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glibc  2.9
putpwent.c
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00001 /* Copyright (C) 1991,1992,1996,1997,1998,2005 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <stdio.h>
00021 #include <pwd.h>
00022 
00023 #define _S(x) x ?: ""
00024 
00025 /* Write an entry to the given stream.
00026    This must know the format of the password file.  */
00027 int
00028 putpwent (p, stream)
00029      const struct passwd *p;
00030      FILE *stream;
00031 {
00032   if (p == NULL || stream == NULL)
00033     {
00034       __set_errno (EINVAL);
00035       return -1;
00036     }
00037 
00038   if (p->pw_name[0] == '+' || p->pw_name[0] == '-')
00039     {
00040       if (fprintf (stream, "%s:%s:::%s:%s:%s\n",
00041                  p->pw_name, _S (p->pw_passwd),
00042                  _S (p->pw_gecos), _S (p->pw_dir), _S (p->pw_shell)) < 0)
00043        return -1;
00044     }
00045   else
00046     {
00047       if (fprintf (stream, "%s:%s:%lu:%lu:%s:%s:%s\n",
00048                  p->pw_name, _S (p->pw_passwd),
00049                  (unsigned long int) p->pw_uid,
00050                  (unsigned long int) p->pw_gid,
00051                  _S (p->pw_gecos), _S (p->pw_dir), _S (p->pw_shell)) < 0)
00052        return -1;
00053     }
00054   return 0;
00055 }