-/* $OpenBSD: doas.c,v 1.4 2015/07/16 21:57:54 deraadt Exp $ */
+/* $OpenBSD: doas.c,v 1.5 2015/07/16 22:11:01 nicm Exp $ */
/*
* Copyright (c) 2015 Ted Unangst <tedu@openbsd.org>
*
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+
#include <sys/types.h>
+#include <sys/stat.h>
#include <limits.h>
#include <login_cap.h>
{
extern FILE *yyfp;
extern int yyparse(void);
+ struct stat sb;
yyfp = fopen(filename, "r");
if (!yyfp) {
fprintf(stderr, "doas is not enabled.\n");
exit(1);
}
+
+ if (fstat(fileno(yyfp), &sb) != 0)
+ err(1, "fstat(\"%s\")", filename);
+ if ((sb.st_mode & (S_IWGRP|S_IWOTH)) != 0)
+ errx(1, "%s is writable by group or other", filename);
+ if (sb.st_uid != 0)
+ errx(1, "%s is not owned by root", filename);
+
yyparse();
fclose(yyfp);
}