|GETUID(2)||System Calls Manual||GETUID(2)|
— get user identification
Standard C Library (libc, -lc)
system call returns the real user ID of the calling process. The
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
is used to determine the real-user-id of the calling process.
geteuid() system calls are always successful, and no
return value is reserved to indicate an error.
getuid() system calls are expected to conform to
IEEE Std 1003.1-1990 (“POSIX.1”).
getuid() function appeared in
Version 1 AT&T UNIX. The
geteuid() function appeared in
Version 4 AT&T UNIX.
|December 1, 2017||Debian|