65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
|
/* Copyright 2013 The Chromium OS Authors. All rights reserved.
|
||
|
|
* Use of this source code is governed by a BSD-style license that can be
|
||
|
|
* found in the LICENSE file.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Persistence module for emulator */
|
||
|
|
|
||
|
|
#include <linux/limits.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
static void get_storage_path(char *out)
|
||
|
|
{
|
||
|
|
char buf[PATH_MAX];
|
||
|
|
int sz;
|
||
|
|
char *current;
|
||
|
|
|
||
|
|
sz = readlink("/proc/self/exe", buf, PATH_MAX - 1);
|
||
|
|
buf[sz] = '\0';
|
||
|
|
|
||
|
|
/* replace / by underscores in the path to get the shared memory name */
|
||
|
|
current = strchr(buf, '/');
|
||
|
|
while (current) {
|
||
|
|
*current = '_';
|
||
|
|
current = strchr(current, '/');
|
||
|
|
}
|
||
|
|
|
||
|
|
snprintf(out, PATH_MAX - 1, "/dev/shm/EC_persist_%s", buf);
|
||
|
|
out[PATH_MAX - 1] = '\0';
|
||
|
|
}
|
||
|
|
|
||
|
|
FILE *get_persistent_storage(const char *tag, const char *mode)
|
||
|
|
{
|
||
|
|
char buf[PATH_MAX];
|
||
|
|
char path[PATH_MAX];
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The persistent storage with tag 'foo' for test 'bar' would
|
||
|
|
* be named 'bar_persist_foo'
|
||
|
|
*/
|
||
|
|
get_storage_path(buf);
|
||
|
|
snprintf(path, PATH_MAX - 1, "%s_%s", buf, tag);
|
||
|
|
path[PATH_MAX - 1] = '\0';
|
||
|
|
|
||
|
|
return fopen(path, mode);
|
||
|
|
}
|
||
|
|
|
||
|
|
void release_persistent_storage(FILE *ps)
|
||
|
|
{
|
||
|
|
fclose(ps);
|
||
|
|
}
|
||
|
|
|
||
|
|
void remove_persistent_storage(const char *tag)
|
||
|
|
{
|
||
|
|
char buf[PATH_MAX];
|
||
|
|
char path[PATH_MAX];
|
||
|
|
|
||
|
|
get_storage_path(buf);
|
||
|
|
snprintf(path, PATH_MAX - 1, "%s_%s", buf, tag);
|
||
|
|
path[PATH_MAX - 1] = '\0';
|
||
|
|
|
||
|
|
unlink(path);
|
||
|
|
}
|