1 /* Copyright (C) 1991-2022 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 <https://www.gnu.org/licenses/>. */
17
18 #include <errno.h>
19 #include <fcntl.h>
20 #include <sys/types.h>
21 #include <unistd.h>
22 #include <hurd.h>
23
24 /* Truncate FILE_NAME to LENGTH bytes. */
25 int
__truncate(const char * file_name,off_t length)26 __truncate (const char *file_name, off_t length)
27 {
28 error_t err;
29 file_t file = __file_name_lookup (file_name, O_WRITE, 0);
30
31 if (file == MACH_PORT_NULL)
32 return -1;
33
34 err = __file_set_size (file, length);
35 __mach_port_deallocate (__mach_task_self (), file);
36
37 if (err)
38 return __hurd_fail (err);
39 return 0;
40 }
41 weak_alias (__truncate, truncate)
42