63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/* Copyright (C) 1991-2022 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 <alloca.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <pwd.h>
|
|
|
|
|
|
/* Re-construct the password-file line for the given uid
|
|
in the given buffer. This knows the format that the caller
|
|
will expect, but this need not be the format of the password file. */
|
|
|
|
int __getpw (__uid_t uid, char *buf);
|
|
|
|
int
|
|
__getpw (__uid_t uid, char *buf)
|
|
{
|
|
size_t buflen;
|
|
char *tmpbuf;
|
|
struct passwd resbuf, *p;
|
|
|
|
if (buf == NULL)
|
|
{
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
buflen = __sysconf (_SC_GETPW_R_SIZE_MAX);
|
|
tmpbuf = alloca (buflen);
|
|
|
|
if (__getpwuid_r (uid, &resbuf, tmpbuf, buflen, &p) != 0)
|
|
return -1;
|
|
|
|
if (p == NULL)
|
|
return -1;
|
|
|
|
if (sprintf (buf, "%s:%s:%lu:%lu:%s:%s:%s", p->pw_name, p->pw_passwd,
|
|
(unsigned long int) p->pw_uid, (unsigned long int) p->pw_gid,
|
|
p->pw_gecos, p->pw_dir, p->pw_shell) < 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
weak_alias (__getpw, getpw)
|
|
|
|
link_warning (getpw, "the `getpw' function is dangerous and should not be used.")
|