Unknown | 100 lines | 100 code | 0 blank | 0 comment | 0 complexity | 3f8533fb5c991399491012c73136a040 MD5 | raw file
1.\" Copyright (c) 1983, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)1.7.t 8.1 (Berkeley) 6/8/93 33.\" 34.sh "System operation support 35.PP 36Unless noted otherwise, 37the calls in this section are permitted only to a privileged user. 38.NH 3 39Bootstrap operations 40.PP 41The call 42.DS 43mount(blkdev, dir, ronly); 44char *blkdev, *dir; int ronly; 45.DE 46extends the UNIX name space. The \fImount\fP call specifies 47a block device \fIblkdev\fP containing a UNIX file system 48to be made available starting at \fIdir\fP. If \fIronly\fP is 49set then the file system is read-only; writes to the file system 50will not be permitted and access times will not be updated 51when files are referenced. 52\fIDir\fP is normally a name in the root directory. 53.PP 54The call 55.DS 56swapon(blkdev, size); 57char *blkdev; int size; 58.DE 59specifies a device to be made available for paging and swapping. 60.PP 61.NH 3 62Shutdown operations 63.PP 64The call 65.DS 66unmount(dir); 67char *dir; 68.DE 69unmounts the file system mounted on \fIdir\fP. 70This call will succeed only if the file system is 71not currently being used. 72.PP 73The call 74.DS 75sync(); 76.DE 77schedules input/output to clean all system buffer caches. 78(This call does not require privileged status.) 79.PP 80The call 81.DS 82reboot(how) 83int how; 84.DE 85causes a machine halt or reboot. The call may request a reboot 86by specifying \fIhow\fP as RB_AUTOBOOT, or that the machine be halted 87with RB_HALT. These constants are defined in \fI<sys/reboot.h>\fP. 88.NH 3 89Accounting 90.PP 91The system optionally keeps an accounting record in a file 92for each process that exits on the system. 93The format of this record is beyond the scope of this document. 94The accounting may be enabled to a file \fIname\fP by doing 95.DS 96acct(path); 97char *path; 98.DE 99If \fIpath\fP is null, then accounting is disabled. Otherwise, 100the named file becomes the accounting file.