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#include <sys/types.h>
36#include <sys/stat.h>
37
38#include <err.h>
39#include <errno.h>
40#include <fcntl.h>
41#include <fts.h>
42#include <locale.h>
43#include <regex.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <time.h>
47#include <unistd.h>
48
49#include "find.h"
50
51time_t now;			/* time find was run */
52int dotfd;			/* starting directory */
53int ftsoptions;			/* options for the ftsopen(3) call */
54int ignore_readdir_race;	/* ignore readdir race */
55int isdepth;			/* do directories on post-order visit */
56int isoutput;			/* user specified output operator */
57int issort;         		/* do hierarchies in lexicographical order */
58int isxargs;			/* don't permit xargs delimiting chars */
59int mindepth = -1, maxdepth = -1; /* minimum and maximum depth */
60int regexp_flags = REG_BASIC;	/* use the "basic" regexp by default*/
61int exitstatus;
62volatile sig_atomic_t showinfo = 0;
63
64static void usage(void) __dead2;
65static void siginfo_handler(int sig __unused);
66
67int
68main(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	(void)signal(SIGINFO, siginfo_handler);
78
79	p = start = argv;
80	Hflag = Lflag = 0;
81	ftsoptions = FTS_NOSTAT | FTS_PHYSICAL;
82	while ((ch = getopt(argc, argv, "EHLPXdf:sx")) != -1)
83		switch (ch) {
84		case 'E':
85			regexp_flags |= REG_EXTENDED;
86			break;
87		case 'H':
88			Hflag = 1;
89			Lflag = 0;
90			break;
91		case 'L':
92			Lflag = 1;
93			Hflag = 0;
94			break;
95		case 'P':
96			Hflag = Lflag = 0;
97			break;
98		case 'X':
99			isxargs = 1;
100			break;
101		case 'd':
102			isdepth = 1;
103			break;
104		case 'f':
105			*p++ = optarg;
106			break;
107		case 's':
108			issort = 1;
109			break;
110		case 'x':
111			ftsoptions |= FTS_XDEV;
112			break;
113		case '?':
114		default:
115			usage();
116		}
117
118	argc -= optind;
119	argv += optind;
120
121	if (Hflag)
122		ftsoptions |= FTS_COMFOLLOW;
123	if (Lflag) {
124		ftsoptions &= ~FTS_PHYSICAL;
125		ftsoptions |= FTS_LOGICAL;
126	}
127
128	/*
129	 * Find first option to delimit the file list.  The first argument
130	 * that starts with a -, or is a ! or a ( must be interpreted as a
131	 * part of the find expression, according to POSIX .2.
132	 */
133	for (; *argv != NULL; *p++ = *argv++) {
134		if (argv[0][0] == '-')
135			break;
136		if ((argv[0][0] == '!' || argv[0][0] == '(') &&
137		    argv[0][1] == '\0')
138			break;
139	}
140
141	if (p == start)
142		usage();
143	*p = NULL;
144
145	if ((dotfd = open(".", O_RDONLY | O_CLOEXEC, 0)) < 0)
146		ftsoptions |= FTS_NOCHDIR;
147
148	exit(find_execute(find_formplan(argv), start));
149}
150
151static void
152usage(void)
153{
154	(void)fprintf(stderr, "%s\n%s\n",
155"usage: find [-H | -L | -P] [-EXdsx] [-f path] path ... [expression]",
156"       find [-H | -L | -P] [-EXdsx] -f path [path ...] [expression]");
157	exit(1);
158}
159
160static void
161siginfo_handler(int sig __unused)
162{
163	showinfo = 1;
164}
165