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#include "fstat.h"
#include "file.h"
#include <sys/stat.h>
#include <util/folder/path.h>
#include <cerrno>
#if defined(_win_)
#include "fs_win.h"
#ifdef _S_IFLNK
#undef _S_IFLNK
#endif
#define _S_IFLNK 0x80000000
ui32 GetFileMode(DWORD fileAttributes) {
ui32 mode = 0;
if (fileAttributes == 0xFFFFFFFF)
return mode;
if (fileAttributes & FILE_ATTRIBUTE_DEVICE)
mode |= _S_IFCHR;
if (fileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
mode |= _S_IFLNK; // todo: was undefined by the moment of writing this code
if (fileAttributes & FILE_ATTRIBUTE_DIRECTORY)
mode |= _S_IFDIR;
if (fileAttributes & (FILE_ATTRIBUTE_NORMAL | FILE_ATTRIBUTE_ARCHIVE))
mode |= _S_IFREG;
if ((fileAttributes & FILE_ATTRIBUTE_READONLY) == 0)
mode |= _S_IWRITE;
return mode;
}
#define S_ISDIR(st_mode) (st_mode & _S_IFDIR)
#define S_ISREG(st_mode) (st_mode & _S_IFREG)
#define S_ISLNK(st_mode) (st_mode & _S_IFLNK)
using TSystemFStat = BY_HANDLE_FILE_INFORMATION;
#else
using TSystemFStat = struct stat;
#endif
static void MakeStat(TFileStat& st, const TSystemFStat& fs) {
#ifdef _unix_
st.Mode = fs.st_mode;
st.NLinks = fs.st_nlink;
st.Uid = fs.st_uid;
st.Gid = fs.st_gid;
st.Size = fs.st_size;
st.AllocationSize = fs.st_blocks * 512;
st.ATime = fs.st_atime;
st.MTime = fs.st_mtime;
st.CTime = fs.st_ctime;
st.INode = fs.st_ino;
#else
timeval tv;
FileTimeToTimeval(&fs.ftCreationTime, &tv);
st.CTime = tv.tv_sec;
FileTimeToTimeval(&fs.ftLastAccessTime, &tv);
st.ATime = tv.tv_sec;
FileTimeToTimeval(&fs.ftLastWriteTime, &tv);
st.MTime = tv.tv_sec;
st.NLinks = fs.nNumberOfLinks;
st.Mode = GetFileMode(fs.dwFileAttributes);
st.Uid = 0;
st.Gid = 0;
st.Size = ((ui64)fs.nFileSizeHigh << 32) | fs.nFileSizeLow;
st.AllocationSize = st.Size; // FIXME
st.INode = ((ui64)fs.nFileIndexHigh << 32) | fs.nFileIndexLow;
#endif
}
static bool GetStatByHandle(TSystemFStat& fs, FHANDLE f) {
#ifdef _win_
return GetFileInformationByHandle(f, &fs);
#else
return !fstat(f, &fs);
#endif
}
static bool GetStatByName(TSystemFStat& fs, const char* fileName, bool nofollow) {
#ifdef _win_
TFileHandle h = NFsPrivate::CreateFileWithUtf8Name(fileName, FILE_READ_ATTRIBUTES | FILE_READ_EA, FILE_SHARE_READ | FILE_SHARE_WRITE,
OPEN_EXISTING,
(nofollow ? FILE_FLAG_OPEN_REPARSE_POINT : 0) | FILE_FLAG_BACKUP_SEMANTICS, true);
if (!h.IsOpen()) {
return false;
}
return GetStatByHandle(fs, h);
#else
return !(nofollow ? lstat : stat)(fileName, &fs);
#endif
}
TFileStat::TFileStat() = default;
TFileStat::TFileStat(const TFile& f) {
*this = TFileStat(f.GetHandle());
}
TFileStat::TFileStat(FHANDLE f) {
TSystemFStat st;
if (GetStatByHandle(st, f)) {
MakeStat(*this, st);
} else {
*this = TFileStat();
}
}
void TFileStat::MakeFromFileName(const char* fileName, bool nofollow) {
TSystemFStat st;
if (GetStatByName(st, fileName, nofollow)) {
MakeStat(*this, st);
} else {
*this = TFileStat();
}
}
TFileStat::TFileStat(const TFsPath& fileName, bool nofollow) {
MakeFromFileName(fileName.GetPath().data(), nofollow);
}
TFileStat::TFileStat(const TString& fileName, bool nofollow) {
MakeFromFileName(fileName.data(), nofollow);
}
TFileStat::TFileStat(const char* fileName, bool nofollow) {
MakeFromFileName(fileName, nofollow);
}
bool TFileStat::IsNull() const noexcept {
return *this == TFileStat();
}
bool TFileStat::IsFile() const noexcept {
return S_ISREG(Mode);
}
bool TFileStat::IsDir() const noexcept {
return S_ISDIR(Mode);
}
bool TFileStat::IsSymlink() const noexcept {
return S_ISLNK(Mode);
}
bool operator==(const TFileStat& l, const TFileStat& r) noexcept {
return l.Mode == r.Mode &&
l.Uid == r.Uid &&
l.Gid == r.Gid &&
l.NLinks == r.NLinks &&
l.Size == r.Size &&
l.ATime == r.ATime &&
l.MTime == r.MTime &&
l.CTime == r.CTime;
}
bool operator!=(const TFileStat& l, const TFileStat& r) noexcept {
return !(l == r);
}
i64 GetFileLength(FHANDLE fd) {
#if defined(_win_)
LARGE_INTEGER pos;
if (!::GetFileSizeEx(fd, &pos))
return -1L;
return pos.QuadPart;
#elif defined(_unix_)
struct stat statbuf;
if (::fstat(fd, &statbuf) != 0) {
return -1L;
}
if (!(statbuf.st_mode & (S_IFREG | S_IFBLK | S_IFCHR))) {
// st_size only makes sense for regular files or devices
errno = EINVAL;
return -1L;
}
return statbuf.st_size;
#else
#error unsupported platform
#endif
}
i64 GetFileLength(const char* name) {
#if defined(_win_)
WIN32_FIND_DATA fData;
HANDLE h = FindFirstFileA(name, &fData);
if (h == INVALID_HANDLE_VALUE)
return -1;
FindClose(h);
return (((i64)fData.nFileSizeHigh) * (i64(MAXDWORD) + 1)) + (i64)fData.nFileSizeLow;
#elif defined(_unix_)
struct stat buf;
int r = ::stat(name, &buf);
if (r == -1) {
return -1;
}
if (!(buf.st_mode & (S_IFREG | S_IFBLK | S_IFCHR))) {
// st_size only makes sense for regular files or devices
errno = EINVAL;
return -1;
}
return (i64)buf.st_size;
#else
#error unsupported platform
#endif
}
i64 GetFileLength(const TString& name) {
return GetFileLength(name.data());
}
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