snprintf: guarantee %1$d, for libintl

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

diff --git a/doc/posix-functions/write.texi b/doc/posix-functions/write.texi
index 826151c9eea28edbfdb07dfc5ab0f988d9cc4784..e1059173399861fd7252e55b5557b300b4951813 100644 (file)
--- a/doc/posix-functions/write.texi
+++ b/doc/posix-functions/write.texi
@@ -4,9 +4,24 @@
 
 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.
+@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
@@ -17,4 +32,11 @@ mingw.
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+This function may fail with error @code{EINTR}, even in programs that don't
+install any signal handlers, on some platforms:
+MacOS X 10.5.
 @end itemize
+
+For handling @code{EINTR}, Gnulib provides a module @samp{safe-write} with a
+function @code{safe_write}.