SETUID(3)                            BSD                             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
     setuid (setgid) sets both the real and effective user ID (group ID) of
     the current process to as specified.

     seteuid (setegid) sets the effective user ID (group ID) of the current
     process.

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

     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 otherwise.