diff options
| -rw-r--r-- | coreutils/tr.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/coreutils/tr.c b/coreutils/tr.c index 28798fe4f..860b8122b 100644 --- a/coreutils/tr.c +++ b/coreutils/tr.c @@ -135,6 +135,8 @@ static unsigned int expand(const char *arg, char *buffer) /* "[xyz...", i=x, arg points to y */ if (ENABLE_FEATURE_TR_EQUIV && i == '=') { /* [=CHAR=] */ *buffer++ = *arg; /* copy CHAR */ + if (!*arg || arg[1] != '=' || arg[2] != ']') + bb_show_usage(); arg += 3; /* skip CHAR=] */ continue; } |