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- /*-
- * Copyright (c) 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Cimarron D. Taylor of the University of California, Berkeley.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)find.c 5.3 (Berkeley) 5/25/91";
- #endif /* not lint */
-
- #ifdef DF_POSIX /* DF_MSS */
- #include <misc.h>
- #include <bsdlib.h>
- #endif
-
- #include <sys/types.h>
- #include <sys/stat.h>
-
- #ifdef _POSIX_SOURCE /* DF_MSS */
- #include <errno.h>
- #else
- #include <sys/errno.h>
- #endif
-
- #include <fts.h>
- #include <stdio.h>
- #include <string.h>
- #include <stdlib.h>
- #include "find.h"
-
- /*
- * find_formplan --
- * process the command line and create a "plan" corresponding to the
- * command arguments.
- */
- PLAN *
- #if __STDC__
- find_formplan (char **argv)
- #else
- find_formplan(argv)
- char **argv;
- #endif
- {
- PLAN *plan, *tail, *new;
- PLAN *c_print __P((void)), *find_create __P((char ***));
- PLAN *not_squish __P((PLAN *)), *or_squish __P((PLAN *));
- PLAN *paren_squish __P((PLAN *));
-
- /*
- * for each argument in the command line, determine what kind of node
- * it is, create the appropriate node type and add the new plan node
- * to the end of the existing plan. The resulting plan is a linked
- * list of plan nodes. For example, the string:
- *
- * % find . -name foo -newer bar -print
- *
- * results in the plan:
- *
- * [-name foo]--> [-newer bar]--> [-print]
- *
- * in this diagram, `[-name foo]' represents the plan node generated
- * by c_name() with an argument of foo and `-->' represents the
- * plan->next pointer.
- */
- for (plan = NULL; *argv;) {
- if (!(new = find_create(&argv)))
- continue;
- if (plan == NULL)
- tail = plan = new;
- else {
- tail->next = new;
- tail = new;
- }
- }
-
- /*
- * if the user didn't specify one of -print, -ok or -exec, then -print
- * is assumed so we add a -print node on the end. It is possible that
- * the user might want the -print someplace else on the command line,
- * but there's no way to know that.
- */
- if (!isoutput) {
- new = c_print();
- if (plan == NULL)
- tail = plan = new;
- else {
- tail->next = new;
- tail = new;
- }
- }
-
- /*
- * the command line has been completely processed into a search plan
- * except for the (, ), !, and -o operators. Rearrange the plan so
- * that the portions of the plan which are affected by the operators
- * are moved into operator nodes themselves. For example:
- *
- * [!]--> [-name foo]--> [-print]
- *
- * becomes
- *
- * [! [-name foo] ]--> [-print]
- *
- * and
- *
- * [(]--> [-depth]--> [-name foo]--> [)]--> [-print]
- *
- * becomes
- *
- * [expr [-depth]-->[-name foo] ]--> [-print]
- *
- * operators are handled in order of precedence.
- */
-
- plan = paren_squish(plan); /* ()'s */
- plan = not_squish(plan); /* !'s */
- plan = or_squish(plan); /* -o's */
- return(plan);
- }
-
- FTS *tree; /* pointer to top of FTS hierarchy */
-
- /*
- * find_execute --
- * take a search plan and an array of search paths and executes the plan
- * over all FTSENT's returned for the given search paths.
- */
- void
- #if __STDC__
- find_execute (PLAN *plan, char **paths)
- #else
- find_execute(plan, paths)
- PLAN *plan; /* search plan */
- char **paths; /* array of pathnames to traverse */
- #endif
- {
- register FTSENT *entry;
- PLAN *p;
-
- if (!(tree = fts_open(paths, ftsoptions, (int (*) __P((const FTSENT *, const FTSENT *)))NULL)))
- err("ftsopen: %s", strerror(errno));
-
- while ((entry = fts_read(tree)) != NULL) {
- switch(entry->fts_info) {
- case FTS_D:
- if (isdepth)
- continue;
- break;
- case FTS_DP:
- if (!isdepth)
- continue;
- break;
- case FTS_DNR:
- case FTS_ERR:
- case FTS_NS:
- (void)fprintf(stderr, "find: %s: %s\n",
- entry->fts_path, strerror(errno));
- continue;
- case FTS_SL:
- if (entry->fts_level == FTS_ROOTLEVEL) {
- (void)fts_set(tree, entry, FTS_FOLLOW);
- continue;
- }
- break;
- }
-
- #define BADCH " \t\n\\'\""
- if (isxargs && strpbrk(entry->fts_path, BADCH)) {
- (void)fprintf(stderr,
- "find: illegal path: %s\n", entry->fts_path);
- continue;
- }
-
- /*
- * call all the functions in the execution plan until one is
- * false or all have been executed. This is where we do all
- * the work specified by the user on the command line.
- */
- for (p = plan; p && (p->eval)(p, entry); p = p->next);
- }
- (void)fts_close(tree);
- }
-