compiler/clib/getfsstat.c

   1 /*
   2     Copyright © 2004, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/debug.h>
   7
   8 #include <string.h>
   9 #include <errno.h>
  10 #include <sys/mount.h>
  11 #include <proto/dos.h>
  12 #include <dos/dos.h>
  13 #include <proto/exec.h>
  14 #include "__errno.h"
  15 #include "__upath.h"
  16
  17 short getnixfilesystemtype(LONG id_DiskType)
  18 {
  19     switch(id_DiskType)
  20     {
  21         case ID_DOS_DISK:
  22         case ID_FASTDIR_DOS_DISK:
  23             return MOUNT_ADOS_OFS;
  24         case ID_INTER_DOS_DISK:
  25             return MOUNT_ADOS_IOFS;
  26         case ID_FFS_DISK:
  27         case ID_FASTDIR_FFS_DISK:
  28             return MOUNT_ADOS_FFS;
  29         case ID_INTER_FFS_DISK:
  30             return MOUNT_ADOS_IFFS;
  31         default:
  32             return MOUNT_NONE;
  33     }
  34 }
  35
  36 /*****************************************************************************
  37
  38     NAME */
  39 #include <sys/mount.h>
  40
  41     int getfsstat(
  42
  43 /*  SYNOPSIS */
  44     struct statfs *buf,
  45     long bufsize,
  46     int flags)
  47
  48 /*  FUNCTION
  49         Gets information about mounted filesystems.
  50
  51     INPUTS
  52         buf - pointer to statfs structures where information about filesystems
  53             will be stored or NULL
  54         bufsize - size of buf in bytes
  55         flags - not used
  56
  57     RESULT
  58         If buf is NULL number of mounted filesystems is returned. If buf is
  59         not null, information about mounted filesystems is stored in statfs
  60         structures up to bufsize bytes
  61
  62     NOTES
  63
  64     EXAMPLE
  65
  66     BUGS
  67         f_flags, f_files, f_ffree and f_fsid.val are always set to 0
  68         f_mntfromname is set to an empty string
  69
  70     SEE ALSO
  71
  72     INTERNALS
  73
  74 ******************************************************************************/
  75 {
  76     STRPTR name;
  77     BPTR lock;
  78     struct DosList *dlist;
  79     struct InfoData data;
  80     int fscount = 0; /* number of filesystems */
  81     LONG ioerr = 0;
  82
  83     dlist = LockDosList(LDF_READ | LDF_VOLUMES);
  84     while ((dlist = NextDosEntry(dlist, LDF_VOLUMES)) != NULL)
  85     {
  86         if(IsFileSystem(dlist->dol_Name) == FALSE)
  87                 continue;
  88         fscount++;
  89
  90         /* If buf is NULL just count filesystems */
  91         if(buf == NULL)
  92             continue;
  93
  94         /* See if another structure can be stored */
  95         bufsize -= sizeof(struct statfs);
  96         if(bufsize < 0)
  97         {
  98             fscount--;
  99             break;
 100         }
 101
 102         /* Create a volume name */
 103         if(!(name = (STRPTR) AllocVec(strlen(dlist->dol_Name) + 2,
 104             MEMF_CLEAR | MEMF_ANY)))
 105         {
 106             ioerr = ERROR_NO_FREE_STORE;
 107             break;
 108         }
 109
 110         strcpy(name, dlist->dol_Name);
 111         strcat(name, ":");
 112
 113         /* Get filesystem data from lock */
 114         if((lock = Lock(name, SHARED_LOCK)))
 115         {
 116             if(Info(lock, &data))
 117             {
 118                 /* Fill statfs structure */
 119                 buf[fscount - 1].f_type = getnixfilesystemtype(
 120                     data.id_DiskType);
 121                 buf[fscount - 1].f_flags = 0;
 122                 buf[fscount - 1].f_fsize = data.id_BytesPerBlock;
 123                 buf[fscount - 1].f_bsize = data.id_BytesPerBlock;
 124                 buf[fscount - 1].f_blocks = data.id_NumBlocks;
 125                 buf[fscount - 1].f_bfree = data.id_NumBlocks -
 126                     data.id_NumBlocksUsed;
 127                 buf[fscount - 1].f_bavail = data.id_NumBlocks -
 128                     data.id_NumBlocksUsed;
 129                 buf[fscount - 1].f_files = 0;
 130                 buf[fscount - 1].f_ffree = 0;
 131                 buf[fscount - 1].f_fsid.val[0] = 0;
 132                 buf[fscount - 1].f_fsid.val[1] = 0;
 133                 strncpy(buf[fscount - 1].f_mntonname, __path_a2u(name),
 134                     MNAMELEN);
 135                 buf[fscount - 1].f_mntfromname[0] = '\0';
 136             }
 137             else
 138             {
 139                 ioerr = IoErr();
 140             }
 141             UnLock(lock);
 142         }
 143         else
 144         {
 145             ioerr = IoErr();
 146         }
 147         FreeVec(name);
 148         if(ioerr)
 149             break;
 150     }
 151     UnLockDosList(LDF_READ | LDF_VOLUMES);
 152
 153     if(ioerr) {
 154         errno = IoErr2errno(ioerr);
 155         return -1;
 156     }
 157     return fscount;
 158 }