SYNOPSIS

     #include <unistd.h>

     int
     setruid(uid_t ruid);

     int
     setrgid(gid_t rgid);

DESCRIPTION

     The setruid() function (setrgid()) sets the real user ID (group ID) of
     the current process.

RETURN VALUES

     Upon successful completion, the value 0 is returned; otherwise the
     value -1 is returned and the global variable errno is set to indicate the
     error.

ERRORS

     The functions fail if:

     [EPERM]            The user is not the super user and the ID specified is
                        not the real or effective ID.

COMPATIBILITY

     The use of these calls is not portable.  Their use is discouraged; they
     will be removed in the future.

SEE ALSO

     getgid(2), getuid(2), setegid(2), seteuid(2), setgid(2), setuid(2)

HISTORY

     The setruid() and setrgid() syscalls appeared in 4.2BSD and were dropped
     in 4.4BSD.

BSD                              June 2, 1993                              BSD