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nodemcu-firmware/app/modules/file.c

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// Module for interfacing with file system
#include "module.h"
#include "lauxlib.h"
#include "lmem.h"
#include "platform.h"
#include "c_types.h"
#include "vfs.h"
#include "c_string.h"
#include <alloca.h>
#define FILE_READ_CHUNK 1024
// use this time/date in absence of a timestamp
#define FILE_TIMEDEF_YEAR 1970
#define FILE_TIMEDEF_MON 01
#define FILE_TIMEDEF_DAY 01
#define FILE_TIMEDEF_HOUR 00
#define FILE_TIMEDEF_MIN 00
#define FILE_TIMEDEF_SEC 00
static int file_fd = 0;
static int file_fd_ref = LUA_NOREF;
static int rtc_cb_ref = LUA_NOREF;
typedef struct _file_fd_ud {
int fd;
} file_fd_ud;
static void table2tm( lua_State *L, vfs_time *tm )
{
int idx = lua_gettop( L );
// extract items from table
lua_getfield( L, idx, "year" );
lua_getfield( L, idx, "mon" );
lua_getfield( L, idx, "day" );
lua_getfield( L, idx, "hour" );
lua_getfield( L, idx, "min" );
lua_getfield( L, idx, "sec" );
tm->year = luaL_optint( L, ++idx, FILE_TIMEDEF_YEAR );
tm->mon = luaL_optint( L, ++idx, FILE_TIMEDEF_MON );
tm->day = luaL_optint( L, ++idx, FILE_TIMEDEF_DAY );
tm->hour = luaL_optint( L, ++idx, FILE_TIMEDEF_HOUR );
tm->min = luaL_optint( L, ++idx, FILE_TIMEDEF_MIN );
tm->sec = luaL_optint( L, ++idx, FILE_TIMEDEF_SEC );
// remove items from stack
lua_pop( L, 6 );
}
static sint32_t file_rtc_cb( vfs_time *tm )
{
sint32_t res = VFS_RES_ERR;
if (rtc_cb_ref != LUA_NOREF) {
lua_State *L = lua_getstate();
lua_rawgeti( L, LUA_REGISTRYINDEX, rtc_cb_ref );
lua_call( L, 0, 1 );
if (lua_type( L, lua_gettop( L ) ) == LUA_TTABLE) {
table2tm( L, tm );
res = VFS_RES_OK;
}
// pop item returned by callback
lua_pop( L, 1 );
}
return res;
}
// Lua: on()
static int file_on(lua_State *L)
{
enum events{
ON_RTC = 0
};
const char *const eventnames[] = {"rtc", NULL};
int event = luaL_checkoption(L, 1, "rtc", eventnames);
switch (event) {
case ON_RTC:
luaL_unref(L, LUA_REGISTRYINDEX, rtc_cb_ref);
if ((lua_type(L, 2) == LUA_TFUNCTION) ||
(lua_type(L, 2) == LUA_TLIGHTFUNCTION)) {
lua_pushvalue(L, 2); // copy argument (func) to the top of stack
rtc_cb_ref = luaL_ref(L, LUA_REGISTRYINDEX);
vfs_register_rtc_cb(file_rtc_cb);
} else {
rtc_cb_ref = LUA_NOREF;
vfs_register_rtc_cb(NULL);
}
break;
default:
break;
}
return 0;
}
// Lua: close()
static int file_close( lua_State* L )
{
int need_pop = FALSE;
file_fd_ud *ud;
if (lua_type( L, 1 ) != LUA_TUSERDATA) {
// fall back to last opened file
if (file_fd_ref != LUA_NOREF) {
lua_rawgeti( L, LUA_REGISTRYINDEX, file_fd_ref );
// top of stack is now default file descriptor
ud = (file_fd_ud *)luaL_checkudata(L, -1, "file.obj");
lua_pop( L, 1 );
} else {
// no default file currently opened
return 0;
}
} else {
ud = (file_fd_ud *)luaL_checkudata(L, 1, "file.obj");
}
// unref default file descriptor
luaL_unref( L, LUA_REGISTRYINDEX, file_fd_ref );
file_fd_ref = LUA_NOREF;
if(ud->fd){
vfs_close(ud->fd);
// mark as closed
ud->fd = 0;
}
return 0;
}
static int file_obj_free( lua_State *L )
{
file_fd_ud *ud = (file_fd_ud *)luaL_checkudata(L, 1, "file.obj");
if (ud->fd) {
// close file if it's still open
vfs_close(ud->fd);
ud->fd = 0;
}
return 0;
}
// Lua: format()
static int file_format( lua_State* L )
{
size_t len;
file_close(L);
if( !vfs_format() )
{
NODE_ERR( "\n*** ERROR ***: unable to format. FS might be compromised.\n" );
NODE_ERR( "It is advised to re-flash the NodeMCU image.\n" );
luaL_error(L, "Failed to format file system");
}
else{
NODE_ERR( "format done.\n" );
}
return 0;
}
static int file_fscfg (lua_State *L)
{
uint32_t phys_addr, phys_size;
vfs_fscfg("/FLASH", &phys_addr, &phys_size);
lua_pushinteger (L, phys_addr);
lua_pushinteger (L, phys_size);
return 2;
}
// Lua: open(filename, mode)
static int file_open( lua_State* L )
{
size_t len;
// unref last file descriptor to allow gc'ing if not kept by user script
luaL_unref( L, LUA_REGISTRYINDEX, file_fd_ref );
file_fd_ref = LUA_NOREF;
const char *fname = luaL_checklstring( L, 1, &len );
const char *basename = vfs_basename( fname );
luaL_argcheck(L, c_strlen(basename) <= FS_OBJ_NAME_LEN && c_strlen(fname) == len, 1, "filename invalid");
const char *mode = luaL_optstring(L, 2, "r");
file_fd = vfs_open(fname, mode);
if(!file_fd){
lua_pushnil(L);
} else {
file_fd_ud *ud = (file_fd_ud *) lua_newuserdata( L, sizeof( file_fd_ud ) );
ud->fd = file_fd;
luaL_getmetatable( L, "file.obj" );
lua_setmetatable( L, -2 );
// store reference to opened file
lua_pushvalue( L, -1 );
file_fd_ref = luaL_ref( L, LUA_REGISTRYINDEX );
}
return 1;
}
// Lua: list()
static int file_list( lua_State* L )
{
vfs_dir *dir;
const char *pattern;
struct vfs_stat stat;
int pcres;
lua_settop(L, 1);
pattern = luaL_optstring(L, 1, NULL); /* Pattern (arg) or nil (not) at 1 */
dir = vfs_opendir("");
if (dir == NULL) {
return 0;
}
lua_newtable( L ); /* Table at 2 */
if (pattern) {
/*
* We know that pattern is a string, and so the "match" method will always
* exist. No need to check return value here
*/
luaL_getmetafield( L, 1, "match" ); /* Function at 3 */
}
while (vfs_readdir(dir, &stat) == VFS_RES_OK) {
if (pattern) {
lua_settop( L, 3 ); /* Ensure nothing else on stack */
/* Construct and pcall(string.match,name,pattern) */
lua_pushvalue( L, 3 );
lua_pushstring( L, stat.name );
lua_pushvalue( L, 1 );
pcres = lua_pcall( L, 2, 1, 0 );
if (pcres != 0) {
vfs_closedir(dir);
lua_error( L );
}
if (lua_isnil( L, -1 )) {
continue;
}
}
lua_pushinteger( L, stat.size );
lua_setfield( L, 2, stat.name );
}
/* Shed everything back to Table */
lua_settop( L, 2 );
vfs_closedir(dir);
return 1;
}
static int get_file_obj( lua_State *L, int *argpos )
{
if (lua_type( L, 1 ) == LUA_TUSERDATA) {
file_fd_ud *ud = (file_fd_ud *)luaL_checkudata(L, 1, "file.obj");
*argpos = 2;
return ud->fd;
} else {
*argpos = 1;
return file_fd;
}
}
#define GET_FILE_OBJ int argpos; \
int fd = get_file_obj( L, &argpos );
static int file_seek (lua_State *L)
{
GET_FILE_OBJ;
static const int mode[] = {VFS_SEEK_SET, VFS_SEEK_CUR, VFS_SEEK_END};
static const char *const modenames[] = {"set", "cur", "end", NULL};
if(!fd)
return luaL_error(L, "open a file first");
int op = luaL_checkoption(L, argpos, "cur", modenames);
long offset = luaL_optlong(L, ++argpos, 0);
op = vfs_lseek(fd, offset, mode[op]);
if (op < 0)
lua_pushnil(L); /* error */
else
lua_pushinteger(L, vfs_tell(fd));
return 1;
}
// Lua: exists(filename)
static int file_exists( lua_State* L )
{
size_t len;
const char *fname = luaL_checklstring( L, 1, &len );
const char *basename = vfs_basename( fname );
luaL_argcheck(L, c_strlen(basename) <= FS_OBJ_NAME_LEN && c_strlen(fname) == len, 1, "filename invalid");
struct vfs_stat stat;
lua_pushboolean(L, vfs_stat((char *)fname, &stat) == VFS_RES_OK ? 1 : 0);
return 1;
}
// Lua: remove(filename)
static int file_remove( lua_State* L )
{
size_t len;
const char *fname = luaL_checklstring( L, 1, &len );
const char *basename = vfs_basename( fname );
luaL_argcheck(L, c_strlen(basename) <= FS_OBJ_NAME_LEN && c_strlen(fname) == len, 1, "filename invalid");
vfs_remove((char *)fname);
return 0;
}
// Lua: flush()
static int file_flush( lua_State* L )
{
GET_FILE_OBJ;
if(!fd)
return luaL_error(L, "open a file first");
if(vfs_flush(fd) == 0)
lua_pushboolean(L, 1);
else
lua_pushnil(L);
return 1;
}
// Lua: rename("oldname", "newname")
static int file_rename( lua_State* L )
{
size_t len;
const char *oldname = luaL_checklstring( L, 1, &len );
const char *basename = vfs_basename( oldname );
luaL_argcheck(L, c_strlen(basename) <= FS_OBJ_NAME_LEN && c_strlen(oldname) == len, 1, "filename invalid");
const char *newname = luaL_checklstring( L, 2, &len );
basename = vfs_basename( newname );
luaL_argcheck(L, c_strlen(basename) <= FS_OBJ_NAME_LEN && c_strlen(newname) == len, 2, "filename invalid");
if(0 <= vfs_rename( oldname, newname )){
lua_pushboolean(L, 1);
} else {
lua_pushboolean(L, 0);
}
return 1;
}
// Lua: stat(filename)
static int file_stat( lua_State* L )
{
size_t len;
const char *fname = luaL_checklstring( L, 1, &len );
luaL_argcheck( L, c_strlen(fname) <= FS_OBJ_NAME_LEN && c_strlen(fname) == len, 1, "filename invalid" );
struct vfs_stat stat;
if (vfs_stat( (char *)fname, &stat ) != VFS_RES_OK) {
lua_pushnil( L );
return 1;
}
lua_createtable( L, 0, 7 );
lua_pushinteger( L, stat.size );
lua_setfield( L, -2, "size" );
lua_pushstring( L, stat.name );
lua_setfield( L, -2, "name" );
lua_pushboolean( L, stat.is_dir );
lua_setfield( L, -2, "is_dir" );
lua_pushboolean( L, stat.is_rdonly );
lua_setfield( L, -2, "is_rdonly" );
lua_pushboolean( L, stat.is_hidden );
lua_setfield( L, -2, "is_hidden" );
lua_pushboolean( L, stat.is_sys );
lua_setfield( L, -2, "is_sys" );
lua_pushboolean( L, stat.is_arch );
lua_setfield( L, -2, "is_arch" );
// time stamp as sub-table
lua_createtable( L, 0, 6 );
lua_pushinteger( L, stat.tm_valid ? stat.tm.year : FILE_TIMEDEF_YEAR );
lua_setfield( L, -2, "year" );
lua_pushinteger( L, stat.tm_valid ? stat.tm.mon : FILE_TIMEDEF_MON );
lua_setfield( L, -2, "mon" );
lua_pushinteger( L, stat.tm_valid ? stat.tm.day : FILE_TIMEDEF_DAY );
lua_setfield( L, -2, "day" );
lua_pushinteger( L, stat.tm_valid ? stat.tm.hour : FILE_TIMEDEF_HOUR );
lua_setfield( L, -2, "hour" );
lua_pushinteger( L, stat.tm_valid ? stat.tm.min : FILE_TIMEDEF_MIN );
lua_setfield( L, -2, "min" );
lua_pushinteger( L, stat.tm_valid ? stat.tm.sec : FILE_TIMEDEF_SEC );
lua_setfield( L, -2, "sec" );
lua_setfield( L, -2, "time" );
return 1;
}
// g_read()
static int file_g_read( lua_State* L, int n, int16_t end_char, int fd )
{
int i, j;
luaL_Buffer b;
char p[LUAL_BUFFERSIZE/2];
if(!fd)
return luaL_error(L, "open a file first");
luaL_buffinit(L, &b);
for (j = 0; j < n; j += sizeof(p)) {
int nwanted = (n - j >= sizeof(p)) ? sizeof(p) : n - j;
int nread = vfs_read(fd, p, nwanted);
if (nread == VFS_RES_ERR || nread == 0) {
lua_pushnil(L);
return 1;
}
for (i = 0; i < nread; ++i) {
luaL_addchar(&b, p[i]);
if (p[i] == end_char) {
vfs_lseek(fd, -nread + j + i + 1, VFS_SEEK_CUR); //reposition after end char found
nread = 0; // force break on outer loop
break;
}
}
if (nread < nwanted)
break;
}
luaL_pushresult(&b);
return 1;
}
// Lua: read()
// file.read() will read FILE _CHUNK bytes, or EOF is reached.
// file.read(10) will read 10 byte from file, or EOF is reached.
// file.read('q') will read until 'q' or EOF is reached.
static int file_read( lua_State* L )
{
unsigned need_len = FILE_READ_CHUNK;
int16_t end_char = EOF;
size_t el;
GET_FILE_OBJ;
if( lua_type( L, argpos ) == LUA_TNUMBER )
{
need_len = ( unsigned )luaL_checkinteger( L, argpos );
}
else if(lua_isstring(L, argpos))
{
const char *end = luaL_checklstring( L, argpos, &el );
if(el!=1){
return luaL_error( L, "wrong arg range" );
}
end_char = (int16_t)end[0];
}
return file_g_read(L, need_len, end_char, fd);
}
// Lua: readline()
static int file_readline( lua_State* L )
{
GET_FILE_OBJ;
return file_g_read(L, FILE_READ_CHUNK, '\n', fd);
}
// Lua: getfile(filename)
static int file_getfile( lua_State* L )
{
// Warning this code C calls other file_* routines to avoid duplication code. These
// use Lua stack addressing of arguments, so this does Lua stack maniplation to
// align these
int ret_cnt = 0;
lua_settop(L ,1);
// Stack [1] = FD
file_open(L);
// Stack [1] = filename; [2] = FD or nil
if (!lua_isnil(L, -1)) {
lua_remove(L, 1); // dump filename, so [1] = FD
file_fd_ud *ud = (file_fd_ud *)luaL_checkudata(L, 1, "file.obj");
ret_cnt = file_g_read(L, LUAI_MAXINT32, EOF, ud->fd);
// Stack [1] = FD; [2] = contents if ret_cnt = 1;
file_close(L); // leaves Stack unchanged if [1] = FD
lua_remove(L, 1); // Dump FD leaving contents as [1] / ToS
}
return ret_cnt;
}
// Lua: write("string")
static int file_write( lua_State* L )
{
GET_FILE_OBJ;
if(!fd)
return luaL_error(L, "open a file first");
size_t l, rl;
const char *s = luaL_checklstring(L, argpos, &l);
rl = vfs_write(fd, s, l);
if(rl==l)
lua_pushboolean(L, 1);
else
lua_pushnil(L);
return 1;
}
// Lua: writeline("string")
static int file_writeline( lua_State* L )
{
GET_FILE_OBJ;
if(!fd)
return luaL_error(L, "open a file first");
size_t l, rl;
const char *s = luaL_checklstring(L, argpos, &l);
rl = vfs_write(fd, s, l);
if(rl==l){
rl = vfs_write(fd, "\n", 1);
if(rl==1)
lua_pushboolean(L, 1);
else
lua_pushnil(L);
}
else{
lua_pushnil(L);
}
return 1;
}
// Lua: getfile(filename)
static int file_putfile( lua_State* L )
{
// Warning this code C calls other file_* routines to avoid duplication code. These
// use Lua stack addressing of arguments, so this does Lua stack maniplation to
// align these
int ret_cnt = 0;
lua_settop(L, 2);
lua_pushvalue(L, 2); //dup contents onto the ToS [3]
lua_pushliteral(L, "w+");
lua_replace(L, 2);
// Stack [1] = filename; [2] "w+" [3] contents;
file_open(L);
// Stack [1] = filename; [2] "w+" [3] contents; [4] FD or nil
if (!lua_isnil(L, -1)) {
lua_remove(L, 2); //dump "w+" attribute literal
lua_replace(L, 1);
// Stack [1] = FD; [2] contents
file_write(L);
// Stack [1] = FD; [2] contents; [3] result status
lua_remove(L, 2); //dump contents
file_close(L);
lua_remove(L, 1); // Dump FD leaving status as ToS
}
return 1;
}
// Lua: fsinfo()
static int file_fsinfo( lua_State* L )
{
u32_t total, used;
if (vfs_fsinfo("", &total, &used)) {
return luaL_error(L, "file system failed");
}
NODE_DBG("total: %d, used:%d\n", total, used);
if(total>0x7FFFFFFF || used>0x7FFFFFFF || used > total)
{
return luaL_error(L, "file system error");
}
lua_pushinteger(L, total-used);
lua_pushinteger(L, used);
lua_pushinteger(L, total);
return 3;
}
typedef struct {
vfs_vol *vol;
} volume_type;
// Lua: vol = file.mount("/SD0")
static int file_mount( lua_State *L )
{
const char *ldrv = luaL_checkstring( L, 1 );
int num = luaL_optint( L, 2, -1 );
volume_type *vol = (volume_type *)lua_newuserdata( L, sizeof( volume_type ) );
if (vol->vol = vfs_mount( ldrv, num )) {
/* set its metatable */
luaL_getmetatable(L, "file.vol");
lua_setmetatable(L, -2);
return 1;
} else {
// remove created userdata
lua_pop( L, 1 );
return 0;
}
}
// Lua: success = file.chdir("/SD0/")
static int file_chdir( lua_State *L )
{
const char *path = luaL_checkstring( L, 1 );
lua_pushboolean( L, 0 <= vfs_chdir( path ) );
return 1;
}
static int file_vol_umount( lua_State *L )
{
volume_type *vol = luaL_checkudata( L, 1, "file.vol" );
luaL_argcheck( L, vol, 1, "volume expected" );
lua_pushboolean( L, 0 <= vfs_umount( vol->vol ) );
// invalidate vfs descriptor, it has been free'd anyway
vol->vol = NULL;
return 1;
}
LROT_BEGIN(file_obj)
LROT_FUNCENTRY( close, file_close )
LROT_FUNCENTRY( read, file_read )
LROT_FUNCENTRY( readline, file_readline )
LROT_FUNCENTRY( write, file_write )
LROT_FUNCENTRY( writeline, file_writeline )
LROT_FUNCENTRY( seek, file_seek )
LROT_FUNCENTRY( flush, file_flush )
LROT_FUNCENTRY( __gc, file_obj_free )
LROT_TABENTRY( __index, file_obj )
LROT_END( file_obj, file_obj, LROT_MASK_GC_INDEX )
LROT_BEGIN(file_vol)
LROT_FUNCENTRY( umount, file_vol_umount )
// LROT_FUNCENTRY( getfree, file_vol_getfree )
// LROT_FUNCENTRY( getlabel, file_vol_getlabel )
// LROT_FUNCENTRY( __gc, file_vol_free )
LROT_TABENTRY( __index, file_vol )
LROT_END( file_vol, file_vol, LROT_MASK_GC_INDEX )
#ifdef BUILD_SPIFFS
#define LROT_FUNCENTRY_S(n,f) LROT_FUNCENTRY(n,f)
#else
#define LROT_FUNCENTRY_S(n,f)
#endif
#ifdef BUILD_FATFS
#define LROT_FUNCENTRY_F(n,f) LROT_FUNCENTRY(n,f)
#else
#define LROT_FUNCENTRY_F(n,f)
#endif
// Module function map
LROT_BEGIN(file)
LROT_FUNCENTRY( list, file_list )
LROT_FUNCENTRY( open, file_open )
LROT_FUNCENTRY( close, file_close )
LROT_FUNCENTRY( write, file_write )
LROT_FUNCENTRY( writeline, file_writeline )
LROT_FUNCENTRY( read, file_read )
LROT_FUNCENTRY( readline, file_readline )
LROT_FUNCENTRY_S( format, file_format )
LROT_FUNCENTRY_S( fscfg, file_fscfg )
LROT_FUNCENTRY( remove, file_remove )
LROT_FUNCENTRY( seek, file_seek )
LROT_FUNCENTRY( flush, file_flush )
LROT_FUNCENTRY( rename, file_rename )
LROT_FUNCENTRY( exists, file_exists )
LROT_FUNCENTRY( getcontents, file_getfile )
LROT_FUNCENTRY( putcontents, file_putfile )
LROT_FUNCENTRY( fsinfo, file_fsinfo )
LROT_FUNCENTRY( on, file_on )
LROT_FUNCENTRY( stat, file_stat )
LROT_FUNCENTRY_F( mount, file_mount )
LROT_FUNCENTRY_F( chdir, file_chdir )
LROT_END( file, NULL, 0 )
int luaopen_file( lua_State *L ) {
luaL_rometatable( L, "file.vol", LROT_TABLEREF(file_vol));
luaL_rometatable( L, "file.obj", LROT_TABLEREF(file_obj));
return 0;
}
NODEMCU_MODULE(FILE, "file", file, luaopen_file);
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