tests: search for netcat binary

Signed-off-by: Aris Adamantiadis <aris@0xbadc0de.be>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

tests/client/torture_proxycommand.c

@@ -59,6 +59,7 @@ static int session_teardown(void **state)
     return 0;
 }
 
+#ifdef NC_EXECUTABLE
 static void torture_options_set_proxycommand(void **state)
 {
     struct torture_state *s = *state;
@@ -70,13 +71,13 @@ static void torture_options_set_proxycommand(void **state)
     int rc;
     socket_t fd;
 
-    rc = stat("/bin/nc", &sb);
+    rc = stat(NC_EXECUTABLE, &sb);
     if (rc != 0 || (sb.st_mode & S_IXOTH) == 0) {
-        SSH_LOG(SSH_LOG_WARNING, "Could not find /bin/nc: Skipping the test");
+        SSH_LOG(SSH_LOG_WARNING, "Could not find " NC_EXECUTABLE ": Skipping the test");
         skip();
     }
 
-    rc = snprintf(command, sizeof(command), "/bin/nc %s %d", address, port);
+    rc = snprintf(command, sizeof(command), NC_EXECUTABLE " %s %d", address, port);
     assert_true((size_t)rc < sizeof(command));
 
     rc = ssh_options_set(session, SSH_OPTIONS_PROXYCOMMAND, command);
@@ -89,6 +90,16 @@ static void torture_options_set_proxycommand(void **state)
     assert_int_equal(rc & O_RDWR, O_RDWR);
 }
 
+#else /* NC_EXECUTABLE */
+
+static void torture_options_set_proxycommand(void **state)
+{
+    (void) state;
+    skip();
+}
+
+#endif /* NC_EXECUTABLE */
+
 static void torture_options_set_proxycommand_notexist(void **state) {
     struct torture_state *s = *state;
     ssh_session session = s->ssh.session;

tests/tests_config.h.cmake

@@ -61,3 +61,7 @@
 #cmakedefine OPENSSH_ECDSA_SHA2_NISTP256_CERT_V01_OPENSSH_COM 1
 #cmakedefine OPENSSH_ECDSA_SHA2_NISTP384_CERT_V01_OPENSSH_COM 1
 #cmakedefine OPENSSH_ECDSA_SHA2_NISTP521_CERT_V01_OPENSSH_COM 1
+
+/* Available programs */
+
+#cmakedefine NC_EXECUTABLE "${NC_EXECUTABLE}"

tests/torture.h

@@ -41,6 +41,7 @@
 #include <cmocka.h>
 
 #include "torture_cmocka.h"
+#include "tests_config.h"
 
 #ifndef assert_return_code
 /* hack for older versions of cmocka */