tree-wide: stop using canonicalize_file_name(), use chase_symlinks() instead

Let's use chase_symlinks() everywhere, and stop using GNU
canonicalize_file_name() everywhere. For most cases this should not change
behaviour, however increase exposure of our function to get better tested. Most
importantly in a few cases (most notably nspawn) it can take the correct root
directory into account when chasing symlinks.

1 files changed, 7 insertions, 6 deletions

diff --git a/src/delta/delta.c b/src/delta/delta.c
index 04de75475d..70ff793304 100644
--- a/src/delta/delta.c
+++ b/src/delta/delta.c
@@ -87,14 +87,15 @@ static enum {
 
 static int equivalent(const char *a, const char *b) {
         _cleanup_free_ char *x = NULL, *y = NULL;
+        int r;
 
-        x = canonicalize_file_name(a);
-        if (!x)
-                return -errno;
+        r = chase_symlinks(a, NULL, &x);
+        if (r < 0)
+                return r;
 
-        y = canonicalize_file_name(b);
-        if (!y)
-                return -errno;
+        r = chase_symlinks(b, NULL, &y);
+        if (r < 0)
+                return r;
 
         return path_equal(x, y);
 }