misc.c revision 1.1 
1/*	$NetBSD: misc.c,v 1.1 2006/04/07 14:21:29 cherry Exp $	*/
2
3/*-
4 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30
31#include <lib/libsa/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 */
38char *
39unargv(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 = alloc(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 */
65size_t
66strlenout(vaddr_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 */
82char *
83strdupout(vaddr_t str)
84{
85    char	*result, *cp;
86
87    result = alloc(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/* Zero a region in kernel space. */
97void
98kern_bzero(vaddr_t dest, size_t len)
99{
100	char buf[256];
101	size_t chunk, resid;
102
103	bzero(buf, sizeof(buf));
104	resid = len;
105	while (resid > 0) {
106		chunk = min(sizeof(buf), resid);
107		archsw.arch_copyin(buf, dest, chunk);
108		resid -= chunk;
109		dest += chunk;
110	}
111}
112
113/*
114 * Read the specified part of a file to kernel space.  Unlike regular
115 * pread, the file pointer is advanced to the end of the read data,
116 * and it just returns 0 if successful.
117 */
118int
119kern_pread(int fd, vaddr_t dest, size_t len, off_t off)
120{
121	ssize_t nread;
122
123	if (lseek(fd, off, SEEK_SET) == -1) {
124		printf("\nlseek failed\n");
125		return (-1);
126	}
127	nread = archsw.arch_readin(fd, dest, len);
128	if (nread != len) {
129		printf("\nreadin failed\n");
130		return (-1);
131	}
132	return (0);
133}
134
135/*
136 * Read the specified part of a file to a malloced buffer.  The file
137 * pointer is advanced to the end of the read data.
138 */
139void *
140alloc_pread(int fd, off_t off, size_t len)
141{
142	void *buf;
143	ssize_t nread;
144
145	buf = alloc(len);
146	if (buf == NULL) {
147		printf("\nalloc(%d) failed\n", (int)len);
148		return (NULL);
149	}
150	if (lseek(fd, off, SEEK_SET) == -1) {
151		printf("\nlseek failed\n");
152		free(buf);
153		return (NULL);
154	}
155	nread = read(fd, buf, len);
156	if (nread != len) {
157		printf("\nread failed\n");
158		free(buf);
159		return (NULL);
160	}
161	return (buf);
162}
163
164/*
165 * Display a region in traditional hexdump format.
166 */
167void
168hexdump(caddr_t region, size_t len)
169{
170    caddr_t	line;
171    int		x, c;
172    char	lbuf[80];
173#define emit(fmt, args...)	{sprintf(lbuf, fmt , ## args); pager_output(lbuf);}
174
175    pager_open();
176    for (line = region; line < (region + len); line += 16) {
177	emit("%08lx  ", (long) line);
178
179	for (x = 0; x < 16; x++) {
180	    if ((line + x) < (region + len)) {
181		emit("%02x ", *(u_int8_t *)(line + x));
182	    } else {
183		emit("-- ");
184	    }
185	    if (x == 7)
186		emit(" ");
187	}
188	emit(" |");
189	for (x = 0; x < 16; x++) {
190	    if ((line + x) < (region + len)) {
191		c = *(u_int8_t *)(line + x);
192		if ((c < ' ') || (c > '~'))	/* !isprint(c) */
193		    c = '.';
194		emit("%c", c);
195	    } else {
196		emit(" ");
197	    }
198	}
199	emit("|\n");
200    }
201    pager_close();
202}
203
204void
205dev_cleanup(void)
206{
207
208}
209