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.
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9 * modification, are permitted provided that the following conditions
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17 * may be used to endorse or promote products derived from this software
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20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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35 static char sccsid[] = "@(#)find.c 8.5 (Berkeley) 8/5/94";
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
43 #include <sys/types.h>
56 static int find_compare(const FTSENT * const *s1, const FTSENT * const *s2);
60 * tell fts_open() how to order the traversal of the hierarchy.
61 * This variant gives lexicographical order, i.e., alphabetical
62 * order within each directory.
65 find_compare(const FTSENT * const *s1, const FTSENT * const *s2)
68 return (strcoll((*s1)->fts_name, (*s2)->fts_name));
73 * process the command line and create a "plan" corresponding to the
77 find_formplan(char *argv[])
79 PLAN *plan, *tail, *new;
82 * for each argument in the command line, determine what kind of node
83 * it is, create the appropriate node type and add the new plan node
84 * to the end of the existing plan. The resulting plan is a linked
85 * list of plan nodes. For example, the string:
87 * % find . -name foo -newer bar -print
89 * results in the plan:
91 * [-name foo]--> [-newer bar]--> [-print]
93 * in this diagram, `[-name foo]' represents the plan node generated
94 * by c_name() with an argument of foo and `-->' represents the
97 for (plan = tail = NULL; *argv;) {
98 if (!(new = find_create(&argv)))
109 * if the user didn't specify one of -print, -ok or -exec, then -print
110 * is assumed so we bracket the current expression with parens, if
111 * necessary, and add a -print node on the end.
118 p = lookup_option("-print");
119 new = (p->create)(p, &argv1);
122 p = lookup_option("(");
123 new = (p->create)(p, &argv1);
126 p = lookup_option(")");
127 new = (p->create)(p, &argv1);
130 p = lookup_option("-print");
131 new = (p->create)(p, &argv1);
138 * the command line has been completely processed into a search plan
139 * except for the (, ), !, and -o operators. Rearrange the plan so
140 * that the portions of the plan which are affected by the operators
141 * are moved into operator nodes themselves. For example:
143 * [!]--> [-name foo]--> [-print]
147 * [! [-name foo] ]--> [-print]
151 * [(]--> [-depth]--> [-name foo]--> [)]--> [-print]
155 * [expr [-depth]-->[-name foo] ]--> [-print]
157 * operators are handled in order of precedence.
160 plan = paren_squish(plan); /* ()'s */
161 plan = not_squish(plan); /* !'s */
162 plan = or_squish(plan); /* -o's */
166 FTS *tree; /* pointer to top of FTS hierarchy */
170 * take a search plan and an array of search paths and executes the plan
171 * over all FTSENT's returned for the given search paths.
174 find_execute(PLAN *plan, char *paths[])
180 tree = fts_open(paths, ftsoptions, (issort ? find_compare : NULL));
185 while (errno = 0, (entry = fts_read(tree)) != NULL) {
186 if (maxdepth != -1 && entry->fts_level >= maxdepth) {
187 if (fts_set(tree, entry, FTS_SKIP))
188 err(1, "%s", entry->fts_path);
191 switch (entry->fts_info) {
202 if (ignore_readdir_race &&
203 entry->fts_errno == ENOENT && entry->fts_level > 0)
207 (void)fflush(stdout);
209 entry->fts_path, strerror(entry->fts_errno));
217 #define BADCH " \t\n\\'\""
218 if (isxargs && strpbrk(entry->fts_path, BADCH)) {
219 (void)fflush(stdout);
220 warnx("%s: illegal path", entry->fts_path);
225 if (mindepth != -1 && entry->fts_level < mindepth)
229 * Call all the functions in the execution plan until one is
230 * false or all have been executed. This is where we do all
231 * the work specified by the user on the command line.
233 for (p = plan; p && (p->execute)(p, entry); p = p->next);
237 if (e && (!ignore_readdir_race || e != ENOENT))
238 errc(1, e, "fts_read");