59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/* Get a host configuration item kept as the whole contents of a file.
|
|
Copyright (C) 1996, 1997 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., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <fcntl.h>
|
|
#include <hurd.h>
|
|
#include "hurdhost.h"
|
|
|
|
ssize_t
|
|
_hurd_get_host_config (const char *item, char *buf, size_t buflen)
|
|
{
|
|
error_t err;
|
|
char *data;
|
|
mach_msg_type_number_t nread, more;
|
|
file_t config = __file_name_lookup (item, O_RDONLY, 0);
|
|
if (config == MACH_PORT_NULL)
|
|
return -1;
|
|
|
|
data = buf;
|
|
err = __io_read (config, &data, &nread, -1, buflen);
|
|
if (! err)
|
|
/* Check if there is more in the file we didn't read. */
|
|
err = __io_readable (config, &more);
|
|
__mach_port_deallocate (__mach_task_self (), config);
|
|
if (err)
|
|
return __hurd_fail (err);
|
|
if (data != buf)
|
|
{
|
|
memcpy (buf, data, nread);
|
|
__vm_deallocate (__mach_task_self (), (vm_address_t) data, nread);
|
|
}
|
|
|
|
/* Remove newlines in case someone wrote the file by hand. */
|
|
while (buf[nread - 1] == '\n')
|
|
buf[--nread] = '\0';
|
|
|
|
if (more)
|
|
/* If we didn't read the whole file, tell the caller to use a bigger
|
|
buffer next time. */
|
|
return __hurd_fail (ENAMETOOLONG);
|
|
|
|
return nread;
|
|
}
|