add aliases == and [[ for = and [ to support more bash scripts

1 files changed, 7 insertions, 1 deletions

diff --git a/coreutils/test.c b/coreutils/test.c
index 8fa6d166f..cec3c471d 100644
--- a/coreutils/test.c
+++ b/coreutils/test.c
@@ -51,7 +51,7 @@
         unary-operator ::= "-r"|"-w"|"-x"|"-f"|"-d"|"-c"|"-b"|"-p"|
                 "-u"|"-g"|"-k"|"-s"|"-t"|"-z"|"-n"|"-o"|"-O"|"-G"|"-L"|"-S";
 
-        binary-operator ::= "="|"!="|"-eq"|"-ne"|"-ge"|"-gt"|"-le"|"-lt"|
+        binary-operator ::= "="|"=="|"!="|"-eq"|"-ne"|"-ge"|"-gt"|"-le"|"-lt"|
                         "-nt"|"-ot"|"-ef";
         operand ::= <any legal UNIX file name>
 */
@@ -135,6 +135,7 @@ static const struct t_op {
         "-L", FILSYM, UNOP}, {
         "-S", FILSOCK, UNOP}, {
         "=", STREQ, BINOP}, {
+        "==", STREQ, BINOP}, {
         "!=", STRNE, BINOP}, {
         "<", STRLT, BINOP}, {
         ">", STRGT, BINOP}, {
@@ -191,6 +192,11 @@ extern int test_main(int argc, char **argv)
                         bb_error_msg_and_die("missing ]");
                 argv[argc] = NULL;
         }
+        if (strcmp(bb_applet_name, "[[") == 0) {
+                if (strcmp(argv[--argc], "]]"))
+                        bb_error_msg_and_die("missing ]]");
+                argv[argc] = NULL;
+        }
         /* Implement special cases from POSIX.2, section 4.62.4 */
         switch (argc) {
         case 1: