SETUID(3)                                                            SETUID(3)



NAME
       setuid, seteuid, setruid, setgid, setegid, setrgid - set user and group
       ID

SYNOPSIS
       #include <sys/types.h>

       setuid(uid)
       seteuid(euid)
       setruid(ruid)
       uid_t uid, euid, ruid;

       setgid(gid)
       setegid(egid)
       setrgid(rgid)
       gid_t gid, egid, rgid;

DESCRIPTION
       _S_e_t_u_i_d (_s_e_t_g_i_d) sets both the real and effective user ID (group ID)  of
       the current process to as specified.

       _S_e_t_e_u_i_d  (_s_e_t_e_g_i_d) sets the effective user ID (group ID) of the current
       process.

       _S_e_t_r_u_i_d (_s_e_t_r_g_i_d) sets the real user ID (group ID) of the current  pro‐
       cess.

       These  calls are only permitted to the super-user or if the argument is
       the real or effective ID.

SEE ALSO
       setreuid(2), setregid(2), getuid(2), getgid(2)

DIAGNOSTICS
       Zero is returned if the user (group) ID is set; -1 is  returned  other‐
       wise.



4.2 Berkeley Distribution        May 12, 1986                        SETUID(3)