Avoid spurious errors by re-setting errno to 0 before calling that readdir()

Resolves: rhbz#1204139
- Add a patch to support compiling on Linux 4.*

postfix-3.0.1-linux4.patch

@@ -0,0 +1,19 @@
+This patch allows the postfix build system to accept building on Linux 4.*
+
+Even for Linux 4.x systems, it sets SYSTYPE variable to Linux3 because
+I am not sure if I'd have to change other part of the build system to
+make it cope with the new Linux 4.x.  I guess I'll try in subsequent
+patch to set the SYSTYPE properly and see what breaks.  For now, this
+seems to work.
+
+--- postfix-3.0.1/makedefs	2015-04-26 19:07:31.924108509 +0200
++++ postfix-3.0.1/makedefs.dodji	2015-04-26 19:06:22.678638335 +0200
+@@ -500,7 +500,7 @@
+ 		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
+ 		: ${PLUGIN_LD="${CC-gcc} -shared"}
+ 		;;
+-    Linux.3*)	SYSTYPE=LINUX3
++    Linux.3*|Linux.4*)	SYSTYPE=LINUX3
+ 		case "$CCARGS" in
+ 		 *-DNO_DB*) ;;
+ 		 *-DHAS_DB*) ;;

postfix-3.0.1-reset-errno-before-readdir.patch

@@ -0,0 +1,22 @@
+This patch comes from Mika Ilmaranta who attched it to the bug
+https://bugzilla.redhat.com/show_bug.cgi?id=1204139.
+
+--- postfix-3.0.1/src/util/scan_dir.c	2015-04-21 20:44:19.985338673 +0300
++++ postfix-3.0.1/src/util/scan_dir.c.reset-errno-before-readdir	2015-04-21 20:47:32.791855824 +0300
+@@ -78,6 +78,7 @@ 
+ #endif
+ #endif
+ #include <string.h>
++#include <errno.h>
+ 
+ /* Utility library. */
+ 
+@@ -177,6 +178,8 @@ char   *scan_dir_next(SCAN_DIR *scan)
+ #define STREQ(x,y)	(strcmp((x),(y)) == 0)
+ 
+     if (info) {
++	/* Some implementations report spurious errors. */
++	errno = 0;
+ 	while ((dp = readdir(info->dir)) != 0) {
+ 	    if (STREQ(dp->d_name, ".") || STREQ(dp->d_name, "..")) {
+ 		if (msg_verbose > 1)

postfix.spec

@@ -42,7 +42,7 @@
 Name: postfix
 Summary: Postfix Mail Transport Agent
 Version: 3.0.1
-Release: 1%{?dist}
+Release: 2%{?dist}
 Epoch: 2
 Group: System Environment/Daemons
 URL: http://www.postfix.org
@@ -84,7 +84,12 @@ Source101: postfix-pam.conf
 Patch1: postfix-3.0.0-config.patch
 Patch2: postfix-3.0.0-files.patch
 Patch3: postfix-3.0.0-alternatives.patch
-Patch8: postfix-3.0.0-large-fs.patch
+Patch4: postfix-3.0.0-large-fs.patch
+# The patch below make the package compile on Linux 4.xx
+Patch5: postfix-3.0.1-linux4.patch
+# The patch below resets the global errno variable to 0 before calling
+# readdir(). This seems to fix bug rhbz#1204139
+Patch6: postfix-3.0.1-reset-errno-before-readdir.patch
 Patch9: pflogsumm-1.1.3-datecalc.patch
 
 # Optional patches - set the appropriate environment variables to include
@@ -208,7 +213,9 @@ maps with Postfix, you need this.
 %patch1 -p1 -b .config
 %patch2 -p1 -b .files
 %patch3 -p1 -b .alternatives
-%patch8 -p1 -b .large-fs
+%patch4 -p1 -b .large-fs
+%patch5 -p1 -b .linux4
+%patch6 -p1 -b .reset-errno-before-readdir
 
 # Change DEF_SHLIB_DIR according to build host
 sed -i \
@@ -728,6 +735,11 @@ rm -rf $RPM_BUILD_ROOT
 %endif
 
 %changelog
+* Sun Apr 26 2015 Dodji Seketeli <dodji@seketeli.org> - 2:3.0.1-2
+- Avoid spurious errors by re-setting errno to 0 before calling that readdir()
+  Resolves: rhbz#1204139
+- Add a patch to support compiling on Linux 4.*
+
 * Mon Apr 13 2015 Jaroslav Škarvada <jskarvad@redhat.com> - 2:3.0.1-1
 - New version