BSD 4_3_Net_2 release

[unix-history] / usr / src / lib / libc / stdlib / system.3

diff --git a/usr/src/lib/libc/stdlib/system.3 b/usr/src/lib/libc/stdlib/system.3
index 0aad859..78c927c 100644 (file)
--- a/usr/src/lib/libc/stdlib/system.3
+++ b/usr/src/lib/libc/stdlib/system.3
@@ -1,59 +1,93 @@
-.\" Copyright (c) 1990 The Regents of the University of California.
+.\" Copyright (c) 1990, 1991 The Regents of the University of California.

 .\" All rights reserved.
 .\"
 .\" All rights reserved.
 .\"

-.\" Redistribution and use in source and binary forms are permitted
-.\" provided that: (1) source distributions retain this entire copyright
-.\" notice and comment, and (2) distributions including binaries display
-.\" the following acknowledgement:  ``This product includes software
-.\" developed by the University of California, Berkeley and its contributors''
-.\" in the documentation or other materials provided with the distribution
-.\" and in all advertising materials mentioning features or use of this
-.\" software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
-.\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
-.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+.\" This code is derived from software contributed to Berkeley by
+.\" the American National Standards Committee X3, on Information
+.\" Processing Systems.

 .\"
 .\"

-.\"    @(#)system.3    6.3 (Berkeley) 5/17/90
+.\" 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.

 .\"
 .\"

-.TH SYSTEM 3 "May 17, 1990"
-.AT 3
-.SH NAME
-system \- issue a shell command
-.SH SYNOPSIS
-.nf
-.ft B
-#include <stdlib.h>
-
-system(const char *string);
-.ft R
-.fi
-.SH DESCRIPTION
-.I System
-hands
-.I string
+.\" 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.
+.\"
+.\"     @(#)system.3   6.5 (Berkeley) 6/29/91
+.\"
+.Dd June 29, 1991
+.Dt SYSTEM 3
+.Os
+.Sh NAME
+.Nm system
+.Nd pass a command to the shell
+.Sh SYNOPSIS
+.Fd #include <stdlib.h>
+.Ft int
+.Fn system "const char *string"
+.Sh DESCRIPTION
+The
+.Fn system
+function
+hands the argument
+.Fa string

 to the command interpreter
 to the command interpreter

-.IR sh (1).
-The calling process waits until the shell has completed,
-ignoring SIGINT and SIGQUIT, and blocking SIGCHLD.
-.PP
+.Xr sh 1 .
+The calling process waits for the shell
+to finish executing the command,
+ignoring
+.Dv SIGINT
+and
+.Dv SIGQUIT ,
+and blocking
+.Dv SIGCHLD .
+.Pp

 If
 If

-.I string
-is a NULL pointer,
-.I system
+.Fa string
+is a
+.Dv NULL
+pointer,
+.Fn system

 will return non-zero if the command interpreter
 will return non-zero if the command interpreter

-.IR sh (1)
+.Xr sh 1

 is available, and zero if it is not.
 is available, and zero if it is not.

-.PP
-.I System
+.Pp
+The
+.Fn system
+function

 returns the exit status of the shell, or \-1 if the
 returns the exit status of the shell, or \-1 if the

-.IR wait (3)
+.Xr wait 3

 for the shell failed.
 for the shell failed.

-A return status of 127 indicates that the execution of the shell
+A return value of 127 means the execution of the shell

 failed.
 failed.

-.SH "SEE ALSO"
-sh(1), execve(2), wait(2), popen(3)
-.SH STANDARDS
-.B System
-conforms to ANSI X3.159-1989 (``ANSI C'').
+.Sh SEE ALSO
+.Xr sh 1 ,
+.Xr execve 2 ,
+.Xr wait 2 ,
+.Xr popen 3
+.Sh STANDARDS
+The
+.Fn system
+function
+conforms to
+.St -ansiC .