/* Copyright (C) 1991-2018 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

   <http://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.")