From 22a5863afda2aec2bfe0a8b7c889302599ab0241 Mon Sep 17 00:00:00 2001
From: Perry Werneck <perry.werneck@gmail.com>
Date: Mon, 30 Sep 2019 12:38:05 -0300
Subject: [PATCH] Fixing errno use in "has_selection" attribute.

---
 src/include/lib3270.h     | 10 +++++++++-
 src/selection/selection.c |  3 ++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/include/lib3270.h b/src/include/lib3270.h
index b081b1d..af3b97b 100644
--- a/src/include/lib3270.h
+++ b/src/include/lib3270.h
@@ -1066,7 +1066,7 @@
 	 LIB3270_EXPORT const char * lib3270_get_default_charset(void);
 
 	/**
-	 * Get selected area.
+	 * @brief Get selected area.
 	 *
 	 * @param h	Session Handle.
 	 *
@@ -1077,6 +1077,14 @@
 
 	LIB3270_EXPORT char * lib3270_cut_selected(H3270 *hSession);
 
+	/**
+	 * @brief Check if the terminal has selected area (allways sets errno).
+	 *
+	 * @param hSession	Session handle.
+	 *
+	 * @return Non zero if the terminal has selected area, 0 if not.
+	 *
+	 */
 	LIB3270_EXPORT int	  lib3270_has_selection(const H3270 *hSession);
 
 	/**
diff --git a/src/selection/selection.c b/src/selection/selection.c
index 47cf8bf..031a6b4 100644
--- a/src/selection/selection.c
+++ b/src/selection/selection.c
@@ -392,10 +392,11 @@ LIB3270_EXPORT char * lib3270_get_field_string_at(H3270 *session, int baddr)
 
 LIB3270_EXPORT int lib3270_has_selection(const H3270 *hSession)
 {
+	errno = 0;
 	if(check_online_session(hSession))
 		return 0;
 
-	return hSession->selected != 0;
+	return (hSession->selected != 0);
 }
 
 LIB3270_EXPORT int lib3270_get_selection_rectangle(H3270 *hSession, unsigned int *row, unsigned int *col, unsigned int *width, unsigned int *height)
--
libgit2 0.21.2