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  * 4. 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
  33 #ifndef lint
  34 static const char copyright[] =
  35 "@(#) Copyright (c) 1990, 1993, 1994\n\
  36         The Regents of the University of California.  All rights reserved.\n";
  37 #endif /* not lint */
  38
  39 #ifndef lint
  40 #if 0
  41 static char sccsid[] = "@(#)main.c      8.4 (Berkeley) 5/4/95";
  42 #endif
  43 #endif /* not lint */
  44
  45 #include <sys/cdefs.h>
  46 __FBSDID("$FreeBSD: src/usr.bin/find/main.c,v 1.23 2011/12/10 18:11:06 ed Exp $");
  47
  48 #include <sys/types.h>
  49 #include <sys/stat.h>
  50
  51 #include <err.h>
  52 #include <errno.h>
  53 #include <fcntl.h>
  54 #include <fts.h>
  55 #include <locale.h>
  56 #include <regex.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <time.h>
  60 #include <unistd.h>
  61
  62 #include "find.h"
  63
  64 time_t now;                     /* time find was run */
  65 int dotfd;                      /* starting directory */
  66 int ftsoptions;                 /* options for the ftsopen(3) call */
  67 int isdeprecated;               /* using deprecated syntax */
  68 int isdepth;                    /* do directories on post-order visit */
  69 int isoutput;                   /* user specified output operator */
  70 int issort;                     /* do hierarchies in lexicographical order */
  71 int isxargs;                    /* don't permit xargs delimiting chars */
  72 int mindepth = -1, maxdepth = -1; /* minimum and maximum depth */
  73 int regexp_flags = REG_BASIC;   /* use the "basic" regexp by default*/
  74
  75 static void usage(void);
  76
  77 int
  78 main(int argc, char *argv[])
  79 {
  80         char **p, **start;
  81         int Hflag, Lflag, ch;
  82
  83         (void)setlocale(LC_ALL, "");
  84
  85         (void)time(&now);       /* initialize the time-of-day */
  86
  87         p = start = argv;
  88         Hflag = Lflag = 0;
  89         ftsoptions = FTS_NOSTAT | FTS_PHYSICAL;
  90         while ((ch = getopt(argc, argv, "EHLPXdf:sx")) != -1)
  91                 switch (ch) {
  92                 case 'E':
  93                         regexp_flags |= REG_EXTENDED;
  94                         break;
  95                 case 'H':
  96                         Hflag = 1;
  97                         Lflag = 0;
  98                         break;
  99                 case 'L':
 100                         Lflag = 1;
 101                         Hflag = 0;
 102                         break;
 103                 case 'P':
 104                         Hflag = Lflag = 0;
 105                         break;
 106                 case 'X':
 107                         isxargs = 1;
 108                         break;
 109                 case 'd':
 110                         isdepth = 1;
 111                         break;
 112                 case 'f':
 113                         *p++ = optarg;
 114                         break;
 115                 case 's':
 116                         issort = 1;
 117                         break;
 118                 case 'x':
 119                         ftsoptions |= FTS_XDEV;
 120                         break;
 121                 case '?':
 122                 default:
 123                         usage();
 124                 }
 125
 126         argc -= optind;
 127         argv += optind;
 128
 129         if (Hflag)
 130                 ftsoptions |= FTS_COMFOLLOW;
 131         if (Lflag) {
 132                 ftsoptions &= ~FTS_PHYSICAL;
 133                 ftsoptions |= FTS_LOGICAL;
 134         }
 135
 136         /*
 137          * Find first option to delimit the file list.  The first argument
 138          * that starts with a -, or is a ! or a ( must be interpreted as a
 139          * part of the find expression, according to POSIX .2.
 140          */
 141         for (; *argv != NULL; *p++ = *argv++) {
 142                 if (argv[0][0] == '-')
 143                         break;
 144                 if ((argv[0][0] == '!' || argv[0][0] == '(') &&
 145                     argv[0][1] == '\0')
 146                         break;
 147         }
 148
 149         if (p == start)
 150                 usage();
 151         *p = NULL;
 152
 153         if ((dotfd = open(".", O_RDONLY, 0)) < 0)
 154                 err(1, ".");
 155
 156         exit(find_execute(find_formplan(argv), start));
 157 }
 158
 159 static void
 160 usage(void)
 161 {
 162         (void)fprintf(stderr, "%s\n%s\n",
 163 "usage: find [-H | -L | -P] [-EXdsx] [-f path] path ... [expression]",
 164 "       find [-H | -L | -P] [-EXdsx] -f path [path ...] [expression]");
 165         exit(1);
 166 }