src/showattr.c

   1 // $Id: showattr.c,v 1.1.4.1 2003/11/18 22:31:10 ensc Exp $
   2
   3 // Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
   4 // based on showattr.cc by Jacques Gelinas
   5 //
   6 // This program is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include <config.h>
  22 #endif
  23 #include "compat.h"
  24
  25 #include <stdio.h>
  26 #include <errno.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29 #include <fcntl.h>
  30 #include <sys/ioctl.h>
  31
  32 #include "ext2fs.h"
  33
  34
  35 // Patch to help compile this utility on unpatched kernel source
  36 #ifndef EXT2_IMMUTABLE_FILE_FL
  37         #define EXT2_IMMUTABLE_FILE_FL  0x00000010
  38         #define EXT2_IMMUTABLE_LINK_FL  0x00008000
  39 #endif
  40
  41 /*
  42         Get the extended attributes of a file
  43 */
  44 static int getext2flags (const char *fname, long *flags)
  45 {
  46         int ret = -1;
  47         int fd = open (fname,O_RDONLY);
  48         if (fd == -1){
  49                 fprintf (stderr,"Can't open file %s (%s)\n",fname,strerror(errno));
  50         }else{
  51                 *flags = 0;
  52                 ret = ioctl (fd,EXT2_IOC_GETFLAGS,flags);
  53                 close (fd);
  54                 if (ret == -1){
  55                         fprintf (stderr,"Can't get ext2 flags on file %s (%s)\n"
  56                                 ,fname,strerror(errno));
  57                 }
  58         }
  59         return ret;
  60 }
  61
  62 /*
  63         Set the extended attributes of a file
  64 */
  65 static int setext2flags (const char *fname, long flags)
  66 {
  67         int ret = -1;
  68         int fd = open (fname,O_RDONLY);
  69         if (fd == -1){
  70                 fprintf (stderr,"Can't open file %s (%s)\n",fname,strerror(errno));
  71         }else{
  72                 ret = ioctl (fd,EXT2_IOC_SETFLAGS,&flags);
  73                 close (fd);
  74                 if (ret == -1){
  75                         fprintf (stderr,"Can't set ext2 flags on file %s (%s)\n"
  76                                 ,fname,strerror(errno));
  77                 }
  78         }
  79         return ret;
  80 }
  81
  82
  83 int main (int argc, char *argv[])
  84 {
  85         int ret = -1;
  86         if (argc <= 1){
  87                 fprintf (stderr
  88                         ,"showattr file ...\n"
  89                          "\n"
  90                          "Presents extended file attribute.\n"
  91                          "\n"
  92                          "setattr --immutable --immulink file ...\n"
  93                          "\n"
  94                          "Sets the extended file attributes.\n"
  95                          "\n"
  96                          "These utilities exist as an interim until lsattr and\n"
  97                          "chattr are updated.\n"
  98                         );
  99         }else if (strstr(argv[0],"showattr")!=NULL){
 100                 int i;
 101                 for (i=1; i<argc; i++){
 102                         long flags;
 103                         ret = getext2flags (argv[i],&flags);
 104                         if (ret == -1){
 105                                 break;
 106                         }else{
 107                                 printf ("%s\t%08lx\n",argv[i],flags);
 108                         }
 109                 }
 110         }else if (strstr(argv[0],"setattr")!=NULL){
 111                 long flags = 0;
 112                 int  i;
 113                 ret = 0;
 114                 for (i=1; i<argc; i++){
 115                         const char *arg = argv[i];
 116                         if (strncmp(arg,"--",2)==0){
 117                                 if (strcmp(arg,"--immutable")==0){
 118                                         flags |= EXT2_IMMUTABLE_FILE_FL;
 119                                 }else if (strcmp(arg,"--immulink")==0){
 120                                         flags |= EXT2_IMMUTABLE_LINK_FL;
 121                                 }else{
 122                                         fprintf (stderr,"Invalid option %s\n",arg);
 123                                         ret = -1;
 124                                         break;
 125                                 }
 126                         }else{
 127                                 ret = setext2flags (arg,flags);
 128                                 if (ret == -1){
 129                                         break;
 130                                 }
 131                         }
 132                 }
 133         }
 134         return ret;
 135 }
 136