1 files changed, 0 insertions, 110 deletions
diff --git a/chip/host/persistence.c b/chip/host/persistence.c
deleted file mode 100644
index 44d60f1bb8..0000000000
--- a/chip/host/persistence.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/* 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 */
-
-/* This provides storage that can be opened, closed and reopened by the
- * current process at will, whose naming even remains stable across multiple
- * invocations of the same executable, while providing a unique name for
- * each executable (as determined by path) that uses these routines.
- *
- * Useful when semi-permanent storage is required even with many
- * similar processes running in parallel (e.g. in a highly parallel
- * test suite run.
- *
- * mkstemp and friends don't provide these properties which is why we have
- * this homegrown implementation of something similar-yet-different.
- */
-
-#include <linux/limits.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <string.h>
-
-#include "util.h"
-
-/* The longest path in a chroot seems to be about 280 characters (as of
- * April 2021) so define a cut-off instead of just hoping for the best:
- * If we were to run into a path that is nearly PATH_MAX bytes long,
- * file names could end up being reused inadvertedly because the various
- * snprintf calls would cut off the trailing characters, so the "tag" (and
- * maybe more) is gone even though it only exists for differentiation.
- *
- * Instead bail out if we encounter a path (to an executable using these
- * routines) that is longer than we expect.
- *
- * Round up for some spare room because why not?
- */
-static const int max_len = 300;
-
-/* This must be at least the size of the prefix added in get_storage_path */
-static const int max_prefix_len = 25;
-
-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';
-
-	ASSERT(sz <= max_len);
-
-	/* replace / by underscores in the path to get the shared memory name */
-	current = strchr(buf, '/');
-	while (current) {
-		*current = '_';
-		current = strchr(current, '/');
-	}
-
-
-	sz = snprintf(out, PATH_MAX - 1, "/dev/shm/EC_persist_%.*s",
-		max_len, buf);
-	out[PATH_MAX - 1] = '\0';
-
-	ASSERT(sz <= max_len + max_prefix_len);
-}
-
-FILE *get_persistent_storage(const char *tag, const char *mode)
-{
-	char buf[PATH_MAX];
-	char path[PATH_MAX];
-
-	/* There's no longer tag in use right now, and there shouldn't be. */
-	ASSERT(strlen(tag) < 32);
-
-	/*
-	 * 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_%32s",
-		max_len + max_prefix_len, 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];
-
-	/* There's no longer tag in use right now, and there shouldn't be. */
-	ASSERT(strlen(tag) < 32);
-
-	get_storage_path(buf);
-	snprintf(path, PATH_MAX - 1, "%.*s_%32s",
-		max_len + max_prefix_len, buf, tag);
-	path[PATH_MAX - 1] = '\0';
-
-	unlink(path);
-}