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tdlib-fork/tdutils/td/utils/port/Stat.cpp

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/utils/port/Stat.h"
#include "td/utils/port/FileFd.h"
#if TD_PORT_POSIX
#include "td/utils/format.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/port/Clocks.h"
#include "td/utils/ScopeGuard.h"
#if TD_DARWIN
#include <mach/mach.h>
#include <sys/time.h>
#endif
// We don't want warnings from system headers
#if TD_GCC
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif
#include <sys/stat.h>
#if TD_GCC
#pragma GCC diagnostic pop
#endif
#if TD_ANDROID || TD_TIZEN
#include <sys/syscall.h>
#endif
namespace td {
namespace detail {
Stat from_native_stat(const struct ::stat &buf) {
Stat res;
#if TD_DARWIN
res.mtime_nsec_ = buf.st_mtimespec.tv_sec * 1000000000ll + buf.st_mtimespec.tv_nsec; // khm
res.atime_nsec_ = buf.st_atimespec.tv_sec * 1000000000ll + buf.st_atimespec.tv_nsec;
#else
#if defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || _POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700 || TD_EMSCRIPTEN
res.mtime_nsec_ = buf.st_mtime * 1000000000ll + buf.st_mtim.tv_nsec;
res.atime_nsec_ = buf.st_atime * 1000000000ll + buf.st_atim.tv_nsec;
#else
res.mtime_nsec_ = buf.st_mtime * 1000000000ll + buf.st_mtimensec;
res.atime_nsec_ = buf.st_atime * 1000000000ll + buf.st_atimensec;
#endif
#endif
res.size_ = buf.st_size;
res.is_dir_ = (buf.st_mode & S_IFMT) == S_IFDIR;
res.is_reg_ = (buf.st_mode & S_IFMT) == S_IFREG;
res.mtime_nsec_ /= 1000;
res.mtime_nsec_ *= 1000;
return res;
}
Stat fstat(int native_fd) {
struct ::stat buf;
int err = fstat(native_fd, &buf);
auto fstat_errno = errno;
LOG_IF(FATAL, err < 0) << Status::PosixError(fstat_errno, PSLICE() << "stat for fd " << native_fd << " failed");
return detail::from_native_stat(buf);
}
Status update_atime(int native_fd) {
#if TD_LINUX
timespec times[2];
// access time
times[0].tv_nsec = UTIME_NOW;
// modify time
times[1].tv_nsec = UTIME_OMIT;
// if (utimensat(native_fd, nullptr, times, 0) < 0) {
if (futimens(native_fd, times) < 0) {
auto status = OS_ERROR(PSLICE() << "futimens " << tag("fd", native_fd));
LOG(WARNING) << status;
return status;
}
return Status::OK();
#elif TD_DARWIN
auto info = fstat(native_fd);
timeval upd[2];
auto now = Clocks::system();
// access time
upd[0].tv_sec = static_cast<decltype(upd[0].tv_sec)>(now);
upd[0].tv_usec = static_cast<decltype(upd[0].tv_usec)>((now - static_cast<double>(upd[0].tv_sec)) * 1000000);
// modify time
upd[1].tv_sec = static_cast<decltype(upd[1].tv_sec)>(info.mtime_nsec_ / 1000000000ll);
upd[1].tv_usec = static_cast<decltype(upd[1].tv_usec)>(info.mtime_nsec_ % 1000000000ll / 1000);
if (futimes(native_fd, upd) < 0) {
auto status = OS_ERROR(PSLICE() << "futimes " << tag("fd", native_fd));
LOG(WARNING) << status;
return status;
}
return Status::OK();
#else
return Status::Error("Not supported");
// timespec times[2];
//// access time
// times[0].tv_nsec = UTIME_NOW;
//// modify time
// times[1].tv_nsec = UTIME_OMIT;
//// int err = syscall(__NR_utimensat, native_fd, nullptr, times, 0);
// if (futimens(native_fd, times) < 0) {
// auto status = OS_ERROR(PSLICE() << "futimens " << tag("fd", native_fd));
// LOG(WARNING) << status;
// return status;
// }
// return Status::OK();
#endif
}
} // namespace detail
Status update_atime(CSlice path) {
TRY_RESULT(file, FileFd::open(path, FileFd::Flags::Read));
SCOPE_EXIT {
file.close();
};
return detail::update_atime(file.get_native_fd());
}
Result<Stat> stat(CSlice path) {
struct ::stat buf;
if (stat(path.c_str(), &buf) < 0) {
return OS_ERROR(PSLICE() << "stat for " << tag("file", path) << " failed");
}
return detail::from_native_stat(buf);
}
Result<MemStat> mem_stat() {
#if TD_DARWIN
task_basic_info t_info;
mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
if (KERN_SUCCESS !=
task_info(mach_task_self(), TASK_BASIC_INFO, reinterpret_cast<task_info_t>(&t_info), &t_info_count)) {
return Status::Error("task_info failed");
}
MemStat res;
res.resident_size_ = t_info.resident_size;
res.virtual_size_ = t_info.virtual_size;
res.resident_size_peak_ = 0;
res.virtual_size_peak_ = 0;
return res;
#elif TD_LINUX || TD_ANDROID || TD_TIZEN
TRY_RESULT(fd, FileFd::open("/proc/self/status", FileFd::Read));
SCOPE_EXIT {
fd.close();
};
constexpr int TMEM_SIZE = 10000;
char mem[TMEM_SIZE];
TRY_RESULT(size, fd.read(MutableSlice(mem, TMEM_SIZE - 1)));
CHECK(size < TMEM_SIZE - 1);
mem[size] = 0;
const char *s = mem;
MemStat res;
while (*s) {
const char *name_begin = s;
while (*s != 0 && *s != '\n') {
s++;
}
auto name_end = name_begin;
while (is_alpha(*name_end)) {
name_end++;
}
Slice name(name_begin, name_end);
uint64 *x = nullptr;
if (name == "VmPeak") {
x = &res.virtual_size_peak_;
}
if (name == "VmSize") {
x = &res.virtual_size_;
}
if (name == "VmHWM") {
x = &res.resident_size_peak_;
}
if (name == "VmRSS") {
x = &res.resident_size_;
}
if (x != nullptr) {
Slice value(name_end, s);
if (!value.empty() && value[0] == ':') {
value.remove_prefix(1);
}
value = trim(value);
value = split(value).first;
auto r_mem = to_integer_safe<uint64>(value);
if (r_mem.is_error()) {
LOG(ERROR) << "Failed to parse memory stats " << tag("name", name) << tag("value", value);
*x = static_cast<uint64>(-1);
} else {
*x = r_mem.ok() * 1024; // memory is in kB
}
}
if (*s == 0) {
break;
}
s++;
}
return res;
#else
return Status::Error("Not supported");
#endif
}
} // namespace td
#endif
#if TD_PORT_WINDOWS
namespace td {
Result<Stat> stat(CSlice path) {
TRY_RESULT(fd, FileFd::open(path, FileFd::Flags::Read));
return fd.stat();
}
} // namespace td
#endif