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16a10468 | 1 | /* Create a device file relative to an open directory. Hurd version. |
b168057a | 2 | Copyright (C) 1991-2015 Free Software Foundation, Inc. |
16a10468 RM |
3 | This file is part of the GNU C Library. |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
16a10468 RM |
18 | |
19 | #include <errno.h> | |
20 | #include <sys/stat.h> | |
21 | #include <hurd.h> | |
22 | #include <hurd/fd.h> | |
23 | #include <hurd/paths.h> | |
24 | #include <fcntl.h> | |
eb96ffb0 | 25 | #include <_itoa.h> |
16a10468 RM |
26 | #include <string.h> |
27 | #include <sys/types.h> | |
28 | ||
29 | /* Create a device file named PATH relative to FD, with permission and | |
30 | special bits MODE and device number DEV (which can be constructed | |
31 | from major and minor device numbers with the `makedev' macro | |
32 | above). */ | |
33 | int | |
34 | __xmknodat (int vers, int fd, const char *path, mode_t mode, dev_t *dev) | |
35 | { | |
918d4d71 | 36 | error_t errnode, err; |
16a10468 RM |
37 | file_t dir, node; |
38 | char *name; | |
39 | char buf[100], *bp; | |
40 | const char *translator; | |
41 | size_t len; | |
42 | ||
43 | if (vers != _MKNOD_VER) | |
44 | return __hurd_fail (EINVAL); | |
45 | ||
46 | if (S_ISCHR (mode)) | |
47 | { | |
48 | translator = _HURD_CHRDEV; | |
49 | len = sizeof (_HURD_CHRDEV); | |
50 | } | |
51 | else if (S_ISBLK (mode)) | |
52 | { | |
53 | translator = _HURD_BLKDEV; | |
54 | len = sizeof (_HURD_BLKDEV); | |
55 | } | |
56 | else if (S_ISFIFO (mode)) | |
57 | { | |
58 | translator = _HURD_FIFO; | |
59 | len = sizeof (_HURD_FIFO); | |
60 | } | |
61 | else if (S_ISREG (mode)) | |
62 | { | |
63 | translator = NULL; | |
64 | len = 0; | |
65 | } | |
66 | else | |
67 | { | |
68 | errno = EINVAL; | |
69 | return -1; | |
70 | } | |
71 | ||
72 | if (translator != NULL && ! S_ISFIFO (mode)) | |
73 | { | |
74 | /* We set the translator to "ifmt\0major\0minor\0", where IFMT | |
75 | depends on the S_IFMT bits of our MODE argument, and MAJOR and | |
76 | MINOR are ASCII decimal (octal or hex would do as well) | |
77 | representations of our arguments. Thus the convention is that | |
78 | CHRDEV and BLKDEV translators are invoked with two non-switch | |
79 | arguments, giving the major and minor device numbers in %i format. */ | |
80 | ||
81 | bp = buf + sizeof (buf); | |
82 | *--bp = '\0'; | |
83 | bp = _itoa (minor (*dev), bp, 10, 0); | |
84 | *--bp = '\0'; | |
85 | bp = _itoa (major (*dev), bp, 10, 0); | |
86 | memcpy (bp - len, translator, len); | |
87 | translator = bp - len; | |
88 | len = buf + sizeof (buf) - translator; | |
89 | } | |
90 | ||
91 | dir = __file_name_split_at (fd, path, &name); | |
92 | if (dir == MACH_PORT_NULL) | |
93 | return -1; | |
94 | ||
95 | /* Create a new, unlinked node in the target directory. */ | |
918d4d71 | 96 | errnode = err = __dir_mkfile (dir, O_WRITE, (mode & ~S_IFMT) & ~_hurd_umask, &node); |
16a10468 RM |
97 | |
98 | if (! err && translator != NULL) | |
99 | /* Set the node's translator to make it a device. */ | |
100 | err = __file_set_translator (node, | |
101 | FS_TRANS_EXCL | FS_TRANS_SET, | |
102 | FS_TRANS_EXCL | FS_TRANS_SET, 0, | |
103 | translator, len, | |
104 | MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND); | |
105 | ||
106 | if (! err) | |
107 | /* Link the node, now a valid device, into the target directory. */ | |
108 | err = __dir_link (dir, node, name, 1); | |
109 | ||
110 | __mach_port_deallocate (__mach_task_self (), dir); | |
918d4d71 ST |
111 | if (! errnode) |
112 | __mach_port_deallocate (__mach_task_self (), node); | |
16a10468 RM |
113 | |
114 | if (err) | |
115 | return __hurd_fail (err); | |
116 | return 0; | |
117 | } |