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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39 static char sccsid[] = "@(#)find.c 8.5 (Berkeley) 8/5/94";
41 static const char rcsid[] =
46 #include <sys/types.h>
59 static int find_compare __P((const FTSENT **s1, const FTSENT **s2));
63 * tell fts_open() how to order the traversal of the hierarchy.
64 * This variant gives lexicographical order, i.e., alphabetical
65 * order within each directory.
69 const FTSENT **s1, **s2;
72 return (strcoll((*s1)->fts_name, (*s2)->fts_name));
77 * process the command line and create a "plan" corresponding to the
84 PLAN *plan, *tail, *new;
87 * for each argument in the command line, determine what kind of node
88 * it is, create the appropriate node type and add the new plan node
89 * to the end of the existing plan. The resulting plan is a linked
90 * list of plan nodes. For example, the string:
92 * % find . -name foo -newer bar -print
94 * results in the plan:
96 * [-name foo]--> [-newer bar]--> [-print]
98 * in this diagram, `[-name foo]' represents the plan node generated
99 * by c_name() with an argument of foo and `-->' represents the
100 * plan->next pointer.
102 for (plan = tail = NULL; *argv;) {
103 if (!(new = find_create(&argv)))
114 * if the user didn't specify one of -print, -ok or -exec, then -print
115 * is assumed so we bracket the current expression with parens, if
116 * necessary, and add a -print node on the end.
123 p = option("-print");
124 new = (p->create)(p, &argv);
128 new = (p->create)(p, &argv);
132 new = (p->create)(p, &argv);
135 p = option("-print");
136 new = (p->create)(p, &argv);
143 * the command line has been completely processed into a search plan
144 * except for the (, ), !, and -o operators. Rearrange the plan so
145 * that the portions of the plan which are affected by the operators
146 * are moved into operator nodes themselves. For example:
148 * [!]--> [-name foo]--> [-print]
152 * [! [-name foo] ]--> [-print]
156 * [(]--> [-depth]--> [-name foo]--> [)]--> [-print]
160 * [expr [-depth]-->[-name foo] ]--> [-print]
162 * operators are handled in order of precedence.
165 plan = paren_squish(plan); /* ()'s */
166 plan = not_squish(plan); /* !'s */
167 plan = or_squish(plan); /* -o's */
171 FTS *tree; /* pointer to top of FTS hierarchy */
175 * take a search plan and an array of search paths and executes the plan
176 * over all FTSENT's returned for the given search paths.
179 find_execute(plan, paths)
180 PLAN *plan; /* search plan */
181 char **paths; /* array of pathnames to traverse */
183 register FTSENT *entry;
187 tree = fts_open(paths, ftsoptions, (issort ? find_compare : NULL));
191 for (rval = 0; (entry = fts_read(tree)) != NULL;) {
192 switch (entry->fts_info) {
204 (void)fflush(stdout);
206 entry->fts_path, strerror(entry->fts_errno));
214 #define BADCH " \t\n\\'\""
215 if (isxargs && strpbrk(entry->fts_path, BADCH)) {
216 (void)fflush(stdout);
217 warnx("%s: illegal path", entry->fts_path);
222 if (mindepth != -1 && entry->fts_level < mindepth)
226 * Call all the functions in the execution plan until one is
227 * false or all have been executed. This is where we do all
228 * the work specified by the user on the command line.
230 for (p = plan; p && (p->execute)(p, entry); p = p->next);
232 if (maxdepth != -1 && entry->fts_level >= maxdepth) {
233 if (fts_set(tree, entry, FTS_SKIP))
234 err(1, "%s", entry->fts_path);