geteuid(2) [ultrix man page]

getuid(2)							System Calls Manual							 getuid(2)

Name
       getuid, geteuid - get user identity

Syntax
       #include <sys/types.h>
       #include <unistd.h>

       uid = getuid()
       uid_t uid;

       euid = geteuid()
       uid_t euid;

Description
       The system call returns the real user ID of the current process, the effective user ID.

       The  real  user ID identifies the person who is logged in.  The effective user ID gives the process additional permissions during execution
       of "set-user-ID" mode processes, which use to determine the real-user-id of the process which invoked them.

Environment
   System Five
       Differs from the System V definition in that the return values are of type int, instead of unsigned short.

   POSIX
       When your program is compiled in POSIX mode, the and functions return a value of type uid_t.  The and functions	return	a  value  of  type
       gid_t.

See Also
       getgid(2), setreuid(2)

																	 getuid(2)

getuid(2)							   System Calls 							 getuid(2)

NAME

       getuid, geteuid, getgid, getegid - get real user, effective user, real group, and effective group IDs

SYNOPSIS

       #include <sys/types.h>
       #include <unistd.h>

       uid_t getuid(void);

       uid_t geteuid(void);

       gid_t getgid(void);

       gid_t getegid(void);

DESCRIPTION

       The getuid() function returns the real user ID of the calling process. The real user ID identifies the person who is logged in.

       The  geteuid()  function  returns the effective user ID of the calling process. The effective user ID gives the process various permissions
       during execution of "set-user-ID" mode processes which use  getuid() to determine the real user ID of the process that invoked them.

       The getgid() function returns the real group ID of the calling process.

       The getegid() function returns the effective group ID of the calling process.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Async-Signal-Safe 	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       Intro(2), setuid(2), attributes(5), standards(5)

SunOS 5.11							    28 Dec 1996 							 getuid(2)