mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 17:18:32 +00:00
225 lines
5.2 KiB
C
225 lines
5.2 KiB
C
/*
|
|
* Copyright (c) 2006 Maxim Sobolev <sobomax@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 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/types.h>
|
|
#include <sys/uio.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <paths.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <dev/powermac_nvram/powermac_nvramvar.h>
|
|
|
|
#define DEVICE_NAME (_PATH_DEV "powermac_nvram")
|
|
|
|
static void usage(void) __dead2;
|
|
static int remove_var(uint8_t *, int, const char *);
|
|
static int append_var(uint8_t *, int, const char *, const char *);
|
|
|
|
struct deletelist {
|
|
char *name;
|
|
struct deletelist *next;
|
|
struct deletelist *last;
|
|
};
|
|
|
|
static union {
|
|
uint8_t buf[sizeof(struct chrp_header)];
|
|
struct chrp_header header;
|
|
} conv;
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int opt, dump, fd, res, i, size;
|
|
uint8_t buf[NVRAM_SIZE], *cp, *common;
|
|
struct deletelist *dl;
|
|
|
|
dump = 0;
|
|
dl = NULL;
|
|
|
|
while((opt = getopt(argc, argv, "d:p")) != -1) {
|
|
switch(opt) {
|
|
case 'p':
|
|
dump = 1;
|
|
break;
|
|
|
|
case 'd':
|
|
if (dl == NULL) {
|
|
dl = malloc(sizeof(*dl));
|
|
if (dl == NULL)
|
|
err(1, "malloc");
|
|
bzero(dl, sizeof(*dl));
|
|
dl->last = dl;
|
|
} else {
|
|
dl->last->next = malloc(sizeof(*dl));
|
|
if (dl->last->next == NULL)
|
|
err(1, "malloc");
|
|
dl->last = dl->last->next;
|
|
bzero(dl->last, sizeof(*dl));
|
|
}
|
|
dl->last->name = optarg;
|
|
break;
|
|
|
|
default:
|
|
usage();
|
|
/* Not reached */
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc == 0 && dump == 0 && dl == NULL) {
|
|
usage();
|
|
/* Not reached */
|
|
}
|
|
|
|
fd = open(DEVICE_NAME, O_RDWR);
|
|
if (fd == -1)
|
|
err(1, DEVICE_NAME);
|
|
for (i = 0; i < (int)sizeof(buf);) {
|
|
res = read(fd, buf + i, sizeof(buf) - i);
|
|
if (res == -1 && errno != EINTR)
|
|
err(1, DEVICE_NAME);
|
|
if (res == 0)
|
|
break;
|
|
if (res > 0)
|
|
i += res;
|
|
}
|
|
if (i != sizeof(buf))
|
|
errx(1, "%s: short read", DEVICE_NAME);
|
|
|
|
/* Locate common block */
|
|
size = 0;
|
|
for (cp = buf; cp < buf + sizeof(buf); cp += size) {
|
|
memcpy(conv.buf, cp, sizeof(struct chrp_header));
|
|
size = conv.header.length * 0x10;
|
|
if (strncmp(conv.header.name, "common", 7) == 0)
|
|
break;
|
|
}
|
|
if (cp >= buf + sizeof(buf) || size <= (int)sizeof(struct chrp_header))
|
|
errx(1, "%s: no common block", DEVICE_NAME);
|
|
common = cp + sizeof(struct chrp_header);
|
|
size -= sizeof(struct chrp_header);
|
|
|
|
if (dump != 0) {
|
|
while (size > 0) {
|
|
i = strlen(common) + 1;
|
|
if (i == 1)
|
|
break;
|
|
printf("%s\n", common);
|
|
size -= i;
|
|
common += i;
|
|
}
|
|
exit(0);
|
|
}
|
|
|
|
for (;dl != NULL; dl = dl->next) {
|
|
if (remove_var(common, size, dl->name) == 0)
|
|
warnx("%s: no such variable", dl->name);
|
|
}
|
|
|
|
for (; argc > 0; argc--, argv++) {
|
|
cp = strchr(*argv, '=');
|
|
if (cp == NULL)
|
|
errx(1, "%s: invalid argument", *argv);
|
|
cp[0] = '\0';
|
|
cp++;
|
|
remove_var(common, size, *argv);
|
|
if (append_var(common, size, *argv, cp) == -1)
|
|
errx(1, "%s: error setting variable", *argv);
|
|
}
|
|
|
|
for (i = 0; i < (int)sizeof(buf);) {
|
|
res = write(fd, buf + i, sizeof(buf) - i);
|
|
if (res == -1 && errno != EINTR)
|
|
err(1, DEVICE_NAME);
|
|
if (res == 0)
|
|
break;
|
|
if (res > 0)
|
|
i += res;
|
|
}
|
|
if (i != sizeof(buf))
|
|
errx(1, "%s: short write", DEVICE_NAME);
|
|
if (close(fd) == -1)
|
|
err(1, DEVICE_NAME);
|
|
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr, "usage: nvram [-p] | [-d name ...] [name=value ...]\n");
|
|
exit(1);
|
|
}
|
|
|
|
static int
|
|
remove_var(uint8_t *buf, int len, const char *var_name)
|
|
{
|
|
int nremoved, i, name_len;
|
|
|
|
nremoved = 0;
|
|
name_len = strlen(var_name);
|
|
while (len > 0) {
|
|
i = strlen(buf) + 1;
|
|
if (i == 1)
|
|
break;
|
|
if (strncmp(buf, var_name, name_len) == 0 && buf[name_len] == '=') {
|
|
memmove(buf, buf + i, len - i);
|
|
memset(buf + len - i, '\0', i);
|
|
nremoved += 1;
|
|
continue;
|
|
}
|
|
len -= i;
|
|
buf += i;
|
|
}
|
|
return nremoved;
|
|
}
|
|
|
|
static int
|
|
append_var(uint8_t *buf, int len, const char *var_name, const char *var_value)
|
|
{
|
|
int i, append_len;
|
|
|
|
while (len > 0) {
|
|
i = strlen(buf) + 1;
|
|
if (i == 1)
|
|
break;
|
|
len -= i;
|
|
buf += i;
|
|
}
|
|
append_len = strlen(var_name) + strlen(var_value) + 2;
|
|
if (len < append_len)
|
|
return -1;
|
|
sprintf(buf, "%s=%s", var_name, var_value);
|
|
return 0;
|
|
}
|