From 03210956277ac967ac95acee043246b84a7a5694 Mon Sep 17 00:00:00 2001
From: espie <espie@openbsd.org>
Date: Tue, 29 Oct 2013 15:37:56 +0000
Subject: emit an extra "config" convenience target that allows one to rerun
 config without changing directories.

Lots of inputs by deraadt@, who wanted it to work for movable
relative directories.
---
 usr.sbin/config/config.h     |  6 +++++-
 usr.sbin/config/main.c       | 20 ++++++++++++++++++--
 usr.sbin/config/mkmakefile.c | 34 +++++++++++++++++++++++++++++++++-
 3 files changed, 56 insertions(+), 4 deletions(-)

(limited to 'usr.sbin/config')

diff --git a/usr.sbin/config/config.h b/usr.sbin/config/config.h
index 9c3ac277322..49d2b373141 100644
--- a/usr.sbin/config/config.h
+++ b/usr.sbin/config/config.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: config.h,v 1.25 2012/12/05 23:20:26 deraadt Exp $	*/
+/*	$OpenBSD: config.h,v 1.26 2013/10/29 15:37:56 espie Exp $	*/
 /*	$NetBSD: config.h,v 1.30 1997/02/02 21:12:30 thorpej Exp $	*/
 
 /*
@@ -339,6 +339,10 @@ void	defoption(const char *name);
 int	devbase_has_instances(struct devbase *, int);
 int	deva_has_instances(struct deva *, int);
 void	setupdirs(void);
+int	pflag;
+char 	*sflag;
+char	*bflag;
+char	*startdir;
 
 /* mkheaders.c */
 int	mkheaders(void);
diff --git a/usr.sbin/config/main.c b/usr.sbin/config/main.c
index 531c2438915..e1926c7b984 100644
--- a/usr.sbin/config/main.c
+++ b/usr.sbin/config/main.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.44 2012/06/22 22:02:29 guenther Exp $	*/
+/*	$OpenBSD: main.c,v 1.45 2013/10/29 15:37:56 espie Exp $	*/
 /*	$NetBSD: main.c,v 1.22 1997/02/02 21:12:33 thorpej Exp $	*/
 
 /*
@@ -93,13 +93,19 @@ usage(void)
 	exit(1);
 }
 
+int pflag = 0;
+char *sflag = NULL;
+char *bflag = NULL;
+char *startdir;
+
 int
 main(int argc, char *argv[])
 {
 	char *p;
 	const char *last_component;
 	char *outfile = NULL;
-	int pflag, ch, eflag, uflag, fflag;
+	int ch, eflag, uflag, fflag;
+	char dirbuffer[PATH_MAX];
 
 	pflag = eflag = uflag = fflag = 0;
 	while ((ch = getopt(argc, argv, "egpfb:s:o:u")) != -1) {
@@ -148,10 +154,12 @@ main(int argc, char *argv[])
 			break;
 
 		case 'b':
+			bflag = optarg;
 			builddir = optarg;
 			break;
 
 		case 's':
+			sflag = optarg;
 			srcdir = optarg;
 			break;
 
@@ -163,7 +171,15 @@ main(int argc, char *argv[])
 	argc -= optind;
 	argv += optind;
 	if (argc > 1 || (eflag && argv[0] == NULL))
+
 		usage();
+	if (bflag) {
+		startdir = getcwd(dirbuffer, sizeof dirbuffer);
+		if (startdir == NULL)
+			warn("Use of -b and can't getcwd, no make config");
+	} else {
+		startdir = "../../conf";
+	}
 
 	if (eflag) {
 #ifdef MAKE_BOOTSTRAP
diff --git a/usr.sbin/config/mkmakefile.c b/usr.sbin/config/mkmakefile.c
index 1e1d90d8489..9af4dfbba0e 100644
--- a/usr.sbin/config/mkmakefile.c
+++ b/usr.sbin/config/mkmakefile.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mkmakefile.c,v 1.37 2012/09/17 17:36:13 espie Exp $	*/
+/*	$OpenBSD: mkmakefile.c,v 1.38 2013/10/29 15:37:56 espie Exp $	*/
 /*	$NetBSD: mkmakefile.c,v 1.34 1997/02/02 21:12:36 thorpej Exp $	*/
 
 /*
@@ -60,6 +60,7 @@
 static const char *srcpath(struct files *);
 
 static int emitdefs(FILE *);
+static int emitreconfig(FILE *);
 static int emitfiles(FILE *, int);
 
 static int emitobjs(FILE *);
@@ -120,6 +121,10 @@ mkmakefile(void)
 		if ((*fn)(ofp))
 			goto wrerror;
 	}
+	if (startdir != NULL) {
+		if (emitreconfig(ofp) != 0)
+			goto wrerror;
+	}
 	if (ferror(ifp)) {
 		(void)fprintf(stderr,
 		    "config: error reading %s (at line %d): %s\n",
@@ -274,6 +279,33 @@ emitdefs(FILE *fp)
 	return (0);
 }
 
+static int
+emitreconfig(FILE *fp)
+{
+	if (fputs("\n"
+	    ".PHONY: config\n"
+	    "config:\n", fp) < 0)
+		return (1);
+	if (fprintf(fp, "\tcd %s && config ", startdir) < 0)
+		return (1);
+	if (pflag) {
+		if (fputs("-p ", fp) < 0)
+			return (1);
+	}
+	if (sflag) {
+		if (fprintf(fp, "-s %s ", sflag) < 0)
+			return (1);
+	}
+	if (bflag) {
+		if (fprintf(fp, "-b %s ", bflag) < 0)
+			return (1);
+	}
+	/* other options */
+	if (fprintf(fp, "%s\n", conffile) < 0)
+		return (1);
+	return (0);
+}
+
 static int
 emitobjs(FILE *fp)
 {
-- 
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