Add stop

1 files changed, 49 insertions, 0 deletions

diff --git a/create.c b/create.c
new file mode 100644
index 0000000..49cadb6
--- /dev/null
+++ b/create.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 2018  Causal Agent June <june@causal.agency>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <err.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[]) {
+    if (argc < 2) errx(EX_USAGE, "missing public id");
+
+    uint32_t id[4];
+    char public[10 + 32 + 1];
+    char private[8 + 32 + 1];
+
+    arc4random_buf(id, sizeof(id));
+    snprintf(public, sizeof(public), "public/%s", argv[1]);
+    snprintf(
+        private, sizeof(private),
+        "private/%08x%08x%08x%08x",
+        id[0], id[1], id[2], id[3]
+    );
+
+    int fd = open(public, O_CREAT | O_EXCL, 0644);
+    if (fd < 0) err(EX_CANTCREAT, "%s", public);
+
+    snprintf(public, sizeof(public), "../public/%s", argv[1]);
+    int error = symlink(public, private);
+    if (error) err(EX_CANTCREAT, "%s", private);
+
+    printf("%08x%08x%08x%08x\n", id[0], id[1], id[2], id[3]);
+    return EX_OK;
+}