moved AFL_TMPDIR check further down and better error message

1 files changed, 20 insertions, 19 deletions

diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index 1feb96be..740fb5cb 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -654,25 +654,6 @@ int main(int argc, char** argv, char** envp) {
   if (!strcmp(in_dir, out_dir))
     FATAL("Input and output directories can't be the same");
 
-  if ((tmp_dir = getenv("AFL_TMPDIR")) != NULL && !in_place_resume) {
-
-    char tmpfile[file_extension 
-         ? strlen(tmp_dir) + 1 + 10 + 1 + strlen(file_extension) + 1
-         : strlen(tmp_dir) + 1 + 10 + 1];
-    if (file_extension) {
-      sprintf(tmpfile, "%s/.cur_input.%s", tmp_dir, file_extension);
-    } else {
-      sprintf(tmpfile, "%s/.cur_input", tmp_dir);
-    }
-    if (access(tmpfile, F_OK) !=
-        -1)  // there is still a race condition here, but well ...
-      FATAL("AFL_TMPDIR already has an existing temporary input file: %s",
-            tmpfile);
-
-  } else
-
-    tmp_dir = out_dir;
-
   if (dumb_mode) {
 
     if (crash_mode) FATAL("-C and -n are mutually exclusive");
@@ -846,6 +827,26 @@ int main(int argc, char** argv, char** envp) {
 
   if (!timeout_given) find_timeout();
 
+  if ((tmp_dir = getenv("AFL_TMPDIR")) != NULL && !in_place_resume) {
+
+    char tmpfile[file_extension 
+         ? strlen(tmp_dir) + 1 + 10 + 1 + strlen(file_extension) + 1
+         : strlen(tmp_dir) + 1 + 10 + 1];
+    if (file_extension) {
+      sprintf(tmpfile, "%s/.cur_input.%s", tmp_dir, file_extension);
+    } else {
+      sprintf(tmpfile, "%s/.cur_input", tmp_dir);
+    }
+    if (access(tmpfile, F_OK) !=
+        -1)  // there is still a race condition here, but well ...
+      FATAL("AFL_TMPDIR already has an existing temporary input file: %s - if this is not from another instance, then just remove the file.",
+            tmpfile);
+
+  } else
+
+    tmp_dir = out_dir;
+
+
   /* If we don't have a file name chosen yet, use a safe default. */
 
   if (!out_file) {