1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Cimarron D. Taylor of the University of California, Berkeley. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 /*static char sccsid[] = "from: @(#)find.c 8.1 (Berkeley) 6/6/93";*/ 39 static char rcsid[] = "$Id: find.c,v 1.6 1994/07/18 09:55:36 cgd Exp $"; 40 #endif /* not lint */ 41 42 #include <sys/types.h> 43 #include <sys/stat.h> 44 45 #include <err.h> 46 #include <errno.h> 47 #include <fts.h> 48 #include <stdio.h> 49 #include <string.h> 50 #include <stdlib.h> 51 52 #include "find.h" 53 54 /* 55 * find_formplan -- 56 * process the command line and create a "plan" corresponding to the 57 * command arguments. 58 */ 59 PLAN * 60 find_formplan(argv) 61 char **argv; 62 { 63 PLAN *plan, *tail, *new; 64 65 /* 66 * for each argument in the command line, determine what kind of node 67 * it is, create the appropriate node type and add the new plan node 68 * to the end of the existing plan. The resulting plan is a linked 69 * list of plan nodes. For example, the string: 70 * 71 * % find . -name foo -newer bar -print 72 * 73 * results in the plan: 74 * 75 * [-name foo]--> [-newer bar]--> [-print] 76 * 77 * in this diagram, `[-name foo]' represents the plan node generated 78 * by c_name() with an argument of foo and `-->' represents the 79 * plan->next pointer. 80 */ 81 for (plan = tail = NULL; *argv;) { 82 if (!(new = find_create(&argv))) 83 continue; 84 if (plan == NULL) 85 tail = plan = new; 86 else { 87 tail->next = new; 88 tail = new; 89 } 90 } 91 92 /* 93 * if the user didn't specify one of -print, -ok or -exec, then -print 94 * is assumed so we bracket the current expression with parens, if 95 * necessary, and add a -print node on the end. 96 */ 97 if (!isoutput) { 98 if (plan == NULL) { 99 new = c_print(); 100 tail = plan = new; 101 } else { 102 new = c_openparen(); 103 new->next = plan; 104 plan = new; 105 new = c_closeparen(); 106 tail->next = new; 107 tail = new; 108 new = c_print(); 109 tail->next = new; 110 tail = new; 111 } 112 } 113 114 /* 115 * the command line has been completely processed into a search plan 116 * except for the (, ), !, and -o operators. Rearrange the plan so 117 * that the portions of the plan which are affected by the operators 118 * are moved into operator nodes themselves. For example: 119 * 120 * [!]--> [-name foo]--> [-print] 121 * 122 * becomes 123 * 124 * [! [-name foo] ]--> [-print] 125 * 126 * and 127 * 128 * [(]--> [-depth]--> [-name foo]--> [)]--> [-print] 129 * 130 * becomes 131 * 132 * [expr [-depth]-->[-name foo] ]--> [-print] 133 * 134 * operators are handled in order of precedence. 135 */ 136 137 plan = paren_squish(plan); /* ()'s */ 138 plan = not_squish(plan); /* !'s */ 139 plan = or_squish(plan); /* -o's */ 140 return (plan); 141 } 142 143 FTS *tree; /* pointer to top of FTS hierarchy */ 144 145 /* 146 * find_execute -- 147 * take a search plan and an array of search paths and executes the plan 148 * over all FTSENT's returned for the given search paths. 149 */ 150 void 151 find_execute(plan, paths) 152 PLAN *plan; /* search plan */ 153 char **paths; /* array of pathnames to traverse */ 154 { 155 register FTSENT *entry; 156 PLAN *p; 157 158 if (!(tree = fts_open(paths, ftsoptions, (int (*)())NULL))) 159 err(1, "ftsopen"); 160 161 while (entry = fts_read(tree)) { 162 switch(entry->fts_info) { 163 case FTS_D: 164 if (isdepth) 165 continue; 166 break; 167 case FTS_DP: 168 if (!isdepth) 169 continue; 170 break; 171 case FTS_DNR: 172 case FTS_ERR: 173 case FTS_NS: 174 (void)fflush(stdout); 175 warn("%s", entry->fts_path); 176 continue; 177 } 178 #define BADCH " \t\n\\'\"" 179 if (isxargs && strpbrk(entry->fts_path, BADCH)) { 180 (void)fflush(stdout); 181 warnx("%s: illegal path", entry->fts_path); 182 continue; 183 } 184 185 /* 186 * call all the functions in the execution plan until one is 187 * false or all have been executed. This is where we do all 188 * the work specified by the user on the command line. 189 */ 190 for (p = plan; p && (p->eval)(p, entry); p = p->next); 191 } 192 (void)fts_close(tree); 193 } 194