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Diffstat (limited to 'lib/libc/sys/getpgrp.2')
| -rw-r--r-- | lib/libc/sys/getpgrp.2 | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/lib/libc/sys/getpgrp.2 b/lib/libc/sys/getpgrp.2 deleted file mode 100644 index db6132324ee2..000000000000 --- a/lib/libc/sys/getpgrp.2 +++ /dev/null @@ -1,142 +0,0 @@ -.\" Copyright (c) 1983, 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. -.\" 3. 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. -.\" -.\" @(#)getpgrp.2 8.1 (Berkeley) 6/4/93 -.\" $FreeBSD$ -.\" -.Dd June 4, 1993 -.Dt GETPGRP 2 -.Os -.Sh NAME -.Nm getpgrp -.Nd get process group -.Sh LIBRARY -.Lb libc -.Sh SYNOPSIS -.In unistd.h -.Ft pid_t -.Fn getpgrp void -.Ft pid_t -.Fn getpgid "pid_t pid" -.Sh DESCRIPTION -The process group of the current process is returned by -.Fn getpgrp . -The process group of the process identified by -.Fa pid -is returned by -.Fn getpgid . -If -.Fa pid -is zero, -.Fn getpgid -returns the process group of the current process. -.Pp -Process groups are used for distribution of signals, and -by terminals to arbitrate requests for their input: processes -that have the same process group as the terminal are foreground -and may read, while others will block with a signal if they attempt -to read. -.Pp -This system call is thus used by programs such as -.Xr csh 1 -to create -process groups -in implementing job control. -The -.Fn tcgetpgrp -and -.Fn tcsetpgrp -calls -are used to get/set the process group of the control terminal. -.Sh RETURN VALUES -The -.Fn getpgrp -system call always succeeds. -Upon successful completion, the -.Fn getpgid -system call returns the process group of the specified process; -otherwise, it returns a value of \-1 and sets -.Va errno -to indicate the error. -.Sh COMPATIBILITY -This version of -.Fn getpgrp -differs from past Berkeley versions by not taking a -.Fa "pid_t pid" -argument. -This incompatibility is required by -.St -p1003.1-90 . -.Pp -From the -.St -p1003.1-90 -Rationale: -.Pp -.Bx 4.3 -provides a -.Fn getpgrp -system call that returns the process group ID for a specified process. -Although this function is used to support job control, all known -job-control shells always specify the calling process with this -function. -Thus, the simpler -.At V -.Fn getpgrp -suffices, and the added complexity of the -.Bx 4.3 -.Fn getpgrp -has been omitted from POSIX.1. -The old functionality is available from the -.Fn getpgid -system call. -.Sh ERRORS -The -.Fn getpgid -system call -will succeed unless: -.Bl -tag -width Er -.It Bq Er ESRCH -there is no process whose process ID equals -.Fa pid -.El -.Sh SEE ALSO -.Xr getsid 2 , -.Xr setpgid 2 , -.Xr termios 4 -.Sh STANDARDS -The -.Fn getpgrp -system call is expected to conform to -.St -p1003.1-90 . -.Sh HISTORY -The -.Fn getpgrp -system call appeared in -.Bx 4.0 . -The -.Fn getpgid -system call is derived from its usage in -.At V.4 . |