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d4697bc9 | 1 | /* Copyright (C) 2011-2014 Free Software Foundation, Inc. |
f1f929d7 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. | |
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/>. */ | |
f1f929d7 UD |
18 | |
19 | #include <errno.h> | |
20 | #include <sys/socket.h> | |
21 | ||
22 | #include <sysdep-cancel.h> | |
23 | #include <sys/syscall.h> | |
24 | #include <kernel-features.h> | |
25 | ||
26 | ||
27 | #ifdef __NR_sendmmsg | |
28 | int | |
123be9de | 29 | __sendmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags) |
f1f929d7 UD |
30 | { |
31 | if (SINGLE_THREAD_P) | |
32 | return INLINE_SYSCALL (sendmmsg, 4, fd, vmessages, vlen, flags); | |
33 | ||
34 | int oldtype = LIBC_CANCEL_ASYNC (); | |
35 | ||
36 | int result = INLINE_SYSCALL (sendmmsg, 4, fd, vmessages, vlen, flags); | |
37 | ||
38 | LIBC_CANCEL_RESET (oldtype); | |
39 | ||
40 | return result; | |
41 | } | |
123be9de TS |
42 | libc_hidden_def (__sendmmsg) |
43 | weak_alias (__sendmmsg, sendmmsg) | |
f1f929d7 UD |
44 | #elif defined __NR_socketcall |
45 | # ifndef __ASSUME_SENDMMSG | |
46 | extern int __internal_sendmmsg (int fd, struct mmsghdr *vmessages, | |
47 | unsigned int vlen, int flags) | |
48 | attribute_hidden; | |
49 | ||
50 | static int have_sendmmsg; | |
51 | ||
52 | int | |
123be9de | 53 | __sendmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags) |
f1f929d7 | 54 | { |
a1ffb40e | 55 | if (__glibc_likely (have_sendmmsg >= 0)) |
f1f929d7 UD |
56 | { |
57 | int ret = __internal_sendmmsg (fd, vmessages, vlen, flags); | |
58 | /* The kernel returns -EINVAL for unknown socket operations. | |
59 | We need to convert that error to an ENOSYS error. */ | |
60 | if (__builtin_expect (ret < 0, 0) | |
61 | && have_sendmmsg == 0 | |
62 | && errno == EINVAL) | |
63 | { | |
64 | /* Try another call, this time with an invalid file | |
65 | descriptor and all other parameters cleared. This call | |
66 | will not cause any harm and it will return | |
67 | immediately. */ | |
68 | ret = __internal_sendmmsg (-1, 0, 0, 0); | |
69 | if (errno == EINVAL) | |
70 | { | |
71 | have_sendmmsg = -1; | |
72 | __set_errno (ENOSYS); | |
73 | } | |
74 | else | |
75 | { | |
76 | have_sendmmsg = 1; | |
77 | __set_errno (EINVAL); | |
78 | } | |
79 | return -1; | |
80 | } | |
81 | return ret; | |
82 | } | |
83 | __set_errno (ENOSYS); | |
84 | return -1; | |
85 | } | |
123be9de TS |
86 | libc_hidden_def (__sendmmsg) |
87 | weak_alias (__sendmmsg, sendmmsg) | |
f1f929d7 UD |
88 | # else |
89 | /* When __ASSUME_SENDMMSG sendmmsg is defined in internal_sendmmsg.S. */ | |
90 | # endif | |
91 | #else | |
123be9de | 92 | # include <socket/sendmmsg.c> |
f1f929d7 | 93 | #endif |