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16a10468 | 1 | /* Create a device file relative to an open directory. Hurd version. |
04277e02 | 2 | Copyright (C) 1991-2019 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> | |
85285a0c | 28 | #include <sys/sysmacros.h> |
16a10468 RM |
29 | |
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 | |
33 | above). */ | |
34 | int | |
35 | __xmknodat (int vers, int fd, const char *path, mode_t mode, dev_t *dev) | |
36 | { | |
918d4d71 | 37 | error_t errnode, err; |
16a10468 RM |
38 | file_t dir, node; |
39 | char *name; | |
40 | char buf[100], *bp; | |
41 | const char *translator; | |
42 | size_t len; | |
43 | ||
44 | if (vers != _MKNOD_VER) | |
45 | return __hurd_fail (EINVAL); | |
46 | ||
47 | if (S_ISCHR (mode)) | |
48 | { | |
49 | translator = _HURD_CHRDEV; | |
50 | len = sizeof (_HURD_CHRDEV); | |
51 | } | |
52 | else if (S_ISBLK (mode)) | |
53 | { | |
54 | translator = _HURD_BLKDEV; | |
55 | len = sizeof (_HURD_BLKDEV); | |
56 | } | |
57 | else if (S_ISFIFO (mode)) | |
58 | { | |
59 | translator = _HURD_FIFO; | |
60 | len = sizeof (_HURD_FIFO); | |
61 | } | |
62 | else if (S_ISREG (mode)) | |
63 | { | |
64 | translator = NULL; | |
65 | len = 0; | |
66 | } | |
67 | else | |
68 | { | |
69 | errno = EINVAL; | |
70 | return -1; | |
71 | } | |
72 | ||
73 | if (translator != NULL && ! S_ISFIFO (mode)) | |
74 | { | |
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. */ | |
81 | ||
82 | bp = buf + sizeof (buf); | |
83 | *--bp = '\0'; | |
8b4a1182 | 84 | bp = _itoa (__gnu_dev_minor (*dev), bp, 10, 0); |
16a10468 | 85 | *--bp = '\0'; |
8b4a1182 | 86 | bp = _itoa (__gnu_dev_major (*dev), bp, 10, 0); |
16a10468 RM |
87 | memcpy (bp - len, translator, len); |
88 | translator = bp - len; | |
89 | len = buf + sizeof (buf) - translator; | |
90 | } | |
91 | ||
92 | dir = __file_name_split_at (fd, path, &name); | |
93 | if (dir == MACH_PORT_NULL) | |
94 | return -1; | |
95 | ||
96 | /* Create a new, unlinked node in the target directory. */ | |
918d4d71 | 97 | errnode = err = __dir_mkfile (dir, O_WRITE, (mode & ~S_IFMT) & ~_hurd_umask, &node); |
16a10468 RM |
98 | |
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, | |
104 | translator, len, | |
105 | MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND); | |
106 | ||
107 | if (! err) | |
108 | /* Link the node, now a valid device, into the target directory. */ | |
109 | err = __dir_link (dir, node, name, 1); | |
110 | ||
111 | __mach_port_deallocate (__mach_task_self (), dir); | |
918d4d71 ST |
112 | if (! errnode) |
113 | __mach_port_deallocate (__mach_task_self (), node); | |
16a10468 RM |
114 | |
115 | if (err) | |
116 | return __hurd_fail (err); | |
117 | return 0; | |
118 | } | |
6e45e6ef ST |
119 | |
120 | libc_hidden_def (__xmknodat) |