usr.bin/find/main.c

   1 /*      $NetBSD: main.c,v 1.27 2007/07/19 07:49:30 daniel 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[] = "@(#)main.c      8.4 (Berkeley) 5/4/95";
  39 #else
  40 __COPYRIGHT("@(#) Copyright (c) 1990, 1993, 1994\
  41  The Regents of the University of California.  All rights reserved.");
  42 __RCSID("$NetBSD: main.c,v 1.27 2007/07/19 07:49:30 daniel Exp $");
  43 #endif
  44 #endif /* not lint */
  45
  46 #include <sys/types.h>
  47 #include <sys/stat.h>
  48
  49 #include <err.h>
  50 #include <errno.h>
  51 #include <fcntl.h>
  52 #include <fts.h>
  53 #include <signal.h>
  54 #include <locale.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58 #include <time.h>
  59 #include <unistd.h>
  60
  61 #include "find.h"
  62
  63 time_t now;                     /* time find was run */
  64 int dotfd;                      /* starting directory */
  65 int ftsoptions;                 /* options for the ftsopen(3) call */
  66 int isdeprecated;               /* using deprecated syntax */
  67 int isdepth;                    /* do directories on post-order visit */
  68 int isoutput;                   /* user specified output operator */
  69 int issort;                     /* sort directory entries */
  70 int isxargs;                    /* don't permit xargs delimiting chars */
  71 int regcomp_flags = REG_BASIC;  /* regex compilation flags */
  72
  73 int main(int, char **);
  74 static void usage(void);
  75
  76 int
  77 main(int argc, char *argv[])
  78 {
  79         struct sigaction sa;
  80         char **p, **start;
  81         int ch;
  82
  83         (void)time(&now);       /* initialize the time-of-day */
  84         (void)setlocale(LC_ALL, "");
  85
  86         memset(&sa, 0, sizeof(sa));
  87         sa.sa_flags = SA_RESTART;
  88         sa.sa_handler = show_path;
  89         sigaction(SIGINFO, &sa, NULL);
  90
  91         /* array to hold dir list.  at most (argc - 1) elements. */
  92         p = start = malloc(argc * sizeof (char *));
  93         if (p == NULL)
  94                 err(1, NULL);
  95
  96         ftsoptions = FTS_NOSTAT | FTS_PHYSICAL;
  97         while ((ch = getopt(argc, argv, "HLPdEf:hsXx")) != -1)
  98                 switch (ch) {
  99                 case 'H':
 100                         ftsoptions &= ~FTS_LOGICAL;
 101                         ftsoptions |= FTS_PHYSICAL|FTS_COMFOLLOW;
 102                         break;
 103                 case 'L':
 104                         ftsoptions &= ~(FTS_COMFOLLOW|FTS_PHYSICAL);
 105                         ftsoptions |= FTS_LOGICAL;
 106                         break;
 107                 case 'P':
 108                         ftsoptions &= ~(FTS_COMFOLLOW|FTS_LOGICAL);
 109                         ftsoptions |= FTS_PHYSICAL;
 110                         break;
 111                 case 'd':
 112                         isdepth = 1;
 113                         break;
 114                 case 'E':
 115                         regcomp_flags = REG_EXTENDED;
 116                         break;
 117                 case 'f':
 118                         *p++ = optarg;
 119                         break;
 120                 case 'h':
 121                         ftsoptions &= ~FTS_PHYSICAL;
 122                         ftsoptions |= FTS_LOGICAL;
 123                         break;
 124                 case 's':
 125                         issort = 1;
 126                         break;
 127                 case 'X':
 128                         isxargs = 1;
 129                         break;
 130                 case 'x':
 131                         ftsoptions |= FTS_XDEV;
 132                         break;
 133                 case '?':
 134                 default:
 135                         break;
 136                 }
 137
 138         argc -= optind;
 139         argv += optind;
 140
 141         /*
 142          * Find first option to delimit the file list.  The first argument
 143          * that starts with a -, or is a ! or a ( must be interpreted as a
 144          * part of the find expression, according to POSIX .2.
 145          */
 146         for (; *argv != NULL; *p++ = *argv++) {
 147                 if (argv[0][0] == '-')
 148                         break;
 149                 if ((argv[0][0] == '!' || argv[0][0] == '(') &&
 150                     argv[0][1] == '\0')
 151                         break;
 152         }
 153
 154         if (p == start)
 155                 usage();
 156
 157         *p = NULL;
 158
 159         if ((dotfd = open(".", O_RDONLY, 0)) == -1 ||
 160             fcntl(dotfd, F_SETFD, FD_CLOEXEC) == -1)
 161                 err(1, ".");
 162
 163         exit(find_execute(find_formplan(argv), start));
 164 }
 165
 166 static void
 167 usage(void)
 168 {
 169
 170         (void)fprintf(stderr,
 171 "usage: find [-H | -L | -P] [-dEhsXx] [-f file] file [file ...] [expression]\n");
 172         exit(1);
 173 }