mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 01:21:06 +00:00
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
|
|
/* Return the username of the caller.
|
|
If S is not NULL, it points to a buffer of at least L_cuserid bytes
|
|
into which the name is copied; otherwise, a static buffer is used. */
|
|
char *
|
|
cuserid (char *s)
|
|
{
|
|
static char name[L_cuserid];
|
|
char buf[NSS_BUFLEN_PASSWD];
|
|
struct passwd pwent;
|
|
struct passwd *pwptr;
|
|
|
|
if (__getpwuid_r (__geteuid (), &pwent, buf, sizeof (buf), &pwptr)
|
|
|| pwptr == NULL)
|
|
{
|
|
if (s != NULL)
|
|
s[0] = '\0';
|
|
return s;
|
|
}
|
|
|
|
if (s == NULL)
|
|
s = name;
|
|
s[L_cuserid - 1] = '\0';
|
|
return strncpy (s, pwptr->pw_name, L_cuserid - 1);
|
|
}
|