2022-01-29 20:11:21 +00:00
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/*
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** LuaFileSystem
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** Copyright Kepler Project 2003 - 2020
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** (http://keplerproject.github.io/luafilesystem)
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**
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** File system manipulation library.
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** This library offers these functions:
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** lfs.attributes (filepath [, attributename | attributetable])
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** lfs.chdir (path)
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** lfs.currentdir ()
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** lfs.dir (path)
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** lfs.link (old, new[, symlink])
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** lfs.lock (fh, mode)
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** lfs.lock_dir (path)
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** lfs.mkdir (path)
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** lfs.rmdir (path)
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** lfs.setmode (filepath, mode)
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** lfs.symlinkattributes (filepath [, attributename])
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** lfs.touch (filepath [, atime [, mtime]])
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** lfs.unlock (fh)
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*/
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#ifndef LFS_DO_NOT_USE_LARGE_FILE
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#ifndef _WIN32
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#ifndef _AIX
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#define _FILE_OFFSET_BITS 64 /* Linux, Solaris and HP-UX */
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#else
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#define _LARGE_FILES 1 /* AIX */
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#endif
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#endif
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#endif
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#ifdef _WIN32
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#define _WIN32_WINNT 0x600
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#endif
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#ifndef LFS_DO_NOT_USE_LARGE_FILE
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#define _LARGEFILE64_SOURCE
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#endif
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <time.h>
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#include <sys/stat.h>
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#ifdef _WIN32
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#include <direct.h>
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#include <windows.h>
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#include <io.h>
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#include <sys/locking.h>
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#ifdef __BORLANDC__
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#include <utime.h>
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#else
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#include <sys/utime.h>
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#endif
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#include <fcntl.h>
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/* MAX_PATH seems to be 260. Seems kind of small. Is there a better one? */
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#define LFS_MAXPATHLEN MAX_PATH
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#else
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#include <unistd.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <utime.h>
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#include <sys/param.h> /* for MAXPATHLEN */
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#ifdef MAXPATHLEN
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#define LFS_MAXPATHLEN MAXPATHLEN
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#else
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#include <limits.h> /* for _POSIX_PATH_MAX */
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#define LFS_MAXPATHLEN _POSIX_PATH_MAX
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#endif
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#endif
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#include "lua.h"
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#include "lauxlib.h"
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#include "lualib.h"
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#include "lfs.h"
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#define LFS_VERSION "1.8.0"
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#define LFS_LIBNAME "lfs"
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#if LUA_VERSION_NUM >= 503 /* Lua 5.3+ */
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#ifndef luaL_optlong
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#define luaL_optlong luaL_optinteger
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#endif
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#endif
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#if LUA_VERSION_NUM >= 502
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#define new_lib(L, l) (luaL_newlib(L, l))
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#else
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#define new_lib(L, l) (lua_newtable(L), luaL_register(L, NULL, l))
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#endif
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/* Define 'strerror' for systems that do not implement it */
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#ifdef NO_STRERROR
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#define strerror(_) "System unable to describe the error"
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#endif
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#define DIR_METATABLE "directory metatable"
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typedef struct dir_data {
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int closed;
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#ifdef _WIN32
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intptr_t hFile;
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char pattern[MAX_PATH + 1];
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#else
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DIR *dir;
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#endif
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} dir_data;
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#define LOCK_METATABLE "lock metatable"
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#ifdef _WIN32
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#ifdef __BORLANDC__
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#define lfs_setmode(file, m) (setmode(_fileno(file), m))
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#define STAT_STRUCT struct stati64
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#else
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#define lfs_setmode(file, m) (_setmode(_fileno(file), m))
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#define STAT_STRUCT struct _stati64
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#endif
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#ifndef _S_IFLNK
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#define _S_IFLNK 0x400
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#endif
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#ifndef S_ISDIR
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#define S_ISDIR(mode) (mode&_S_IFDIR)
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#endif
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#ifndef S_ISREG
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#define S_ISREG(mode) (mode&_S_IFREG)
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#endif
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#ifndef S_ISLNK
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#define S_ISLNK(mode) (mode&_S_IFLNK)
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#endif
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#ifndef S_ISSOCK
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#define S_ISSOCK(mode) (0)
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#endif
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#ifndef S_ISFIFO
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#define S_ISFIFO(mode) (0)
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#endif
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#ifndef S_ISCHR
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#define S_ISCHR(mode) (mode&_S_IFCHR)
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#endif
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#ifndef S_ISBLK
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#define S_ISBLK(mode) (0)
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#endif
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#define STAT_FUNC _stati64
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#define LSTAT_FUNC lfs_win32_lstat
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#else
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#define _O_TEXT 0
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#define _O_BINARY 0
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#define lfs_setmode(file, m) ((void)file, (void)m, 0)
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#define STAT_STRUCT struct stat
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#define STAT_FUNC stat
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extern int lstat(const char * pathname, struct stat * statbuf);
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#define LSTAT_FUNC lstat
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#endif
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#ifdef _WIN32
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#define lfs_mkdir _mkdir
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#else
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#define lfs_mkdir(path) (mkdir((path), \
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S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IWGRP | S_IXGRP | S_IROTH | S_IXOTH))
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#endif
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#ifdef _WIN32
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int lfs_win32_pusherror(lua_State * L)
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{
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int en = GetLastError();
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lua_pushnil(L);
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if (en == ERROR_FILE_EXISTS || en == ERROR_SHARING_VIOLATION)
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lua_pushstring(L, "File exists");
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else
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lua_pushstring(L, strerror(en));
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return 2;
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}
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#define TICKS_PER_SECOND 10000000
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#define EPOCH_DIFFERENCE 11644473600LL
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time_t windowsToUnixTime(FILETIME ft)
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{
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ULARGE_INTEGER uli;
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uli.LowPart = ft.dwLowDateTime;
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uli.HighPart = ft.dwHighDateTime;
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return (time_t) (uli.QuadPart / TICKS_PER_SECOND - EPOCH_DIFFERENCE);
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}
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int lfs_win32_lstat(const char *path, STAT_STRUCT * buffer)
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{
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WIN32_FILE_ATTRIBUTE_DATA win32buffer;
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if (GetFileAttributesEx(path, GetFileExInfoStandard, &win32buffer)) {
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if (!(win32buffer.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
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return STAT_FUNC(path, buffer);
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}
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buffer->st_mode = _S_IFLNK;
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buffer->st_dev = 0;
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buffer->st_ino = 0;
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buffer->st_nlink = 0;
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buffer->st_uid = 0;
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buffer->st_gid = 0;
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buffer->st_rdev = 0;
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buffer->st_atime = windowsToUnixTime(win32buffer.ftLastAccessTime);
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buffer->st_mtime = windowsToUnixTime(win32buffer.ftLastWriteTime);
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buffer->st_ctime = windowsToUnixTime(win32buffer.ftCreationTime);
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buffer->st_size = 0;
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return 0;
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} else {
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return 1;
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}
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}
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#endif
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/*
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** Utility functions
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*/
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static int pusherror(lua_State * L, const char *info)
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{
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lua_pushnil(L);
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if (info == NULL)
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lua_pushstring(L, strerror(errno));
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else
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lua_pushfstring(L, "%s: %s", info, strerror(errno));
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lua_pushinteger(L, errno);
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return 3;
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}
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static int pushresult(lua_State * L, int res, const char *info)
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{
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if (res == -1) {
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return pusherror(L, info);
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} else {
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lua_pushboolean(L, 1);
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return 1;
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}
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}
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/*
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** Check if the given element on the stack is a file and returns it.
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*/
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static FILE *check_file(lua_State * L, int idx, const char *funcname)
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{
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#if LUA_VERSION_NUM == 501
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FILE **fh = (FILE **) luaL_checkudata(L, idx, "FILE*");
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if (*fh == NULL) {
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luaL_error(L, "%s: closed file", funcname);
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return 0;
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} else
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return *fh;
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#elif LUA_VERSION_NUM >= 502 && LUA_VERSION_NUM <= 504
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luaL_Stream *fh = (luaL_Stream *) luaL_checkudata(L, idx, "FILE*");
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if (fh->closef == 0 || fh->f == NULL) {
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luaL_error(L, "%s: closed file", funcname);
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return 0;
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} else
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return fh->f;
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#else
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#error unsupported Lua version
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#endif
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}
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/*
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**
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*/
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static int _file_lock(lua_State * L, FILE * fh, const char *mode,
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const long start, long len, const char *funcname)
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{
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int code;
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#ifdef _WIN32
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/* lkmode valid values are:
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LK_LOCK Locks the specified bytes. If the bytes cannot be locked,
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the program immediately tries again after 1 second.
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If, after 10 attempts, the bytes cannot be locked,
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the constant returns an error.
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LK_NBLCK Locks the specified bytes. If the bytes cannot be locked,
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the constant returns an error.
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LK_NBRLCK Same as _LK_NBLCK.
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LK_RLCK Same as _LK_LOCK.
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LK_UNLCK Unlocks the specified bytes, which must have been
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previously locked.
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Regions should be locked only briefly and should be unlocked
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before closing a file or exiting the program.
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http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt__locking.asp
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*/
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int lkmode;
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switch (*mode) {
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case 'r':
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lkmode = LK_NBLCK;
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break;
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case 'w':
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lkmode = LK_NBLCK;
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break;
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case 'u':
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lkmode = LK_UNLCK;
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break;
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default:
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return luaL_error(L, "%s: invalid mode", funcname);
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}
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if (!len) {
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fseek(fh, 0L, SEEK_END);
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len = ftell(fh);
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}
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fseek(fh, start, SEEK_SET);
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#ifdef __BORLANDC__
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code = locking(fileno(fh), lkmode, len);
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#else
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code = _locking(fileno(fh), lkmode, len);
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#endif
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#else
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struct flock f;
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switch (*mode) {
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case 'w':
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f.l_type = F_WRLCK;
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break;
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case 'r':
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f.l_type = F_RDLCK;
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break;
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case 'u':
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f.l_type = F_UNLCK;
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break;
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default:
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return luaL_error(L, "%s: invalid mode", funcname);
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}
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f.l_whence = SEEK_SET;
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f.l_start = (off_t) start;
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f.l_len = (off_t) len;
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code = fcntl(fileno(fh), F_SETLK, &f);
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#endif
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return (code != -1);
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}
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#ifdef _WIN32
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typedef struct lfs_Lock {
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HANDLE fd;
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} lfs_Lock;
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static int lfs_lock_dir(lua_State * L)
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{
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size_t pathl;
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HANDLE fd;
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lfs_Lock *lock;
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char *ln;
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const char *lockfile = "/lockfile.lfs";
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const char *path = luaL_checklstring(L, 1, &pathl);
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ln = (char *) malloc(pathl + strlen(lockfile) + 1);
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if (!ln) {
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lua_pushnil(L);
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lua_pushstring(L, strerror(errno));
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return 2;
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}
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strcpy(ln, path);
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strcat(ln, lockfile);
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fd = CreateFile(ln, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS,
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FILE_ATTRIBUTE_NORMAL | FILE_FLAG_DELETE_ON_CLOSE, NULL);
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free(ln);
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if (fd == INVALID_HANDLE_VALUE) {
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return lfs_win32_pusherror(L);
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}
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lock = (lfs_Lock *) lua_newuserdata(L, sizeof(lfs_Lock));
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lock->fd = fd;
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luaL_getmetatable(L, LOCK_METATABLE);
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lua_setmetatable(L, -2);
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|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int lfs_unlock_dir(lua_State * L)
|
|
|
|
{
|
|
|
|
lfs_Lock *lock = (lfs_Lock *) luaL_checkudata(L, 1, LOCK_METATABLE);
|
|
|
|
if (lock->fd != INVALID_HANDLE_VALUE) {
|
|
|
|
CloseHandle(lock->fd);
|
|
|
|
lock->fd = INVALID_HANDLE_VALUE;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
typedef struct lfs_Lock {
|
|
|
|
char *ln;
|
|
|
|
} lfs_Lock;
|
|
|
|
static int lfs_lock_dir(lua_State * L)
|
|
|
|
{
|
|
|
|
lfs_Lock *lock;
|
|
|
|
size_t pathl;
|
|
|
|
char *ln;
|
|
|
|
const char *lockfile = "/lockfile.lfs";
|
|
|
|
const char *path = luaL_checklstring(L, 1, &pathl);
|
|
|
|
lock = (lfs_Lock *) lua_newuserdata(L, sizeof(lfs_Lock));
|
|
|
|
ln = (char *) malloc(pathl + strlen(lockfile) + 1);
|
|
|
|
if (!ln) {
|
|
|
|
lua_pushnil(L);
|
|
|
|
lua_pushstring(L, strerror(errno));
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
strcpy(ln, path);
|
|
|
|
strcat(ln, lockfile);
|
|
|
|
if (symlink("lock", ln) == -1) {
|
|
|
|
free(ln);
|
|
|
|
lua_pushnil(L);
|
|
|
|
lua_pushstring(L, strerror(errno));
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
lock->ln = ln;
|
|
|
|
luaL_getmetatable(L, LOCK_METATABLE);
|
|
|
|
lua_setmetatable(L, -2);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int lfs_unlock_dir(lua_State * L)
|
|
|
|
{
|
|
|
|
lfs_Lock *lock = (lfs_Lock *) luaL_checkudata(L, 1, LOCK_METATABLE);
|
|
|
|
if (lock->ln) {
|
|
|
|
unlink(lock->ln);
|
|
|
|
free(lock->ln);
|
|
|
|
lock->ln = NULL;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static int lfs_g_setmode(lua_State * L, FILE * f, int arg)
|
|
|
|
{
|
|
|
|
static const int mode[] = { _O_BINARY, _O_TEXT };
|
|
|
|
static const char *const modenames[] = { "binary", "text", NULL };
|
|
|
|
int op = luaL_checkoption(L, arg, NULL, modenames);
|
|
|
|
int res = lfs_setmode(f, mode[op]);
|
|
|
|
if (res != -1) {
|
|
|
|
int i;
|
|
|
|
lua_pushboolean(L, 1);
|
|
|
|
for (i = 0; modenames[i] != NULL; i++) {
|
|
|
|
if (mode[i] == res) {
|
|
|
|
lua_pushstring(L, modenames[i]);
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
lua_pushnil(L);
|
|
|
|
return 2;
|
|
|
|
} else {
|
|
|
|
return pusherror(L, NULL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int lfs_f_setmode(lua_State * L)
|
|
|
|
{
|
|
|
|
return lfs_g_setmode(L, check_file(L, 1, "setmode"), 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Locks a file.
|
|
|
|
** @param #1 File handle.
|
|
|
|
** @param #2 String with lock mode ('w'rite, 'r'ead).
|
|
|
|
** @param #3 Number with start position (optional).
|
|
|
|
** @param #4 Number with length (optional).
|
|
|
|
*/
|
|
|
|
static int file_lock(lua_State * L)
|
|
|
|
{
|
|
|
|
FILE *fh = check_file(L, 1, "lock");
|
|
|
|
const char *mode = luaL_checkstring(L, 2);
|
|
|
|
const long start = (long) luaL_optinteger(L, 3, 0);
|
|
|
|
long len = (long) luaL_optinteger(L, 4, 0);
|
|
|
|
if (_file_lock(L, fh, mode, start, len, "lock")) {
|
|
|
|
lua_pushboolean(L, 1);
|
|
|
|
return 1;
|
|
|
|
} else {
|
|
|
|
lua_pushnil(L);
|
|
|
|
lua_pushfstring(L, "%s", strerror(errno));
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Unlocks a file.
|
|
|
|
** @param #1 File handle.
|
|
|
|
** @param #2 Number with start position (optional).
|
|
|
|
** @param #3 Number with length (optional).
|
|
|
|
*/
|
|
|
|
static int file_unlock(lua_State * L)
|
|
|
|
{
|
|
|
|
FILE *fh = check_file(L, 1, "unlock");
|
|
|
|
const long start = (long) luaL_optinteger(L, 2, 0);
|
|
|
|
long len = (long) luaL_optinteger(L, 3, 0);
|
|
|
|
if (_file_lock(L, fh, "u", start, len, "unlock")) {
|
|
|
|
lua_pushboolean(L, 1);
|
|
|
|
return 1;
|
|
|
|
} else {
|
|
|
|
lua_pushnil(L);
|
|
|
|
lua_pushfstring(L, "%s", strerror(errno));
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Creates a link.
|
|
|
|
** @param #1 Object to link to.
|
|
|
|
** @param #2 Name of link.
|
|
|
|
** @param #3 True if link is symbolic (optional).
|
|
|
|
*/
|
|
|
|
static int make_link(lua_State * L)
|
|
|
|
{
|
|
|
|
const char *oldpath = luaL_checkstring(L, 1);
|
|
|
|
const char *newpath = luaL_checkstring(L, 2);
|
|
|
|
#ifndef _WIN32
|
|
|
|
return pushresult(L,
|
|
|
|
(lua_toboolean(L, 3) ? symlink : link) (oldpath,
|
|
|
|
newpath),
|
|
|
|
NULL);
|
|
|
|
#else
|
|
|
|
int symbolic = lua_toboolean(L, 3);
|
|
|
|
STAT_STRUCT oldpathinfo;
|
|
|
|
int is_dir = 0;
|
|
|
|
if (STAT_FUNC(oldpath, &oldpathinfo) == 0) {
|
|
|
|
is_dir = S_ISDIR(oldpathinfo.st_mode) != 0;
|
|
|
|
}
|
|
|
|
if (!symbolic && is_dir) {
|
|
|
|
lua_pushnil(L);
|
|
|
|
lua_pushstring(L,
|
|
|
|
"hard links to directories are not supported on Windows");
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
int result = symbolic ? CreateSymbolicLink(newpath, oldpath, is_dir)
|
|
|
|
: CreateHardLink(newpath, oldpath, NULL);
|
|
|
|
|
|
|
|
if (result) {
|
|
|
|
return pushresult(L, result, NULL);
|
|
|
|
} else {
|
|
|
|
lua_pushnil(L);
|
|
|
|
lua_pushstring(L, symbolic ? "make_link CreateSymbolicLink() failed"
|
|
|
|
: "make_link CreateHardLink() failed");
|
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Creates a directory.
|
|
|
|
** @param #1 Directory path.
|
|
|
|
*/
|
|
|
|
static int make_dir(lua_State * L)
|
|
|
|
{
|
|
|
|
const char *path = luaL_checkstring(L, 1);
|
|
|
|
return pushresult(L, lfs_mkdir(path), NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Removes a directory.
|
|
|
|
** @param #1 Directory path.
|
|
|
|
*/
|
|
|
|
static int remove_dir(lua_State * L)
|
|
|
|
{
|
|
|
|
const char *path = luaL_checkstring(L, 1);
|
|
|
|
return pushresult(L, rmdir(path), NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Directory iterator
|
|
|
|
*/
|
|
|
|
static int dir_iter(lua_State * L)
|
|
|
|
{
|
|
|
|
#ifdef _WIN32
|
|
|
|
struct _finddata_t c_file;
|
|
|
|
#else
|
|
|
|
struct dirent *entry;
|
|
|
|
#endif
|
|
|
|
dir_data *d = (dir_data *) luaL_checkudata(L, 1, DIR_METATABLE);
|
|
|
|
luaL_argcheck(L, d->closed == 0, 1, "closed directory");
|
|
|
|
#ifdef _WIN32
|
|
|
|
if (d->hFile == 0L) { /* first entry */
|
|
|
|
if ((d->hFile = _findfirst(d->pattern, &c_file)) == -1L) {
|
|
|
|
lua_pushnil(L);
|
|
|
|
lua_pushstring(L, strerror(errno));
|
|
|
|
d->closed = 1;
|
|
|
|
return 2;
|
|
|
|
} else {
|
|
|
|
lua_pushstring(L, c_file.name);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
} else { /* next entry */
|
|
|
|
if (_findnext(d->hFile, &c_file) == -1L) {
|
|
|
|
/* no more entries => close directory */
|
|
|
|
_findclose(d->hFile);
|
|
|
|
d->closed = 1;
|
|
|
|
return 0;
|
|
|
|
} else {
|
|
|
|
lua_pushstring(L, c_file.name);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
if ((entry = readdir(d->dir)) != NULL) {
|
|
|
|
lua_pushstring(L, entry->d_name);
|
|
|
|
return 1;
|
|
|
|
} else {
|
|
|
|
/* no more entries => close directory */
|
|
|
|
closedir(d->dir);
|
|
|
|
d->closed = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Closes directory iterators
|
|
|
|
*/
|
|
|
|
static int dir_close(lua_State * L)
|
|
|
|
{
|
|
|
|
dir_data *d = (dir_data *) lua_touserdata(L, 1);
|
|
|
|
#ifdef _WIN32
|
|
|
|
if (!d->closed && d->hFile) {
|
|
|
|
_findclose(d->hFile);
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
if (!d->closed && d->dir) {
|
|
|
|
closedir(d->dir);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
d->closed = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Factory of directory iterators
|
|
|
|
*/
|
|
|
|
static int dir_iter_factory(lua_State * L)
|
|
|
|
{
|
|
|
|
const char *path = luaL_checkstring(L, 1);
|
|
|
|
dir_data *d;
|
|
|
|
lua_pushcfunction(L, dir_iter);
|
|
|
|
d = (dir_data *) lua_newuserdata(L, sizeof(dir_data));
|
|
|
|
luaL_getmetatable(L, DIR_METATABLE);
|
|
|
|
lua_setmetatable(L, -2);
|
|
|
|
d->closed = 0;
|
|
|
|
#ifdef _WIN32
|
|
|
|
d->hFile = 0L;
|
|
|
|
if (strlen(path) > MAX_PATH - 2)
|
|
|
|
luaL_error(L, "path too long: %s", path);
|
|
|
|
else
|
|
|
|
sprintf(d->pattern, "%s/*", path);
|
|
|
|
#else
|
|
|
|
d->dir = opendir(path);
|
|
|
|
if (d->dir == NULL)
|
|
|
|
luaL_error(L, "cannot open %s: %s", path, strerror(errno));
|
|
|
|
#endif
|
|
|
|
#if LUA_VERSION_NUM >= 504
|
|
|
|
lua_pushnil(L);
|
|
|
|
lua_pushvalue(L, -2);
|
|
|
|
return 4;
|
|
|
|
#else
|
|
|
|
return 2;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Creates directory metatable.
|
|
|
|
*/
|
|
|
|
static int dir_create_meta(lua_State * L)
|
|
|
|
{
|
|
|
|
luaL_newmetatable(L, DIR_METATABLE);
|
|
|
|
|
|
|
|
/* Method table */
|
|
|
|
lua_newtable(L);
|
|
|
|
lua_pushcfunction(L, dir_iter);
|
|
|
|
lua_setfield(L, -2, "next");
|
|
|
|
lua_pushcfunction(L, dir_close);
|
|
|
|
lua_setfield(L, -2, "close");
|
|
|
|
|
|
|
|
/* Metamethods */
|
|
|
|
lua_setfield(L, -2, "__index");
|
|
|
|
lua_pushcfunction(L, dir_close);
|
|
|
|
lua_setfield(L, -2, "__gc");
|
|
|
|
|
|
|
|
#if LUA_VERSION_NUM >= 504
|
|
|
|
lua_pushcfunction(L, dir_close);
|
|
|
|
lua_setfield(L, -2, "__close");
|
|
|
|
#endif
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Creates lock metatable.
|
|
|
|
*/
|
|
|
|
static int lock_create_meta(lua_State * L)
|
|
|
|
{
|
|
|
|
luaL_newmetatable(L, LOCK_METATABLE);
|
|
|
|
|
|
|
|
/* Method table */
|
|
|
|
lua_newtable(L);
|
|
|
|
lua_pushcfunction(L, lfs_unlock_dir);
|
|
|
|
lua_setfield(L, -2, "free");
|
|
|
|
|
|
|
|
/* Metamethods */
|
|
|
|
lua_setfield(L, -2, "__index");
|
|
|
|
lua_pushcfunction(L, lfs_unlock_dir);
|
|
|
|
lua_setfield(L, -2, "__gc");
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Convert the inode protection mode to a string.
|
|
|
|
*/
|
|
|
|
#ifdef _WIN32
|
|
|
|
static const char *mode2string(unsigned short mode)
|
|
|
|
{
|
|
|
|
#else
|
|
|
|
static const char *mode2string(mode_t mode)
|
|
|
|
{
|
|
|
|
#endif
|
|
|
|
if (S_ISREG(mode))
|
|
|
|
return "file";
|
|
|
|
else if (S_ISDIR(mode))
|
|
|
|
return "directory";
|
|
|
|
else if (S_ISLNK(mode))
|
|
|
|
return "link";
|
|
|
|
else if (S_ISSOCK(mode))
|
|
|
|
return "socket";
|
|
|
|
else if (S_ISFIFO(mode))
|
|
|
|
return "named pipe";
|
|
|
|
else if (S_ISCHR(mode))
|
|
|
|
return "char device";
|
|
|
|
else if (S_ISBLK(mode))
|
|
|
|
return "block device";
|
|
|
|
else
|
|
|
|
return "other";
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Set access time and modification values for a file.
|
|
|
|
** @param #1 File path.
|
|
|
|
** @param #2 Access time in seconds, current time is used if missing.
|
|
|
|
** @param #3 Modification time in seconds, access time is used if missing.
|
|
|
|
*/
|
|
|
|
static int file_utime(lua_State * L)
|
|
|
|
{
|
|
|
|
const char *file = luaL_checkstring(L, 1);
|
|
|
|
struct utimbuf utb, *buf;
|
|
|
|
|
|
|
|
if (lua_gettop(L) == 1) /* set to current date/time */
|
|
|
|
buf = NULL;
|
|
|
|
else {
|
|
|
|
utb.actime = (time_t) luaL_optnumber(L, 2, 0);
|
|
|
|
utb.modtime = (time_t) luaL_optinteger(L, 3, utb.actime);
|
|
|
|
buf = &utb;
|
|
|
|
}
|
|
|
|
|
|
|
|
return pushresult(L, utime(file, buf), NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* inode protection mode */
|
|
|
|
static void push_st_mode(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushstring(L, mode2string(info->st_mode));
|
|
|
|
}
|
|
|
|
|
|
|
|
/* device inode resides on */
|
|
|
|
static void push_st_dev(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* inode's number */
|
|
|
|
static void push_st_ino(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_ino);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* number of hard links to the file */
|
|
|
|
static void push_st_nlink(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_nlink);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* user-id of owner */
|
|
|
|
static void push_st_uid(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_uid);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* group-id of owner */
|
|
|
|
static void push_st_gid(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_gid);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* device type, for special file inode */
|
|
|
|
static void push_st_rdev(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_rdev);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* time of last access */
|
|
|
|
static void push_st_atime(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_atime);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* time of last data modification */
|
|
|
|
static void push_st_mtime(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_mtime);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* time of last file status change */
|
|
|
|
static void push_st_ctime(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_ctime);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* file size, in bytes */
|
|
|
|
static void push_st_size(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_size);
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifndef _WIN32
|
|
|
|
/* blocks allocated for file */
|
|
|
|
static void push_st_blocks(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_blocks);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* optimal file system I/O blocksize */
|
|
|
|
static void push_st_blksize(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushinteger(L, (lua_Integer) info->st_blksize);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Convert the inode protection mode to a permission list.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifdef _WIN32
|
|
|
|
static const char *perm2string(unsigned short mode)
|
|
|
|
{
|
|
|
|
static char perms[10] = "---------";
|
|
|
|
int i;
|
|
|
|
for (i = 0; i < 9; i++)
|
|
|
|
perms[i] = '-';
|
|
|
|
if (mode & _S_IREAD) {
|
|
|
|
perms[0] = 'r';
|
|
|
|
perms[3] = 'r';
|
|
|
|
perms[6] = 'r';
|
|
|
|
}
|
|
|
|
if (mode & _S_IWRITE) {
|
|
|
|
perms[1] = 'w';
|
|
|
|
perms[4] = 'w';
|
|
|
|
perms[7] = 'w';
|
|
|
|
}
|
|
|
|
if (mode & _S_IEXEC) {
|
|
|
|
perms[2] = 'x';
|
|
|
|
perms[5] = 'x';
|
|
|
|
perms[8] = 'x';
|
|
|
|
}
|
|
|
|
return perms;
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
static const char *perm2string(mode_t mode)
|
|
|
|
{
|
|
|
|
static char perms[10] = "---------";
|
|
|
|
int i;
|
|
|
|
for (i = 0; i < 9; i++)
|
|
|
|
perms[i] = '-';
|
|
|
|
if (mode & S_IRUSR)
|
|
|
|
perms[0] = 'r';
|
|
|
|
if (mode & S_IWUSR)
|
|
|
|
perms[1] = 'w';
|
|
|
|
if (mode & S_IXUSR)
|
|
|
|
perms[2] = 'x';
|
|
|
|
if (mode & S_IRGRP)
|
|
|
|
perms[3] = 'r';
|
|
|
|
if (mode & S_IWGRP)
|
|
|
|
perms[4] = 'w';
|
|
|
|
if (mode & S_IXGRP)
|
|
|
|
perms[5] = 'x';
|
|
|
|
if (mode & S_IROTH)
|
|
|
|
perms[6] = 'r';
|
|
|
|
if (mode & S_IWOTH)
|
|
|
|
perms[7] = 'w';
|
|
|
|
if (mode & S_IXOTH)
|
|
|
|
perms[8] = 'x';
|
|
|
|
return perms;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* permssions string */
|
|
|
|
static void push_st_perm(lua_State * L, STAT_STRUCT * info)
|
|
|
|
{
|
|
|
|
lua_pushstring(L, perm2string(info->st_mode));
|
|
|
|
}
|
|
|
|
|
|
|
|
typedef void (*_push_function)(lua_State * L, STAT_STRUCT * info);
|
|
|
|
|
|
|
|
struct _stat_members {
|
|
|
|
const char *name;
|
|
|
|
_push_function push;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct _stat_members members[] = {
|
|
|
|
{ "mode", push_st_mode },
|
|
|
|
{ "dev", push_st_dev },
|
|
|
|
{ "ino", push_st_ino },
|
|
|
|
{ "nlink", push_st_nlink },
|
|
|
|
{ "uid", push_st_uid },
|
|
|
|
{ "gid", push_st_gid },
|
|
|
|
{ "rdev", push_st_rdev },
|
|
|
|
{ "access", push_st_atime },
|
|
|
|
{ "modification", push_st_mtime },
|
|
|
|
{ "change", push_st_ctime },
|
|
|
|
{ "size", push_st_size },
|
|
|
|
{ "permissions", push_st_perm },
|
|
|
|
#ifndef _WIN32
|
|
|
|
{ "blocks", push_st_blocks },
|
|
|
|
{ "blksize", push_st_blksize },
|
|
|
|
#endif
|
|
|
|
{ NULL, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Get file or symbolic link information
|
|
|
|
*/
|
|
|
|
static int _file_info_(lua_State * L,
|
|
|
|
int (*st)(const char *, STAT_STRUCT *))
|
|
|
|
{
|
|
|
|
STAT_STRUCT info;
|
|
|
|
const char *file = luaL_checkstring(L, 1);
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (st(file, &info)) {
|
|
|
|
lua_pushnil(L);
|
|
|
|
lua_pushfstring(L, "cannot obtain information from file '%s': %s",
|
|
|
|
file, strerror(errno));
|
|
|
|
lua_pushinteger(L, errno);
|
|
|
|
return 3;
|
|
|
|
}
|
|
|
|
if (lua_isstring(L, 2)) {
|
|
|
|
const char *member = lua_tostring(L, 2);
|
|
|
|
for (i = 0; members[i].name; i++) {
|
|
|
|
if (strcmp(members[i].name, member) == 0) {
|
|
|
|
/* push member value and return */
|
|
|
|
members[i].push(L, &info);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* member not found */
|
|
|
|
return luaL_error(L, "invalid attribute name '%s'", member);
|
|
|
|
}
|
|
|
|
/* creates a table if none is given, removes extra arguments */
|
|
|
|
lua_settop(L, 2);
|
|
|
|
if (!lua_istable(L, 2)) {
|
|
|
|
lua_newtable(L);
|
|
|
|
}
|
|
|
|
/* stores all members in table on top of the stack */
|
|
|
|
for (i = 0; members[i].name; i++) {
|
|
|
|
lua_pushstring(L, members[i].name);
|
|
|
|
members[i].push(L, &info);
|
|
|
|
lua_rawset(L, -3);
|
|
|
|
}
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Get file information using stat.
|
|
|
|
*/
|
|
|
|
static int file_info(lua_State * L)
|
|
|
|
{
|
|
|
|
return _file_info_(L, STAT_FUNC);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Push the symlink target to the top of the stack.
|
|
|
|
** Assumes the file name is at position 1 of the stack.
|
|
|
|
** Returns 1 if successful (with the target on top of the stack),
|
|
|
|
** 0 on failure (with stack unchanged, and errno set).
|
|
|
|
*/
|
|
|
|
static int push_link_target(lua_State * L)
|
|
|
|
{
|
|
|
|
const char *file = luaL_checkstring(L, 1);
|
|
|
|
#ifdef _WIN32
|
|
|
|
HANDLE h = CreateFile(file, GENERIC_READ,
|
|
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
|
|
|
|
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
|
|
|
|
if (h == INVALID_HANDLE_VALUE) {
|
|
|
|
return lfs_win32_pusherror(L);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
char *target = NULL;
|
|
|
|
int tsize, size = 256; /* size = initial buffer capacity */
|
|
|
|
int ok = 0;
|
|
|
|
while (!ok) {
|
|
|
|
char *target2 = realloc(target, size);
|
|
|
|
if (!target2) { /* failed to allocate */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
target = target2;
|
|
|
|
#ifdef _WIN32
|
|
|
|
tsize = GetFinalPathNameByHandle(h, target, size, FILE_NAME_OPENED);
|
|
|
|
#else
|
|
|
|
tsize = readlink(file, target, size);
|
|
|
|
#endif
|
|
|
|
if (tsize < 0) { /* a readlink() error occurred */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (tsize < size) {
|
|
|
|
#ifdef _WIN32
|
|
|
|
if (tsize > 4 && strncmp(target, "\\\\?\\", 4) == 0) {
|
|
|
|
memmove_s(target, tsize - 3, target + 4, tsize - 3);
|
|
|
|
tsize -= 4;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
ok = 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
/* possibly truncated readlink() result, double size and retry */
|
|
|
|
size *= 2;
|
|
|
|
}
|
|
|
|
if (ok) {
|
|
|
|
target[tsize] = '\0';
|
|
|
|
lua_pushlstring(L, target, tsize);
|
|
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
|
|
CloseHandle(h);
|
|
|
|
#endif
|
|
|
|
free(target);
|
|
|
|
return ok;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Get symbolic link information using lstat.
|
|
|
|
*/
|
|
|
|
static int link_info(lua_State * L)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
if (lua_isstring(L, 2) && (strcmp(lua_tostring(L, 2), "target") == 0)) {
|
|
|
|
int ok = push_link_target(L);
|
|
|
|
return ok ? 1 : pusherror(L, "could not obtain link target");
|
|
|
|
}
|
|
|
|
ret = _file_info_(L, LSTAT_FUNC);
|
|
|
|
if (ret == 1 && lua_type(L, -1) == LUA_TTABLE) {
|
|
|
|
int ok = push_link_target(L);
|
|
|
|
if (ok) {
|
|
|
|
lua_setfield(L, -2, "target");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
** Assumes the table is on top of the stack.
|
|
|
|
*/
|
|
|
|
static void set_info(lua_State * L)
|
|
|
|
{
|
|
|
|
lua_pushliteral(L, "Copyright (C) 2003-2017 Kepler Project");
|
|
|
|
lua_setfield(L, -2, "_COPYRIGHT");
|
|
|
|
lua_pushliteral(L,
|
|
|
|
"LuaFileSystem is a Lua library developed to complement "
|
|
|
|
"the set of functions related to file systems offered by "
|
|
|
|
"the standard Lua distribution");
|
|
|
|
lua_setfield(L, -2, "_DESCRIPTION");
|
|
|
|
lua_pushliteral(L, "LuaFileSystem " LFS_VERSION);
|
|
|
|
lua_setfield(L, -2, "_VERSION");
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static const struct luaL_Reg fslib[] = {
|
|
|
|
{ "attributes", file_info },
|
2022-02-20 12:57:01 +00:00
|
|
|
/* no 'chdir' without sandboxing it */
|
|
|
|
/* no 'currentdir' without sandboxing it */
|
2022-01-29 20:11:21 +00:00
|
|
|
{ "dir", dir_iter_factory },
|
|
|
|
{ "link", make_link },
|
|
|
|
{ "lock", file_lock },
|
|
|
|
{ "mkdir", make_dir },
|
|
|
|
{ "rmdir", remove_dir },
|
|
|
|
{ "symlinkattributes", link_info },
|
|
|
|
{ "setmode", lfs_f_setmode },
|
|
|
|
{ "touch", file_utime },
|
|
|
|
{ "unlock", file_unlock },
|
|
|
|
{ "lock_dir", lfs_lock_dir },
|
|
|
|
{ NULL, NULL },
|
|
|
|
};
|
|
|
|
|
|
|
|
LFS_EXPORT int luaopen_lfs(lua_State * L)
|
|
|
|
{
|
|
|
|
dir_create_meta(L);
|
|
|
|
lock_create_meta(L);
|
|
|
|
new_lib(L, fslib);
|
|
|
|
lua_pushvalue(L, -1);
|
|
|
|
lua_setglobal(L, LFS_LIBNAME);
|
|
|
|
set_info(L);
|
|
|
|
return 1;
|
|
|
|
}
|