Add stop

1 files changed, 40 insertions, 0 deletions

diff --git a/destroy.c b/destroy.c
new file mode 100644
index 0000000..02355f0
--- /dev/null
+++ b/destroy.c
@@ -0,0 +1,40 @@
+/* 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 <sysexits.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[]) {
+    if (argc < 2) errx(EX_USAGE, "missing private id");
+
+    int fd = open("private", 0);
+    if (fd < 0) err(EX_NOINPUT, "private");
+
+    const char *private = argv[1];
+    char public[10 + 32 + 1] = {0};
+    ssize_t n = readlinkat(fd, private, public, sizeof(public) - 1);
+    if (n < 0) err(EX_NOINPUT, "%s", private);
+
+    int error = unlinkat(fd, public, 0);
+    if (error) err(EX_NOINPUT, "%s", public);
+
+    error = unlinkat(fd, private, 0);
+    if (error) err(EX_NOINPUT, "%s", private);
+
+    return EX_OK;
+}