1 files changed, 55 insertions, 0 deletions
diff --git a/keyper.c b/keyper.c
new file mode 100644
index 0000000..a3338c3
--- /dev/null
+++ b/keyper.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+static int check_fname(const char* fname)
+{
+  while (*fname) {
+    if (strchr("/.", *(fname++))) {
+      return 0;
+    }
+  }
+  return 1;
+}
+
+static int dump_file(const char* fname)
+{
+  int fd = open(fname, O_RDONLY);
+  if (fd == -1) {
+    fprintf(stderr, "Failed to open %s\n", fname);
+    return 1;
+  }
+  char buf[1024];
+  int buflen;
+  while ((buflen = read(fd, buf, sizeof(buf))) > 0) {
+    write(1, buf, buflen);
+  }
+  close(fd);
+  return 0;
+}
+
+int main(int argc, char** argv)
+{
+  const char* file = getenv("KEYPER_FILE");
+  const char* disable_file = getenv("KEYPER_DISABLE_FILE");
+  
+  if (!disable_file) {
+    disable_file="keyper-disable";
+  }
+
+  if (!file) {
+    fprintf(stderr, "No KEYPER_FILE value.\n");
+    return 1;
+  }
+
+  struct stat statbuf;
+  if (!stat(disable_file, &statbuf)) {
+    fprintf(stderr, "Keyper disabled because %s exists.\n", disable_file);
+    return 127;
+  }
+
+  return dump_file(file);
+}