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1 | /* Copyright (C) 1997,1998,1999,2000,2002,2003,2006 |
2 | Free Software Foundation, Inc. | |
aff4519d UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
20 | ||
21 | #include <errno.h> | |
22 | #include <unistd.h> | |
23 | ||
24 | #include <sysdep-cancel.h> | |
25 | #include <sys/syscall.h> | |
26 | #include <bp-checks.h> | |
27 | ||
0ecb606c | 28 | #include <kernel-features.h> |
aff4519d UD |
29 | |
30 | #if defined __NR_pwrite || __ASSUME_PWRITE_SYSCALL > 0 | |
31 | ||
32 | # if __ASSUME_PWRITE_SYSCALL == 0 | |
33 | static ssize_t __emulate_pwrite64 (int fd, const void *buf, size_t count, | |
34 | off64_t offset) internal_function; | |
35 | # endif | |
36 | ||
37 | ||
38 | ssize_t | |
39 | __libc_pwrite64 (fd, buf, count, offset) | |
40 | int fd; | |
41 | const void *buf; | |
42 | size_t count; | |
43 | off64_t offset; | |
44 | { | |
45 | ssize_t result; | |
46 | ||
47 | if (SINGLE_THREAD_P) | |
48 | { | |
49 | result = INLINE_SYSCALL (pwrite, 4, fd, CHECK_N (buf, count), count, | |
50 | offset); | |
51 | # if __ASSUME_PWRITE_SYSCALL == 0 | |
52 | if (result == -1 && errno == ENOSYS) | |
53 | /* No system call available. Use the emulation. */ | |
54 | result = __emulate_pwrite64 (fd, buf, count, offset); | |
55 | # endif | |
56 | ||
57 | return result; | |
58 | } | |
59 | ||
60 | int oldtype = LIBC_CANCEL_ASYNC (); | |
61 | ||
62 | result = INLINE_SYSCALL (pwrite, 4, fd, CHECK_N (buf, count), count, | |
63 | offset); | |
64 | # if __ASSUME_PWRITE_SYSCALL == 0 | |
65 | if (result == -1 && errno == ENOSYS) | |
66 | /* No system call available. Use the emulation. */ | |
67 | result = __emulate_pwrite64 (fd, buf, count, offset); | |
68 | # endif | |
69 | ||
70 | LIBC_CANCEL_RESET (oldtype); | |
71 | ||
72 | return result; | |
73 | } | |
74 | ||
75 | weak_alias (__libc_pwrite64, __pwrite64) | |
76 | libc_hidden_weak (__pwrite64) | |
77 | weak_alias (__libc_pwrite64, pwrite64) | |
78 | ||
79 | # define __libc_pwrite64(fd, buf, count, offset) \ | |
80 | static internal_function __emulate_pwrite64 (fd, buf, count, offset) | |
81 | #endif | |
82 | ||
83 | #if __ASSUME_PWRITE_SYSCALL == 0 | |
84 | # include <sysdeps/posix/pwrite64.c> | |
85 | #endif |