exit.2

UNIX v6源代码 这几乎是最经典的unix版本 unix操作系统设计和莱昂氏unix源代码分析都是用的该版

.th EXIT II 8/5/73
.sh NAME
exit \*- terminate process
.s3
.sh SYNOPSIS
(exit = 1.)
.br
(status in r0)
.br
.ft B
sys exit
.s3
exit(status)
.br
int status;
.ft R
.sh DESCRIPTION
.it Exit
is the normal means of terminating a process.
.it Exit
closes all the process's files and notifies the parent process
if it is executing a
.it wait.
The low byte of r0
(resp. the argument to
\fIexit\fR)
is available as status to the parent process.
.s3
This call can never return.
.sh "SEE ALSO"
wait (II)
.sh DIAGNOSTICS
None.