pwd/putpwent.c

   1 /* Copyright (C) 1991-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <stdio.h>
  20 #include <pwd.h>
  21
  22 #define _S(x)   x ?: ""
  23
  24 /* Write an entry to the given stream.
  25    This must know the format of the password file.  */
  26 int
  27 putpwent (p, stream)
  28      const struct passwd *p;
  29      FILE *stream;
  30 {
  31   if (p == NULL || stream == NULL)
  32     {
  33       __set_errno (EINVAL);
  34       return -1;
  35     }
  36
  37   if (p->pw_name[0] == '+' || p->pw_name[0] == '-')
  38     {
  39       if (fprintf (stream, "%s:%s:::%s:%s:%s\n",
  40                    p->pw_name, _S (p->pw_passwd),
  41                    _S (p->pw_gecos), _S (p->pw_dir), _S (p->pw_shell)) < 0)
  42         return -1;
  43     }
  44   else
  45     {
  46       if (fprintf (stream, "%s:%s:%lu:%lu:%s:%s:%s\n",
  47                    p->pw_name, _S (p->pw_passwd),
  48                    (unsigned long int) p->pw_uid,
  49                    (unsigned long int) p->pw_gid,
  50                    _S (p->pw_gecos), _S (p->pw_dir), _S (p->pw_shell)) < 0)
  51         return -1;
  52     }
  53   return 0;
  54 }