ramfs: fix truncfile() for non multiple of extend size (64k)

The calculation of the last block size is wrong and we can
only shrink the size of the last data block, not extend it.

diff --git a/sys/src/cmd/ramfs.c b/sys/src/cmd/ramfs.c
index 85bbe9e318ab6b1fd0aa50648885081bcbb3012b..90f1225e84a6080eab787ee4cb2a0063265dc202 100644 (file)
--- a/sys/src/cmd/ramfs.c
+++ b/sys/src/cmd/ramfs.c
@@ -249,7 +249,8 @@ truncfile(File *f, vlong l)
                if(i < n){
                        o = l % ESIZE;
                        if(o != 0 && x->ent[i] != nil){
-                               x->ent[i]->size = o * sizeof(Ram*);
+                               if(o < x->ent[i]->size)
+                                       x->ent[i]->size = o;
                                i++;
                        }
                        while(i < n){