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/*
* Copyright (C) 2021 Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include "compatible_devices.h"
static int board_is_compatible(void)
{
return false;
}
static int dt_is_compatible(void)
{
int fd;
int rc;
off_t len;
ssize_t count;
char *buf;
char *path = "/sys/firmware/devicetree/base/compatible";
fd = open(path, O_RDONLY);
if (fd == -1) {
rc = errno;
if (rc != ENOENT)
printf("%s: Opening %s failed with error %d: %s\n",
__func__, path, rc, strerror(rc));
return false;
}
len = lseek(fd, 0, SEEK_END);
if (len == -1) {
rc = errno;
printf("%s: lseek to SEEK_END on %s failed with error %d: %s\n",
__func__, path, rc, strerror(rc));
return false;
}
rc = lseek(fd, 0, SEEK_SET);
if (rc == -1) {
rc = errno;
printf("%s: lseek to 0 on %s failed with error %d: %s\n",
__func__, path, rc, strerror(rc));
return false;
}
/* Make sure we at least have a trailing \0 to simplify the code */
buf = malloc(len + 1);
if (buf == NULL) {
rc = errno;
printf("%s: Malloc failed with error %d: %s\n",
__func__, rc, strerror(rc));
return false;
}
/* Make sure we at least have a trailing \0 */
buf[len] = '\0';
do {
count = read(fd, buf, len);
if (count == -1) {
rc = errno;
printf("%s: Reading %s failed with error %d: %s\n",
__func__, path, rc, strerror(rc));
return false;
}
len -= count;
} while(len);
if (!strcmp(buf, "samsung,i9300"))
return true;
free(buf);
return false;
}
int device_is_compatible(void)
{
if (dt_is_compatible())
return true;
if (board_is_compatible())
return true;
return false;
}
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