strchrnul: work around cygwin bug

[pspp] / doc / posix-functions / write.texi

diff --git a/doc/posix-functions/write.texi b/doc/posix-functions/write.texi
index 237a89b146aff6f07fb71f0375f8b75e3e76a1d5..604507d30c7eb5a7ede30e832cd7046af50cdfce 100644 (file)
--- a/doc/posix-functions/write.texi
+++ b/doc/posix-functions/write.texi
@@ -2,12 +2,32 @@
 @section @code{write}
 @findex write
 
-POSIX specification: @url{http://www.opengroup.org/susv3xsh/write.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/write.html}
 
-Gnulib module: ---
+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.
+@item
+When writing to a non-blocking pipe on which no reader is currently waiting
+an amount of bytes that exceeds the pipe buffer's size, then -- even if the
+pipe's buffer is empty -- this function fails, instead of performing a partial
+write into the pipe buffer, 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
+@code{EINVAL}, instead of obeying the current @code{SIGPIPE} handler, on
+some platforms:
+mingw.
 @end itemize
 
 Portability problems not fixed by Gnulib: