findutils/find.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini find implementation for busybox
   4  *
   5  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6  *
   7  * Reworked by David Douthitt <n9ubh@callsign.net> and
   8  *  Matt Kraai <kraai@alumni.carnegiemellon.edu>.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  */
  25
  26 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <dirent.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <fnmatch.h>
  32 #include <time.h>
  33 #include <ctype.h>
  34 #include "busybox.h"
  35
  36 //XXX just found out about libbb/messages.c . maybe move stuff there ? - ghoz
  37 static const char msg_req_arg[] = "option `%s' requires an argument";
  38 static const char msg_invalid_arg[] = "invalid argument `%s' to `%s'";
  39
  40 static char *pattern;
  41
  42 #ifdef CONFIG_FEATURE_FIND_TYPE
  43 static int type_mask = 0;
  44 #endif
  45
  46 #ifdef CONFIG_FEATURE_FIND_PERM
  47 static char perm_char = 0;
  48 static int perm_mask = 0;
  49 #endif
  50
  51 #ifdef CONFIG_FEATURE_FIND_MTIME
  52 static char mtime_char;
  53 static int mtime_days;
  54 #endif
  55
  56 #ifdef CONFIG_FEATURE_FIND_MMIN
  57 static char mmin_char;
  58 static int mmin_mins;
  59 #endif
  60
  61 #ifdef CONFIG_FEATURE_FIND_XDEV
  62 static dev_t *xdev_dev;
  63 static int xdev_count = 0;
  64 #endif
  65
  66 #ifdef CONFIG_FEATURE_FIND_NEWER
  67 static time_t newer_mtime;
  68 #endif
  69
  70 #ifdef CONFIG_FEATURE_FIND_INUM
  71 static ino_t inode_num;
  72 #endif
  73
  74 #ifdef CONFIG_FEATURE_FIND_EXEC
  75 static char **exec_str;
  76 static int num_matches;
  77 static int exec_opt;
  78 #endif
  79
  80 static int fileAction(const char *fileName, struct stat *statbuf, void* junk)
  81 {
  82         if (pattern != NULL) {
  83                 const char *tmp = strrchr(fileName, '/');
  84
  85                 if (tmp == NULL)
  86                         tmp = fileName;
  87                 else
  88                         tmp++;
  89                 if (!(fnmatch(pattern, tmp, FNM_PERIOD) == 0))
  90                         goto no_match;
  91         }
  92 #ifdef CONFIG_FEATURE_FIND_TYPE
  93         if (type_mask != 0) {
  94                 if (!((statbuf->st_mode & S_IFMT) == type_mask))
  95                         goto no_match;
  96         }
  97 #endif
  98 #ifdef CONFIG_FEATURE_FIND_PERM
  99         if (perm_mask != 0) {
 100                 if (!((isdigit(perm_char) && (statbuf->st_mode & 07777) == perm_mask) ||
 101                          (perm_char == '-' && (statbuf->st_mode & perm_mask) == perm_mask) ||
 102                          (perm_char == '+' && (statbuf->st_mode & perm_mask) != 0)))
 103                         goto no_match;
 104         }
 105 #endif
 106 #ifdef CONFIG_FEATURE_FIND_MTIME
 107         if (mtime_char != 0) {
 108                 time_t file_age = time(NULL) - statbuf->st_mtime;
 109                 time_t mtime_secs = mtime_days * 24 * 60 * 60;
 110                 if (!((isdigit(mtime_char) && file_age >= mtime_secs &&
 111                                                 file_age < mtime_secs + 24 * 60 * 60) ||
 112                                 (mtime_char == '+' && file_age >= mtime_secs + 24 * 60 * 60) ||
 113                                 (mtime_char == '-' && file_age < mtime_secs)))
 114                         goto no_match;
 115         }
 116 #endif
 117 #ifdef CONFIG_FEATURE_FIND_MMIN
 118         if (mmin_char != 0) {
 119                 time_t file_age = time(NULL) - statbuf->st_mtime;
 120                 time_t mmin_secs = mmin_mins * 60;
 121                 if (!((isdigit(mmin_char) && file_age >= mmin_secs &&
 122                                                 file_age < mmin_secs + 60) ||
 123                                 (mmin_char == '+' && file_age >= mmin_secs + 60) ||
 124                                 (mmin_char == '-' && file_age < mmin_secs)))
 125                         goto no_match;
 126         }
 127 #endif
 128 #ifdef CONFIG_FEATURE_FIND_XDEV
 129         if (xdev_count) {
 130                 int i;
 131                 for (i=0; i<xdev_count; i++) {
 132                         if (xdev_dev[i] == statbuf-> st_dev)
 133                                 break;
 134                 }
 135                 if (i == xdev_count) {
 136                         if(S_ISDIR(statbuf->st_mode))
 137                                 return SKIP;
 138                         else
 139                                 goto no_match;
 140                 }
 141         }
 142 #endif
 143 #ifdef CONFIG_FEATURE_FIND_NEWER
 144         if (newer_mtime != 0) {
 145                 time_t file_age = newer_mtime - statbuf->st_mtime;
 146                 if (file_age >= 0)
 147                         goto no_match;
 148         }
 149 #endif
 150 #ifdef CONFIG_FEATURE_FIND_INUM
 151         if (inode_num != 0) {
 152                 if (!(statbuf->st_ino == inode_num))
 153                         goto no_match;
 154         }
 155 #endif
 156 #ifdef CONFIG_FEATURE_FIND_EXEC
 157         if (exec_opt) {
 158                 int i;
 159                 char *cmd_string = "";
 160                 for (i = 0; i < num_matches; i++)
 161                         cmd_string = bb_xasprintf("%s%s%s", cmd_string, exec_str[i], fileName);
 162                 cmd_string = bb_xasprintf("%s%s", cmd_string, exec_str[num_matches]);
 163                 system(cmd_string);
 164                 goto no_match;
 165         }
 166 #endif
 167
 168         puts(fileName);
 169 no_match:
 170         return (TRUE);
 171 }
 172
 173 #ifdef CONFIG_FEATURE_FIND_TYPE
 174 static int find_type(char *type)
 175 {
 176         int mask = 0;
 177
 178         switch (type[0]) {
 179                 case 'b':
 180                         mask = S_IFBLK;
 181                         break;
 182                 case 'c':
 183                         mask = S_IFCHR;
 184                         break;
 185                 case 'd':
 186                         mask = S_IFDIR;
 187                         break;
 188                 case 'p':
 189                         mask = S_IFIFO;
 190                         break;
 191                 case 'f':
 192                         mask = S_IFREG;
 193                         break;
 194                 case 'l':
 195                         mask = S_IFLNK;
 196                         break;
 197                 case 's':
 198                         mask = S_IFSOCK;
 199                         break;
 200         }
 201
 202         if (mask == 0 || type[1] != '\0')
 203                 bb_error_msg_and_die(msg_invalid_arg, type, "-type");
 204
 205         return mask;
 206 }
 207 #endif
 208
 209 int find_main(int argc, char **argv)
 210 {
 211         int dereference = FALSE;
 212         int i, firstopt, status = EXIT_SUCCESS;
 213
 214         for (firstopt = 1; firstopt < argc; firstopt++) {
 215                 if (argv[firstopt][0] == '-')
 216                         break;
 217         }
 218
 219         /* Parse any options */
 220         for (i = firstopt; i < argc; i++) {
 221                 if (strcmp(argv[i], "-follow") == 0)
 222                         dereference = TRUE;
 223                 else if (strcmp(argv[i], "-print") == 0) {
 224                         ;
 225                         }
 226                 else if (strcmp(argv[i], "-name") == 0) {
 227                         if (++i == argc)
 228                                 bb_error_msg_and_die(msg_req_arg, "-name");
 229                         pattern = argv[i];
 230 #ifdef CONFIG_FEATURE_FIND_TYPE
 231                 } else if (strcmp(argv[i], "-type") == 0) {
 232                         if (++i == argc)
 233                                 bb_error_msg_and_die(msg_req_arg, "-type");
 234                         type_mask = find_type(argv[i]);
 235 #endif
 236 #ifdef CONFIG_FEATURE_FIND_PERM
 237                 } else if (strcmp(argv[i], "-perm") == 0) {
 238                         char *end;
 239                         if (++i == argc)
 240                                 bb_error_msg_and_die(msg_req_arg, "-perm");
 241                         perm_mask = strtol(argv[i], &end, 8);
 242                         if ((end[0] != '\0') || (perm_mask > 07777))
 243                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-perm");
 244                         if ((perm_char = argv[i][0]) == '-')
 245                                 perm_mask = -perm_mask;
 246 #endif
 247 #ifdef CONFIG_FEATURE_FIND_MTIME
 248                 } else if (strcmp(argv[i], "-mtime") == 0) {
 249                         char *end;
 250                         if (++i == argc)
 251                                 bb_error_msg_and_die(msg_req_arg, "-mtime");
 252                         mtime_days = strtol(argv[i], &end, 10);
 253                         if (end[0] != '\0')
 254                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-mtime");
 255                         if ((mtime_char = argv[i][0]) == '-')
 256                                 mtime_days = -mtime_days;
 257 #endif
 258 #ifdef CONFIG_FEATURE_FIND_MMIN
 259                 } else if (strcmp(argv[i], "-mmin") == 0) {
 260                         char *end;
 261                         if (++i == argc)
 262                                 bb_error_msg_and_die(msg_req_arg, "-mmin");
 263                         mmin_mins = strtol(argv[i], &end, 10);
 264                         if (end[0] != '\0')
 265                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-mmin");
 266                         if ((mmin_char = argv[i][0]) == '-')
 267                                 mmin_mins = -mmin_mins;
 268 #endif
 269 #ifdef CONFIG_FEATURE_FIND_XDEV
 270                 } else if (strcmp(argv[i], "-xdev") == 0) {
 271                         struct stat stbuf;
 272
 273                         xdev_count = ( firstopt - 1 ) ? ( firstopt - 1 ) : 1;
 274                         xdev_dev = xmalloc ( xdev_count * sizeof( dev_t ));
 275
 276                         if ( firstopt == 1 ) {
 277                                 xstat ( ".", &stbuf );
 278                                 xdev_dev [0] = stbuf. st_dev;
 279                         }
 280                         else {
 281
 282                                 for (i = 1; i < firstopt; i++) {
 283                                         xstat ( argv [i], &stbuf );
 284                                         xdev_dev [i-1] = stbuf. st_dev;
 285                                 }
 286                         }
 287 #endif
 288 #ifdef CONFIG_FEATURE_FIND_NEWER
 289                 } else if (strcmp(argv[i], "-newer") == 0) {
 290                         struct stat stat_newer;
 291                         if (++i == argc)
 292                                 bb_error_msg_and_die(msg_req_arg, "-newer");
 293                         xstat (argv[i], &stat_newer);
 294                         newer_mtime = stat_newer.st_mtime;
 295 #endif
 296 #ifdef CONFIG_FEATURE_FIND_INUM
 297                 } else if (strcmp(argv[i], "-inum") == 0) {
 298                         char *end;
 299                         if (++i == argc)
 300                                 bb_error_msg_and_die(msg_req_arg, "-inum");
 301                         inode_num = strtol(argv[i], &end, 10);
 302                         if (end[0] != '\0')
 303                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-inum");
 304 #endif
 305 #ifdef CONFIG_FEATURE_FIND_EXEC
 306                 } else if (strcmp(argv[i], "-exec") == 0) {
 307                         int b_pos;
 308                         char *cmd_string = "";
 309
 310                         while (i++) {
 311                                 if (i == argc)
 312                                         bb_error_msg_and_die(msg_req_arg, "-exec");
 313                                 if (*argv[i] == ';')
 314                                         break;
 315                                 cmd_string = bb_xasprintf("%s %s", cmd_string, argv[i]);
 316                         }
 317
 318                         if (*cmd_string == 0)
 319                                 bb_error_msg_and_die(msg_req_arg, "-exec");
 320                         cmd_string++;
 321                         exec_str = xmalloc(sizeof(char *));
 322
 323                         while ((b_pos = strstr(cmd_string, "{}") - cmd_string), (b_pos >= 0)) {
 324                                 num_matches++;
 325                                 exec_str = xrealloc(exec_str, (num_matches + 1) * sizeof(char *));
 326                                 exec_str[num_matches - 1] = bb_xstrndup(cmd_string, b_pos);
 327                                 cmd_string += b_pos + 2;
 328                         }
 329                         exec_str[num_matches] = bb_xstrdup(cmd_string);
 330                         exec_opt = 1;
 331 #endif
 332                 } else
 333                         bb_show_usage();
 334         }
 335
 336         if (firstopt == 1) {
 337                 if (! recursive_action(".", TRUE, dereference, FALSE, fileAction,
 338                                         fileAction, NULL))
 339                         status = EXIT_FAILURE;
 340         } else {
 341                 for (i = 1; i < firstopt; i++) {
 342                         if (! recursive_action(argv[i], TRUE, dereference, FALSE, fileAction,
 343                                                 fileAction, NULL))
 344                                 status = EXIT_FAILURE;
 345                 }
 346         }
 347
 348         return status;
 349 }