NAME

getuid, geteuid − Get the real or effective user ID

SYNOPSIS

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

[Tru64 UNIX]   Application developers may want to specify an #include statement for <sys/types.h> before the one for <unistd.h> if programs are being develped for multiple platforms. The additional #include statement is not required on Tru64 UNIX systems or by ISO or Open Group standards, but may be required on other vendors’ systems that conform to these standards. 

STANDARDS

Interfaces documented on this reference page conform to industry standards as follows:

getuid(), geteuid():  POSIX.1, XSH4.0, XSH4.2, XSH5.0

Refer to standards(5) for more information about industry standards and associated tags. 

DESCRIPTION

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

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

RETURN VALUES

These functions are always successful, and no return value is reserved to indicate an error. 

SEE ALSO

Functions: setreuid(2), setruid(3), setuid(2)

Standards: standards(5)