[src/trunk]: src/usr.bin/make Main_SetObjdir is first called for curdir which...

[sjg <sjg%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/86e459205706
branches:  trunk
changeset: 1015770:86e459205706
user:      sjg <sjg%NetBSD.org@localhost>
date:      Sat Oct 31 21:09:22 2020 +0000

description:
Main_SetObjdir is first called for curdir which may be readonly

Skip access check if path is curdir.
This ensures that all proper initialization is done at least once.

If path is not curdir it should be writable to be useful.

Reviewed by: rillig

diffstat:

 usr.bin/make/main.c |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (29 lines):

diff -r a67c99aab526 -r 86e459205706 usr.bin/make/main.c
--- a/usr.bin/make/main.c       Sat Oct 31 20:30:06 2020 +0000
+++ b/usr.bin/make/main.c       Sat Oct 31 21:09:22 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: main.c,v 1.419 2020/10/31 16:13:00 rillig Exp $        */
+/*     $NetBSD: main.c,v 1.420 2020/10/31 21:09:22 sjg Exp $   */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -118,7 +118,7 @@
 #include "trace.h"
 
 /*     "@(#)main.c     8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: main.c,v 1.419 2020/10/31 16:13:00 rillig Exp $");
+MAKE_RCSID("$NetBSD: main.c,v 1.420 2020/10/31 21:09:22 sjg Exp $");
 #if defined(MAKE_NATIVE) && !defined(lint)
 __COPYRIGHT("@(#) Copyright (c) 1988, 1989, 1990, 1993 "
            "The Regents of the University of California.  "
@@ -721,7 +721,9 @@
 
        /* look for the directory and try to chdir there */
        if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
-               if (chdir(path)) {
+               /* if not .CURDIR it must be writable */
+               if ((strcmp(path, curdir) != 0 && access(path, W_OK) != 0) ||
+                   chdir(path)) {
                        (void)fprintf(stderr, "make warning: %s: %s.\n",
                                      path, strerror(errno));
                } else {