abstract out "forced" implementations of functions from future specifications

1 files changed, 9 insertions, 1 deletions

diff --git a/src/stdlib/getenv.c b/src/stdlib/getenv.c
index 989a5f84..c85c1922 100644
--- a/src/stdlib/getenv.c
+++ b/src/stdlib/getenv.c
@@ -1,6 +1,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "_stdlib.h"
+#include "_readonly.h"
 
 /** get an environment variable **/
 
@@ -8,13 +9,20 @@ char * getenv(const char * name)
 {
 	size_t len = 0;
 	size_t i = 0;
+	static char *variable = NULL;
 
 	SIGNAL_SAFE(0);
+	if (variable == NULL) {
+		variable = __readonly(RO_ALLOC, "getenv");
+	}
 
 	len = strlen(name);
 	for (i = 0; environ[i] != NULL; i++) {
 		if (!strncmp(environ[i], name, len) && environ[i][len] == '=') {
-			return environ[i] + len + 1;
+			__readonly(RO_UNLOCK, variable);
+			strcpy(variable, environ[i] + len + 1);
+			__readonly(RO_LOCK, variable);
+			return variable;
 		}
 	}