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Diffstat (limited to 'sandbox/linux/suid/process_util_linux.c')
-rw-r--r--sandbox/linux/suid/process_util_linux.c80
1 files changed, 0 insertions, 80 deletions
diff --git a/sandbox/linux/suid/process_util_linux.c b/sandbox/linux/suid/process_util_linux.c
deleted file mode 100644
index d28d5766c3..0000000000
--- a/sandbox/linux/suid/process_util_linux.c
+++ /dev/null
@@ -1,80 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// The following is the C version of code from base/process_utils_linux.cc.
-// We shouldn't link against C++ code in a setuid binary.
-
-// Needed for O_DIRECTORY, must be defined before fcntl.h is included
-// (and it can be included earlier than the explicit #include below
-// in some versions of glibc).
-#define _GNU_SOURCE
-
-#include "sandbox/linux/suid/process_util.h"
-
-#include <fcntl.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-// Ranges for the current (oom_score_adj) and previous (oom_adj)
-// flavors of OOM score.
-static const int kMaxOomScore = 1000;
-static const int kMaxOldOomScore = 15;
-
-// NOTE: This is not the only version of this function in the source:
-// the base library (in process_util_linux.cc) also has its own C++ version.
-bool AdjustOOMScore(pid_t process, int score) {
- if (score < 0 || score > kMaxOomScore)
- return false;
-
- char oom_adj[27]; // "/proc/" + log_10(2**64) + "\0"
- // 6 + 20 + 1 = 27
- snprintf(oom_adj, sizeof(oom_adj), "/proc/%" PRIdMAX, (intmax_t)process);
-
- const int dirfd = open(oom_adj, O_RDONLY | O_DIRECTORY);
- if (dirfd < 0)
- return false;
-
- struct stat statbuf;
- if (fstat(dirfd, &statbuf) < 0) {
- close(dirfd);
- return false;
- }
- if (getuid() != statbuf.st_uid) {
- close(dirfd);
- return false;
- }
-
- int fd = openat(dirfd, "oom_score_adj", O_WRONLY);
- if (fd < 0) {
- // We failed to open oom_score_adj, so let's try for the older
- // oom_adj file instead.
- fd = openat(dirfd, "oom_adj", O_WRONLY);
- if (fd < 0) {
- // Nope, that doesn't work either.
- close(dirfd);
- return false;
- } else {
- // If we're using the old oom_adj file, the allowed range is now
- // [0, kMaxOldOomScore], so we scale the score. This may result in some
- // aliasing of values, of course.
- score = score * kMaxOldOomScore / kMaxOomScore;
- }
- }
- close(dirfd);
-
- char buf[11]; // 0 <= |score| <= kMaxOomScore; using log_10(2**32) + 1 size
- snprintf(buf, sizeof(buf), "%d", score);
- size_t len = strlen(buf);
-
- ssize_t bytes_written = write(fd, buf, len);
- close(fd);
- return (bytes_written == (ssize_t)len);
-}