NAME    [Toc]    [Back]

     getuid, geteuid - get user identification

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

SYNOPSIS    [Toc]    [Back]

     #include <unistd.h>

     uid_t
     getuid(void);

     uid_t
     geteuid(void);

DESCRIPTION    [Toc]    [Back]

     The getuid() function returns the real user ID of the calling process.
     The geteuid() function returns the effective user ID of the calling process.


     The real user ID is that of the user who has invoked the program.  As the
     effective user ID gives the process additional permissions during execution
 of ``set-user-ID'' mode processes, getuid() is used to determine the
     real-user-id of the calling process.

ERRORS    [Toc]    [Back]

     The getuid() and geteuid() functions are always successful, and no return
     value is reserved to indicate an error.

SEE ALSO    [Toc]    [Back]

     getgid(2), setreuid(2)

STANDARDS    [Toc]    [Back]

     The geteuid() and getuid() functions conform to ISO/IEC 9945-1:1990
     (``POSIX.1'').

BSD                              June 4, 1993                              BSD