Convert argv[0] to lowercase before checking for '.exe'

1 files changed, 8 insertions, 5 deletions

diff --git a/libbb/appletlib.c b/libbb/appletlib.c
index 14b21f827..5425f736e 100644
--- a/libbb/appletlib.c
+++ b/libbb/appletlib.c
@@ -834,13 +834,16 @@ int main(int argc UNUSED_PARAM, char **argv)
                         unsetenv("BUSYBOX_APPLET_NAME");
                 }
                 else {
-                        int i, len = strlen(applet_name);
-                        if (len > 4 && !strcmp(applet_name+len-4, ".exe")) {
+                        char *s = argv[0];
+                        int i, len = strlen(s);
+
+                        for ( i=0; i < len; ++i ) {
+                                s[i] = tolower(s[i]);
+                        }
+                        if (len > 4 && !strcmp(s+len-4, ".exe")) {
                                 len -= 4;
-                                argv[0][applet_name-argv[0]+len] = '\0';
+                                s[len] = '\0';
                         }
-                        for (i = 0; i < len; i++)
-                                argv[0][applet_name-argv[0]+i] = tolower(applet_name[i]);
                 }
         }
         applet_name = bb_basename(applet_name);