From: Mark Wooding <mdw@distorted.org.uk>
Date: Tue, 16 Jul 2024 13:01:40 +0000 (+0100)
Subject: checkpath.c: Mark the `root' node explicitly as constant.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/checkpath/commitdiff_plain/822843636382a01a10f4c7c6eb704ef2ec5218ad?ds=sidebyside

checkpath.c: Mark the `root' node explicitly as constant.

It never actually changes, but this isn't clear from the typing.
---

diff --git a/checkpath.c b/checkpath.c
index 4cf5181..5d77b18 100644
--- a/checkpath.c
+++ b/checkpath.c
@@ -68,7 +68,7 @@ struct elt {
 
 /*----- Static variables --------------------------------------------------*/
 
-static struct elt rootnode = { 0, 0, 0 }; /* Root of the list */
+static const struct elt rootnode = { 0, 0, 0 }; /* Root of the list */
 static struct elt *sp;			/* Stack pointer for list */
 static dstr d = DSTR_INIT;		/* Current path string */
 
@@ -353,7 +353,7 @@ unsigned checkpath(const char *p, const struct checkpath *cp)
 
   /* --- Initialize stack pointer and path string --- */
 
-  sp = &rootnode;
+  sp = (/*unconst*/ struct elt *)&rootnode;
   dstr_destroy(&d);
 
   /* --- Try to find the current directory --- */