101 lines
3.5 KiB
Perl
101 lines
3.5 KiB
Perl
.\" Copyright (c) 1983, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)1.7.t 8.1 (Berkeley) 6/8/93
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.\"
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.sh "System operation support
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.PP
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Unless noted otherwise,
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the calls in this section are permitted only to a privileged user.
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.NH 3
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Bootstrap operations
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.PP
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The call
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.DS
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mount(blkdev, dir, ronly);
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char *blkdev, *dir; int ronly;
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.DE
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extends the UNIX name space. The \fImount\fP call specifies
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a block device \fIblkdev\fP containing a UNIX file system
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to be made available starting at \fIdir\fP. If \fIronly\fP is
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set then the file system is read-only; writes to the file system
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will not be permitted and access times will not be updated
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when files are referenced.
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\fIDir\fP is normally a name in the root directory.
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.PP
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The call
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.DS
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swapon(blkdev, size);
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char *blkdev; int size;
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.DE
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specifies a device to be made available for paging and swapping.
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.PP
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.NH 3
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Shutdown operations
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.PP
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The call
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.DS
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unmount(dir);
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char *dir;
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.DE
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unmounts the file system mounted on \fIdir\fP.
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This call will succeed only if the file system is
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not currently being used.
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.PP
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The call
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.DS
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sync();
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.DE
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schedules input/output to clean all system buffer caches.
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(This call does not require privileged status.)
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.PP
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The call
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.DS
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reboot(how)
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int how;
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.DE
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causes a machine halt or reboot. The call may request a reboot
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by specifying \fIhow\fP as RB_AUTOBOOT, or that the machine be halted
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with RB_HALT. These constants are defined in \fI<sys/reboot.h>\fP.
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.NH 3
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Accounting
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.PP
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The system optionally keeps an accounting record in a file
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for each process that exits on the system.
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The format of this record is beyond the scope of this document.
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The accounting may be enabled to a file \fIname\fP by doing
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.DS
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acct(path);
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char *path;
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.DE
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If \fIpath\fP is null, then accounting is disabled. Otherwise,
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the named file becomes the accounting file.
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