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/*
* Copyright (C) 2008 The Android Open Source Project
* Copyright (C) 2015 Christopher N. Hesse <raymanfx@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "modemloader"
#define LOG_NDEBUG 0
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/un.h>
#include <cutils/properties.h>
#include <cutils/log.h>
void parse_hardware_revision(unsigned int *revision)
{
const char *cpuinfo = "/proc/cpuinfo";
char *data = NULL;
size_t len = 0, limit = 1024;
int fd, n;
char *x, *rev;
fd = open(cpuinfo, O_RDONLY);
if (fd < 0) return;
for (;;) {
x = (char*)realloc(data, limit);
if (!x) {
ALOGE("Failed to allocate memory to read %s\n", cpuinfo);
goto done;
}
data = x;
n = read(fd, data + len, limit - len);
if (n < 0) {
ALOGE("Failed reading %s: %s (%d)\n", cpuinfo, strerror(errno), errno);
goto done;
}
len += n;
if (len < limit)
break;
/* We filled the buffer, so increase size and loop to read more */
limit *= 2;
}
data[len] = 0;
rev = strstr(data, "\nRevision");
if (rev) {
x = strstr(rev, ": ");
if (x) {
*revision = strtoul(x + 2, 0, 16);
}
}
done:
close(fd);
free(data);
}
int main(void)
{
unsigned int revision = 0;
char ro_revision[PROP_VALUE_MAX];
parse_hardware_revision(&revision);
snprintf(ro_revision, PROP_VALUE_MAX, "%d", revision);
property_set("hw.revision", ro_revision);
return 0;
}
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