getuid() System Call in Linux

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NAME

getuid, geteuid - get user identity

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 current process.

geteuid() returns the effective user ID of the current process.

ERRORS

These functions are always successful.

CONFORMING TO

POSIX.1-2001, 4.3BSD.

HISTORY

In Unix V6 the getuid() call returned (euid << 8) + uid. Unix V7 introduced separate calls getuid() and geteuid().

SEE ALSO

• setreuid (2)

• setuid (2)