find.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini find implementation for busybox
   4  *
   5  *
   6  * Copyright (C) 1999,2000 by Lineo, inc.
   7  * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  *
  23  */
  24
  25 #include "internal.h"
  26 #include "regexp.h"
  27 #include <stdio.h>
  28 #include <unistd.h>
  29 #include <dirent.h>
  30
  31
  32 static char *pattern = NULL;
  33 static char *directory = ".";
  34 static int dereferenceFlag = FALSE;
  35
  36 static const char find_usage[] = "find [PATH...] [EXPRESSION]\n"
  37 #ifndef BB_FEATURE_TRIVIAL_HELP
  38         "\nSearch for files in a directory hierarchy.  The default PATH is\n"
  39         "the current directory; default EXPRESSION is '-print'\n\n"
  40         "\nEXPRESSION may consist of:\n"
  41         "\t-follow\t\tDereference symbolic links.\n"
  42         "\t-name PATTERN\tFile name (leading directories removed) matches PATTERN.\n"
  43         "\t-print\t\tprint the full file name followed by a newline to stdout.\n"
  44 #endif
  45         ;
  46
  47
  48 static int fileAction(const char *fileName, struct stat *statbuf, void* junk)
  49 {
  50         if (pattern == NULL)
  51                 fprintf(stdout, "%s\n", fileName);
  52         else {
  53                 char *tmp = strrchr(fileName, '/');
  54
  55                 if (tmp == NULL)
  56                         tmp = (char *) fileName;
  57                 else
  58                         tmp++;
  59                 if (check_wildcard_match(tmp, pattern) == TRUE)
  60                         fprintf(stdout, "%s\n", fileName);
  61         }
  62         return (TRUE);
  63 }
  64
  65 int find_main(int argc, char **argv)
  66 {
  67         /* peel off the "find" */
  68         argc--;
  69         argv++;
  70
  71         if (argc > 0 && **argv != '-') {
  72                 directory = *argv;
  73                 argc--;
  74                 argv++;
  75         }
  76
  77         /* Parse any options */
  78         while (argc > 0 && **argv == '-') {
  79                 int stopit = FALSE;
  80
  81                 while (*++(*argv) && stopit == FALSE)
  82                         switch (**argv) {
  83                         case 'f':
  84                                 if (strcmp(*argv, "follow") == 0) {
  85                                         argc--;
  86                                         argv++;
  87                                         dereferenceFlag = TRUE;
  88                                 }
  89                                 break;
  90                         case 'n':
  91                                 if (strcmp(*argv, "name") == 0) {
  92                                         if (argc-- > 1) {
  93                                                 pattern = *(++argv);
  94                                                 stopit = TRUE;
  95                                         } else {
  96                                                 usage(find_usage);
  97                                         }
  98                                 }
  99                                 break;
 100                         case '-':
 101                                 /* Ignore all long options */
 102                                 break;
 103                         default:
 104                                 usage(find_usage);
 105                         }
 106                 if (argc-- > 1)
 107                         argv++;
 108                 if (**argv != '-')
 109                         break;
 110                 else
 111                         break;
 112         }
 113
 114         if (recursiveAction(directory, TRUE, FALSE, FALSE,
 115                                                 fileAction, fileAction, NULL) == FALSE) {
 116                 exit(FALSE);
 117         }
 118
 119         exit(TRUE);
 120 }