single_transfer: ignore blank --output-dir

... as otherwise it creates a rather unexpected target directory with a
leading slash.

Reported-by: Harry Sintonen
Fixes #7218
Closes #7233

diff --git a/src/tool_operate.c b/src/tool_operate.c
index 8fb0ef2e7cd84ca44a7e273fbffd6db274050f14..3c580ffaeaca49b987b9473f7bcafd3034db667f 100644 (file)
--- a/src/tool_operate.c
+++ b/src/tool_operate.c
@@ -970,7 +970,7 @@ static CURLcode single_transfer(struct GlobalConfig *global,
             }
           }
 
-          if(config->output_dir) {
+          if(config->output_dir && *config->output_dir) {
             char *d = aprintf("%s/%s", config->output_dir, per->outfile);
             if(!d) {
               result = CURLE_WRITE_ERROR;