projects / unix-history / blame
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1 | .\" Copyright (c) 1980 The Regents of the University of California. |
| 2 | .\" All rights reserved. | |
| 7b826f9e | 3 | .\" |
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4 | .\" Redistribution and use in source and binary forms are permitted |
| 5 | .\" provided that the above copyright notice and this paragraph are | |
| 6 | .\" duplicated in all such forms and that any documentation, | |
| 7 | .\" advertising materials, and other materials related to such | |
| 8 | .\" distribution and use acknowledge that the software was developed | |
| 9 | .\" by the University of California, Berkeley. The name of the | |
| 10 | .\" University may not be used to endorse or promote products derived | |
| 11 | .\" from this software without specific prior written permission. | |
| 12 | .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 13 | .\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 14 | .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 15 | .\" | |
| 16 | .\" @(#)reboot.2 6.2 (Berkeley) %G% | |
| 7b826f9e | 17 | .\" |
| ab9465ad | 18 | .TH REBOOT 2 "" |
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19 | .UC 4 |
| 20 | .SH NAME | |
| 21 | reboot \- reboot system or halt processor | |
| 22 | .SH SYNOPSIS | |
| 23 | .nf | |
| 24 | .B #include <sys/reboot.h> | |
| 25 | .PP | |
| 26 | .B reboot(howto) | |
| 27 | .B int howto; | |
| 28 | .fi | |
| 29 | .SH DESCRIPTION | |
| 30 | .I Reboot | |
| 72252431 | 31 | reboots the system, and is invoked automatically |
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32 | in the event of unrecoverable system failures. |
| 33 | .I Howto | |
| 34 | is a mask of options passed to the bootstrap program. | |
| 35 | The system call interface permits only RB_HALT or RB_AUTOBOOT | |
| 36 | to be passed to the reboot program; the other flags | |
| 37 | are used in scripts stored on the console storage media, or used | |
| 38 | in manual bootstrap procedures. | |
| 39 | When none of these options (e.g. RB_AUTOBOOT) is given, the system is rebooted | |
| 40 | from file \*(lqvmunix\*(rq in the root file system of unit 0 | |
| 72252431 | 41 | of a disk chosen in a processor specific way. |
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42 | An automatic consistency check of the disks is then normally performed. |
| 43 | .PP | |
| 44 | The bits of | |
| 45 | .I howto | |
| 46 | are: | |
| 47 | .TP | |
| 48 | RB_HALT | |
| 49 | the processor is simply halted; no reboot takes place. | |
| 72252431 | 50 | RB_HALT should be used with caution. |
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51 | .TP |
| 52 | RB_ASKNAME | |
| 53 | Interpreted by the bootstrap program itself, causing it to | |
| 54 | inquire as to what file should be booted. Normally, the system is | |
| 72252431 | 55 | booted from the file \*(lqxx(0,0)vmunix\*(rq without asking. |
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56 | .TP |
| 57 | RB_SINGLE | |
| 58 | Normally, the reboot procedure involves an automatic disk consistency | |
| 72252431 | 59 | check and then multi-user operations. RB_SINGLE prevents the consistency |
| 7b826f9e | 60 | check, rather simply booting the system with a single-user shell on |
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61 | the console. |
| 62 | RB_SINGLE is interpreted by the | |
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63 | .IR init (8) |
| 64 | program in the newly booted system. | |
| 65 | This switch is not available from the system call interface. | |
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66 | .PP |
| 67 | Only the super-user may | |
| 68 | .I reboot | |
| 69 | a machine. | |
| 70 | .SH "RETURN VALUES" | |
| 71 | If successful, this call never returns. Otherwise, a \-1 | |
| 72 | is returned and an error is returned in the global variable | |
| 73 | .IR errno . | |
| 74 | .SH ERRORS | |
| 75 | .TP 15 | |
| 76 | [EPERM] | |
| 77 | The caller is not the super-user. | |
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78 | .SH "SEE ALSO" |
| 79 | crash(8), halt(8), init(8), reboot(8) | |
| 80 | .SH BUGS | |
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81 | The notion of ``console medium'', among other things, |
| 82 | is specific to the VAX. |