Teach sysinstall(8) how to read boot managers out of /boot

instead of hardcoding them into the binary.  This replaces
the work-around in usr.sbin/sysinstall/Makefile,v 1.121.

Suggested by:	jhb
MFC in:		1 week

2 files changed, 17 insertions, 50 deletions

diff --git a/usr.sbin/sade/Makefile b/usr.sbin/sade/Makefile
index 658c3e7..298dddc 100644
--- a/usr.sbin/sade/Makefile
+++ b/usr.sbin/sade/Makefile
@@ -54,46 +54,6 @@ makedevs.c:	Makefile rtermcap
 		file2c 'const char termcap_xterm[] = {' ',0};' \
 		>> makedevs.c
 
-.if ${MACHINE_ARCH} == i386
-# XXX boot images aren't yet ready when "make depend" is run
-.if !make(depend)
-SRCS+=	makeboot.c
-.endif
-CLEANFILES+= makeboot.c
-.if exists(${.OBJDIR}/../../sys/boot/${MACHINE}/boot0/boot0)
-BOOT0=	${.OBJDIR}/../../sys/boot/${MACHINE}/boot0/boot0
-.else
-BOOT0=	/boot/boot0
-.endif
-makeboot.c: ${BOOT0}
-.if ${MACHINE} == "i386"
-.if exists(${.OBJDIR}/../../sys/boot/i386/mbr/mbr)
-MBR=	${.OBJDIR}/../../sys/boot/i386/mbr/mbr
-.else
-MBR=	/boot/mbr
-.endif
-makeboot.c: ${MBR}
-.elif ${MACHINE} == "pc98"
-.if exists(${.OBJDIR}/../../sys/boot/pc98/boot0.5/boot0.5)
-BOOT05=	${.OBJDIR}/../../sys/boot/pc98/boot0.5/boot0.5
-.else
-BOOT05=	/boot/boot0.5
-.endif
-makeboot.c: ${BOOT05}
-.endif
-makeboot.c: Makefile
-	echo '#include <sys/types.h>' > makeboot.c
-	file2c 'u_char boot0[] = {' '};' < ${BOOT0} >> makeboot.c
-	echo "size_t boot0_size = sizeof(boot0);" >> makeboot.c
-.if ${MACHINE} == i386
-	file2c 'u_char mbr[] = {' '};' < ${MBR} >> makeboot.c
-	echo "size_t mbr_size = sizeof(mbr);" >> makeboot.c
-.elif ${MACHINE} == "pc98"
-	file2c 'u_char boot05[] = {' '};' < ${BOOT05} >> makeboot.c
-	echo "size_t boot05_size = sizeof(boot05);" >> makeboot.c
-.endif
-.endif
-
 build-tools:	rtermcap
 
 rtermcap:	rtermcap.c
diff --git a/usr.sbin/sade/disks.c b/usr.sbin/sade/disks.c
index 8659962..495338b 100644
--- a/usr.sbin/sade/disks.c
+++ b/usr.sbin/sade/disks.c
@@ -58,6 +58,7 @@ static struct chunk *chunk_info[16];
 static int current_chunk;
 
 static void	diskPartitionNonInteractive(Device *dev);
+static u_char *	bootalloc(char *name, size_t *size);
 
 static void
 record_chunks(Disk *d)
@@ -168,10 +169,10 @@ static void
 getBootMgr(char *dname, u_char **bootipl, size_t *bootipl_size,
 	   u_char **bootmenu, size_t *bootmenu_size)
 {
-    extern u_char boot0[];
-    extern size_t boot0_size;
-    extern u_char boot05[];
-    extern size_t boot05_size;
+    static u_char *boot0;
+    static size_t boot0_size;
+    static u_char *boot05;
+    static size_t boot05_size;
 
     char str[80];
     char *cp;
@@ -192,8 +193,10 @@ getBootMgr(char *dname, u_char **bootipl, size_t *bootipl_size,
     if (cp || i) {
 	switch (BootMgr) {
 	case 0:
+	    if (!boot0) boot0 = bootalloc("boot0", &boot0_size);
 	    *bootipl = boot0;
 	    *bootipl_size = boot0_size;
+	    if (!boot05) boot05 = bootalloc("boot0.5", &boot05_size);
 	    *bootmenu = boot05;
 	    *bootmenu_size = boot05_size;
 	    return;
@@ -212,8 +215,8 @@ static void
 getBootMgr(char *dname, u_char **bootCode, size_t *bootCodeSize)
 {
 #ifndef __alpha__	/* only meaningful on x86 */
-    extern u_char mbr[], boot0[];
-    extern size_t mbr_size, boot0_size;
+    static u_char *mbr, *boot0;
+    static size_t mbr_size, boot0_size;
     char str[80];
     char *cp;
     int i = 0;
@@ -236,10 +239,12 @@ getBootMgr(char *dname, u_char **bootCode, size_t *bootCodeSize)
     if (cp || i) {
 	switch (BootMgr) {
 	case 0:
+	    if (!boot0) boot0 = bootalloc("boot0", &boot0_size);
 	    *bootCode = boot0;
 	    *bootCodeSize = boot0_size;
 	    return;
 	case 1:
+	    if (!mbr) mbr = bootalloc("mbr", &mbr_size);
 	    *bootCode = mbr;
 	    *bootCodeSize = mbr_size;
 	    return;
@@ -671,7 +676,7 @@ diskPartition(Device *dev)
 }
 
 static u_char *
-bootalloc(char *name)
+bootalloc(char *name, size_t *size)
 {
     char buf[FILENAME_MAX];
     struct stat sb;
@@ -692,6 +697,8 @@ bootalloc(char *name)
 		return NULL;
 	    }
 	    close(fd);
+	    if (size != NULL)
+		*size = sb.st_size;
 	    return cp;
 	}
 	msgDebug("bootalloc: couldn't open %s\n", buf);
@@ -815,11 +822,11 @@ diskPartitionWrite(dialogMenuItem *self)
 	    continue;
 
 #ifdef __alpha__
-	if (!boot1) boot1 = bootalloc("boot1");
+	if (!boot1) boot1 = bootalloc("boot1", NULL);
 	Set_Boot_Blocks(d, boot1, NULL);
 #else
-	if (!boot1) boot1 = bootalloc("boot1");
-	if (!boot2) boot2 = bootalloc("boot2");
+	if (!boot1) boot1 = bootalloc("boot1", NULL);
+	if (!boot2) boot2 = bootalloc("boot2", NULL);
 	Set_Boot_Blocks(d, boot1, boot2);
 #endif