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 #if ENABLE_FEATURE_FIND_TYPE
  43 static int type_mask = 0;
  44 #endif
  45
  46 #if ENABLE_FEATURE_FIND_PERM
  47 static char perm_char = 0;
  48 static int perm_mask = 0;
  49 #endif
  50
  51 #if ENABLE_FEATURE_FIND_MTIME
  52 static char mtime_char;
  53 static int mtime_days;
  54 #endif
  55
  56 #if ENABLE_FEATURE_FIND_XDEV
  57 static dev_t *xdev_dev;
  58 static int xdev_count = 0;
  59 #endif
  60
  61 #if ENABLE_FEATURE_FIND_NEWER
  62 static time_t newer_mtime;
  63 #endif
  64
  65 #if ENABLE_FEATURE_FIND_INUM
  66 static ino_t inode_num;
  67 #endif
  68
  69 #if ENABLE_FEATURE_FIND_EXEC
  70 static char **exec_str;
  71 static int num_matches;
  72 static int exec_opt;
  73 #endif
  74
  75 static int fileAction(const char *fileName, struct stat *statbuf, void* junk)
  76 {
  77         if (pattern != NULL) {
  78                 const char *tmp = strrchr(fileName, '/');
  79
  80                 if (tmp == NULL)
  81                         tmp = fileName;
  82                 else
  83                         tmp++;
  84                 if (!(fnmatch(pattern, tmp, FNM_PERIOD) == 0))
  85                         goto no_match;
  86         }
  87         if (ENABLE_FEATURE_FIND_TYPE && type_mask != 0) {
  88                 if (!((statbuf->st_mode & S_IFMT) == type_mask))
  89                         goto no_match;
  90         }
  91         if (ENABLE_FEATURE_FIND_PERM && perm_mask != 0) {
  92                 if (!((isdigit(perm_char) && (statbuf->st_mode & 07777) == perm_mask) ||
  93                          (perm_char == '-' && (statbuf->st_mode & perm_mask) == perm_mask) ||
  94                          (perm_char == '+' && (statbuf->st_mode & perm_mask) != 0)))
  95                         goto no_match;
  96         }
  97         if (ENABLE_FEATURE_FIND_MTIME && mtime_char != 0) {
  98                 time_t file_age = time(NULL) - statbuf->st_mtime;
  99                 time_t mtime_secs = mtime_days * 24 * 60 * 60;
 100                 if (!((isdigit(mtime_char) && file_age >= mtime_secs &&
 101                                                 file_age < mtime_secs + 24 * 60 * 60) ||
 102                                 (mtime_char == '+' && file_age >= mtime_secs + 24 * 60 * 60) ||
 103                                 (mtime_char == '-' && file_age < mtime_secs)))
 104                         goto no_match;
 105         }
 106         if (ENABLE_FEATURE_FIND_XDEV && xdev_count) {
 107                 int i;
 108                 for (i=0; i<xdev_count; i++) {
 109                         if (xdev_dev[i] == statbuf-> st_dev)
 110                                 break;
 111                 }
 112                 if (i == xdev_count) {
 113                         if(S_ISDIR(statbuf->st_mode))
 114                                 return SKIP;
 115                         else
 116                                 goto no_match;
 117                 }
 118         }
 119         if (ENABLE_FEATURE_FIND_NEWER && newer_mtime != 0) {
 120                 time_t file_age = newer_mtime - statbuf->st_mtime;
 121                 if (file_age >= 0)
 122                         goto no_match;
 123         }
 124         if (ENABLE_FEATURE_FIND_INUM && inode_num != 0) {
 125                 if (!(statbuf->st_ino == inode_num))
 126                         goto no_match;
 127         }
 128         if (ENABLE_FEATURE_FIND_EXEC && exec_opt) {
 129                 int i;
 130                 char *cmd_string = "";
 131                 for (i = 0; i < num_matches; i++)
 132                         cmd_string = bb_xasprintf("%s%s%s", cmd_string, exec_str[i], fileName);
 133                 cmd_string = bb_xasprintf("%s%s", cmd_string, exec_str[num_matches]);
 134                 system(cmd_string);
 135                 goto no_match;
 136         }
 137
 138         puts(fileName);
 139 no_match:
 140         return (TRUE);
 141 }
 142
 143 #if ENABLE_FEATURE_FIND_TYPE
 144 static int find_type(char *type)
 145 {
 146         int mask = 0;
 147
 148         switch (type[0]) {
 149                 case 'b':
 150                         mask = S_IFBLK;
 151                         break;
 152                 case 'c':
 153                         mask = S_IFCHR;
 154                         break;
 155                 case 'd':
 156                         mask = S_IFDIR;
 157                         break;
 158                 case 'p':
 159                         mask = S_IFIFO;
 160                         break;
 161                 case 'f':
 162                         mask = S_IFREG;
 163                         break;
 164                 case 'l':
 165                         mask = S_IFLNK;
 166                         break;
 167                 case 's':
 168                         mask = S_IFSOCK;
 169                         break;
 170         }
 171
 172         if (mask == 0 || type[1] != '\0')
 173                 bb_error_msg_and_die(msg_invalid_arg, type, "-type");
 174
 175         return mask;
 176 }
 177 #endif
 178
 179 int find_main(int argc, char **argv)
 180 {
 181         int dereference = FALSE;
 182         int i, firstopt, status = EXIT_SUCCESS;
 183
 184         for (firstopt = 1; firstopt < argc; firstopt++) {
 185                 if (argv[firstopt][0] == '-')
 186                         break;
 187         }
 188
 189         /* Parse any options */
 190         for (i = firstopt; i < argc; i++) {
 191                 if (strcmp(argv[i], "-follow") == 0)
 192                         dereference = TRUE;
 193                 else if (strcmp(argv[i], "-print") == 0) {
 194                         ;
 195                         }
 196                 else if (strcmp(argv[i], "-name") == 0) {
 197                         if (++i == argc)
 198                                 bb_error_msg_and_die(msg_req_arg, "-name");
 199                         pattern = argv[i];
 200                 } else if (ENABLE_FEATURE_FIND_TYPE && strcmp(argv[i], "-type") == 0) {
 201                         if (++i == argc)
 202                                 bb_error_msg_and_die(msg_req_arg, "-type");
 203                         type_mask = find_type(argv[i]);
 204                 } else if (ENABLE_FEATURE_FIND_PERM && strcmp(argv[i], "-perm") == 0) {
 205                         char *end;
 206                         if (++i == argc)
 207                                 bb_error_msg_and_die(msg_req_arg, "-perm");
 208                         perm_mask = strtol(argv[i], &end, 8);
 209                         if ((end[0] != '\0') || (perm_mask > 07777))
 210                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-perm");
 211                         if ((perm_char = argv[i][0]) == '-')
 212                                 perm_mask = -perm_mask;
 213                 } else if (ENABLE_FEATURE_FIND_MTIME && strcmp(argv[i], "-mtime") == 0) {
 214                         char *end;
 215                         if (++i == argc)
 216                                 bb_error_msg_and_die(msg_req_arg, "-mtime");
 217                         mtime_days = strtol(argv[i], &end, 10);
 218                         if (end[0] != '\0')
 219                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-mtime");
 220                         if ((mtime_char = argv[i][0]) == '-')
 221                                 mtime_days = -mtime_days;
 222                 } else if (ENABLE_FEATURE_FIND_XDEV && strcmp(argv[i], "-xdev") == 0) {
 223                         struct stat stbuf;
 224
 225                         xdev_count = ( firstopt - 1 ) ? ( firstopt - 1 ) : 1;
 226                         xdev_dev = xmalloc ( xdev_count * sizeof( dev_t ));
 227
 228                         if ( firstopt == 1 ) {
 229                                 if ( stat ( ".", &stbuf ) < 0 )
 230                                         bb_error_msg_and_die("could not stat '.'" );
 231                                 xdev_dev [0] = stbuf. st_dev;
 232                         }
 233                         else {
 234
 235                                 for (i = 1; i < firstopt; i++) {
 236                                         if ( stat ( argv [i], &stbuf ) < 0 )
 237                                                 bb_error_msg_and_die("could not stat '%s'", argv [i] );
 238                                         xdev_dev [i-1] = stbuf. st_dev;
 239                                 }
 240                         }
 241                 } else if (ENABLE_FEATURE_FIND_NEWER && strcmp(argv[i], "-newer") == 0) {
 242                         struct stat stat_newer;
 243                         if (++i == argc)
 244                                 bb_error_msg_and_die(msg_req_arg, "-newer");
 245                     if (stat (argv[i], &stat_newer) != 0)
 246                                 bb_error_msg_and_die("file %s not found", argv[i]);
 247                         newer_mtime = stat_newer.st_mtime;
 248                 } else if (ENABLE_FEATURE_FIND_INUM && strcmp(argv[i], "-inum") == 0) {
 249                         char *end;
 250                         if (++i == argc)
 251                                 bb_error_msg_and_die(msg_req_arg, "-inum");
 252                         inode_num = strtol(argv[i], &end, 10);
 253                         if (end[0] != '\0')
 254                                 bb_error_msg_and_die(msg_invalid_arg, argv[i], "-inum");
 255                 } else if (ENABLE_FEATURE_FIND_EXEC && strcmp(argv[i], "-exec") == 0) {
 256                         int b_pos;
 257                         char *cmd_string = "";
 258
 259                         while (i++) {
 260                                 if (i == argc)
 261                                         bb_error_msg_and_die(msg_req_arg, "-exec");
 262                                 if (*argv[i] == ';')
 263                                         break;
 264                                 cmd_string = bb_xasprintf("%s %s", cmd_string, argv[i]);
 265                         }
 266
 267                         if (*cmd_string == 0)
 268                                 bb_error_msg_and_die(msg_req_arg, "-exec");
 269                         cmd_string++;
 270                         exec_str = xmalloc(sizeof(char *));
 271
 272                         while ((b_pos = strstr(cmd_string, "{}") - cmd_string), (b_pos >= 0)) {
 273                                 num_matches++;
 274                                 exec_str = xrealloc(exec_str, (num_matches + 1) * sizeof(char *));
 275                                 exec_str[num_matches - 1] = bb_xstrndup(cmd_string, b_pos);
 276                                 cmd_string += b_pos + 2;
 277                         }
 278                         exec_str[num_matches] = bb_xstrdup(cmd_string);
 279                         exec_opt = 1;
 280                 } else
 281                         bb_show_usage();
 282         }
 283
 284         if (firstopt == 1) {
 285                 if (! recursive_action(".", TRUE, dereference, FALSE, fileAction,
 286                                         fileAction, NULL))
 287                         status = EXIT_FAILURE;
 288         } else {
 289                 for (i = 1; i < firstopt; i++) {
 290                         if (! recursive_action(argv[i], TRUE, dereference, FALSE, fileAction,
 291                                                 fileAction, NULL))
 292                                 status = EXIT_FAILURE;
 293                 }
 294         }
 295
 296         return status;
 297 }