NAME

setregid − set real and effective group ID

SYNOPSIS

setregid(rgid, egid)
int rgid, egid;

DESCRIPTION

The real and effective group ID’s of the current process are set to the arguments.  Unprivileged users may change the real group ID to the effective group ID and vice-versa; only the super-user may make other changes. 

Supplying a value of −1 for either the real or effective group ID forces the system to substitute the current ID in place of the −1 parameter. 

RETURN VALUE

Upon successful completion, a value of 0 is returned.  Otherwise, a value of −1 is returned and errno is set to indicate the error. 

ERRORS

[EPERM] The current process is not the super-user and a change other than changing the effective group-id to the real group-id was specified. 

SEE ALSO

getgid(2), setreuid(2), setgid(3)

September 02, 1992