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Annotation of 43BSDTahoe/man/man5/fstab.5, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1980 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)fstab.5     6.1 (Berkeley) 5/15/85
        !             6: .\"
        !             7: .TH FSTAB 5  "May 15, 1985"
        !             8: .UC 4
        !             9: .SH NAME
        !            10: fstab \- static information about the filesystems
        !            11: .SH SYNOPSIS
        !            12: .B #include <fstab.h>
        !            13: .SH DESCRIPTION
        !            14: The file
        !            15: .I /etc/fstab
        !            16: contains descriptive information about the various file
        !            17: systems.
        !            18: .I /etc/fstab
        !            19: is only
        !            20: .I read
        !            21: by programs, and not written;
        !            22: it is the duty of the system administrator to properly create 
        !            23: and maintain this file.
        !            24: The order of records in
        !            25: .I /etc/fstab
        !            26: is important because
        !            27: .I fsck,
        !            28: .I mount,
        !            29: and
        !            30: .I umount
        !            31: sequentially iterate through
        !            32: .I /etc/fstab
        !            33: doing their thing.
        !            34: .PP
        !            35: The special file name is the 
        !            36: .B block
        !            37: special file name, 
        !            38: and not the character special file name.
        !            39: If a program needs the character special file name,
        !            40: the program must create it by appending a ``r'' after the
        !            41: last ``/'' in the special file name.
        !            42: .PP
        !            43: If
        !            44: .I fs_type
        !            45: is ``rw'' or ``ro'' then the file system whose name is given in the
        !            46: .I fs_file
        !            47: field is normally mounted read-write or read-only on the
        !            48: specified special file.  If
        !            49: .I fs_type
        !            50: is ``rq'', then the file system is normally mounted read-write
        !            51: with disk quotas enabled.
        !            52: The
        !            53: .I fs_freq
        !            54: field is used for these file systems by the
        !            55: .IR dump (8)
        !            56: command to determine which file systems need to be dumped.
        !            57: The
        !            58: .I fs_passno
        !            59: field is used by the
        !            60: .IR fsck (8)
        !            61: program to determine the order in which file system checks are done
        !            62: at reboot time.
        !            63: The root file system should be specified with a
        !            64: .I fs_passno
        !            65: of 1, and other file systems should have larger numbers.  File systems
        !            66: within a drive should have distinct numbers, but file systems on different
        !            67: drives can be checked on the same pass to utilize parallelism available in
        !            68: the hardware.
        !            69: .PP
        !            70: If
        !            71: .I fs_type
        !            72: is ``sw'' then the special file is made available as a piece of swap
        !            73: space by the
        !            74: .IR swapon (8)
        !            75: command at the end of the system reboot procedure.
        !            76: The fields other than
        !            77: .I fs_spec
        !            78: and
        !            79: .I fs_type
        !            80: are not used in this case.
        !            81: .PP
        !            82: If
        !            83: .I fs_type
        !            84: is ``rq'' then at boot time the file system is automatically
        !            85: processed by the
        !            86: .IR quotacheck (8)
        !            87: command and disk quotas are then enabled with
        !            88: .IR quotaon (8).
        !            89: File system quotas are maintained in a file ``quotas'', which is
        !            90: located at the root of the associated file system.
        !            91: .PP
        !            92: If
        !            93: .I fs_type
        !            94: is specified as ``xx'' the entry is ignored.
        !            95: This is useful to show disk partitions which are currently not used.
        !            96: .sp 1
        !            97: .nf
        !            98: .DT
        !            99: #define        FSTAB_RW        "rw"    /* read-write device */
        !           100: #define        FSTAB_RO        "ro"    /* read-only device */
        !           101: #define        FSTAB_RQ        "rq"    /* read-write with quotas */
        !           102: #define        FSTAB_SW        "sw"    /* swap device */
        !           103: #define        FSTAB_XX        "xx"    /* ignore totally */
        !           104: .PP
        !           105: .ta \w'#define 'u +\w'char\ \ 'u +\w'fs_passno; 'u
        !           106: struct fstab {
        !           107:        char    *fs_spec;       /* block special device name */
        !           108:        char    *fs_file;       /* file system path prefix */
        !           109:        char    *fs_type;               /* rw,ro,sw or xx */
        !           110:        int     fs_freq;                /* dump frequency, in days */
        !           111:        int     fs_passno;              /* pass number on parallel dump */
        !           112: };
        !           113: .fi
        !           114: .PP
        !           115: The proper way to read records from
        !           116: .I /etc/fstab
        !           117: is to use the routines getfsent(), getfsspec(), getfstype(),
        !           118: and getfsfile().
        !           119: .SH FILES
        !           120: /etc/fstab
        !           121: .SH SEE ALSO
        !           122: getfsent(3X)

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