q;
  63         char *dst;
  64         size_t newlen, plen;
  65
  66         plen = strlen(path);
  67         newlen = strlen(orig) + 1;
  68         pastorigend = orig + newlen;
  69         for (p = orig; (q = strstr(p, "{}")) != NULL; p = q + 2) {
  70                 if (plen > 2 && newlen + plen - 2 < newlen)
  71                         errx(2, "brace_subst overflow");
  72                 newlen += plen - 2;
  73         }
  74         if (newlen > len) {
  75                 *store = reallocf(*store, newlen);
  76                 if (*store == NULL)
  77                         err(2, NULL);
  78         }
  79         dst = *store;
  80         for (p = orig; (q = strstr(p, "{}")) != NULL; p = q + 2) {
  81                 memcpy(dst, p, q - p);
  82                 dst += q - p;
  83                 memcpy(dst, path, plen);
  84                 dst += plen;
  85         }
  86         memcpy(dst, p, pastorigend - p);
  87 }
  88
  89 /*
  90  * queryuser --
  91  *      print a message to standard error and then read input from standard
  92  *      input. If the input is an affirmative response (according to the
  93  *      current locale) then 1 is returned.
  94  */
  95 int
  96 queryuser(char *argv[])
  97 {
  98         char *p, resp[256];
  99
 100         (void)fprintf(stderr, "\"%s", *argv);
 101         while (*++argv)
 102                 (void)fprintf(stderr, " %s", *argv);
 103         (void)fprintf(stderr, "\"? ");
 104         (void)fflush(stderr);
 105
 106         if (fgets(resp, sizeof(resp), stdin) == NULL)
 107                 *resp = '\0';
 108         if ((p = strchr(resp, '\n')) != NULL)
 109                 *p = '\0';
 110         else {
 111                 (void)fprintf(stderr, "\n");
 112                 (void)fflush(stderr);
 113         }
 114         return (rpmatch(resp) == 1);
 115 }