2 * Copyright (c) 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Cimarron D. Taylor of the University of California, Berkeley.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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. 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.
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
32 * @(#)find.c 8.5 (Berkeley) 8/5/94
33 * $FreeBSD: head/usr.bin/find/find.c 238780 2012-07-25 21:59:10Z jilles $
36 #include <sys/types.h>
49 static int find_compare(const FTSENT
* const *s1
, const FTSENT
* const *s2
);
53 * tell fts_open() how to order the traversal of the hierarchy.
54 * This variant gives lexicographical order, i.e., alphabetical
55 * order within each directory.
58 find_compare(const FTSENT
* const *s1
, const FTSENT
* const *s2
)
61 return (strcoll((*s1
)->fts_name
, (*s2
)->fts_name
));
66 * process the command line and create a "plan" corresponding to the
70 find_formplan(char *argv
[])
72 PLAN
*plan
, *tail
, *new;
75 * for each argument in the command line, determine what kind of node
76 * it is, create the appropriate node type and add the new plan node
77 * to the end of the existing plan. The resulting plan is a linked
78 * list of plan nodes. For example, the string:
80 * % find . -name foo -newer bar -print
82 * results in the plan:
84 * [-name foo]--> [-newer bar]--> [-print]
86 * in this diagram, `[-name foo]' represents the plan node generated
87 * by c_name() with an argument of foo and `-->' represents the
90 for (plan
= tail
= NULL
; *argv
;) {
91 if (!(new = find_create(&argv
)))
102 * if the user didn't specify one of -print, -ok or -exec, then -print
103 * is assumed so we bracket the current expression with parens, if
104 * necessary, and add a -print node on the end.
111 p
= lookup_option("-print");
112 new = (p
->create
)(p
, &argv1
);
115 p
= lookup_option("(");
116 new = (p
->create
)(p
, &argv1
);
119 p
= lookup_option(")");
120 new = (p
->create
)(p
, &argv1
);
123 p
= lookup_option("-print");
124 new = (p
->create
)(p
, &argv1
);
131 * the command line has been completely processed into a search plan
132 * except for the (, ), !, and -o operators. Rearrange the plan so
133 * that the portions of the plan which are affected by the operators
134 * are moved into operator nodes themselves. For example:
136 * [!]--> [-name foo]--> [-print]
140 * [! [-name foo] ]--> [-print]
144 * [(]--> [-depth]--> [-name foo]--> [)]--> [-print]
148 * [expr [-depth]-->[-name foo] ]--> [-print]
150 * operators are handled in order of precedence.
153 plan
= paren_squish(plan
); /* ()'s */
154 plan
= not_squish(plan
); /* !'s */
155 plan
= or_squish(plan
); /* -o's */
159 FTS
*tree
; /* pointer to top of FTS hierarchy */
163 * take a search plan and an array of search paths and executes the plan
164 * over all FTSENT's returned for the given search paths.
167 find_execute(PLAN
*plan
, char *paths
[])
173 tree
= fts_open(paths
, ftsoptions
, (issort
? find_compare
: NULL
));
177 for (rval
= 0; (entry
= fts_read(tree
)) != NULL
;) {
178 if (maxdepth
!= -1 && entry
->fts_level
>= maxdepth
) {
179 if (fts_set(tree
, entry
, FTS_SKIP
))
180 err(1, "%s", entry
->fts_path
);
183 switch (entry
->fts_info
) {
194 if (ignore_readdir_race
&&
195 entry
->fts_errno
== ENOENT
&& entry
->fts_level
> 0)
199 (void)fflush(stdout
);
201 entry
->fts_path
, strerror(entry
->fts_errno
));
209 #define BADCH " \t\n\\'\""
210 if (isxargs
&& strpbrk(entry
->fts_path
, BADCH
)) {
211 (void)fflush(stdout
);
212 warnx("%s: illegal path", entry
->fts_path
);
217 if (mindepth
!= -1 && entry
->fts_level
< mindepth
)
221 * Call all the functions in the execution plan until one is
222 * false or all have been executed. This is where we do all
223 * the work specified by the user on the command line.
225 for (p
= plan
; p
&& (p
->execute
)(p
, entry
); p
= p
->next
);
228 if (errno
&& (!ignore_readdir_race
|| errno
!= ENOENT
))