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9b36a80c LC |
1 | /* POSIX compatible write() function. |
2 | Copyright (C) 2008 Free Software Foundation, Inc. | |
3 | Written by Bruno Haible <bruno@clisp.org>, 2008. | |
4 | ||
5 | This program is free software: you can redistribute it and/or modify | |
6 | it under the terms of the GNU Lesser General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program 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 | |
13 | GNU Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <config.h> | |
19 | ||
20 | /* Specification. */ | |
21 | #include <unistd.h> | |
22 | ||
23 | /* Replace this function only if module 'sigpipe' is requested. */ | |
24 | #if GNULIB_SIGPIPE | |
25 | ||
26 | /* On native Windows platforms, SIGPIPE does not exist. When write() is | |
27 | called on a pipe with no readers, WriteFile() fails with error | |
28 | GetLastError() = ERROR_NO_DATA, and write() in consequence fails with | |
29 | error EINVAL. */ | |
30 | ||
31 | # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ | |
32 | ||
33 | # include <errno.h> | |
34 | # include <signal.h> | |
35 | # include <io.h> | |
36 | ||
37 | # define WIN32_LEAN_AND_MEAN /* avoid including junk */ | |
38 | # include <windows.h> | |
39 | ||
40 | ssize_t | |
41 | rpl_write (int fd, const void *buf, size_t count) | |
42 | #undef write | |
43 | { | |
44 | ssize_t ret = write (fd, buf, count); | |
45 | ||
46 | if (ret < 0) | |
47 | { | |
48 | if (GetLastError () == ERROR_NO_DATA | |
49 | && GetFileType (_get_osfhandle (fd)) == FILE_TYPE_PIPE) | |
50 | { | |
51 | /* Try to raise signal SIGPIPE. */ | |
52 | raise (SIGPIPE); | |
53 | /* If it is currently blocked or ignored, change errno from EINVAL | |
54 | to EPIPE. */ | |
55 | errno = EPIPE; | |
56 | } | |
57 | } | |
58 | return ret; | |
59 | } | |
60 | ||
61 | # endif | |
62 | #endif |