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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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.
#include <libproc.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <CoreFoundation/CoreFoundation.h>
#include <cstdio>
#include "src/main/cpp/blaze_util.h"
#include "src/main/cpp/blaze_util_platform.h"
#include "src/main/cpp/util/errors.h"
#include "src/main/cpp/util/exit_code.h"
#include "src/main/cpp/util/file.h"
#include "src/main/cpp/util/strings.h"
namespace blaze {
using blaze_util::die;
using blaze_util::pdie;
using std::string;
using std::vector;
// A stack based class for RAII type handling of CF based types that need
// CFRelease called on them. Checks for NULL before calling release.
template <typename T> class CFScopedReleaser {
public:
explicit CFScopedReleaser(T value) : value_(value) { }
~CFScopedReleaser() {
if (isValid()) {
CFRelease(value_);
}
}
T get() { return value_; }
operator T() { return value_; }
bool isValid() { return value_ != NULL; }
private:
T value_;
CFScopedReleaser() { }
CFScopedReleaser(const CFScopedReleaser&);
CFScopedReleaser& operator=(CFScopedReleaser&);
};
// Convert a CFStringRef to a UTF8 encoded c string
static string UTF8StringFromCFStringRef(CFStringRef cf_string) {
std::string utf8_string;
if (cf_string) {
CFIndex length = CFStringGetLength(cf_string);
CFIndex max_size =
CFStringGetMaximumSizeForEncoding(length, kCFStringEncodingUTF8) + 1;
vector<char> buffer(max_size);
if (CFStringGetCString(cf_string, &buffer[0], max_size,
kCFStringEncodingUTF8)) {
utf8_string = &buffer[0];
}
}
return utf8_string;
}
// Extract description from a CFError.
static string DescriptionFromCFError(CFErrorRef cf_err) {
if (!cf_err) {
return "";
}
CFScopedReleaser<CFStringRef> cf_err_string(CFErrorCopyDescription(cf_err));
return UTF8StringFromCFStringRef(cf_err_string);
}
string GetOutputRoot() {
return "/var/tmp";
}
void WarnFilesystemType(const string& output_base) {
// Check to see if we are on a non-local drive.
CFScopedReleaser<CFURLRef> cf_url(CFURLCreateFromFileSystemRepresentation(
kCFAllocatorDefault, reinterpret_cast<const UInt8 *>(output_base.c_str()),
output_base.length(), true));
CFBooleanRef cf_local = NULL;
CFErrorRef cf_error = NULL;
if (!cf_url.isValid() ||
!CFURLCopyResourcePropertyForKey(cf_url, kCFURLVolumeIsLocalKey,
&cf_local, &cf_error)) {
CFScopedReleaser<CFErrorRef> cf_error_releaser(cf_error);
string error_desc = DescriptionFromCFError(cf_error_releaser);
fprintf(stderr, "Warning: couldn't get file system type information for "
"'%s'", output_base.c_str());
if (error_desc.length() > 0) {
fprintf(stderr, " - '%s'", error_desc.c_str());
}
fprintf(stderr, "\n");
return;
}
CFScopedReleaser<CFBooleanRef> cf_local_releaser(cf_local);
if (!CFBooleanGetValue(cf_local_releaser)) {
fprintf(stderr, "Warning: Output base '%s' is on a non-local drive. This "
"may lead to surprising failures and undetermined behavior.\n",
output_base.c_str());
}
}
string GetSelfPath() {
char pathbuf[PROC_PIDPATHINFO_MAXSIZE] = {};
int len = proc_pidpath(getpid(), pathbuf, sizeof(pathbuf));
if (len == 0) {
pdie(blaze_exit_code::INTERNAL_ERROR, "error calling proc_pidpath");
}
return string(pathbuf, len);
}
uint64_t MonotonicClock() {
struct timeval ts = {};
if (gettimeofday(&ts, NULL) < 0) {
pdie(blaze_exit_code::INTERNAL_ERROR, "error calling gettimeofday");
}
return ts.tv_sec * 1000000000LL + ts.tv_usec * 1000;
}
uint64_t ProcessClock() {
return clock() * (1000000000LL / CLOCKS_PER_SEC);
}
void SetScheduling(bool batch_cpu_scheduling, int io_nice_level) {
// stubbed out so we can compile for Darwin.
}
string GetProcessCWD(int pid) {
struct proc_vnodepathinfo info = {};
if (proc_pidinfo(
pid, PROC_PIDVNODEPATHINFO, 0, &info, sizeof(info)) != sizeof(info)) {
return "";
}
return string(info.pvi_cdir.vip_path);
}
bool IsSharedLibrary(const string &filename) {
return blaze_util::ends_with(filename, ".dylib");
}
string GetDefaultHostJavabase() {
const char *java_home = getenv("JAVA_HOME");
if (java_home) {
return std::string(java_home);
}
FILE *output = popen("/usr/libexec/java_home -v 1.7+", "r");
if (output == NULL) {
pdie(blaze_exit_code::LOCAL_ENVIRONMENTAL_ERROR,
"Could not run /usr/libexec/java_home");
}
char buf[512];
char *result = fgets(buf, sizeof(buf), output);
pclose(output);
if (result == NULL) {
die(blaze_exit_code::LOCAL_ENVIRONMENTAL_ERROR,
"No output from /usr/libexec/java_home");
}
string javabase = buf;
if (javabase.empty()) {
die(blaze_exit_code::LOCAL_ENVIRONMENTAL_ERROR,
"Empty output from /usr/libexec/java_home - "
"install a JDK, or install a JRE and point your JAVA_HOME to it");
}
// The output ends with a \n, trim it off.
return javabase.substr(0, javabase.length()-1);
}
void WriteSystemSpecificProcessIdentifier(const string& server_dir) {
}
bool VerifyServerProcess(
int pid, const string& output_base, const string& install_base) {
// TODO(lberki): This might accidentally kill an unrelated process if the
// server died and the PID got reused.
return true;
}
bool KillServerProcess(int pid) {
killpg(pid, SIGKILL);
return true;
}
// Sets a flag on path to exclude the path from Apple's automatic backup service
// (Time Machine)
void ExcludePathFromBackup(const string &path) {
CFScopedReleaser<CFURLRef> cf_url(CFURLCreateFromFileSystemRepresentation(
kCFAllocatorDefault, reinterpret_cast<const UInt8 *>(path.c_str()),
path.length(), true));
if (!cf_url.isValid()) {
fprintf(stderr, "Warning: unable to exclude '%s' from backups\n",
path.c_str());
return;
}
CFErrorRef cf_error = NULL;
if (!CFURLSetResourcePropertyForKey(cf_url, kCFURLIsExcludedFromBackupKey,
kCFBooleanTrue, &cf_error)) {
CFScopedReleaser<CFErrorRef> cf_error_releaser(cf_error);
string error_desc = DescriptionFromCFError(cf_error_releaser);
fprintf(stderr, "Warning: unable to exclude '%s' from backups",
path.c_str());
if (error_desc.length() > 0) {
fprintf(stderr, " - '%s'", error_desc.c_str());
}
fprintf(stderr, "\n");
return;
}
}
} // namespace blaze.
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