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 <stdio.h>
  27 #include <unistd.h>
  28 #include <dirent.h>
  29
  30
  31 static char *pattern = NULL;
  32 static char *directory = ".";
  33 static int dereferenceFlag = FALSE;
  34
  35 static const char find_usage[] = "find [PATH...] [EXPRESSION]\n"
  36 #ifndef BB_FEATURE_TRIVIAL_HELP
  37         "\nSearch for files in a directory hierarchy.  The default PATH is\n"
  38         "the current directory; default EXPRESSION is '-print'\n\n"
  39         "\nEXPRESSION may consist of:\n"
  40         "\t-follow\t\tDereference symbolic links.\n"
  41         "\t-name PATTERN\tFile name (leading directories removed) matches PATTERN.\n"
  42         "\t-print\t\tprint the full file name followed by a newline to stdout.\n"
  43 #endif
  44         ;
  45
  46
  47 static int fileAction(const char *fileName, struct stat *statbuf, void* junk)
  48 {
  49         if (pattern == NULL)
  50                 fprintf(stdout, "%s\n", fileName);
  51         else {
  52                 char *tmp = strrchr(fileName, '/');
  53
  54                 if (tmp == NULL)
  55                         tmp = (char *) fileName;
  56                 else
  57                         tmp++;
  58                 if (check_wildcard_match(tmp, pattern) == TRUE)
  59                         fprintf(stdout, "%s\n", fileName);
  60         }
  61         return (TRUE);
  62 }
  63
  64 int find_main(int argc, char **argv)
  65 {
  66         /* peel off the "find" */
  67         argc--;
  68         argv++;
  69
  70         if (argc > 0 && **argv != '-') {
  71                 directory = *argv;
  72                 argc--;
  73                 argv++;
  74         }
  75
  76         /* Parse any options */
  77         while (argc > 0 && **argv == '-') {
  78                 int stopit = FALSE;
  79
  80                 while (*++(*argv) && stopit == FALSE)
  81                         switch (**argv) {
  82                         case 'f':
  83                                 if (strcmp(*argv, "follow") == 0) {
  84                                         argc--;
  85                                         argv++;
  86                                         dereferenceFlag = TRUE;
  87                                 }
  88                                 break;
  89                         case 'n':
  90                                 if (strcmp(*argv, "name") == 0) {
  91                                         if (argc-- > 1) {
  92                                                 pattern = *(++argv);
  93                                                 stopit = TRUE;
  94                                         } else {
  95                                                 usage(find_usage);
  96                                         }
  97                                 }
  98                                 break;
  99                         case '-':
 100                                 /* Ignore all long options */
 101                                 break;
 102                         default:
 103                                 usage(find_usage);
 104                         }
 105                 if (argc-- > 1)
 106                         argv++;
 107                 if (**argv != '-')
 108                         break;
 109                 else
 110                         break;
 111         }
 112
 113         if (recursiveAction(directory, TRUE, FALSE, FALSE,
 114                                                 fileAction, fileAction, NULL) == FALSE) {
 115                 exit(FALSE);
 116         }
 117
 118         return(TRUE);
 119 }