Fix EPIPE handling in the MinGW build.

4 files changed, 33 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 6822c6f4..e655ebc5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2017-04-08  Eli Zaretskii  <eliz@gnu.org>
+
+	* main.c (usage, copyleft) [__MINGW32__]:
+	* io.c (non_fatal_flush_std_file, close_io) [__MINGW32__]: Call
+	w32_maybe_set_errno to correctly set errno to EPIPE when appropriate.
+
+	* awk.h (die_via_sigpipe) [__MINGW32__]: MinGW-specific definition.
+
 2017-03-27         Arnold D. Robbins     <arnold@skeeve.com>
 
 	Cause EPIPE errors to stdout to generate a real SIGPIPE.
diff --git a/awk.h b/awk.h
index c1e9b4a9..a0af5793 100644
--- a/awk.h
+++ b/awk.h
@@ -1970,5 +1970,10 @@ erealloc_real(void *ptr, size_t count, const char *where, const char *var, const
 #else
 #define ignore_sigpipe()
 #define set_sigpipe_to_default()
+#ifdef __MINGW32__
+/* 0xC0000008 is EXCEPTION_INVALID_HANDLE, somewhat appropriate for EPIPE */
+#define die_via_sigpipe() exit(0xC0000008)
+#else  /* !__MINGW32__ */
 #define die_via_sigpipe() exit(EXIT_FATAL)
+#endif	/* !__MINGW32__ */
 #endif
diff --git a/io.c b/io.c
index b00f4db4..f854ec5a 100644
--- a/io.c
+++ b/io.c
@@ -1399,6 +1399,10 @@ non_fatal_flush_std_file(FILE *fp)
 		bool is_fatal = ! is_non_fatal_std(fp);
 
 		if (is_fatal) {
+#ifdef __MINGW32__
+			if (errno == 0 || errno == EINVAL)
+				w32_maybe_set_errno();
+#endif
 			if (errno == EPIPE)
 				die_via_sigpipe();
 			else
@@ -1494,12 +1498,20 @@ close_io(bool *stdio_problem)
 	*stdio_problem = false;
 	/* we don't warn about stdout/stderr if EPIPE, but we do error exit */
 	if (fflush(stdout) != 0) {
+#ifdef __MINGW32__
+		if (errno == 0 || errno == EINVAL)
+			w32_maybe_set_errno();
+#endif
 		if (errno != EPIPE)
 			warning(_("error writing standard output (%s)"), strerror(errno));
 		status++;
 		*stdio_problem = true;
 	}
 	if (fflush(stderr) != 0) {
+#ifdef __MINGW32__
+		if (errno == 0 || errno == EINVAL)
+			w32_maybe_set_errno();
+#endif
 		if (errno != EPIPE)
 			warning(_("error writing standard error (%s)"), strerror(errno));
 		status++;
diff --git a/main.c b/main.c
index 530d37fd..b6841d57 100644
--- a/main.c
+++ b/main.c
@@ -627,6 +627,10 @@ By default it reads standard input and writes standard output.\n\n"), fp);
 	fflush(fp);
 
 	if (ferror(fp)) {
+#ifdef __MINGW32__
+		if (errno == 0 || errno == EINVAL)
+			w32_maybe_set_errno();
+#endif
 		/* don't warn about stdout/stderr if EPIPE, but do error exit */
 		if (errno == EPIPE)
 			die_via_sigpipe();
@@ -673,6 +677,10 @@ along with this program. If not, see http://www.gnu.org/licenses/.\n");
 	fflush(stdout);
 
 	if (ferror(stdout)) {
+#ifdef __MINGW32__
+		if (errno == 0 || errno == EINVAL)
+			w32_maybe_set_errno();
+#endif
 		/* don't warn about stdout if EPIPE, but do error exit */
 		if (errno != EPIPE)
 			warning(_("error writing standard output (%s)"), strerror(errno));