FSTAB(5)                COMMAND REFERENCE                FSTAB(5)



NAME
     fstab - static information about the filesystems

SYNOPSIS
     #include <fstab.h>

DESCRIPTION
     The file /etc/fstab contains descriptive information about
     the various file systems.  /etc/fstab is only read by
     programs, and not written; it is the duty of the system
     administrator to properly create and maintain this file.
     The order of records in /etc/fstab is important because
     fsck, mount, and umount sequentially iterate through
     /etc/fstab while executing.

     The fstab structure is defined in fstab.h as:

     struct fstab {
             char  *fs_spec;  /* block special device name */
             char  *fs_file;  /* file system path prefix */
             char  *fs_type;  /* rw,ro,sw or xx */
             int   fs_freq;   /* dump frequency, in days */
             int   fs_passno; /* pass number on parallel dump */
     };

     The special file name is the block special file name, and
     not the character special file name.  If a program needs the
     character special file name, the program must create it by
     appending a ``r'' after the last ``/'' in the special file
     name.

     Fs_type may be one of the following, from fstab.h:

     #define   FSTAB_RW  "rw" /* read-write device */
     #define   FSTAB_RO  "ro" /* read-only device */
     #define   FSTAB_RQ  "rq" /* read-write with quotas */
     #define   FSTAB_SW  "sw" /* swap device */
     #define   FSTAB_XX  "xx" /* ignore totally */

     If fs_type is ``rw'' or ``ro'' then the file system whose
     name is given in the fs_file field is normally mounted
     read-write or read-only on the specified special file.  If
     fs_type is ``rq'', then the file system is normally mounted
     read-write with disk quotas enabled.  The fs_freq field is
     used for these file systems by the dump(8) command to
     determine which file systems need to be dumped.  The
     fs_passno field is used by the fsck(8) program to determine
     the order in which file system checks are done at reboot
     time.  The root file system should be specified with a
     fs_passno of 1, and other file systems should have larger
     numbers.  File systems within a drive should have distinct
     numbers, but file systems on different drives can be checked



Printed 10/17/86                                                1

FSTAB(5)                COMMAND REFERENCE                FSTAB(5)



     on the same pass to utilize parallelism available in the
     hardware.

     If fs_type is ``sw'' then the special file is made available
     as a piece of swap space by the swapon(8) command at the end
     of the system reboot procedure.  The fields other than
     fs_spec and fs_type are not used in this case.

     If fs_type is ``rq'' then at boot time the file system is
     automatically processed by the quotacheck(8) command and
     disk quotas are then enabled with quotaon(8).  File system
     quotas are maintained in a file ``quotas'', which is located
     at the root of the associated file system.

     If fs_type is specified as ``xx'' the entry is ignored.
     This is useful to show disk partitions which are currently
     not used.

     The proper way to read records from /etc/fstab is to use the
     routines getfsent, getfsspec, getfstype, and getfsfile.

FILES
     /etc/fstab

SEE ALSO
     getfsent(3c).





























Printed 10/17/86                                                2

%%index%%
na:72,84;
sy:156,184;
de:340,2601;3085,1100;
fi:4185,69;
se:4254,116;
%%index%%000000000103