HAVE_WRITABLE_ARGV is set if argv[] is writable on the system, and then

we attempt to hide some of the more sensitive command line arguments

1 files changed, 16 insertions, 0 deletions

diff --git a/configure.in b/configure.in
index 43a6678d8..9542f00d6 100644
--- a/configure.in
+++ b/configure.in
@@ -319,6 +319,22 @@ if test -n "$RANDOM_FILE" ; then
 fi
 
 dnl **********************************************************************
+dnl Check if the operating system allows programs to write to their own argv[]
+dnl **********************************************************************
+
+AC_MSG_CHECKING([if argv can be written to])
+AC_TRY_RUN([
+int main(int argc, char ** argv) {
+	argv[0][0] = ' ';
+	return (argv[0][0] == ' ')?0:1;
+}
+	],
+	AC_DEFINE(HAVE_WRITABLE_ARGV, 1, [Define this symbol if your OS supports changing the contents of argv])
+	AC_MSG_RESULT(yes),
+	AC_MSG_RESULT(no)
+)
+
+dnl **********************************************************************
 dnl Check for the presence of Kerberos4 libraries and headers
 dnl **********************************************************************