xref: /freebsd/usr.bin/find/main.c (revision 8a4217aacf57330755501a349d0ea662d4880386)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
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 #ifndef lint
36 static const char copyright[] =
37 "@(#) Copyright (c) 1990, 1993, 1994\n\
38 	The Regents of the University of California.  All rights reserved.\n";
39 #endif /* not lint */
40 
41 #ifndef lint
42 #if 0
43 static char sccsid[] = "@(#)main.c	8.4 (Berkeley) 5/4/95";
44 #endif
45 #endif /* not lint */
46 
47 #include <sys/cdefs.h>
48 __FBSDID("$FreeBSD$");
49 
50 #include <sys/types.h>
51 #include <sys/stat.h>
52 
53 #include <err.h>
54 #include <errno.h>
55 #include <fcntl.h>
56 #include <fts.h>
57 #include <locale.h>
58 #include <regex.h>
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include <time.h>
62 #include <unistd.h>
63 
64 #include "find.h"
65 
66 time_t now;			/* time find was run */
67 int dotfd;			/* starting directory */
68 int ftsoptions;			/* options for the ftsopen(3) call */
69 int ignore_readdir_race;	/* ignore readdir race */
70 int isdeprecated;		/* using deprecated syntax */
71 int isdepth;			/* do directories on post-order visit */
72 int isoutput;			/* user specified output operator */
73 int issort;         		/* do hierarchies in lexicographical order */
74 int isxargs;			/* don't permit xargs delimiting chars */
75 int mindepth = -1, maxdepth = -1; /* minimum and maximum depth */
76 int regexp_flags = REG_BASIC;	/* use the "basic" regexp by default*/
77 int exitstatus;
78 
79 static void usage(void);
80 
81 int
82 main(int argc, char *argv[])
83 {
84 	char **p, **start;
85 	int Hflag, Lflag, ch;
86 
87 	(void)setlocale(LC_ALL, "");
88 
89 	(void)time(&now);	/* initialize the time-of-day */
90 
91 	p = start = argv;
92 	Hflag = Lflag = 0;
93 	ftsoptions = FTS_NOSTAT | FTS_PHYSICAL;
94 	while ((ch = getopt(argc, argv, "EHLPXdf:sx")) != -1)
95 		switch (ch) {
96 		case 'E':
97 			regexp_flags |= REG_EXTENDED;
98 			break;
99 		case 'H':
100 			Hflag = 1;
101 			Lflag = 0;
102 			break;
103 		case 'L':
104 			Lflag = 1;
105 			Hflag = 0;
106 			break;
107 		case 'P':
108 			Hflag = Lflag = 0;
109 			break;
110 		case 'X':
111 			isxargs = 1;
112 			break;
113 		case 'd':
114 			isdepth = 1;
115 			break;
116 		case 'f':
117 			*p++ = optarg;
118 			break;
119 		case 's':
120 			issort = 1;
121 			break;
122 		case 'x':
123 			ftsoptions |= FTS_XDEV;
124 			break;
125 		case '?':
126 		default:
127 			usage();
128 		}
129 
130 	argc -= optind;
131 	argv += optind;
132 
133 	if (Hflag)
134 		ftsoptions |= FTS_COMFOLLOW;
135 	if (Lflag) {
136 		ftsoptions &= ~FTS_PHYSICAL;
137 		ftsoptions |= FTS_LOGICAL;
138 	}
139 
140 	/*
141 	 * Find first option to delimit the file list.  The first argument
142 	 * that starts with a -, or is a ! or a ( must be interpreted as a
143 	 * part of the find expression, according to POSIX .2.
144 	 */
145 	for (; *argv != NULL; *p++ = *argv++) {
146 		if (argv[0][0] == '-')
147 			break;
148 		if ((argv[0][0] == '!' || argv[0][0] == '(') &&
149 		    argv[0][1] == '\0')
150 			break;
151 	}
152 
153 	if (p == start)
154 		usage();
155 	*p = NULL;
156 
157 	if ((dotfd = open(".", O_RDONLY | O_CLOEXEC, 0)) < 0)
158 		ftsoptions |= FTS_NOCHDIR;
159 
160 	exit(find_execute(find_formplan(argv), start));
161 }
162 
163 static void
164 usage(void)
165 {
166 	(void)fprintf(stderr, "%s\n%s\n",
167 "usage: find [-H | -L | -P] [-EXdsx] [-f path] path ... [expression]",
168 "       find [-H | -L | -P] [-EXdsx] -f path [path ...] [expression]");
169 	exit(1);
170 }
171