1 /* POSIX compatible FILE stream write function.
2 Copyright (C) 2008-2013 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2008.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU 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.
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 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* Replace these functions only if module 'nonblocking' or module 'sigpipe' is
25 #if GNULIB_NONBLOCKING || GNULIB_SIGPIPE
27 /* On native Windows platforms, SIGPIPE does not exist. When write() is
28 called on a pipe with no readers, WriteFile() fails with error
29 GetLastError() = ERROR_NO_DATA, and write() in consequence fails with
30 error EINVAL. This write() function is at the basis of the function
31 which flushes the buffer of a FILE stream. */
33 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
39 # define WIN32_LEAN_AND_MEAN /* avoid including junk */
42 # include "msvc-nothrow.h"
44 # if GNULIB_NONBLOCKING
45 # define CLEAR_ERRNO \
47 # define HANDLE_ENOSPC \
48 if (errno == ENOSPC && ferror (stream)) \
50 int fd = fileno (stream); \
53 HANDLE h = (HANDLE) _get_osfhandle (fd); \
54 if (GetFileType (h) == FILE_TYPE_PIPE) \
56 /* h is a pipe or socket. */ \
58 if (GetNamedPipeHandleState (h, &state, NULL, NULL, \
60 && (state & PIPE_NOWAIT) != 0) \
61 /* h is a pipe in non-blocking mode. \
62 Change errno from ENOSPC to EAGAIN. */ \
70 # define HANDLE_ENOSPC
74 # define CLEAR_LastError \
76 # define HANDLE_ERROR_NO_DATA \
77 if (GetLastError () == ERROR_NO_DATA && ferror (stream)) \
79 int fd = fileno (stream); \
81 && GetFileType ((HANDLE) _get_osfhandle (fd)) \
84 /* Try to raise signal SIGPIPE. */ \
86 /* If it is currently blocked or ignored, change errno from \
93 # define CLEAR_LastError
94 # define HANDLE_ERROR_NO_DATA
97 # define CALL_WITH_SIGPIPE_EMULATION(RETTYPE, EXPRESSION, FAILED) \
98 if (ferror (stream)) \
99 return (EXPRESSION); \
105 ret = (EXPRESSION); \
109 HANDLE_ERROR_NO_DATA \
115 # if !REPLACE_PRINTF_POSIX /* avoid collision with printf.c */
117 printf (const char *format, ...)
122 va_start (args, format);
123 retval = vfprintf (stdout, format, args);
130 # if !REPLACE_FPRINTF_POSIX /* avoid collision with fprintf.c */
132 fprintf (FILE *stream, const char *format, ...)
137 va_start (args, format);
138 retval = vfprintf (stream, format, args);
145 # if !REPLACE_VPRINTF_POSIX /* avoid collision with vprintf.c */
147 vprintf (const char *format, va_list args)
149 return vfprintf (stdout, format, args);
153 # if !REPLACE_VFPRINTF_POSIX /* avoid collision with vfprintf.c */
155 vfprintf (FILE *stream, const char *format, va_list args)
158 CALL_WITH_SIGPIPE_EMULATION (int, vfprintf (stream, format, args), ret == EOF)
165 return fputc (c, stdout);
169 fputc (int c, FILE *stream)
172 CALL_WITH_SIGPIPE_EMULATION (int, fputc (c, stream), ret == EOF)
176 fputs (const char *string, FILE *stream)
179 CALL_WITH_SIGPIPE_EMULATION (int, fputs (string, stream), ret == EOF)
183 puts (const char *string)
186 FILE *stream = stdout;
187 CALL_WITH_SIGPIPE_EMULATION (int, puts (string), ret == EOF)
191 fwrite (const void *ptr, size_t s, size_t n, FILE *stream)
194 CALL_WITH_SIGPIPE_EMULATION (size_t, fwrite (ptr, s, n, stream), ret < n)