1 /* Create a device file relative to an open directory. Hurd version.
2 Copyright (C) 1991-2018 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
23 #include <hurd/paths.h>
27 #include <sys/types.h>
28 #include <sys/sysmacros.h>
30 /* Create a device file named PATH relative to FD, with permission and
31 special bits MODE and device number DEV (which can be constructed
32 from major and minor device numbers with the `makedev' macro
35 __xmknodat (int vers
, int fd
, const char *path
, mode_t mode
, dev_t
*dev
)
41 const char *translator
;
44 if (vers
!= _MKNOD_VER
)
45 return __hurd_fail (EINVAL
);
49 translator
= _HURD_CHRDEV
;
50 len
= sizeof (_HURD_CHRDEV
);
52 else if (S_ISBLK (mode
))
54 translator
= _HURD_BLKDEV
;
55 len
= sizeof (_HURD_BLKDEV
);
57 else if (S_ISFIFO (mode
))
59 translator
= _HURD_FIFO
;
60 len
= sizeof (_HURD_FIFO
);
62 else if (S_ISREG (mode
))
73 if (translator
!= NULL
&& ! S_ISFIFO (mode
))
75 /* We set the translator to "ifmt\0major\0minor\0", where IFMT
76 depends on the S_IFMT bits of our MODE argument, and MAJOR and
77 MINOR are ASCII decimal (octal or hex would do as well)
78 representations of our arguments. Thus the convention is that
79 CHRDEV and BLKDEV translators are invoked with two non-switch
80 arguments, giving the major and minor device numbers in %i format. */
82 bp
= buf
+ sizeof (buf
);
84 bp
= _itoa (__gnu_dev_minor (*dev
), bp
, 10, 0);
86 bp
= _itoa (__gnu_dev_major (*dev
), bp
, 10, 0);
87 memcpy (bp
- len
, translator
, len
);
88 translator
= bp
- len
;
89 len
= buf
+ sizeof (buf
) - translator
;
92 dir
= __file_name_split_at (fd
, path
, &name
);
93 if (dir
== MACH_PORT_NULL
)
96 /* Create a new, unlinked node in the target directory. */
97 errnode
= err
= __dir_mkfile (dir
, O_WRITE
, (mode
& ~S_IFMT
) & ~_hurd_umask
, &node
);
99 if (! err
&& translator
!= NULL
)
100 /* Set the node's translator to make it a device. */
101 err
= __file_set_translator (node
,
102 FS_TRANS_EXCL
| FS_TRANS_SET
,
103 FS_TRANS_EXCL
| FS_TRANS_SET
, 0,
105 MACH_PORT_NULL
, MACH_MSG_TYPE_COPY_SEND
);
108 /* Link the node, now a valid device, into the target directory. */
109 err
= __dir_link (dir
, node
, name
, 1);
111 __mach_port_deallocate (__mach_task_self (), dir
);
113 __mach_port_deallocate (__mach_task_self (), node
);
116 return __hurd_fail (err
);
120 libc_hidden_def (__xmknodat
)