main/fortify-headers: fix realpath()

ref #4075

main/fortify-headers/0001-fix-realpath-when-stdlib.h-is-included-before-limits.patch

+From 31d62b60c5b4f1baa795537da898a83e39be9dd1 Mon Sep 17 00:00:00 2001
+From: Natanael Copa <ncopa@alpinelinux.org>
+Date: Thu, 7 May 2015 14:41:36 +0200
+Subject: [PATCH fortify-headers] fix realpath when stdlib.h is included before
+ limits.h
+To: sin@2f30.org
+
+If program includes stdlib.h before limits.h without _XOPEN_SOURCE,
+_GNU_SOURCE or _BSD_SOURCE explicitly set, then will it always trigger
+the trap with musl libc.
+
+This is becase stdlib.h will pull in features.h which will set
+_GNU_SOURCE. This means that the fortify stdlib.h will not include
+limits.h but it will still trigger the fortified realpath(), but without
+PATH_MAX set.
+
+We fix this by including system stdlib.h before testing if limits.h
+should be included.
+
+Since PATH_MAX is known at compile time we can also error at compile
+time, instead of compiling a broken realpath().
+---
+ include/stdlib.h | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/include/stdlib.h b/include/stdlib.h
+index 22f1f2b..6629652 100644
+--- a/include/stdlib.h
++++ b/include/stdlib.h
+@@ -1,12 +1,12 @@
+ #ifndef _FORTIFY_STDLIB_H
+ #define _FORTIFY_STDLIB_H
+ 
++#include_next <stdlib.h>
++
+ #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+ #include_next <limits.h>
+ #endif
+ 
+-#include_next <stdlib.h>
+-
+ #if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
+ 
+ #ifdef __cplusplus
+@@ -23,7 +23,7 @@ char *realpath(const char *path, char *resolved)
+ 
+ 	if (resolved) {
+ #ifndef PATH_MAX
+-		__builtin_trap();
++# error PATH_MAX unset. A fortified realpath will not work.
+ #else
+ 		bos = __builtin_object_size(resolved, 0);
+ 		if (PATH_MAX > bos)
+-- 
+2.4.0
+

main/fortify-headers/APKBUILD

@@ -2,7 +2,7 @@
 # Maintainer: Timo Teräs <timo.teras@iki.fi>
 pkgname=fortify-headers
 pkgver=0.4
-pkgrel=0
+pkgrel=1
 pkgdesc="standalone fortify source implementation"
 url="http://git.2f30.org/fortify-headers/"
 arch="noarch"
@@ -13,6 +13,7 @@ makedepends="$depends_dev"
 install=""
 subpackages=""
 source="http://dl.2f30.org/releases/$pkgname-$pkgver.tar.gz
+	0001-fix-realpath-when-stdlib.h-is-included-before-limits.patch
 	"
 
 _builddir="$srcdir"/$pkgname-$pkgver
@@ -36,6 +37,9 @@ package() {
 	rm -f "$pkgdir"/usr/lib/*.la
 }
 
-md5sums="99b34bbd925cbfe383252fe107cafece  fortify-headers-0.4.tar.gz"
-sha256sums="fedfbd951bf4d4bd30d32bef20710d6124c004037df52059a274c090c1f11a0a  fortify-headers-0.4.tar.gz"
-sha512sums="669bf35df5278d4557caa2c8f28e33fe3e4a03c4267eed2cc8638dcb8e705d8797e487fbb524d9ff919e2752f1dc817cef9d41f14ceb46d520661e3d2301c5f2  fortify-headers-0.4.tar.gz"
+md5sums="99b34bbd925cbfe383252fe107cafece  fortify-headers-0.4.tar.gz
+47e6831fc0fa84075f5750b47b13d888  0001-fix-realpath-when-stdlib.h-is-included-before-limits.patch"
+sha256sums="fedfbd951bf4d4bd30d32bef20710d6124c004037df52059a274c090c1f11a0a  fortify-headers-0.4.tar.gz
+1216858e96afa30b093ec420d0b6d8943036d8816f54a59e3fa6ef5b5b0ee32e  0001-fix-realpath-when-stdlib.h-is-included-before-limits.patch"
+sha512sums="669bf35df5278d4557caa2c8f28e33fe3e4a03c4267eed2cc8638dcb8e705d8797e487fbb524d9ff919e2752f1dc817cef9d41f14ceb46d520661e3d2301c5f2  fortify-headers-0.4.tar.gz
+5364518842709e2c25baaf9a8b7651db422f2d37c64fac690f671daa157214192933ac1821a29d31d8ddfd49dd8e2625e3dfbe6fdba3b2b899c533f0f73e4699  0001-fix-realpath-when-stdlib.h-is-included-before-limits.patch"