getuid, geteuid - Get the real or effective user ID
void ); uid_t geteuid(
[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.
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.
The getuid() function returns the real user ID of the
The geteuid() function returns the effective user ID of
the calling process.
These functions are always successful, and no return value
is reserved to indicate an error.
Functions: setreuid(2), setruid(3), setuid(2)
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