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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 $
38 * $DragonFly: src/usr.bin/find/find.c,v 1.6 2005/02/14 20:31:59 cpressey Exp $
41 #include <sys/types.h>
54 static int find_compare(const FTSENT * const *s1, const FTSENT * const *s2);
58 * tell fts_open() how to order the traversal of the hierarchy.
59 * This variant gives lexicographical order, i.e., alphabetical
60 * order within each directory.
63 find_compare(const FTSENT * const *s1, const FTSENT * const *s2)
66 return (strcoll((*s1)->fts_name, (*s2)->fts_name));
71 * process the command line and create a "plan" corresponding to the
75 find_formplan(char *argv[])
77 PLAN *plan, *tail, *new;
80 * for each argument in the command line, determine what kind of node
81 * it is, create the appropriate node type and add the new plan node
82 * to the end of the existing plan. The resulting plan is a linked
83 * list of plan nodes. For example, the string:
85 * % find . -name foo -newer bar -print
87 * results in the plan:
89 * [-name foo]--> [-newer bar]--> [-print]
91 * in this diagram, `[-name foo]' represents the plan node generated
92 * by c_name() with an argument of foo and `-->' represents the
95 for (plan = tail = NULL; *argv;) {
96 if (!(new = find_create(&argv)))
107 * if the user didn't specify one of -print, -ok or -exec, then -print
108 * is assumed so we bracket the current expression with parens, if
109 * necessary, and add a -print node on the end.
116 p = lookup_option("-print");
117 new = (p->create)(p, &argv1);
120 p = lookup_option("(");
121 new = (p->create)(p, &argv1);
124 p = lookup_option(")");
125 new = (p->create)(p, &argv1);
128 p = lookup_option("-print");
129 new = (p->create)(p, &argv1);
136 * the command line has been completely processed into a search plan
137 * except for the (, ), !, and -o operators. Rearrange the plan so
138 * that the portions of the plan which are affected by the operators
139 * are moved into operator nodes themselves. For example:
141 * [!]--> [-name foo]--> [-print]
145 * [! [-name foo] ]--> [-print]
149 * [(]--> [-depth]--> [-name foo]--> [)]--> [-print]
153 * [expr [-depth]-->[-name foo] ]--> [-print]
155 * operators are handled in order of precedence.
158 plan = paren_squish(plan); /* ()'s */
159 plan = not_squish(plan); /* !'s */
160 plan = or_squish(plan); /* -o's */
164 FTS *tree; /* pointer to top of FTS hierarchy */
168 * take a search plan and an array of search paths and executes the plan
169 * over all FTSENT's returned for the given search paths.
172 find_execute(PLAN *plan, char *paths[])
178 tree = fts_open(paths, ftsoptions, issort ? find_compare : NULL);
182 for (rval = 0; (entry = fts_read(tree)) != NULL;) {
183 if (maxdepth != -1 && entry->fts_level >= maxdepth) {
184 if (fts_set(tree, entry, FTS_SKIP))
185 err(1, "%s", entry->fts_path);
188 switch (entry->fts_info) {
202 entry->fts_path, strerror(entry->fts_errno));
210 #define BADCH " \t\n\\'\""
211 if (isxargs && strpbrk(entry->fts_path, BADCH)) {
213 warnx("%s: illegal path", entry->fts_path);
218 if (mindepth != -1 && entry->fts_level < mindepth)
222 * Call all the functions in the execution plan until one is
223 * false or all have been executed. This is where we do all
224 * the work specified by the user on the command line.
226 for (p = plan; p && (p->execute)(p, entry); p = p->next);
228 /* Finish any pending -exec ... {} + functions. */
229 for (p = plan; p != NULL; p = p->next)
230 if (p->execute == f_exec && p->flags & F_EXECPLUS)
231 (p->execute)(p, NULL);