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freebsd/usr.sbin/ofwdump/ofw_util.c
Thomas Moestl 987c23d4ff Autosize the property buffer instead of limiting it to 8192, and
exiting if a property happens to be larger.
2003-06-11 18:44:26 +00:00

326 lines
7.2 KiB
C

/*-
* Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
* 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.
*
* 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 OR CONTRIBUTORS 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/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/ioctl.h>
#include <dev/ofw/openfirmio.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vis.h>
#include "pathnames.h"
#include "ofw_util.h"
/* Constants controlling the layout of the output. */
#define LVLINDENT 2
#define NAMEINDENT 2
#define DUMPINDENT 4
#define CHARSPERLINE 60
#define BYTESPERLINE (CHARSPERLINE / 3)
/* Default space reserved for properties. */
#define PROPBUFLEN 8192
#define OFW_IOCTL(fd, cmd, val) do { \
if (ioctl(fd, cmd, val) == -1) \
err(1, "ioctl(..., " #cmd ", ...) failed"); \
} while (0)
int
ofw_open(void)
{
int fd;
if ((fd = open(PATH_DEV_OPENFIRM, O_RDONLY)) == -1)
err(1, "could not open " PATH_DEV_OPENFIRM);
return (fd);
}
void
ofw_close(int fd)
{
close(fd);
}
phandle_t
ofw_root(int fd)
{
return (ofw_peer(fd, 0));
}
phandle_t
ofw_peer(int fd, phandle_t node)
{
phandle_t rv;
rv = node;
OFW_IOCTL(fd, OFIOCGETNEXT, &rv);
return (rv);
}
phandle_t
ofw_child(int fd, phandle_t node)
{
phandle_t rv;
rv = node;
OFW_IOCTL(fd, OFIOCGETCHILD, &rv);
return (rv);
}
phandle_t
ofw_finddevice(int fd, char *name)
{
struct ofiocdesc d;
d.of_nodeid = 0;
d.of_namelen = strlen(name);
d.of_name = name;
d.of_buflen = 0;
d.of_buf = NULL;
if (ioctl(fd, OFIOCFINDDEVICE, &d) == -1) {
if (errno == ENOENT)
err(2, "Node '%s' not found", name);
else
err(1, "ioctl(..., OFIOCFINDDEVICE, ...) failed");
}
return (d.of_nodeid);
}
int
ofw_firstprop(int fd, phandle_t node, char *buf, int buflen)
{
return (ofw_nextprop(fd, node, NULL, buf, buflen));
}
int
ofw_nextprop(int fd, phandle_t node, char *prev, char *buf, int buflen)
{
struct ofiocdesc d;
d.of_nodeid = node;
d.of_namelen = prev != NULL ? strlen(prev) : 0;
d.of_name = prev;
d.of_buflen = buflen;
d.of_buf = buf;
if (ioctl(fd, OFIOCNEXTPROP, &d) == -1) {
if (errno == ENOENT)
return (0);
else
err(1, "ioctl(..., OFIOCNEXTPROP, ...) failed");
}
return (d.of_buflen);
}
static void *
ofw_malloc(int size)
{
void *p;
if ((p = malloc(size)) == NULL)
err(1, "malloc() failed");
return (p);
}
int
ofw_getprop(int fd, phandle_t node, const char *name, void *buf, int buflen)
{
struct ofiocdesc d;
d.of_nodeid = node;
d.of_namelen = strlen(name);
d.of_name = name;
d.of_buflen = buflen;
d.of_buf = buf;
OFW_IOCTL(fd, OFIOCGET, &d);
return (d.of_buflen);
}
int
ofw_getproplen(int fd, phandle_t node, const char *name)
{
struct ofiocdesc d;
d.of_nodeid = node;
d.of_namelen = strlen(name);
d.of_name = name;
OFW_IOCTL(fd, OFIOCGETPROPLEN, &d);
return (d.of_buflen);
}
int
ofw_getprop_alloc(int fd, phandle_t node, const char *name, void **buf,
int *buflen, int reserve)
{
struct ofiocdesc d;
int len, rv;
do {
len = ofw_getproplen(fd, node, name);
if (len < 0)
return (len);
if (*buflen < len + reserve) {
if (*buf != NULL)
free(*buf);
*buflen = len + reserve + PROPBUFLEN;
*buf = ofw_malloc(*buflen);
}
d.of_nodeid = node;
d.of_namelen = strlen(name);
d.of_name = name;
d.of_buflen = *buflen - reserve;
d.of_buf = *buf;
rv = ioctl(fd, OFIOCGET, &d);
} while (rv == -1 && errno == ENOMEM);
if (rv == -1)
err(1, "ioctl(..., OFIOCGET, ...) failed");
return (d.of_buflen);
}
static void
ofw_indent(int level)
{
int i;
for (i = 0; i < level; i++)
putchar(' ');
}
static void
ofw_dump_properties(int fd, phandle_t n, int level, char *pmatch, int raw,
int str)
{
static char *pbuf;
static char *visbuf;
static char printbuf[CHARSPERLINE + 1];
static int pblen, vblen;
char prop[32];
int nlen, len, i, j, max, vlen;
unsigned int b;
for (nlen = ofw_firstprop(fd, n, prop, sizeof(prop)); nlen != 0;
nlen = ofw_nextprop(fd, n, prop, prop, sizeof(prop))) {
if (pmatch != NULL && strcmp(pmatch, prop) != 0)
continue;
len = ofw_getprop_alloc(fd, n, prop, (void **)&pbuf, &pblen, 1);
if (len < 0)
continue;
if (raw)
write(STDOUT_FILENO, pbuf, len);
else if (str) {
pbuf[len] = '\0';
printf("%s\n", pbuf);
} else {
ofw_indent(level * LVLINDENT + NAMEINDENT);
printf("%s:\n", prop);
/* Print in hex. */
for (i = 0; i < len; i += BYTESPERLINE) {
max = len - i;
max = max > BYTESPERLINE ? BYTESPERLINE : max;
ofw_indent(level * LVLINDENT + DUMPINDENT);
for (j = 0; j < max; j++) {
b = (unsigned char)pbuf[i + j];
printf("%02x ", b);
}
printf("\n");
}
/*
* strvis() and print if it looks like it is
* zero-terminated.
*/
if (pbuf[len - 1] == '\0' &&
strlen(pbuf) == (unsigned)len - 1) {
if (vblen < (len - 1) * 4 + 1) {
if (visbuf != NULL)
free(visbuf);
vblen = (PROPBUFLEN + len) * 4 + 1;
visbuf = ofw_malloc(vblen);
}
vlen = strvis(visbuf, pbuf, VIS_TAB | VIS_NL);
for (i = 0; i < vlen; i += CHARSPERLINE) {
ofw_indent(level * LVLINDENT +
DUMPINDENT);
strlcpy(printbuf, &visbuf[i],
sizeof(printbuf));
printf("'%s'\n", printbuf);
}
}
}
}
}
static void
ofw_dump_node(int fd, phandle_t n, int level, int rec, int prop, char *pmatch,
int raw, int str)
{
static char *nbuf;
static int nblen = 0;
int plen;
phandle_t c;
if (!(raw || str)) {
ofw_indent(level * LVLINDENT);
printf("Node %#lx", (unsigned long)n);
plen = ofw_getprop_alloc(fd, n, "name", (void **)&nbuf,
&nblen, 1);
if (plen > 0) {
nbuf[plen] = '\0';
printf(": %s\n", nbuf);
} else
putchar('\n');
}
if (prop)
ofw_dump_properties(fd, n, level, pmatch, raw, str);
if (rec) {
for (c = ofw_child(fd, n); c != 0; c = ofw_peer(fd, c)) {
ofw_dump_node(fd, c, level + 1, rec, prop, pmatch,
raw, str);
}
}
}
void
ofw_dump(int fd, char *start, int rec, int prop, char *pmatch, int raw, int str)
{
phandle_t n;
n = start == NULL ? ofw_root(fd) : ofw_finddevice(fd, start);
ofw_dump_node(fd, n, 0, rec, prop, pmatch, raw, str);
}