1 files changed, 27 insertions, 0 deletions
diff --git a/contrib/put_env.h b/contrib/put_env.h
new file mode 100644
index 0000000..0d817b3
--- /dev/null
+++ b/contrib/put_env.h
@@ -0,0 +1,27 @@
+int put_env(const char *string) {
+  unsigned int len, envc, remove=0;
+  char **ep;
+ 
+  len=str_chr(string,'=');
+  if (string[len]==0) remove=1;
+  for (envc=0, ep=environ; *ep; ++ep) {
+    if (!byte_diff(string, len, *ep) && (*ep)[len]=='=') {
+      if (remove) {
+	for (; ep[1]; ++ep) ep[0]=ep[1];
+	ep[0]=0;
+	++env_free;
+	return 0;
+      }
+      *ep=(char *)string;
+      return 0;
+    }
+    ++envc;
+  }
+  if (remove==0) {
+    if (env_free==0) return -1;
+    environ[envc++]=(char*)string;
+    environ[envc]=0;
+    --env_free;
+  }
+  return 0;
+}