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From 99b84a793669c69acc705a61d339441b50bd09a8 Mon Sep 17 00:00:00 2001
From: Natanael Copa <ncopa@alpinelinux.org>
Date: Wed, 13 Jan 2021 14:28:35 +0100
Subject: [PATCH] realpath: replace leading // with a single /

On some systems a leading double slash may have special meaning, so
POSIX[1] says that "If a pathname begins with two successive <slash>
characters, the first component following the leading <slash> characters
may be interpreted in an implementation-defined manner"

While current musl implementation is technically correct, most other
systems' (at least GNU libc, freebsd, openbsd, netbsd macOS)
implementations will replace a leading // with a single /. Make musl
do the same to avoid surprises.

[1]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13
---
 src/misc/realpath.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/misc/realpath.c b/src/misc/realpath.c
index db8b74dc..414b4741 100644
--- a/src/misc/realpath.c
+++ b/src/misc/realpath.c
@@ -46,9 +46,6 @@ restart:
 			q=0;
 			output[q++] = '/';
 			p++;
-			/* Initial // is special. */
-			if (stack[p] == '/' && stack[p+1] != '/')
-				output[q++] = '/';
 			continue;
 		}
 
-- 
2.29.2