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author | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 05:00:24 +0000 |
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committer | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 05:00:24 +0000 |
commit | be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da (patch) | |
tree | a18a706dffa5baf86a3b12bbfb4f81caa097f349 /lib/libc/sys/_exit.2 | |
parent | 2a27bd86e6002c871e3b5561a5334653bb222a77 (diff) | |
download | FreeBSD-src-be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da.zip FreeBSD-src-be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da.tar.gz |
BSD 4.4 Lite Lib Sources
Diffstat (limited to 'lib/libc/sys/_exit.2')
-rw-r--r-- | lib/libc/sys/_exit.2 | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/lib/libc/sys/_exit.2 b/lib/libc/sys/_exit.2 new file mode 100644 index 0000000..73e6062 --- /dev/null +++ b/lib/libc/sys/_exit.2 @@ -0,0 +1,112 @@ +.\" Copyright (c) 1980, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)_exit.2 8.1 (Berkeley) 6/4/93 +.\" +.Dd June 4, 1993 +.Dt EXIT 2 +.Os BSD 4 +.Sh NAME +.Nm _exit +.Nd terminate the calling process +.Sh SYNOPSIS +.Fd #include <unistd.h> +.Ft void +.Fn _exit "int status" +.Sh DESCRIPTION +The +.Fn _exit +function +terminates a process with the following consequences: +.Bl -bullet +.It +All of the descriptors open in the calling process are closed. +This may entail delays, for example, waiting for output to drain; +a process in this state may not be killed, as it is already dying. +.It +If the parent process of the calling process has an outstanding +.Xr wait +call +or catches the +.Dv SIGCHLD +signal, +it is notified of the calling process's termination and +the +.Em status +is set as defined by +.Xr wait 2 . +.It +The parent process-ID of all of the calling process's existing child +processes are set to 1; the initialization process +(see the DEFINITIONS section of +.Xr intro 2 ) +inherits each of these processes. +.It +If the termination of the process causes any process group +to become orphaned (usually because the parents of all members +of the group have now exited; see +.Dq orphaned process group +in +.Xr intro 2 ) , +and if any member of the orphaned group is stopped, +the +.Dv SIGHUP +signal and the +.Dv SIGCONT +signal are sent to all members of the newly-orphaned process group. +.It +If the process is a controlling process (see +.Xr intro 2 ) , +the +.Dv SIGHUP +signal is sent to the foreground process group of the controlling terminal, +and all current access to the controlling terminal is revoked. +.El +.Pp +Most C programs call the library routine +.Xr exit 3 , +which flushes buffers, closes streams, unlinks temporary files, etc., +before +calling +.Fn _exit . +.Sh RETURN VALUE +.Fn _exit +can never return. +.Sh SEE ALSO +.Xr fork 2 , +.Xr sigvec 2 , +.Xr wait 2 , +.Xr exit 3 +.Sh STANDARDS +The +.Nm _exit +function is defined by +.St -p1003.1-88 . |