getpw.c

一个C源代码分析器

/* Copyright (C) 1991, 1992 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <ansidecl.h>
#include <errno.h>
#include <stdio.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
DEFUN(getpw, (uid, buf), __uid_t uid AND register char *buf)
{
  register struct passwd *p;

  if (buf == NULL)
    {
      errno = EINVAL;
      return -1;
    }

  p = getpwuid (uid);
  if (p == NULL)
    return -1;

  if (sprintf (buf, "%s:%s:%u:%u:%s:%s:%s", p->pw_name, p->pw_passwd,
	       p->pw_uid, p->pw_gid, p->pw_gecos, p->pw_dir, p->pw_shell) < 0)
    return -1;

  return 0;
}