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From 9dd62525f3b98d692e031f22c02be8f775966503 Mon Sep 17 00:00:00 2001
From: Wayne Davison <wayne@opencoder.net>
Date: Sun, 29 Nov 2020 09:33:54 -0800
Subject: [PATCH] Work around glibc's lchmod() issue a better way.
diff --git a/syscall.c b/syscall.c
index b9c3b4ef..11d10e4a 100644
--- a/syscall.c
+++ b/syscall.c
@@ -227,27 +227,35 @@ int do_open(const char *pathname, int flags, mode_t mode)
#ifdef HAVE_CHMOD
int do_chmod(const char *path, mode_t mode)
{
+ static int switch_step = 0;
int code;
if (dry_run) return 0;
RETURN_ERROR_IF_RO_OR_LO;
+ switch (switch_step) {
#ifdef HAVE_LCHMOD
- code = lchmod(path, mode & CHMOD_BITS);
-#else
- if (S_ISLNK(mode)) {
+#include "case_N.h"
+ if ((code = lchmod(path, mode & CHMOD_BITS)) == 0 || errno != ENOTSUP)
+ break;
+ switch_step++;
+#endif
+
+#include "case_N.h"
+ if (S_ISLNK(mode)) {
# if defined HAVE_SETATTRLIST
- struct attrlist attrList;
- uint32_t m = mode & CHMOD_BITS; /* manpage is wrong: not mode_t! */
+ struct attrlist attrList;
+ uint32_t m = mode & CHMOD_BITS; /* manpage is wrong: not mode_t! */
- memset(&attrList, 0, sizeof attrList);
- attrList.bitmapcount = ATTR_BIT_MAP_COUNT;
- attrList.commonattr = ATTR_CMN_ACCESSMASK;
- code = setattrlist(path, &attrList, &m, sizeof m, FSOPT_NOFOLLOW);
+ memset(&attrList, 0, sizeof attrList);
+ attrList.bitmapcount = ATTR_BIT_MAP_COUNT;
+ attrList.commonattr = ATTR_CMN_ACCESSMASK;
+ code = setattrlist(path, &attrList, &m, sizeof m, FSOPT_NOFOLLOW);
# else
- code = 1;
+ code = 1;
# endif
- } else
- code = chmod(path, mode & CHMOD_BITS); /* DISCOURAGED FUNCTION */
-#endif /* !HAVE_LCHMOD */
+ } else
+ code = chmod(path, mode & CHMOD_BITS); /* DISCOURAGED FUNCTION */
+ break;
+ }
if (code != 0 && (preserve_perms || preserve_executability))
return code;
return 0;
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