projects / unix-history / blame
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|---|---|---|
| 5623bdc2 KM |
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 | .\" | |
| 65001f7a | 5 | .\" @(#)_exit.2 6.1 (Berkeley) %G% |
| 5623bdc2 | 6 | .\" |
| 65001f7a | 7 | .TH EXIT 2 "" |
| 5623bdc2 KM |
8 | .UC 4 |
| 9 | .SH NAME | |
| 69ee3f0e | 10 | _exit \- terminate a process |
| 5623bdc2 KM |
11 | .SH SYNOPSIS |
| 12 | .nf | |
| 69ee3f0e KM |
13 | .ft B |
| 14 | _exit(status) | |
| 15 | int status; | |
| 5623bdc2 KM |
16 | .fi |
| 17 | .SH DESCRIPTION | |
| 69ee3f0e KM |
18 | .I _exit |
| 19 | terminates a process with the following consequences: | |
| 20 | .in +5n | |
| 5623bdc2 | 21 | .PP |
| 69ee3f0e | 22 | All of the descriptors open in the calling process are closed. |
| 5623bdc2 | 23 | .PP |
| 69ee3f0e KM |
24 | If the parent process of the calling process is executing a |
| 25 | .I wait | |
| 26 | or is interested in the SIGCHLD signal, | |
| 27 | then it is notified of the calling process's termination and | |
| 28 | the low-order eight bits of \fIstatus\fP are made available to it; | |
| 29 | see | |
| 30 | .IR wait (2). | |
| 31 | .PP | |
| 32 | The parent process ID of all of the calling process's existing child | |
| 33 | processes are also set to 1. This means that the initialization process | |
| 34 | (see | |
| 35 | .IR intro (2)) | |
| 36 | inherits each of these processes as well. | |
| 37 | .in -5n | |
| 38 | .PP | |
| 39 | Most C programs call the library routine | |
| 40 | .IR exit (3) | |
| 41 | which performs cleanup actions in the standard i/o library before | |
| 42 | calling \fI_exit\fP\|. | |
| 43 | .SH "RETURN VALUE" | |
| 44 | This call never returns. | |
| 5623bdc2 | 45 | .SH "SEE ALSO" |
| 69ee3f0e | 46 | fork(2), wait(2), exit(3) |