commands/find/main.c

   1 /*      $NetBSD: main.c,v 1.28 2008/07/21 14:19:22 lukem 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 <fcntl.h>
  43 #include <fts.h>
  44 #include <signal.h>
  45 #include <locale.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <time.h>
  50 #include <unistd.h>
  51
  52 #include "find.h"
  53
  54 time_t now;                     /* time find was run */
  55 int dotfd;                      /* starting directory */
  56 int ftsoptions;                 /* options for the ftsopen(3) call */
  57 int isdeprecated;               /* using deprecated syntax */
  58 int isdepth;                    /* do directories on post-order visit */
  59 int isoutput;                   /* user specified output operator */
  60 int issort;                     /* sort directory entries */
  61 int isxargs;                    /* don't permit xargs delimiting chars */
  62 int regcomp_flags = REG_BASIC;  /* regex compilation flags */
  63
  64 int main(int, char **);
  65 static void usage(void);
  66
  67 int
  68 main(int argc, char *argv[])
  69 {
  70         struct sigaction sa;
  71         char **p, **start;
  72         int ch;
  73
  74         (void)time(&now);       /* initialize the time-of-day */
  75         (void)setlocale(LC_ALL, "");
  76
  77         memset(&sa, 0, sizeof(sa));
  78         sa.sa_flags = SA_RESTART;
  79         sa.sa_handler = show_path;
  80 #ifdef SIGINFO
  81         sigaction(SIGINFO, &sa, NULL);
  82 #endif
  83
  84         /* array to hold dir list.  at most (argc - 1) elements. */
  85         p = start = malloc(argc * sizeof (char *));
  86         if (p == NULL)
  87                 err(1, NULL);
  88
  89         ftsoptions = FTS_NOSTAT | FTS_PHYSICAL;
  90         while ((ch = getopt(argc, argv, "HLPdEf:hsXx")) != -1)
  91                 switch (ch) {
  92                 case 'H':
  93                         ftsoptions &= ~FTS_LOGICAL;
  94                         ftsoptions |= FTS_PHYSICAL|FTS_COMFOLLOW;
  95                         break;
  96                 case 'L':
  97                         ftsoptions &= ~(FTS_COMFOLLOW|FTS_PHYSICAL);
  98                         ftsoptions |= FTS_LOGICAL;
  99                         break;
 100                 case 'P':
 101                         ftsoptions &= ~(FTS_COMFOLLOW|FTS_LOGICAL);
 102                         ftsoptions |= FTS_PHYSICAL;
 103                         break;
 104                 case 'd':
 105                         isdepth = 1;
 106                         break;
 107                 case 'E':
 108                         regcomp_flags = REG_EXTENDED;
 109                         break;
 110                 case 'f':
 111                         *p++ = optarg;
 112                         break;
 113                 case 'h':
 114                         ftsoptions &= ~FTS_PHYSICAL;
 115                         ftsoptions |= FTS_LOGICAL;
 116                         break;
 117                 case 's':
 118                         issort = 1;
 119                         break;
 120                 case 'X':
 121                         isxargs = 1;
 122                         break;
 123                 case 'x':
 124                         ftsoptions |= FTS_XDEV;
 125                         break;
 126                 case '?':
 127                 default:
 128                         break;
 129                 }
 130
 131         argc -= optind;
 132         argv += optind;
 133
 134         /*
 135          * Find first option to delimit the file list.  The first argument
 136          * that starts with a -, or is a ! or a ( must be interpreted as a
 137          * part of the find expression, according to POSIX .2.
 138          */
 139         for (; *argv != NULL; *p++ = *argv++) {
 140                 if (argv[0][0] == '-')
 141                         break;
 142                 if ((argv[0][0] == '!' || argv[0][0] == '(') &&
 143                     argv[0][1] == '\0')
 144                         break;
 145         }
 146
 147         if (p == start)
 148                 usage();
 149
 150         *p = NULL;
 151
 152         if ((dotfd = open(".", O_RDONLY, 0)) == -1 ||
 153             fcntl(dotfd, F_SETFD, FD_CLOEXEC) == -1)
 154                 err(1, ".");
 155
 156         exit(find_execute(find_formplan(argv), start));
 157 }
 158
 159 static void
 160 usage(void)
 161 {
 162
 163         (void)fprintf(stderr,
 164 "usage: find [-H | -L | -P] [-dEhsXx] [-f file] file [file ...] [expression]\n");
 165         exit(1);
 166 }