chmod_chown_chgrp.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini chown/chmod/chgrp 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 "busybox.h"
  26 #define BB_DECLARE_EXTERN
  27 #define bb_need_invalid_option
  28 #define bb_need_too_few_args
  29 #include "messages.c"
  30
  31 #include <stdio.h>
  32
  33
  34 static long uid = -1;
  35 static long gid = -1;
  36 static int whichApp;
  37 static char *theMode = NULL;
  38
  39
  40 #define CHGRP_APP   1
  41 #define CHOWN_APP   2
  42 #define CHMOD_APP   3
  43
  44 static int fileAction(const char *fileName, struct stat *statbuf, void* junk)
  45 {
  46         switch (whichApp) {
  47         case CHGRP_APP:
  48         case CHOWN_APP:
  49 #if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
  50                 if (lchown
  51                         (fileName, (whichApp == CHOWN_APP) ? uid : statbuf->st_uid,
  52                          (gid == -1) ? statbuf->st_gid : gid) == 0)
  53 #else
  54                 if (chown
  55                         (fileName, (whichApp == CHOWN_APP) ? uid : statbuf->st_uid,
  56                          (gid == -1) ? statbuf->st_gid : gid) == 0)
  57 #endif
  58                 {
  59                         return (TRUE);
  60                 }
  61                 break;
  62         case CHMOD_APP:
  63                 /* Parse the specified modes */
  64                 if (parse_mode(theMode, &(statbuf->st_mode)) == FALSE) {
  65                         error_msg_and_die( "unknown mode: %s\n", theMode);
  66                 }
  67                 if (chmod(fileName, statbuf->st_mode) == 0)
  68                         return (TRUE);
  69                 break;
  70         }
  71         perror(fileName);
  72         return (FALSE);
  73 }
  74
  75 int chmod_chown_chgrp_main(int argc, char **argv)
  76 {
  77         int stopIt = FALSE;
  78         int recursiveFlag = FALSE;
  79         char *groupName=NULL;
  80         char *p=NULL;
  81         const char *appUsage;
  82
  83         whichApp = (strcmp(applet_name, "chown") == 0)?
  84                         CHOWN_APP : (strcmp(applet_name, "chmod") == 0)?
  85                                 CHMOD_APP : CHGRP_APP;
  86
  87         appUsage = (whichApp == CHOWN_APP)?
  88                         chown_usage : (whichApp == CHMOD_APP) ? chmod_usage : chgrp_usage;
  89
  90         if (argc < 2)
  91                 usage(appUsage);
  92         argv++;
  93
  94         /* Parse options */
  95         while (--argc >= 0 && *argv && (**argv == '-')) {
  96                 while (stopIt==FALSE && *++(*argv)) {
  97                         switch (**argv) {
  98                                 case 'R':
  99                                         recursiveFlag = TRUE;
 100                                         break;
 101                                 default:
 102                                         theMode=*argv-1;
 103                                         stopIt = TRUE;
 104                         }
 105                 }
 106                 if (stopIt==TRUE)
 107                         break;
 108                 argv++;
 109         }
 110
 111         if (argc == 0 || *argv == NULL) {
 112                 error_msg(too_few_args);
 113         }
 114
 115         if (whichApp == CHMOD_APP) {
 116                 if (theMode==NULL)
 117                         theMode = *argv;
 118         } else {
 119
 120                 /* Find the selected group */
 121                 if (whichApp == CHGRP_APP) {
 122                         groupName = *argv;
 123                         gid = strtoul(groupName, &p, 10);       /* maybe it's already numeric */
 124                         if (groupName == p)
 125                                 gid = my_getgrnam(groupName);
 126                         if (gid == -1)
 127                                 goto bad_group;
 128                 } else {
 129                         groupName = strchr(*argv, '.');
 130                         if (groupName == NULL)
 131                                 groupName = strchr(*argv, ':');
 132                         if (groupName) {
 133                                 *groupName++ = '\0';
 134                                 gid = strtoul(groupName, &p, 10);
 135                                 if (groupName == p)
 136                                         gid = my_getgrnam(groupName);
 137                                 if (gid == -1)
 138                                         goto bad_group;
 139                         } else
 140                                 gid = -1;
 141                 }
 142
 143
 144                 /* Find the selected user (if appropriate)  */
 145                 if (whichApp == CHOWN_APP) {
 146                         uid = strtoul(*argv, &p, 10);   /* if numeric ... */
 147                         if (*argv == p)
 148                                 uid = my_getpwnam(*argv);
 149                         if (uid == -1) {
 150                                 error_msg_and_die( "unknown user name: %s\n", *argv);
 151                         }
 152                 }
 153         }
 154
 155         /* Ok, ready to do the deed now */
 156         if (argc < 1) {
 157                 error_msg_and_die(too_few_args);
 158         }
 159         while (argc-- > 1) {
 160                 if (recursive_action (*(++argv), recursiveFlag, FALSE, FALSE,
 161                                         fileAction, fileAction, NULL) == FALSE)
 162                         return EXIT_FAILURE;
 163         }
 164         return EXIT_SUCCESS;
 165
 166   bad_group:
 167         error_msg_and_die( "unknown group name: %s\n", groupName);
 168 }
 169
 170 /*
 171 Local Variables:
 172 c-file-style: "linux"
 173 c-basic-offset: 4
 174 tab-width: 4
 175 End:
 176 */