getuid, geteuid - Gets the real or effective user ID
uid_t getuid( void );
uid_t geteuid( void );
Application developers may want to specify an #include statement for <sys/types.h> before the one for <unistd.h> if programs are being developed for multiple platforms. The additional #include statement is not required on Tru64 UNIX systems or by ISO or X/Open standards, but may be required on other vendors' systems that conform to these standards.
Interfaces documented on this reference page conform to industry standards as follows:
getuid(): POSIX.1, XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
The getuid() function returns the real user ID of the calling process.
The geteuid() function returns the effective user ID of the calling process.
Functions: setuid(2), setruid(3), setreuid(2)
Standards: standards(5) delim off