Initial commit

env.c

@@ -0,0 +1,40 @@
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <errno.h>
+#include "env.h"
+
+static char base[4096];
+
+static void get_base() {
+
+	char *ptr;
+	int len;
+
+	ptr = getenv("HOME");
+	if (!ptr)
+		ptr = ".";
+
+	len = strlen(ptr);
+	if (len < sizeof(base) - 9) {
+		memcpy(base, ptr, len);
+		memcpy(base+len, "/.dlight", 9);
+	}
+}
+
+const char* env_get_dir() {
+
+	if (!*base) {
+		get_base();
+		if (mkdir(base, 0700) < 0 && errno != EEXIST) {
+			fprintf(stderr, "unable to create '%s': %s\n",
+				base, strerror(errno));
+			exit(1);
+		}
+	}
+	return base;
+}