usr.bin/find/main.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  * 3. 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  * @(#) Copyright (c) 1990, 1993, 1994 The Regents of the University of California.  All rights reserved.
  33  * @(#)main.c   8.4 (Berkeley) 5/4/95
  34  * $FreeBSD: head/usr.bin/find/main.c 246628 2013-02-10 18:56:37Z jilles $
  35  */
  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 <locale.h>
  45 #include <regex.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <time.h>
  49 #include <unistd.h>
  50
  51 #include "find.h"
  52
  53 time_t now;                     /* time find was run */
  54 int dotfd;                      /* starting directory */
  55 int ftsoptions;                 /* options for the ftsopen(3) call */
  56 int ignore_readdir_race;        /* ignore readdir race */
  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;                     /* do hierarchies in lexicographical order */
  61 int isxargs;                    /* don't permit xargs delimiting chars */
  62 int mindepth = -1, maxdepth = -1; /* minimum and maximum depth */
  63 int regexp_flags = REG_BASIC;   /* use the "basic" regexp by default*/
  64
  65 static void usage(void);
  66
  67 int
  68 main(int argc, char *argv[])
  69 {
  70         char **p, **start;
  71         int Hflag, Lflag, ch;
  72
  73         (void)setlocale(LC_ALL, "");
  74
  75         (void)time(&now);       /* initialize the time-of-day */
  76
  77         p = start = argv;
  78         Hflag = Lflag = 0;
  79         ftsoptions = FTS_NOSTAT | FTS_PHYSICAL;
  80         while ((ch = getopt(argc, argv, "EHLPXdf:sx")) != -1)
  81                 switch (ch) {
  82                 case 'E':
  83                         regexp_flags |= REG_EXTENDED;
  84                         break;
  85                 case 'H':
  86                         Hflag = 1;
  87                         Lflag = 0;
  88                         break;
  89                 case 'L':
  90                         Lflag = 1;
  91                         Hflag = 0;
  92                         break;
  93                 case 'P':
  94                         Hflag = Lflag = 0;
  95                         break;
  96                 case 'X':
  97                         isxargs = 1;
  98                         break;
  99                 case 'd':
 100                         isdepth = 1;
 101                         break;
 102                 case 'f':
 103                         *p++ = optarg;
 104                         break;
 105                 case 's':
 106                         issort = 1;
 107                         break;
 108                 case 'x':
 109                         ftsoptions |= FTS_XDEV;
 110                         break;
 111                 case '?':
 112                 default:
 113                         usage();
 114                 }
 115
 116         argc -= optind;
 117         argv += optind;
 118
 119         if (Hflag)
 120                 ftsoptions |= FTS_COMFOLLOW;
 121         if (Lflag) {
 122                 ftsoptions &= ~FTS_PHYSICAL;
 123                 ftsoptions |= FTS_LOGICAL;
 124         }
 125
 126         /*
 127          * Find first option to delimit the file list.  The first argument
 128          * that starts with a -, or is a ! or a ( must be interpreted as a
 129          * part of the find expression, according to POSIX .2.
 130          */
 131         for (; *argv != NULL; *p++ = *argv++) {
 132                 if (argv[0][0] == '-')
 133                         break;
 134                 if ((argv[0][0] == '!' || argv[0][0] == '(') &&
 135                     argv[0][1] == '\0')
 136                         break;
 137         }
 138
 139         if (p == start)
 140                 usage();
 141         *p = NULL;
 142
 143         if ((dotfd = open(".", O_RDONLY | O_CLOEXEC, 0)) < 0)
 144                 ftsoptions |= FTS_NOCHDIR;
 145
 146         exit(find_execute(find_formplan(argv), start));
 147 }
 148
 149 static void
 150 usage(void)
 151 {
 152         (void)fprintf(stderr, "%s\n%s\n",
 153 "usage: find [-H | -L | -P] [-EXdsx] [-f path] path ... [expression]",
 154 "       find [-H | -L | -P] [-EXdsx] -f path [path ...] [expression]");
 155         exit(1);
 156 }