main.c revision 72945 
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. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38char copyright[] =
39"@(#) Copyright (c) 1990, 1993, 1994\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)main.c	8.4 (Berkeley) 5/4/95";
46#else
47static const char rcsid[] =
48  "$FreeBSD: head/usr.bin/find/main.c 72945 2001-02-23 16:20:55Z knu $";
49#endif
50#endif /* not lint */
51
52#include <sys/types.h>
53#include <sys/stat.h>
54
55#include <err.h>
56#include <errno.h>
57#include <fcntl.h>
58#include <fts.h>
59#include <locale.h>
60#include <regex.h>
61#include <stdio.h>
62#include <stdlib.h>
63#include <time.h>
64#include <unistd.h>
65
66#include "find.h"
67
68time_t now;			/* time find was run */
69int dotfd;			/* starting directory */
70int ftsoptions;			/* options for the ftsopen(3) call */
71int isdeprecated;		/* using deprecated syntax */
72int isdepth;			/* do directories on post-order visit */
73int isoutput;			/* user specified output operator */
74int issort;         		/* do hierarchies in lexicographical order */
75int isxargs;			/* don't permit xargs delimiting chars */
76int mindepth = -1, maxdepth = -1; /* minimum and maximum depth */
77int regexp_flags = REG_BASIC;	/* use the "basic" regexp by default*/
78
79static void usage __P((void));
80
81int
82main(argc, argv)
83	int argc;
84	char *argv[];
85{
86	register char **p, **start;
87	int Hflag, Lflag, ch;
88
89	(void)setlocale(LC_ALL, "");
90
91	(void)time(&now);	/* initialize the time-of-day */
92
93	p = start = argv;
94	Hflag = Lflag = 0;
95	ftsoptions = FTS_NOSTAT | FTS_PHYSICAL;
96	while ((ch = getopt(argc, argv, "EHLPXdf:sx")) != -1)
97		switch (ch) {
98		case 'E':
99			regexp_flags |= REG_EXTENDED;
100			break;
101		case 'H':
102			Hflag = 1;
103			Lflag = 0;
104			break;
105		case 'L':
106			Lflag = 1;
107			Hflag = 0;
108			break;
109		case 'P':
110			Hflag = Lflag = 0;
111			break;
112		case 'X':
113			isxargs = 1;
114			break;
115		case 'd':
116			isdepth = 1;
117			break;
118		case 'f':
119			*p++ = optarg;
120			break;
121		case 's':
122			issort = 1;
123			break;
124		case 'x':
125			ftsoptions |= FTS_XDEV;
126			break;
127		case '?':
128		default:
129			break;
130		}
131
132	argc -= optind;
133	argv += optind;
134
135	if (Hflag)
136		ftsoptions |= FTS_COMFOLLOW;
137	if (Lflag) {
138		ftsoptions &= ~FTS_PHYSICAL;
139		ftsoptions |= FTS_LOGICAL;
140	}
141
142	/*
143	 * Find first option to delimit the file list.  The first argument
144	 * that starts with a -, or is a ! or a ( must be interpreted as a
145	 * part of the find expression, according to POSIX .2.
146	 */
147	for (; *argv != NULL; *p++ = *argv++) {
148		if (argv[0][0] == '-')
149			break;
150		if ((argv[0][0] == '!' || argv[0][0] == '(') &&
151		    argv[0][1] == '\0')
152			break;
153	}
154
155	if (p == start)
156		usage();
157	*p = NULL;
158
159	if ((dotfd = open(".", O_RDONLY, 0)) < 0)
160		err(1, ".");
161
162	exit(find_execute(find_formplan(argv), start));
163}
164
165static void
166usage()
167{
168	(void)fprintf(stderr,
169"usage: find [-H | -L | -P] [-EXdsx] [-f file] [file ...] [expression]\n");
170	exit(1);
171}
172