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