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Diffstat (limited to 'lib/libc/sys/getpid.2')
-rw-r--r-- | lib/libc/sys/getpid.2 | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/lib/libc/sys/getpid.2 b/lib/libc/sys/getpid.2 new file mode 100644 index 0000000..aefa770 --- /dev/null +++ b/lib/libc/sys/getpid.2 @@ -0,0 +1,91 @@ +.\" Copyright (c) 1980, 1991, 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. +.\" 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. +.\" +.\" @(#)getpid.2 8.1 (Berkeley) 6/4/93 +.\" $FreeBSD$ +.\" +.Dd November 2, 2006 +.Dt GETPID 2 +.Os +.Sh NAME +.Nm getpid , +.Nm getppid +.Nd get parent or calling process identification +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In sys/types.h +.In unistd.h +.Ft pid_t +.Fn getpid void +.Ft pid_t +.Fn getppid void +.Sh DESCRIPTION +The +.Fn getpid +system call +returns +the process ID of +the calling process. +Though the ID is guaranteed to be unique, it should +.Em NOT +be used for constructing temporary file names, for +security reasons; see +.Xr mkstemp 3 +instead. +.Pp +The +.Fn getppid +system call +returns the process ID of the parent +of the calling process. +.Sh ERRORS +The +.Fn getpid +and +.Fn getppid +system calls are always successful, and no return value is reserved to +indicate an error. +.Sh SEE ALSO +.Xr fork 2 , +.Xr getpgrp 2 , +.Xr kill 2 , +.Xr setpgid 2 , +.Xr setsid 2 , +.Xr exec 3 +.Sh STANDARDS +The +.Fn getpid +and +.Fn getppid +system calls are expected to conform to +.St -p1003.1-90 . +.Sh HISTORY +The +.Fn getpid +function appeared in +.At v7 . |