NAME
setpgrp — set process group ID
SYNOPSIS
#include <unistd.h>
pid_t setpgrp(void);
DESCRIPTION
If the calling process is not already a session
leader,
setpgrp()
sets the process group ID of the calling process to the process ID
of the calling process.
If
setpgrp()
creates a new session, then the new session has no controlling terminal.
The
setpgrp()
function has no effect when the calling process is a session leader.
Security Restrictions
Some or all of the actions associated with this system call may require
privileges.
See
privileges(5)
for more information.
RETURN VALUE
Upon successful completion,
setpgrp()
returns the new process group ID.
ERRORS
If
setpgrp()
fails, no changes occur and
errno
(see
errno(2))
is set to one of the following values:
- EPERM
The calling process is already a process group leader or
the process group ID of a process other than the calling
process matches the process ID of the calling process.
- EPERM
The calling process does not have sufficient privileges.
STANDARDS CONFORMANCE
setpgrp(): SVID2, SVID3, XPG2, XPG3, XPG4, XPG4.2
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