[Libosinfo] [osinfo-db-tools PATCH 1/3] import: Don't call unlink(NULL)

[Fabiano Fidêncio]

Although `man 3 unlink` doesn't mention what should be the unlink()
behaviour when NULL is passed to it, both coverity and clang complains
about that.

Error: FORWARD_NULL (CWE-476):
osinfo-db-tools-1.5.0/tools/osinfo-db-import.c:157: var_compare_op:
Comparing "*source_file" to null implies that "*source_file" might be
null.
osinfo-db-tools-1.5.0/tools/osinfo-db-import.c:181: var_deref_model:
Passing null pointer "*source_file" to "unlink", which dereferences it.
 #  179|           g_error_free(err);
 #  180|       if (ret != 0)
 #  181|->         unlink(*source_file);
 #  182|
 #  183|       return ret;

Error: CLANG_WARNING:
osinfo-db-tools-1.5.0/tools/osinfo-db-import.c:181:9: warning: Null
pointer passed as an argument to a 'nonnull' parameter
 #        unlink(*source_file);
 #        ^

Signed-off-by: Fabiano Fidêncio <fidencio at redhat.com>
---
 tools/osinfo-db-import.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/osinfo-db-import.c b/tools/osinfo-db-import.c
index 920f71b..11e68ae 100644
--- a/tools/osinfo-db-import.c
+++ b/tools/osinfo-db-import.c
@@ -177,7 +177,7 @@ osinfo_db_import_download_file(GFile *file,
         g_object_unref(out);
     if (err != NULL)
         g_error_free(err);
-    if (ret != 0)
+    if (ret != 0 && *source_file != NULL)
         unlink(*source_file);
 
     return ret;
-- 
2.21.0