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@(#)setpgid.2 8.1 (Berkeley) 6/4/93
$FreeBSD: head/lib/libc/sys/setpgid.2 50476 1999-08-28 00:22:10Z peter $
.Dd June 4, 1993 .Dt SETPGID 2 .Os BSD 4 .Sh NAME .Nm setpgid , .Nm setpgrp .Nd set process group .Sh SYNOPSIS .Fd #include <unistd.h> .Ft int .Fn setpgid "pid_t pid" "pid_t pgrp" .Ft int .Fn setpgrp "pid_t pid" "pid_t pgrp" .Sh DESCRIPTION .Fn Setpgid sets the process group of the specified process .Ar pid to the specified .Ar pgrp . If .Ar pid is zero, then the call applies to the current process.
p If the invoker is not the super-user, then the affected process must have the same effective user-id as the invoker or be a descendant of the invoking process. .Sh RETURN VALUES .Fn Setpgid returns 0 when the operation was successful. If the request failed, -1 is returned and the global variable .Va errno indicates the reason. .Sh ERRORS .Fn Setpgid will fail and the process group will not be altered if: l -tag -width indent t Bq Er ESRCH The requested process does not exist. t Bq Er EPERM The effective user ID of the requested process is different from that of the caller and the process is not a descendent of the calling process. .El .Sh SEE ALSO .Xr getpgrp 2 .Sh STANDARDS The .Fn setpgid function call is expected to conform to .St -p1003.1-90 . .Sh COMPATIBILITY .Fn Setpgrp is identical to .Fn setpgid , and is retained for calling convention compatibility with historical versions of x .