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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18 * This product includes software developed by the University of
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39 static char sccsid[] = "@(#)find.c 8.5 (Berkeley) 8/5/94";
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
47 #include <sys/types.h>
60 static int find_compare(const FTSENT * const *s1, const FTSENT * const *s2);
64 * tell fts_open() how to order the traversal of the hierarchy.
65 * This variant gives lexicographical order, i.e., alphabetical
66 * order within each directory.
69 find_compare(const FTSENT * const *s1, const FTSENT * const *s2)
72 return (strcoll((*s1)->fts_name, (*s2)->fts_name));
77 * process the command line and create a "plan" corresponding to the
81 find_formplan(char *argv[])
83 PLAN *plan, *tail, *new;
86 * for each argument in the command line, determine what kind of node
87 * it is, create the appropriate node type and add the new plan node
88 * to the end of the existing plan. The resulting plan is a linked
89 * list of plan nodes. For example, the string:
91 * % find . -name foo -newer bar -print
93 * results in the plan:
95 * [-name foo]--> [-newer bar]--> [-print]
97 * in this diagram, `[-name foo]' represents the plan node generated
98 * by c_name() with an argument of foo and `-->' represents the
101 for (plan = tail = NULL; *argv;) {
102 if (!(new = find_create(&argv)))
113 * if the user didn't specify one of -print, -ok or -exec, then -print
114 * is assumed so we bracket the current expression with parens, if
115 * necessary, and add a -print node on the end.
122 p = lookup_option("-print");
123 new = (p->create)(p, &argv1);
126 p = lookup_option("(");
127 new = (p->create)(p, &argv1);
130 p = lookup_option(")");
131 new = (p->create)(p, &argv1);
134 p = lookup_option("-print");
135 new = (p->create)(p, &argv1);
142 * the command line has been completely processed into a search plan
143 * except for the (, ), !, and -o operators. Rearrange the plan so
144 * that the portions of the plan which are affected by the operators
145 * are moved into operator nodes themselves. For example:
147 * [!]--> [-name foo]--> [-print]
151 * [! [-name foo] ]--> [-print]
155 * [(]--> [-depth]--> [-name foo]--> [)]--> [-print]
159 * [expr [-depth]-->[-name foo] ]--> [-print]
161 * operators are handled in order of precedence.
164 plan = paren_squish(plan); /* ()'s */
165 plan = not_squish(plan); /* !'s */
166 plan = or_squish(plan); /* -o's */
170 FTS *tree; /* pointer to top of FTS hierarchy */
174 * take a search plan and an array of search paths and executes the plan
175 * over all FTSENT's returned for the given search paths.
178 find_execute(PLAN *plan, char *paths[])
184 tree = fts_open(paths, ftsoptions, (issort ? find_compare : NULL));
188 for (rval = 0; (entry = fts_read(tree)) != NULL;) {
189 if (maxdepth != -1 && entry->fts_level >= maxdepth) {
190 if (fts_set(tree, entry, FTS_SKIP))
191 err(1, "%s", entry->fts_path);
194 switch (entry->fts_info) {
206 (void)fflush(stdout);
208 entry->fts_path, strerror(entry->fts_errno));
216 #define BADCH " \t\n\\'\""
217 if (isxargs && strpbrk(entry->fts_path, BADCH)) {
218 (void)fflush(stdout);
219 warnx("%s: illegal path", entry->fts_path);
224 if (mindepth != -1 && entry->fts_level < mindepth)
228 * Call all the functions in the execution plan until one is
229 * false or all have been executed. This is where we do all
230 * the work specified by the user on the command line.
232 for (p = plan; p && (p->execute)(p, entry); p = p->next);