commands/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
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39
  40 #include <err.h>
  41 #include <errno.h>
  42 #include <fts.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47
  48 #include "find.h"
  49
  50 /*
  51  * brace_subst --
  52  *      Replace occurrences of {} in orig with path, and place it in a malloced
  53  *      area of memory set in store.
  54  */
  55 void
  56 brace_subst(char *orig, char **store, char *path, int *len)
  57 {
  58         int nlen, plen, rest;
  59         char ch, *p, *ostore;
  60
  61         plen = strlen(path);
  62         for (p = *store; (ch = *orig) != '\0'; ++orig)
  63                 if (ch == '{' && orig[1] == '}') {
  64                         /* Length of string after the {}. */
  65                         rest = strlen(&orig[2]);
  66
  67                         nlen = *len;
  68                         while ((p - *store) + plen + rest + 1 > nlen)
  69                                 nlen *= 2;
  70
  71                         if (nlen > *len) {
  72                                 ostore = *store;
  73                                 if ((*store = realloc(ostore, nlen)) == NULL)
  74                                         err(1, "realloc");
  75                                 *len = nlen;
  76                                 p += *store - ostore;   /* Relocate. */
  77                         }
  78                         memmove(p, path, plen);
  79                         p += plen;
  80                         ++orig;
  81                 } else
  82                         *p++ = ch;
  83         *p = '\0';
  84 }
  85
  86 /*
  87  * queryuser --
  88  *      print a message to standard error and then read input from standard
  89  *      input. If the input is 'y' then 1 is returned.
  90  */
  91 int
  92 queryuser(char **argv)
  93 {
  94         int ch, first, nl;
  95
  96         (void)fprintf(stderr, "\"%s", *argv);
  97         while (*++argv)
  98                 (void)fprintf(stderr, " %s", *argv);
  99         (void)fprintf(stderr, "\"? ");
 100         (void)fflush(stderr);
 101
 102         first = ch = getchar();
 103         for (nl = 0;;) {
 104                 if (ch == '\n') {
 105                         nl = 1;
 106                         break;
 107                 }
 108                 if (ch == EOF)
 109                         break;
 110                 ch = getchar();
 111         }
 112
 113         if (!nl) {
 114                 (void)fprintf(stderr, "\n");
 115                 (void)fflush(stderr);
 116         }
 117         return (first == 'y');
 118 }
 119
 120 /*
 121  * show_path --
 122  *      called on SIGINFO
 123  */
 124 /* ARGSUSED */
 125 void
 126 show_path(int sig)
 127 {
 128         extern FTSENT *g_entry;
 129         int errno_bak;
 130
 131         if (g_entry == NULL) {
 132                 /*
 133                  * not initialized yet.
 134                  * assumption: pointer assignment is atomic.
 135                  */
 136                 return;
 137         }
 138
 139         errno_bak = errno;
 140         write(STDERR_FILENO, "find path: ", 11);
 141         write(STDERR_FILENO, g_entry->fts_path, g_entry->fts_pathlen);
 142         write(STDERR_FILENO, "\n", 1);
 143         errno = errno_bak;
 144 }