CUSERID(3) | Library Functions Manual | CUSERID(3) |
cuserid
—
#include <stdio.h>
char *
cuserid
(char
*buf);
The cuserid
() function returns a character
string representation of the user name associated with the effective user ID
of the calling process.
If buf is not the
NULL
pointer, the user name is copied into the
memory referenced by buf. The argument
buf is assumed to point to an array at least
L_cuserid
(as defined in the include file
<stdio.h>
) bytes long.
Otherwise, the user name is copied to a static buffer.
NULL
pointer,
buf is returned; otherwise the address of the static
buffer is returned.
If the user name could not be determined, if
buf is not the NULL
pointer,
the null character ‘\0’ will be stored at
*buf; otherwise the NULL
pointer is returned.
cuserid
() function conforms to IEEE
Std 1003.1-1988 (“POSIX.1”).
cuserid
() was removed from the IEEE
Std 1003.1-1990 (“POSIX.1”) standard. This implementation
exists purely for compatibility with existing programs. New programs should
use one of the following three alternatives to obtain the user name:
getlogin
() to return the user's login name.getpwuid
(geteuid
()) to
return the user name associated with the calling process' effective user
ID.getpwuid
(getuid
()) to
return the user name associated with the calling process' real user
ID.November 28, 1993 | NetBSD 9.2 |