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| author | Bruno Haible <bruno@clisp.org> | 2011-04-13 12:15:43 +0200 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2011-04-13 12:36:36 +0200 |
| commit | 836e0457064eb3b0b21bd2d4954cbc428a6b6277 (patch) | |
| tree | 5466b66802cbd300723885338d5a6d5fe68192a8 /doc/posix-functions/write.texi | |
| parent | fb799692f5bb43310424977e0ca15599fc68d776 (diff) | |
| download | gnulib-836e0457064eb3b0b21bd2d4954cbc428a6b6277.tar.gz | |
Support non-blocking pipe I/O in write() on native Windows.
* lib/unistd.in.h (write): Enable replacement also if
GNULIB_UNISTD_H_NONBLOCKING is 1.
* lib/write.c: Enable replacement also if GNULIB_NONBLOCKING.
(rpl_write): When failing to write on a non-blocking pipe, change
errno from ENOSPC to EAGAIN.
* lib/stdio.in.h (fprintf, fputc, fputs, fwrite, printf, putc,
putchar, puts, vfprintf, vprintf): Enable replacement also if
GNULIB_STDIO_H_NONBLOCKING is 1.
* lib/stdio-write.c: Enable replacements also if GNULIB_NONBLOCKING.
(CLEAR_ERRNO, HANDLE_ENOSPC): New macros.
(CLEAR_LastError, HANDLE_ERROR_NO_DATA): New macros, extracted from
CALL_WITH_SIGPIPE_EMULATION.
(CALL_WITH_SIGPIPE_EMULATION): Use them.
* m4/nonblocking.m4: New file.
* m4/write.m4 (gl_FUNC_WRITE): Enable REPLACE_WRITE also if required
for non-blocking I/O support.
* m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Initialize
GNULIB_UNISTD_H_NONBLOCKING.
* m4/stdio_h.m4 (gl_STDIO_H): Enable REPLACE_STDIO_WRITE_FUNCS also if
required for non-blocking I/O support.
(gl_STDIO_H_DEFAULTS): Initialize GNULIB_STDIO_H_NONBLOCKING.
* modules/nonblocking (Files): Add m4/nonblocking.m4,
lib/stdio-write.c, m4/asm-underscore.m4.
(Depends-on): Add stdio, unistd.
(configure.ac): Invoke gl_NONBLOCKING_IO. Define GNULIB_NONBLOCKING.
Set GNULIB_STDIO_H_NONBLOCKING, GNULIB_UNISTD_H_NONBLOCKING.
* modules/unistd (Makefile.am): Substitute GNULIB_UNISTD_H_NONBLOCKING.
* modules/stdio (Makefile.am): Substitute GNULIB_STDIO_H_NONBLOCKING.
* doc/posix-functions/fprintf.texi: Mention 'nonblocking' module and
problem with non-blocking pipes.
* doc/posix-functions/fputc.texi: Likewise.
* doc/posix-functions/fputs.texi: Likewise.
* doc/posix-functions/fwrite.texi: Likewise.
* doc/posix-functions/printf.texi: Likewise.
* doc/posix-functions/putc.texi: Likewise.
* doc/posix-functions/putchar.texi: Likewise.
* doc/posix-functions/puts.texi: Likewise.
* doc/posix-functions/vfprintf.texi: Likewise.
* doc/posix-functions/vprintf.texi: Likewise.
* doc/posix-functions/write.texi: Likewise.
Diffstat (limited to 'doc/posix-functions/write.texi')
| -rw-r--r-- | doc/posix-functions/write.texi | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/doc/posix-functions/write.texi b/doc/posix-functions/write.texi index 826151c9ee..7587fbb9d9 100644 --- a/doc/posix-functions/write.texi +++ b/doc/posix-functions/write.texi @@ -4,9 +4,18 @@ POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/write.html} -Gnulib module: write, sigpipe +Gnulib module: write, nonblocking, sigpipe -Portability problems fixed by Gnulib: +Portability problems fixed by Gnulib module @code{stdio}, together with module @code{nonblocking}: +@itemize +@item +When writing to a non-blocking pipe whose buffer is full, this function fails +with @code{errno} being set to @code{ENOSPC} instead of @code{EAGAIN} on some +platforms: +mingw. +@end itemize + +Portability problems fixed by Gnulib module @code{stdio}, together with module @code{sigpipe}: @itemize @item When writing to a pipe with no readers, this function fails with error |