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      1 /*	$NetBSD: main.c,v 1.32 2023/04/01 15:57:20 christos 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 1.32 2023/04/01 15:57:20 christos 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 <locale.h>
     54 #include <stdio.h>
     55 #include <stdlib.h>
     56 #include <string.h>
     57 #include <time.h>
     58 #include <unistd.h>
     59 
     60 #include "find.h"
     61 
     62 time_t now;			/* time find was run */
     63 int dotfd;			/* starting directory */
     64 int ftsoptions;			/* options for the ftsopen(3) call */
     65 int isdeprecated;		/* using deprecated syntax */
     66 int isdepth;			/* do directories on post-order visit */
     67 int isoutput;			/* user specified output operator */
     68 int issort;			/* sort directory entries */
     69 int isxargs;			/* don't permit xargs delimiting chars */
     70 int regcomp_flags = REG_BASIC;	/* regex compilation flags */
     71 
     72 __dead static void usage(void);
     73 
     74 int
     75 main(int argc, char *argv[])
     76 {
     77 	char **p, **start;
     78 	int ch;
     79 
     80 	(void)time(&now);	/* initialize the time-of-day */
     81 	(void)setlocale(LC_ALL, "");
     82 
     83 	/* array to hold dir list.  at most (argc - 1) elements. */
     84 	p = start = malloc(argc * sizeof (char *));
     85 	if (p == NULL)
     86 		err(1, NULL);
     87 
     88 	ftsoptions = FTS_NOSTAT | FTS_PHYSICAL;
     89 	while ((ch = getopt(argc, argv, "HLPdEf:hsXx")) != -1)
     90 		switch (ch) {
     91 		case 'H':
     92 			ftsoptions &= ~FTS_LOGICAL;
     93 			ftsoptions |= FTS_PHYSICAL|FTS_COMFOLLOW;
     94 			break;
     95 		case 'L':
     96 			ftsoptions &= ~(FTS_COMFOLLOW|FTS_PHYSICAL);
     97 			ftsoptions |= FTS_LOGICAL;
     98 			break;
     99 		case 'P':
    100 			ftsoptions &= ~(FTS_COMFOLLOW|FTS_LOGICAL);
    101 			ftsoptions |= FTS_PHYSICAL;
    102 			break;
    103 		case 'd':
    104 			isdepth = 1;
    105 			break;
    106 		case 'E':
    107 			regcomp_flags = REG_EXTENDED;
    108 			break;
    109 		case 'f':
    110 			*p++ = optarg;
    111 			break;
    112 		case 'h':
    113 			ftsoptions &= ~FTS_PHYSICAL;
    114 			ftsoptions |= FTS_LOGICAL;
    115 			break;
    116 		case 's':
    117 			issort = 1;
    118 			break;
    119 		case 'X':
    120 			isxargs = 1;
    121 			break;
    122 		case 'x':
    123 			ftsoptions |= FTS_XDEV;
    124 			break;
    125 		case '?':
    126 		default:
    127 			break;
    128 		}
    129 
    130 	argc -= optind;
    131 	argv += optind;
    132 
    133 	/*
    134 	 * Find first option to delimit the file list.  The first argument
    135 	 * that starts with a -, or is a ! or a ( must be interpreted as a
    136 	 * part of the find expression, according to POSIX .2.
    137 	 */
    138 	for (; *argv != NULL; *p++ = *argv++) {
    139 		if (argv[0][0] == '-')
    140 			break;
    141 		if ((argv[0][0] == '!' || argv[0][0] == '(') &&
    142 		    argv[0][1] == '\0')
    143 			break;
    144 	}
    145 
    146 	if (p == start)
    147 		usage();
    148 
    149 	*p = NULL;
    150 
    151 	if ((dotfd = open(".", O_RDONLY | O_CLOEXEC, 0)) == -1)
    152 		ftsoptions |= FTS_NOCHDIR;
    153 
    154 	return find_execute(find_formplan(argv), start);
    155 }
    156 
    157 static void
    158 usage(void)
    159 {
    160 
    161 	(void)fprintf(stderr, "Usage: %s [-H | -L | -P] [-dEhsXx] [-f file] "
    162 	    "file [file ...] [expression]\n", getprogname());
    163 	exit(1);
    164 }
    165