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/*-
* Copyright (c) 2016 Netflix, Inc.
*
* 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 <ctype.h>
#include <efivar.h>
#include <efivar-dp.h>
#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define MAXSIZE 65536 /* Everyting will be smaller than this, most 1000x smaller */
/* options descriptor */
static struct option longopts[] = {
{ "to-unix", no_argument, NULL, 'u' },
{ "to-efi", no_argument, NULL, 'e' },
{ "format", no_argument, NULL, 'f' },
{ "parse", no_argument, NULL, 'p' },
{ NULL, 0, NULL, 0 }
};
static int flag_format, flag_parse, flag_unix, flag_efi;
static void
usage(void)
{
errx(1, "efidp [-efpu]");
}
static ssize_t
read_file(int fd, void **rv)
{
uint8_t *retval;
size_t len;
off_t off;
ssize_t red;
len = MAXSIZE;
off = 0;
retval = malloc(len);
do {
red = read(fd, retval + off, len - off);
if (red == 0)
break;
off += red;
if (off == (off_t)len)
break;
} while (1);
*rv = retval;
return off;
}
static void
parse_args(int argc, char **argv)
{
int ch;
while ((ch = getopt_long(argc, argv, "efpu",
longopts, NULL)) != -1) {
switch (ch) {
case 'e':
flag_efi++;
break;
case 'f':
flag_format++;
break;
case 'p':
flag_parse++;
break;
case 'u':
flag_unix++;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc >= 1)
usage();
if (flag_parse + flag_format + flag_efi + flag_unix != 1) {
warnx("Can only use one of -p (--parse), "
"and -f (--format)");
usage();
}
}
static char *
trim(char *s)
{
char *t;
while (isspace(*s))
s++;
t = s + strlen(s) - 1;
while (t > s && isspace(*t))
*t-- = '\0';
return s;
}
static void
unix_to_efi(void)
{
char buffer[MAXSIZE];
char efi[MAXSIZE];
efidp dp;
char *walker;
int rv;
dp = NULL;
while (fgets(buffer, sizeof(buffer), stdin)) {
walker= trim(buffer);
free(dp);
dp = NULL;
rv = efivar_unix_path_to_device_path(walker, &dp);
if (rv != 0 || dp == NULL) {
errno = rv;
warn("Can't convert '%s' to efi", walker);
continue;
}
if (efidp_format_device_path(efi, sizeof(efi),
dp, efidp_size(dp)) < 0) {
warnx("Can't format dp for '%s'", walker);
continue;
}
printf("%s\n", efi);
}
free(dp);
}
static void
efi_to_unix(void)
{
char buffer[MAXSIZE];
char dpbuf[MAXSIZE];
efidp dp;
size_t dplen;
char *walker, *dev, *relpath, *abspath;
int rv;
dp = (efidp)dpbuf;
while (fgets(buffer, sizeof(buffer), stdin)) {
walker= trim(buffer);
dplen = efidp_parse_device_path(walker, dp, sizeof(dpbuf));
rv = efivar_device_path_to_unix_path(dp, &dev, &relpath, &abspath);
if (rv == 0)
printf("%s:%s %s\n", dev, relpath, abspath);
else {
errno = rv;
warn("Can't convert '%s' to unix", walker);
}
}
}
static void
format(void)
{
char buffer[MAXSIZE];
ssize_t fmtlen;
ssize_t len;
void *data;
size_t dplen;
const_efidp dp;
len = read_file(STDIN_FILENO, &data);
if (len == -1)
err(1, "read");
dp = (const_efidp)data;
while (len > 0) {
dplen = efidp_size(dp);
fmtlen = efidp_format_device_path(buffer, sizeof(buffer),
dp, dplen);
if (fmtlen > 0)
printf("%s\n", buffer);
len -= dplen;
dp = (const_efidp)((const char *)dp + dplen);
}
free(data);
}
static void
parse(void)
{
char buffer[MAXSIZE];
efidp dp;
ssize_t dplen;
char *walker;
dplen = MAXSIZE;
dp = malloc(dplen);
if (dp == NULL)
errx(1, "Can't allocate memory.");
while (fgets(buffer, sizeof(buffer), stdin)) {
walker= trim(buffer);
dplen = efidp_parse_device_path(walker, dp, dplen);
if (dplen == -1)
errx(1, "Can't parse %s", walker);
write(STDOUT_FILENO, dp, dplen);
}
free(dp);
}
int
main(int argc, char **argv)
{
parse_args(argc, argv);
if (flag_unix)
efi_to_unix();
else if (flag_efi)
unix_to_efi();
else if (flag_format)
format();
else if (flag_parse)
parse();
}
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