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 #ifdef CONFIG_FEATURE_FIND_XDEV
  83         if (S_ISDIR(statbuf->st_mode) && xdev_count) {
  84                 int i;
  85                 for (i=0; i<xdev_count; i++) {
  86                         if (xdev_dev[i] != statbuf->st_dev)
  87                                 return SKIP;
  88                 }
  89         }
  90 #endif
  91         if (pattern != NULL) {
  92                 const char *tmp = strrchr(fileName, '/');
  93
  94                 if (tmp == NULL)
  95                         tmp = fileName;
  96                 else
  97                         tmp++;
  98                 if (!(fnmatch(pattern, tmp, FNM_PERIOD) == 0))
  99                         goto no_match;
 100         }
 101 #ifdef CONFIG_FEATURE_FIND_TYPE
 102         if (type_mask != 0) {
 103                 if (!((statbuf->st_mode & S_IFMT) == type_mask))
 104                         goto no_match;
 105         }
 106 #endif
 107 #ifdef CONFIG_FEATURE_FIND_PERM
 108         if (perm_mask != 0) {
 109                 if (!((isdigit(perm_char) && (statbuf->st_mode & 07777) == perm_mask) ||
 110                          (perm_char == '-' && (statbuf->st_mode & perm_mask) == perm_mask) ||
 111                          (perm_char == '+' && (statbuf->st_mode & perm_mask) != 0)))
 112                         goto no_match;
 113         }
 114 #endif
 115 #ifdef CONFIG_FEATURE_FIND_MTIME
 116         if (mtime_char != 0) {
 117                 time_t file_age = time(NULL) - statbuf->st_mtime;
 118                 time_t mtime_secs = mtime_days * 24 * 60 * 60;
 119                 if (!((isdigit(mtime_char) && file_age >= mtime_secs &&
 120                                                 file_age < mtime_secs + 24 * 60 * 60) ||
 121                                 (mtime_char == '+' && file_age >= mtime_secs + 24 * 60 * 60) ||
 122                                 (mtime_char == '-' && file_age < mtime_secs)))
 123                         goto no_match;
 124         }
 125 #endif
 126 #ifdef CONFIG_FEATURE_FIND_MMIN
 127         if (mmin_char != 0) {
 128                 time_t file_age = time(NULL) - statbuf->st_mtime;
 129                 time_t mmin_secs = mmin_mins * 60;
 130                 if (!((isdigit(mmin_char) && file_age >= mmin_secs &&
 131                                                 file_age < mmin_secs + 60) ||
 132                                 (mmin_char == '+' && file_age >= mmin_secs + 60) ||
 133                                 (mmin_char == '-' && file_age < mmin_secs)))
 134                         goto no_match;
 135         }
 136 #endif
 137 #ifdef CONFIG_FEATURE_FIND_NEWER
 138         if (newer_mtime != 0) {
 139                 time_t file_age = newer_mtime - statbuf->st_mtime;
 140                 if (file_age >= 0)
 141                         goto no_match;
 142         }
 143 #endif
 144 #ifdef CONFIG_FEATURE_FIND_INUM
 145         if (inode_num != 0) {
 146                 if (!(statbuf->st_ino == inode_num))
 147                         goto no_match;
 148         }
 149 #endif
 150 #ifdef CONFIG_FEATURE_FIND_EXEC
 151         if (exec_opt) {
 152                 int i;
 153                 char *cmd_string = "";
 154                 for (i = 0; i < num_matches; i++)
 155                         cmd_string = bb_xasprintf("%s%s%s", cmd_string, exec_str[i], fileName);
 156                 cmd_string = bb_xasprintf("%s%s", cmd_string, exec_str[num_matches]);
 157                 system(cmd_string);
 158                 goto no_match;
 159         }
 160 #endif
 161
 162         puts(fileName);
 163 no_match:
 164         return (TRUE);
 165 }
 166
 167 #ifdef CONFIG_FEATURE_FIND_TYPE
 168 static int find_type(char *type)
 169 {
 170         int mask = 0;
 171
 172         switch (type[0]) {
 173                 case 'b':
 174                         mask = S_IFBLK;
 175                         break;
 176                 case 'c':
 177                         mask = S_IFCHR;
 178                         break;
 179                 case 'd':
 180                         mask = S_IFDIR;
 181                         break;
 182                 case 'p':
 183                         mask = S_IFIFO;
 184                         break;
 185                 case 'f':
 186                         mask = S_IFREG;
 187                         break;
 188                 case 'l':
 189                         mask = S_IFLNK;
 190                         break;
 191                 case 's':
 192                         mask = S_IFSOCK;
 193                         break;
 194         }
 195
 196         if (mask == 0 || type[1] != '\0')
 197                 bb_error_msg_and_die(msg_invalid_arg, type, "-type");
 198
 199         return mask;
 200 }
 201 #endif
 202
 203 int find_main(int argc, char **argv)
 204 {
 205         int dereference = FALSE;
 206         int i, firstopt, status = EXIT_SUCCESS;
 207
 208         for (firstopt = 1; firstopt < argc; firstopt++) {
 209                 if (argv[firstopt][0] == '-')
 210                         break;
 211         }
 212
 213         /* Parse any options */
 214         for (i = firstopt; i < argc; i++) {
 215                 if (strcmp(argv[i], "-follow") == 0)
 216                         dereference = TRUE;
 217                 else if (strcmp(argv[i], "-print") == 0) {
 218                         ;
 219                         }
 220                 else if (strcmp(argv[i], "-name") == 0) {
 221                         if (++i == argc)
 222                                 bb_error_msg_and_die(msg_req_arg, "-name");
 223                         pattern = argv[i];
 224 #ifdef CONFIG_FEATURE_FIND_TYPE
 225                 } else if (strcmp(argv[i], "-type") == 0) {
 226                         if (++i == argc)
 227                                 bb_error_msg_and_die(msg_req_arg, "-type");
 228                         type_mask = find_type(argv[i]);
 229 #endif
 230 #ifdef CONFIG_FEATURE_FIND_PERM
 231                 } else if (strcmp(argv[i], "-perm") == 0) {
 232                         char *end;
 233                         if (++i == argc)
 234                                 bb_error_msg_and_die(msg_req_arg, "-perm");
 235                         perm_mask = strtol(argv[i], &end, 8);
 236                         if ((end[0] != '\0') || (perm_mask > 07777))
 237                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-perm");
 238                         if ((perm_char = argv[i][0]) == '-')
 239                                 perm_mask = -perm_mask;
 240 #endif
 241 #ifdef CONFIG_FEATURE_FIND_MTIME
 242                 } else if (strcmp(argv[i], "-mtime") == 0) {
 243                         char *end;
 244                         if (++i == argc)
 245                                 bb_error_msg_and_die(msg_req_arg, "-mtime");
 246                         mtime_days = strtol(argv[i], &end, 10);
 247                         if (end[0] != '\0')
 248                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-mtime");
 249                         if ((mtime_char = argv[i][0]) == '-')
 250                                 mtime_days = -mtime_days;
 251 #endif
 252 #ifdef CONFIG_FEATURE_FIND_MMIN
 253                 } else if (strcmp(argv[i], "-mmin") == 0) {
 254                         char *end;
 255                         if (++i == argc)
 256                                 bb_error_msg_and_die(msg_req_arg, "-mmin");
 257                         mmin_mins = strtol(argv[i], &end, 10);
 258                         if (end[0] != '\0')
 259                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-mmin");
 260                         if ((mmin_char = argv[i][0]) == '-')
 261                                 mmin_mins = -mmin_mins;
 262 #endif
 263 #ifdef CONFIG_FEATURE_FIND_XDEV
 264                 } else if (strcmp(argv[i], "-xdev") == 0) {
 265                         struct stat stbuf;
 266
 267                         xdev_count = ( firstopt - 1 ) ? ( firstopt - 1 ) : 1;
 268                         xdev_dev = xmalloc ( xdev_count * sizeof( dev_t ));
 269
 270                         if ( firstopt == 1 ) {
 271                                 xstat ( ".", &stbuf );
 272                                 xdev_dev [0] = stbuf. st_dev;
 273                         }
 274                         else {
 275
 276                                 for (i = 1; i < firstopt; i++) {
 277                                         xstat ( argv [i], &stbuf );
 278                                         xdev_dev [i-1] = stbuf. st_dev;
 279                                 }
 280                         }
 281 #endif
 282 #ifdef CONFIG_FEATURE_FIND_NEWER
 283                 } else if (strcmp(argv[i], "-newer") == 0) {
 284                         struct stat stat_newer;
 285                         if (++i == argc)
 286                                 bb_error_msg_and_die(msg_req_arg, "-newer");
 287                         xstat (argv[i], &stat_newer);
 288                         newer_mtime = stat_newer.st_mtime;
 289 #endif
 290 #ifdef CONFIG_FEATURE_FIND_INUM
 291                 } else if (strcmp(argv[i], "-inum") == 0) {
 292                         char *end;
 293                         if (++i == argc)
 294                                 bb_error_msg_and_die(msg_req_arg, "-inum");
 295                         inode_num = strtol(argv[i], &end, 10);
 296                         if (end[0] != '\0')
 297                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-inum");
 298 #endif
 299 #ifdef CONFIG_FEATURE_FIND_EXEC
 300                 } else if (strcmp(argv[i], "-exec") == 0) {
 301                         int b_pos;
 302                         char *cmd_string = "";
 303
 304                         while (i++) {
 305                                 if (i == argc)
 306                                         bb_error_msg_and_die(msg_req_arg, "-exec");
 307                                 if (*argv[i] == ';')
 308                                         break;
 309                                 cmd_string = bb_xasprintf("%s %s", cmd_string, argv[i]);
 310                         }
 311
 312                         if (*cmd_string == 0)
 313                                 bb_error_msg_and_die(msg_req_arg, "-exec");
 314                         cmd_string++;
 315                         exec_str = xmalloc(sizeof(char *));
 316
 317                         while ((b_pos = strstr(cmd_string, "{}") - cmd_string), (b_pos >= 0)) {
 318                                 num_matches++;
 319                                 exec_str = xrealloc(exec_str, (num_matches + 1) * sizeof(char *));
 320                                 exec_str[num_matches - 1] = bb_xstrndup(cmd_string, b_pos);
 321                                 cmd_string += b_pos + 2;
 322                         }
 323                         exec_str[num_matches] = bb_xstrdup(cmd_string);
 324                         exec_opt = 1;
 325 #endif
 326                 } else
 327                         bb_show_usage();
 328         }
 329
 330         if (firstopt == 1) {
 331                 if (! recursive_action(".", TRUE, dereference, FALSE, fileAction,
 332                                         fileAction, NULL))
 333                         status = EXIT_FAILURE;
 334         } else {
 335                 for (i = 1; i < firstopt; i++) {
 336                         if (! recursive_action(argv[i], TRUE, dereference, FALSE, fileAction,
 337                                                 fileAction, NULL))
 338                                 status = EXIT_FAILURE;
 339                 }
 340         }
 341
 342         return status;
 343 }