usr.bin/find/misc.c

   1 /*      $NetBSD: misc.c,v 1.14 2006/10/11 19:51:10 apb 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. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "from: @(#)misc.c        8.2 (Berkeley) 4/1/94";
  39 #else
  40 __RCSID("$NetBSD: misc.c,v 1.14 2006/10/11 19:51:10 apb Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include <sys/types.h>
  45 #include <sys/stat.h>
  46
  47 #include <err.h>
  48 #include <errno.h>
  49 #include <fts.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <unistd.h>
  54
  55 #include "find.h"
  56
  57 /*
  58  * brace_subst --
  59  *      Replace occurrences of {} in orig with path, and place it in a malloced
  60  *      area of memory set in store.
  61  */
  62 void
  63 brace_subst(char *orig, char **store, char *path, int *len)
  64 {
  65         int nlen, plen, rest;
  66         char ch, *p, *ostore;
  67
  68         plen = strlen(path);
  69         for (p = *store; (ch = *orig) != '\0'; ++orig)
  70                 if (ch == '{' && orig[1] == '}') {
  71                         /* Length of string after the {}. */
  72                         rest = strlen(&orig[2]);
  73
  74                         nlen = *len;
  75                         while ((p - *store) + plen + rest + 1 > nlen)
  76                                 nlen *= 2;
  77
  78                         if (nlen > *len) {
  79                                 ostore = *store;
  80                                 if ((*store = realloc(ostore, nlen)) == NULL)
  81                                         err(1, "realloc");
  82                                 *len = nlen;
  83                                 p += *store - ostore;   /* Relocate. */
  84                         }
  85                         memmove(p, path, plen);
  86                         p += plen;
  87                         ++orig;
  88                 } else
  89                         *p++ = ch;
  90         *p = '\0';
  91 }
  92
  93 /*
  94  * queryuser --
  95  *      print a message to standard error and then read input from standard
  96  *      input. If the input is 'y' then 1 is returned.
  97  */
  98 int
  99 queryuser(char **argv)
 100 {
 101         int ch, first, nl;
 102
 103         (void)fprintf(stderr, "\"%s", *argv);
 104         while (*++argv)
 105                 (void)fprintf(stderr, " %s", *argv);
 106         (void)fprintf(stderr, "\"? ");
 107         (void)fflush(stderr);
 108
 109         first = ch = getchar();
 110         for (nl = 0;;) {
 111                 if (ch == '\n') {
 112                         nl = 1;
 113                         break;
 114                 }
 115                 if (ch == EOF)
 116                         break;
 117                 ch = getchar();
 118         }
 119
 120         if (!nl) {
 121                 (void)fprintf(stderr, "\n");
 122                 (void)fflush(stderr);
 123         }
 124         return (first == 'y');
 125 }
 126
 127 /*
 128  * show_path --
 129  *      called on SIGINFO
 130  */
 131 /* ARGSUSED */
 132 void
 133 show_path(int sig)
 134 {
 135         extern FTSENT *g_entry;
 136         int errno_bak;
 137
 138         if (g_entry == NULL) {
 139                 /*
 140                  * not initialized yet.
 141                  * assumption: pointer assignment is atomic.
 142                  */
 143                 return;
 144         }
 145
 146         errno_bak = errno;
 147         write(STDERR_FILENO, "find path: ", 11);
 148         write(STDERR_FILENO, g_entry->fts_path, g_entry->fts_pathlen);
 149         write(STDERR_FILENO, "\n", 1);
 150         errno = errno_bak;
 151 }