From: Lucas De Marchi <lucas.demarchi@intel.com>
Date: Fri, 4 Apr 2014 11:19:00 +0000 (-0300)
Subject: Add strndupa to missing.h
X-Git-Tag: v18~23
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=04c0956e207e3b27a700494f8dc77f902cd53731;p=platform%2Fupstream%2Fkmod.git

Add strndupa to missing.h
---

diff --git a/configure.ac b/configure.ac
index 579d981..4040908 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,6 +50,9 @@ AC_CHECK_FUNCS_ONCE([finit_module])
 # dietlibc doesn't have st.st_mtim struct member
 AC_CHECK_MEMBERS([struct stat.st_mtim], [], [], [#include <sys/stat.h>])
 
+# musl 1.0 and bionic 4.4 don't have strndupa
+AC_CHECK_DECLS_ONCE([strndupa])
+
 # Check kernel headers
 AC_CHECK_HEADERS_ONCE([linux/module.h])
 
diff --git a/libkmod/missing.h b/libkmod/missing.h
index b45bbe2..a286446 100644
--- a/libkmod/missing.h
+++ b/libkmod/missing.h
@@ -32,3 +32,11 @@ static inline int finit_module(int fd, const char *uargs, int flags)
 	return syscall(__NR_finit_module, fd, uargs, flags);
 }
 #endif
+
+#if !HAVE_DECL_STRNDUPA
+#define strndupa(s, length) \
+	({ \
+		size_t __len = strnlen((s), (length)); \
+		strncpy(alloca(__len + 1), (s), __len);  \
+	 })
+#endif