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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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36 * @(#)find.c 8.5 (Berkeley) 8/5/94
37 * $FreeBSD: src/usr.bin/find/find.c,v 1.17 2004/05/28 17:17:15 eik Exp $
40 #include <sys/types.h>
53 static int find_compare(const FTSENT * const *s1, const FTSENT * const *s2);
57 * tell fts_open() how to order the traversal of the hierarchy.
58 * This variant gives lexicographical order, i.e., alphabetical
59 * order within each directory.
62 find_compare(const FTSENT * const *s1, const FTSENT * const *s2)
65 return (strcoll((*s1)->fts_name, (*s2)->fts_name));
70 * process the command line and create a "plan" corresponding to the
74 find_formplan(char *argv[])
76 PLAN *plan, *tail, *new;
79 * for each argument in the command line, determine what kind of node
80 * it is, create the appropriate node type and add the new plan node
81 * to the end of the existing plan. The resulting plan is a linked
82 * list of plan nodes. For example, the string:
84 * % find . -name foo -newer bar -print
86 * results in the plan:
88 * [-name foo]--> [-newer bar]--> [-print]
90 * in this diagram, `[-name foo]' represents the plan node generated
91 * by c_name() with an argument of foo and `-->' represents the
94 for (plan = tail = NULL; *argv;) {
95 if (!(new = find_create(&argv)))
106 * if the user didn't specify one of -print, -ok or -exec, then -print
107 * is assumed so we bracket the current expression with parens, if
108 * necessary, and add a -print node on the end.
115 p = lookup_option("-print");
116 new = (p->create)(p, &argv1);
119 p = lookup_option("(");
120 new = (p->create)(p, &argv1);
123 p = lookup_option(")");
124 new = (p->create)(p, &argv1);
127 p = lookup_option("-print");
128 new = (p->create)(p, &argv1);
135 * the command line has been completely processed into a search plan
136 * except for the (, ), !, and -o operators. Rearrange the plan so
137 * that the portions of the plan which are affected by the operators
138 * are moved into operator nodes themselves. For example:
140 * [!]--> [-name foo]--> [-print]
144 * [! [-name foo] ]--> [-print]
148 * [(]--> [-depth]--> [-name foo]--> [)]--> [-print]
152 * [expr [-depth]-->[-name foo] ]--> [-print]
154 * operators are handled in order of precedence.
157 plan = paren_squish(plan); /* ()'s */
158 plan = not_squish(plan); /* !'s */
159 plan = or_squish(plan); /* -o's */
163 FTS *tree; /* pointer to top of FTS hierarchy */
167 * take a search plan and an array of search paths and executes the plan
168 * over all FTSENT's returned for the given search paths.
171 find_execute(PLAN *plan, char *paths[])
177 tree = fts_open(paths, ftsoptions, issort ? find_compare : NULL);
181 for (rval = 0; (entry = fts_read(tree)) != NULL;) {
182 if (maxdepth != -1 && entry->fts_level >= maxdepth) {
183 if (fts_set(tree, entry, FTS_SKIP))
184 err(1, "%s", entry->fts_path);
187 switch (entry->fts_info) {
201 entry->fts_path, strerror(entry->fts_errno));
209 #define BADCH " \t\n\\'\""
210 if (isxargs && strpbrk(entry->fts_path, BADCH)) {
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);
227 /* Finish any pending -exec ... {} + functions. */
228 for (p = plan; p != NULL; p = p->next)
229 if (p->execute == f_exec && p->flags & F_EXECPLUS)
230 (p->execute)(p, NULL);