getuid(2)getuid(2)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 stan‐
dards 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)getuid(2)
