nix: init

1 files changed, 42 insertions, 0 deletions

diff --git a/src/nix.c b/src/nix.c
new file mode 100644
index 0000000..f1b3a5a
--- /dev/null
+++ b/src/nix.c
@@ -0,0 +1,42 @@
+#include <errno.h>
+#include <string.h>
+
+#include "nix.h"
+#include "util.h"
+
+void _nix_get_string_strdup(const char *str, unsigned n, void *user_data)
+{
+	char **s = user_data;
+
+	*s = strndup(str, n);
+	if (*s == NULL)
+		print_err("%s", strerror(errno));
+}
+
+int _nix_init(nix_c_context **nix_ctx)
+{
+	nix_err nix_ret;
+	nix_c_context *nc;
+	int ret = 0;
+
+	nc = nix_c_context_create();
+	if (nix_ctx == NULL) {
+		print_err("%s", "Failed to create nix context");
+		return -EPERM;
+	}
+
+	nix_ret = nix_libstore_init(nc);
+	if (nix_ret != NIX_OK) {
+		print_err("%s", nix_err_msg(NULL, nc, NULL));
+		ret = -EPERM;
+		goto out_free_nc;
+	}
+
+out_free_nc:
+	if (ret < 0)
+		nix_c_context_free(nc);
+	else
+		*nix_ctx = nc;
+
+	return ret;
+}