[src/trunk]: src/sys/arch/pmax/stand/boot If only a device name is specified ...

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

details:   https://anonhg.NetBSD.org/src/rev/cd186a680298
branches:  trunk
changeset: 471818:cd186a680298
user:      simonb <simonb%NetBSD.org@localhost>
date:      Mon Apr 12 05:19:25 1999 +0000

description:
If only a device name is specified with no kernel name, try to load a
kernel from a default list of names.  This list is netbsd, netbsd.bak,
netbsd.old, onetbsd and gennetbsd - all without and with a .gz
extension.

diffstat:

 sys/arch/pmax/stand/boot/boot.c |  110 ++++++++++++++++++++++++++++++++++-----
 1 files changed, 94 insertions(+), 16 deletions(-)

diffs (158 lines):

diff -r b30645d38bdf -r cd186a680298 sys/arch/pmax/stand/boot/boot.c
--- a/sys/arch/pmax/stand/boot/boot.c   Mon Apr 12 05:14:51 1999 +0000
+++ b/sys/arch/pmax/stand/boot/boot.c   Mon Apr 12 05:19:25 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: boot.c,v 1.5 1999/04/11 04:25:47 simonb Exp $  */
+/*     $NetBSD: boot.c,v 1.6 1999/04/12 05:19:25 simonb Exp $  */
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -91,27 +91,46 @@
 
 extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[];
 
+char *kernelnames[] = {
+       "netbsd",       "netbsd.gz",
+       "netbsd.bak",   "netbsd.bak.gz",
+       "netbsd.old",   "netbsd.old.gz",
+       "onetbsd",      "onetbsd.gz",
+       "gennetbsd",    "gennetbsd.gz",
+#ifdef notyet
+       "netbsd.el",    "netbsd.el.gz",
+#endif /*notyet*/
+       NULL
+};
+
+
+static int devonly __P((char *));
 int main __P((int, char **));
 
 /*
- * This gets arguments from the PROM, calls other routines to open
- * and load the program to boot, and then transfers execution to that
- * new program.
- * Argv[0] should be something like "rz(0,0,0)vmunix" on a DECstation 3100.
- * Argv[0,1] should be something like "boot 5/rz0/vmunix" on a DECstation 5000.
- * The argument "-a" means vmunix should do an automatic reboot.
+ * This gets arguments from the first stage boot lader, calls PROM routines
+ * to open and load the program to boot, and then transfers execution to
+ * that new program.
+ *
+ * Argv[0] should be something like "rz(0,0,0)netbsd" on a DECstation 3100.
+ * Argv[0,1] should be something like "boot 5/rz0/netbsd" on a DECstation 5000.
+ * The argument "-a" means netbsd should do an automatic reboot.
  */
 int
 main(argc, argv)
        int argc;
        char **argv;
 {
-       char *cp;
-       int entry;
+       char *name, **namep, *dev;
+       char bootname[PATH_MAX], bootpath[PATH_MAX];
+       int entry, win;
        u_long marks[MARK_MAX];
        struct btinfo_symtab bi_syms;
        struct btinfo_bootpath bi_bpath;
 
+       printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev);
+       printf(">> (%s, %s)\n", bootprog_maker, bootprog_date);
+
        /* initialise bootinfo structure early */
        bi_init(BOOTINFO_ADDR);
 
@@ -120,18 +139,38 @@
                argc--;
                argv++;
        }
-       cp = *argv;
-       printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev);
-       printf(">> (%s, %s)\n", bootprog_maker, bootprog_date);
+       name = argv[0];
+       printf("Boot: %s\n", name);
 
-       printf("Boot: %s\n", cp);
-       strncpy(bi_bpath.bootpath, cp, BTINFO_BOOTPATH_LEN);
-       bi_add(&bi_bpath, BTINFO_BOOTPATH, sizeof(bi_bpath));
+       /* NOTE: devonly() can modify name[]. */
+       strcpy(bootname, argv[0]);
+       if (devonly(bootname)) {
+               dev = bootname;
+               name = NULL;
+       }
 
        marks[MARK_START] = 0;
-       if (loadfile(cp, marks, LOAD_ALL) == -1)
+       if (name != NULL)
+               win = (loadfile(name, marks, LOAD_ALL) != -1);
+       else {
+               win = 0;
+               for (namep = kernelnames, win = 0; *namep != NULL && !win;
+                   namep++) {
+                       name = *namep;
+                       strcpy(bootpath, dev);
+                       strcat(bootpath, name);
+                       printf("Loading: %s\n", bootpath);
+                       win = (loadfile(bootpath, marks, LOAD_ALL) != -1);
+                       if (win)
+                               name = bootpath;
+               }
+       }
+       if (!win)
                goto fail;
 
+       strncpy(bi_bpath.bootpath, name, BTINFO_BOOTPATH_LEN);
+       bi_add(&bi_bpath, BTINFO_BOOTPATH, sizeof(bi_bpath));
+
        entry = marks[MARK_ENTRY];
        bi_syms.nsym = marks[MARK_NSYM];
        bi_syms.ssym = marks[MARK_SYM];
@@ -145,8 +184,47 @@
        else
                startprog(entry, entry, argc, argv, DEC_PROM_MAGIC,
                    callv, BOOTINFO_MAGIC, BOOTINFO_ADDR);
+       (void)printf("KERNEL RETURNED!\n");
 
 fail:
        (void)printf("Boot failed!  Halting...\n");
        return (0);
 }
+
+
+/*
+ * Check whether or not fname is a device name only or a full
+ * bootpath including the kernel name.  This code to do this
+ * is copied from loadfile() in the first stage bootblocks.
+ *
+ * NOTE:  fname will be modified if it's of the form N/rzY
+ *        without a trailing slash.
+ */
+static
+int
+devonly(fname)
+       char *fname;
+{
+       char c;
+
+       while ((c = *fname++) != '\0') {
+               if (c == ')')
+                       break;
+               if (c != '/')
+                       continue;
+               while ((c = *fname++) != '\0')
+                       if (c == '/')
+                               break;
+               /*
+                * Make "N/rzY" with no trailing '/' valid by adding
+                * the extra '/' before appending 'boot' to the path.
+                */
+               if (c != '/') {
+                       fname--;
+                       *fname++ = '/';
+                       *fname = '\0';
+               }
+               break;
+       }
+       return (*fname == '\0');
+}