depmod: add asserts to ensure positive return from ftell()

Also ignore some errors that will later be returned by ferror().

diff --git a/tools/depmod.c b/tools/depmod.c
index 851af0c..231b9ab 100644 (file)
--- a/tools/depmod.c
+++ b/tools/depmod.c
@@ -407,6 +407,7 @@ static void index_write(const struct index_node *node, FILE *out)
 
        /* Second word is reserved for the offset of the root node */
        initial_offset = ftell(out);
+       assert(initial_offset >= 0);
        u = 0;
        fwrite(&u, sizeof(uint32_t), 1, out);
 
@@ -415,9 +416,10 @@ static void index_write(const struct index_node *node, FILE *out)
 
        /* Update first word */
        final_offset = ftell(out);
-       fseek(out, initial_offset, SEEK_SET);
+       assert(final_offset >= 0);
+       (void)fseek(out, initial_offset, SEEK_SET);
        fwrite(&u, sizeof(uint32_t), 1, out);
-       fseek(out, final_offset, SEEK_SET);
+       (void)fseek(out, final_offset, SEEK_SET);
 }
 
 /* END: code from module-init-tools/index.c just modified to compile here.