sys/boot/common/misc.c

   1 /*-
   2  * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/boot/common/misc.c,v 1.8 2003/08/25 23:30:41 obrien Exp $
  27  * $DragonFly: src/sys/boot/common/misc.c,v 1.3 2003/11/10 06:08:31 dillon Exp $
  28  */
  29
  30 #include <string.h>
  31 #include <stand.h>
  32 #include <bootstrap.h>
  33
  34 /*
  35  * Concatenate the (argc) elements of (argv) into a single string, and return
  36  * a copy of same.
  37  */
  38 char *
  39 unargv(int argc, char *argv[])
  40 {
  41     size_t      hlong;
  42     int         i;
  43     char        *cp;
  44
  45     for (hlong = 0, i = 0, hlong = 0; i < argc; i++)
  46         hlong += strlen(argv[i]) + 2;
  47
  48     if(hlong == 0)
  49         return(NULL);
  50
  51     cp = malloc(hlong);
  52     cp[0] = 0;
  53     for (i = 0; i < argc; i++) {
  54         strcat(cp, argv[i]);
  55         if (i < (argc - 1))
  56           strcat(cp, " ");
  57     }
  58
  59     return(cp);
  60 }
  61
  62 /*
  63  * Get the length of a string in kernel space
  64  */
  65 size_t
  66 strlenout(vm_offset_t src)
  67 {
  68     char        c;
  69     size_t      len;
  70
  71     for (len = 0; ; len++) {
  72         archsw.arch_copyout(src++, &c, 1);
  73         if (c == 0)
  74             break;
  75     }
  76     return(len);
  77 }
  78
  79 /*
  80  * Make a duplicate copy of a string in kernel space
  81  */
  82 char *
  83 strdupout(vm_offset_t str)
  84 {
  85     char        *result, *cp;
  86
  87     result = malloc(strlenout(str) + 1);
  88     for (cp = result; ;cp++) {
  89         archsw.arch_copyout(str++, cp, 1);
  90         if (*cp == 0)
  91             break;
  92     }
  93     return(result);
  94 }
  95
  96 /*
  97  * Display a region in traditional hexdump format.
  98  */
  99 void
 100 hexdump(caddr_t region, size_t len)
 101 {
 102     caddr_t     line;
 103     int         x, c;
 104     char        lbuf[80];
 105 #define emit(fmt, args...)      {sprintf(lbuf, fmt , ## args); pager_output(lbuf);}
 106
 107     pager_open();
 108     for (line = region; line < (region + len); line += 16) {
 109         emit("%08lx  ", (long) line);
 110
 111         for (x = 0; x < 16; x++) {
 112             if ((line + x) < (region + len)) {
 113                 emit("%02x ", *(u_int8_t *)(line + x));
 114             } else {
 115                 emit("-- ");
 116             }
 117             if (x == 7)
 118                 emit(" ");
 119         }
 120         emit(" |");
 121         for (x = 0; x < 16; x++) {
 122             if ((line + x) < (region + len)) {
 123                 c = *(u_int8_t *)(line + x);
 124                 if ((c < ' ') || (c > '~'))     /* !isprint(c) */
 125                     c = '.';
 126                 emit("%c", c);
 127             } else {
 128                 emit(" ");
 129             }
 130         }
 131         emit("|\n");
 132     }
 133     pager_close();
 134 }
 135
 136 void
 137 dev_cleanup(void)
 138 {
 139     int         i;
 140
 141     /* Call cleanup routines */
 142     for (i = 0; devsw[i] != NULL; ++i)
 143         if (devsw[i]->dv_cleanup != NULL)
 144             (devsw[i]->dv_cleanup)();
 145 }