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GETUID(2)		       System Calls Manual		       GETUID(2)

NAME
     getuid, geteuid -- get user identification

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.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 re-
     turn 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() function appeared in Version 1 AT&T UNIX.  The geteuid() func-
     tion appeared in Version 4 AT&T UNIX.

FreeBSD ports 15.1		December 1, 2017		       GETUID(2)

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