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Annotation of 43BSDReno/lib/libc/sys/_exit.2, revision 1.1.1.1

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: .\"    @(#)exit.2      6.4 (Berkeley) 5/22/86
                      6: .\"
                      7: .TH EXIT 2 "May 22, 1986"
                      8: .UC 4
                      9: .SH NAME
                     10: _exit \- terminate a process
                     11: .SH SYNOPSIS
                     12: .nf
                     13: .ft B
                     14: _exit(status)
                     15: int status;
                     16: .fi
                     17: .SH DESCRIPTION
                     18: .I _exit
                     19: terminates a process with the following consequences:
                     20: .in +5n
                     21: .PP
                     22: All of the descriptors open in the calling process are closed.
                     23: This may entail delays, for example, waiting for output to drain;
                     24: a process in this state may not be killed, as it is already dying.
                     25: .PP
                     26: If the parent process of the calling process is executing a
                     27: .I wait
                     28: or is interested in the SIGCHLD signal,
                     29: then it is notified of the calling process's termination and
                     30: the low-order eight bits of \fIstatus\fP are made available to it;
                     31: see
                     32: .IR wait (2).
                     33: .PP
                     34: The parent process ID of all of the calling process's existing child
                     35: processes are also set to 1.  This means that the initialization process
                     36: (see 
                     37: .IR intro (2))
                     38: inherits each of these processes as well.
                     39: Any stopped children are restarted with a hangup signal (SIGHUP).
                     40: .in -5n
                     41: .PP
                     42: Most C programs call the library routine
                     43: .IR exit (3),
                     44: which performs cleanup actions in the standard I/O library before
                     45: calling \fI_exit\fP\|.
                     46: .SH "RETURN VALUE"
                     47: This call never returns.
                     48: .SH "SEE ALSO"
                     49: fork(2), sigvec(2), wait(2), exit(3)

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