1 files changed, 73 insertions, 0 deletions
diff --git a/.local/bin/autobuild.c b/.local/bin/autobuild.c
new file mode 100644
index 0000000..3805e19
--- /dev/null
+++ b/.local/bin/autobuild.c
@@ -0,0 +1,73 @@
+/* Just a "stupid", secure SUID wrapper around autobuild.sh */
+/* Copyright (C) 2014 Luke Shumaker <lukeshu@sbcglobal.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define _GNU_SOURCE /* for environment functions */
+#include <alloca.h> /* for alloca(3) */
+#include <errno.h> /* for errno */
+#include <error.h> /* for error(3) */
+#include <pwd.h> /* for getpwuid(3) */
+#include <stdlib.h> /* for environment functions */
+#include <string.h> /* for strlen(3), strcpy(3) */
+#include <unistd.h> /* for geteuid(3), execv(3) */
+
+void
+mysetenv(const char *name, const char *value)
+{
+	if (value != NULL) {
+		if (setenv(name, value, 1) != 0) {
+			error(127, errno, "could not set %s", name);
+		}
+	}
+}
+
+int
+main(int argc, char **argv)
+{
+	struct passwd *user = getpwuid(geteuid());
+	setreuid(geteuid(), -1);
+
+	const char *env_term        = getenv("TERM");
+	const char *env_lang        = getenv("LANG");
+	const char *env_lc_all      = getenv("LC_ALL");
+	const char *env_lc_collate  = getenv("LC_COLLATE");
+	const char *env_lc_ctype    = getenv("LC_CTIME");
+	const char *env_lc_messages = getenv("LC_MESSAGES");
+	const char *env_lc_monetary = getenv("LC_MONETARY");
+	const char *env_lc_numeric  = getenv("LC_NUMERIC");
+	const char *env_lc_time     = getenv("LC_TIME");
+	clearenv();
+	mysetenv("USER"       , user->pw_name  );
+	mysetenv("LOGNAME"    , user->pw_name  );
+	mysetenv("HOME"       , user->pw_dir   );
+	mysetenv("TERM"       , env_term       );
+	mysetenv("LANG"       , env_lang       );
+	mysetenv("LC_ALL"     , env_lc_all     );
+	mysetenv("LC_COLLATE" , env_lc_collate );
+	mysetenv("LC_CTIME"   , env_lc_ctype   );
+	mysetenv("LC_MESSAGES", env_lc_messages);
+	mysetenv("LC_MONETARY", env_lc_monetary);
+	mysetenv("LC_NUMERIC" , env_lc_numeric );
+	mysetenv("LC_TIME"    , env_lc_time    );
+
+	const char *script_suffix = "/.local/bin/autobuild.sh";
+	char *script = alloca(strlen(user->pw_dir)+strlen(script_suffix));
+	strcpy(script, user->pw_dir);
+	strcpy(&(script[strlen(user->pw_dir)]), script_suffix);
+
+	execv(script, argv);
+	error(127, errno, "%s", script);
+}