GETUID(2) Linux Programmer s Manual GETUID(2)

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 calling process.

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

ERRORS These functions are always successful.


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

SEE ALSO getresuid(2), setreuid(2), setuid(2), credentials(7)

COLOPHON This page is part of release 3.22 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at

Linux 1993-07-23 GETUID(2)