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    Command:

    geteuid

    
    
    

    SYNOPSIS

           #include <unistd.h>
           #include <sys/types.h>
    
           uid_t getuid(void);
           uid_t geteuid(void);
    
    
    

    DESCRIPTION

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

    ERRORS

           These functions are always successful.
    
    
    

    CONFORMING TO

           POSIX.1-2001, 4.3BSD.
    
    
    

    NOTES

       History
           In  UNIX  V6  the  getuid()  call  returned (euid << 8) + uid.  UNIX V7
           introduced separate calls getuid() and geteuid().
    
           The original Linux getuid() and geteuid() system calls  supported  only
           16-bit   user  IDs.   Subsequently,  Linux  2.4  added  getuid32()  and
           geteuid32(), supporting 32-bit IDs.  The glibc getuid()  and  geteuid()
           wrapper  functions transparently deal with the variations across kernel
           versions.
    
    
    

    SEE ALSO

           getresuid(2), setreuid(2), setuid(2), credentials(7)
    
    
    

    Linux 2010-11-22 GETUID(2)

    
    
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