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[src/trunk]: src/sys/arch/alpha/stand/installboot add a new from-scratch (act...
details: https://anonhg.NetBSD.org/src/rev/11daadd1e521
branches: trunk
changeset: 471568:11daadd1e521
user: cgd <cgd%NetBSD.org@localhost>
date: Mon Apr 05 03:07:37 1999 +0000
description:
add a new from-scratch (actually, from mkbootimage, but that's close
enough) implementation of installboot(8) which installs the new file
system specific boot blocks.
diffstat:
sys/arch/alpha/stand/installboot/Makefile | 5 +
sys/arch/alpha/stand/installboot/installboot.c | 265 +++++++++++++++++++++++++
2 files changed, 270 insertions(+), 0 deletions(-)
diffs (278 lines):
diff -r 68aafde5d70d -r 11daadd1e521 sys/arch/alpha/stand/installboot/Makefile
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/alpha/stand/installboot/Makefile Mon Apr 05 03:07:37 1999 +0000
@@ -0,0 +1,5 @@
+# $NetBSD: Makefile,v 1.12 1999/04/05 03:07:37 cgd Exp $
+
+PROG= installboot
+
+.include <bsd.prog.mk>
diff -r 68aafde5d70d -r 11daadd1e521 sys/arch/alpha/stand/installboot/installboot.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/alpha/stand/installboot/installboot.c Mon Apr 05 03:07:37 1999 +0000
@@ -0,0 +1,265 @@
+/* $NetBSD: installboot.c,v 1.14 1999/04/05 03:07:37 cgd Exp $ */
+
+/*
+ * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Christopher G. Demetriou
+ * for the NetBSD Project.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h> /* XXX for roundup, howmany */
+#include <sys/stat.h>
+#include <sys/disklabel.h>
+#include <assert.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+static void usage(void);
+static void clr_bootstrap(const char *disk);
+static void set_bootstrap(const char *disk, const char *bootstrap);
+
+extern char *__progname;
+
+int verbose, nowrite;
+
+static void
+usage()
+{
+ fprintf(stderr, "usage:\n");
+ fprintf(stderr, "\t%s [-n] [-v] disk bootstrap\n", __progname);
+ fprintf(stderr, "\t%s [-n] [-v] -c disk\n", __progname);
+ exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char **argv)
+{
+ const char *disk, *bootstrap;
+ int c, clearflag;
+
+ clearflag = verbose = nowrite = 0;
+
+ while ((c = getopt(argc, argv, "cnv")) != -1) {
+ switch (c) {
+ case 'c':
+ /* Clear any existing boot block */
+ clearflag = 1;
+ break;
+ case 'n':
+ /* Do not actually write the boot file */
+ nowrite = 1;
+ break;
+ case 'v':
+ /* Chat */
+ verbose = 1;
+ break;
+ default:
+ usage();
+ }
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ if ((clearflag && argc != 1) || (!clearflag && argc != 2))
+ usage();
+
+ disk = argv[0];
+ bootstrap = argv[1]; /* NULL if argc == 1 */
+
+ if (verbose) {
+ fprintf(stderr, "disk: %s\n", disk);
+ fprintf(stderr, "bootstrap: %s\n",
+ bootstrap != NULL ? bootstrap : "to be cleared");
+ }
+ if (sizeof (struct boot_block) != BOOT_BLOCK_BLOCKSIZE)
+ errx(EXIT_FAILURE,
+ "boot_block structure badly sized (build error)");
+
+ if (clearflag)
+ clr_bootstrap(disk);
+ else
+ set_bootstrap(disk, bootstrap);
+
+ exit(EXIT_SUCCESS);
+}
+
+static void
+clr_bootstrap(const char *disk)
+{
+ struct boot_block bb;
+ u_int64_t cksum;
+ ssize_t rv;
+ int diskfd;
+
+ if ((diskfd = open(disk, nowrite ? O_RDONLY : O_RDWR)) == -1)
+ err(EXIT_FAILURE, "open %s", disk);
+
+ rv = pread(diskfd, &bb, sizeof bb, BOOT_BLOCK_OFFSET);
+ if (rv == -1)
+ err(EXIT_FAILURE, "read %s", disk);
+ else if (rv != sizeof bb)
+ errx(EXIT_FAILURE, "read %s: short read", disk);
+
+ CHECKSUM_BOOT_BLOCK(&bb, &cksum);
+ if (cksum != bb.bb_cksum) {
+ fprintf(stderr,
+ "old boot block checksum invalid (was %#llx, calculated %#llx)\n",
+ (unsigned long long)bb.bb_cksum,
+ (unsigned long long)cksum);
+ fprintf(stderr, "boot block invalid\n");
+ goto done;
+ } else if (verbose) {
+ fprintf(stderr, "old boot block checksum: %#llx\n",
+ (unsigned long long)bb.bb_cksum);
+ fprintf(stderr, "old boot block start sector: %#llx\n",
+ (unsigned long long)bb.bb_secstart);
+ fprintf(stderr, "old boot block size: %#llx\n",
+ (unsigned long long)bb.bb_secsize);
+ }
+
+ bb.bb_secstart = bb.bb_secsize = 0;
+ CHECKSUM_BOOT_BLOCK(&bb, &bb.bb_cksum);
+
+ fprintf(stderr, "new boot block checksum: %#llx\n",
+ (unsigned long long)bb.bb_cksum);
+ fprintf(stderr, "new boot block start sector: %#llx\n",
+ (unsigned long long)bb.bb_secstart);
+ fprintf(stderr, "new boot block size: %#llx\n",
+ (unsigned long long)bb.bb_secsize);
+
+ if (nowrite) {
+ if (verbose)
+ fprintf(stderr, "not writing\n");
+ goto done;
+ }
+
+ if (verbose)
+ fprintf(stderr, "writing\n");
+
+ rv = pwrite(diskfd, &bb, sizeof bb, BOOT_BLOCK_OFFSET);
+ if (rv == -1)
+ err(EXIT_FAILURE, "write %s", disk);
+ else if (rv != sizeof bb)
+ errx(EXIT_FAILURE, "write %s: short write", disk);
+
+done:
+ (void)close(diskfd);
+}
+
+static void
+set_bootstrap(const char *disk, const char *bootstrap)
+{
+ struct stat bootstrapsb;
+ struct boot_block bb;
+ int bootstrapfd, diskfd;
+ char *bootstrapbuf;
+ size_t bootstrapsize;
+ ssize_t rv;
+
+ /* Open the input file and check it out */
+ if ((bootstrapfd = open(bootstrap, O_RDONLY)) == -1)
+ err(EXIT_FAILURE, "open %s", bootstrap);
+ if (fstat(bootstrapfd, &bootstrapsb) == -1)
+ err(EXIT_FAILURE, "fstat %s", bootstrap);
+ if (!S_ISREG(bootstrapsb.st_mode))
+ errx(EXIT_FAILURE, "%s must be a regular file", bootstrap);
+
+ /*
+ * Allocate a buffer, with space to round up the input file
+ * to the next block size boundary, and with space for the boot
+ * block.
+ */
+ bootstrapsize = roundup(bootstrapsb.st_size, BOOT_BLOCK_BLOCKSIZE);
+
+ bootstrapbuf = malloc(bootstrapsize);
+ if (bootstrapbuf == NULL)
+ err(EXIT_FAILURE, "allocating buffer to hold bootstrap");
+ memset(bootstrapbuf, 0, bootstrapsize);
+
+ /* read the file into the buffer */
+ rv = read(bootstrapfd, bootstrapbuf, bootstrapsb.st_size);
+ if (rv == -1)
+ err(EXIT_FAILURE, "read %s", bootstrap);
+ else if (rv != bootstrapsb.st_size)
+ errx(EXIT_FAILURE, "read %s: short read", bootstrap);
+ (void)close(bootstrapfd);
+
+ if ((diskfd = open(disk, nowrite ? O_RDONLY : O_RDWR)) == -1)
+ err(EXIT_FAILURE, "open %s", disk);
+
+ rv = pread(diskfd, &bb, sizeof bb, BOOT_BLOCK_OFFSET);
+ if (rv == -1)
+ err(EXIT_FAILURE, "read %s", disk);
+ else if (rv != sizeof bb)
+ errx(EXIT_FAILURE, "read %s: short read", disk);
+
+ /* fill in the updated boot block fields, and checksum boot block */
+ bb.bb_secsize = howmany(bootstrapsb.st_size, BOOT_BLOCK_BLOCKSIZE);
+ bb.bb_secstart = 1;
+ CHECKSUM_BOOT_BLOCK(&bb, &bb.bb_cksum);
+
+ if (verbose) {
+ fprintf(stderr, "bootstrap starting sector: %llu\n",
+ (unsigned long long)bb.bb_secstart);
+ fprintf(stderr, "bootstrap sector count: %llu\n",
+ (unsigned long long)bb.bb_secsize);
+ fprintf(stderr, "new boot block checksum: %#llx\n",
+ (unsigned long long)bb.bb_cksum);
+ }
+
+ if (nowrite) {
+ if (verbose)
+ fprintf(stderr, "not writing\n");
+ goto done;
+ }
+
+ if (verbose)
+ fprintf(stderr, "writing bootstrap\n");
+
+ rv = pwrite(diskfd, bootstrapbuf, bootstrapsize,
+ BOOT_BLOCK_OFFSET + BOOT_BLOCK_BLOCKSIZE);
+ if (rv == -1)
+ err(EXIT_FAILURE, "write %s", disk);
+ else if (rv != sizeof bb)
+ errx(EXIT_FAILURE, "write %s: short write", disk);
+
+ if (verbose)
+ fprintf(stderr, "writing boot block\n");
+
+ rv = pwrite(diskfd, &bb, sizeof bb, BOOT_BLOCK_OFFSET);
+ if (rv == -1)
+ err(EXIT_FAILURE, "write %s", disk);
+ else if (rv != sizeof bb)
+ errx(EXIT_FAILURE, "write %s: short write", disk);
+
+done:
+ (void)close(diskfd);
+}
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