SETPGID(2) OpenBSD Programmer's Manual SETPGID(2)NAME
setpgid, setpgrp - set process group
SYNOPSIS
#include <unistd.h>
int
setpgid(pid_t pid, pid_t pgrp);
int
setpgrp(pid_t pid, pid_t pgrp);
DESCRIPTIONsetpgid() sets the process group of the specified process pid to the
specified pgrp. If pid is zero, then the call applies to the current
process. If pgrp is zero, the process ID of the specified process is
used.
If the invoker is not the superuser, then the affected process must have
the same effective user ID as the invoker or be a descendant of the
invoking process.
RETURN VALUESsetpgid() returns 0 when the operation was successful. If the request
failed, -1 is returned and the global variable errno indicates the
reason.
ERRORSsetpgid() will fail and the process group will not be altered if:
[EACCES] The value of the pid argument matches the process ID of a
child process of the calling process, and the child process
has successfully executed one of the exec functions.
[EINVAL] The value of the pgrp argument is less than zero.
[EPERM] The effective user ID of the requested process is different
from that of the caller and the process is not a descendant
of the calling process.
[ESRCH] The value of the pid argument does not match the process ID
of the calling process or of a child process of the calling
process.
SEE ALSOgetpgrp(2)STANDARDSsetpgrp() is identical to setpgid(), and is retained for calling
convention compatibility with historical versions of BSD.
The setpgid() function conforms to IEEE Std 1003.1-1988 (``POSIX'').
OpenBSD 4.9 May 31, 2007 OpenBSD 4.9
