/*-
* Copyright (c) 2016 Netflix, Inc.
* 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 AND CONTRIBUTORS ``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 <efivar.h>
#include <efivar-dp.h>
#include <err.h>
#include <getopt.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/* options descriptor */
static struct option longopts[] = {
{ "format", no_argument, NULL, 'f' },
{ "parse", no_argument, NULL, 'p' },
{ NULL, 0, NULL, 0 }
};
static int flag_format, flag_parse;
static void
usage(void)
{
errx(1, "efidp [-fp]");
}
static ssize_t
read_file(int fd, void **rv)
{
uint8_t *retval;
size_t len;
off_t off;
ssize_t red;
len = 4096;
off = 0;
retval = malloc(len);
do {
red = read(fd, retval + off, len - off);
off += red;
if (red < (ssize_t)(len - off))
break;
len *= 2;
retval = reallocf(retval, len);
if (retval == NULL)
return -1;
} while (1);
*rv = retval;
return off;
}
static void
parse_args(int argc, char **argv)
{
int ch;
while ((ch = getopt_long(argc, argv, "fp",
longopts, NULL)) != -1) {
switch (ch) {
case 'f':
flag_format++;
break;
case 'p':
flag_parse++;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc >= 1)
usage();
if (flag_parse + flag_format != 1) {
warnx("Can only use one of -p (--parse), "
"and -f (--format)");
usage();
}
}
int
main(int argc, char **argv)
{
void *data;
ssize_t len;
parse_args(argc, argv);
len = read_file(STDIN_FILENO, &data);
if (len == -1)
err(1, "read");
if (flag_format) {
char buffer[4096];
ssize_t fmtlen;
fmtlen = efidp_format_device_path(buffer, sizeof(buffer),
(const_efidp)data, len);
if (fmtlen > 0)
printf("%s\n", buffer);
free(data);
} else if (flag_parse) {
efidp dp;
ssize_t dplen;
char *str;
dp = malloc(8192);
str = realloc(data, len + 1);
if (str == NULL || dp == NULL)
errx(1, "Can't allocate memory.");
str[len] = '\0';
dplen = efidp_parse_device_path(str, dp, 8192);
if (dplen == -1)
errx(1, "Can't parse %s", str);
write(STDOUT_FILENO, dp, dplen);
}
}
