SIMPLE SOLUTIONS

GETUID(2FREEBSD) - man page online | system calls

Get user identification.

Chapter
June 4, 1993
GETUID(2)                            BSD System Calls Manual                            GETUID(2)

NAME

getuid, geteuid — get user identification

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <unistd.h> #include <sys/types.h> uid_t getuid(void); uid_t geteuid(void);

DESCRIPTION

The getuid() system call returns the real user ID of the calling process. The geteuid() system call returns the effective user ID of the calling process. The real user ID is that of the user who has invoked the program. As the effective user ID gives the process additional permissions during execution of “set-user-ID” mode processes, getuid() is used to determine the real-user-id of the calling process.

ERRORS

The getuid() and geteuid() system calls are always successful, and no return value is reserved to indicate an error.

SEE ALSO

getgid(2), issetugid(2), setgid(2), setreuid(2), setuid(2)

STANDARDS

The geteuid() and getuid() system calls are expected to conform to ISO/IEC 9945-1:1990 (“POSIX.1”).

HISTORY

The getuid() and geteuid() functions appeared in Version 7 AT&T UNIX.
BSD June 4, 1993 BSD
This manual Reference Other manuals
getuid(2freebsd) referred by
refer to getgid(2) | getuid(2) | issetugid(2freebsd) | setgid(2) | setreuid(2) | setuid(2)