LuPPC/src/c/lnative.c

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#define _XOPEN_SOURCE 500
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#include "lupi.h"
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
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#include <sys/types.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
#include <dirent.h>
#include <ftw.h>
#include <limits.h>
#include <linux/kd.h>
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static int l_sleep (lua_State *L) {
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unsigned int t = lua_tonumber(L, 1);
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usleep(t);
return 0;
}
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// Filesystem methods
static int l_fs_exists (lua_State *L) {
const char* fname = lua_tostring(L, 1);
if( access( fname, F_OK ) != -1 ) {
lua_pushboolean(L, 1);
} else {
lua_pushboolean(L, 0);
}
return 1;
}
static int l_fs_mkdir (lua_State *L) {
const char* fname = lua_tostring(L, 1);
if( mkdir( fname, 0755 ) != -1 ) {
lua_pushboolean(L, 1);
} else {
lua_pushboolean(L, 0);
}
return 1;
}
static int l_fs_isdir (lua_State *L) {
const char* fname = lua_tostring(L, 1);
struct stat s;
int err = stat(fname, &s);
if(-1 == err) {
lua_pushboolean(L, 0);
} else {
if(S_ISDIR(s.st_mode)) {
lua_pushboolean(L, 1);
} else {
lua_pushboolean(L, 0);
}
}
return 1;
}
static int l_fs_spaceUsed (lua_State *L) {
const char* fname = lua_tostring(L, 1);
struct statvfs s;
if( statvfs(fname, &s) != -1 ) {
lua_pushnumber(L, s.f_bsize * s.f_bfree);
} else {
lua_pushnumber(L, -1);
}
return 1;
}
static int l_fs_open (lua_State *L) {
const char* fname = lua_tostring(L, 1);
const char* mode = lua_tostring(L, 2);
int m = 0;
if(mode[0] == 'r') m = O_RDONLY;
else if(mode[0] == 'w') m = O_WRONLY | O_CREAT /*| O_DIRECT*/;
else if(mode[0] == 'a') m = O_WRONLY | O_APPEND | O_CREAT /*| O_DIRECT*/;
else return 0;
int fd = open(fname, m, 644);
if(fd == -1) return 0;
lua_pushnumber(L, fd);
return 1;
}
static int l_fs_seek (lua_State *L) {
int fd = lua_tonumber(L, 1);
int whence = lua_tonumber(L, 2);
long offset = lua_tonumber(L, 3);
int w = 0;
if(whence == 0) w = SEEK_CUR;
else if(whence == 1) w = SEEK_SET;
else if(whence == 2) w = SEEK_END;
else return 0;
int res = lseek(fd, w, offset);
lua_pushnumber(L, res);
return 1;
}
static int l_fs_write (lua_State *L) {
int fd = lua_tonumber(L, 1);
size_t len = 0;
const char* data = lua_tolstring(L, 2, &len);
//TODO: May not all data be written?
if(write(fd, data, len) == -1) {
lua_pushboolean(L, 0);
} else {
lua_pushboolean(L, 1);
}
return 1;
}
static int l_fs_spaceTotal (lua_State *L) {
const char* fname = lua_tostring(L, 1);
struct statvfs s;
if( statvfs(fname, &s) != -1 ) {
lua_pushnumber(L, s.f_frsize * s.f_blocks);
} else {
lua_pushnumber(L, -1);
}
return 1;
}
static int l_fs_rename (lua_State *L) {
const char* from = lua_tostring(L, 1);
const char* to = lua_tostring(L, 1);
if( rename( from, to ) != -1 ) {
lua_pushboolean(L, 1);
} else {
lua_pushboolean(L, 0);
}
return 1;
}
static int l_fs_list (lua_State *L) {
const char* path = lua_tostring(L, 1);
DIR *dir;
struct dirent *ent;
if ((dir = opendir(path)) != NULL) {
lua_newtable(L);
int n = 1;
while ((ent = readdir(dir)) != NULL) { //TODO: Check if it should be freed
lua_pushstring(L, ent->d_name);
lua_rawseti(L, -2, n++);
}
closedir(dir);
} else {
return 0;
}
return 1;
}
static int l_fs_lastModified (lua_State *L) {
const char* path = lua_tostring(L, 1);
struct stat s;
if( stat(path, &s) != -1 ) {
lua_pushnumber(L, s.st_mtime);
} else {
return 0; //TODO: No error?
}
return 1;
}
static int rm(const char *path, const struct stat *s, int flag, struct FTW *f) {
int status;
int (*rm_func)(const char *);
switch(flag) {
default: rm_func = unlink; break;
case FTW_DP: rm_func = rmdir;
}
if(status = rm_func(path), status != 0)
perror(path);
return status;
}
static int l_fs_remove (lua_State *L) {
const char* path = lua_tostring(L, 1);
if( nftw( path, rm, FOPEN_MAX, FTW_DEPTH )) {
lua_pushboolean(L, 0);
} else {
lua_pushboolean(L, 1);
}
return 1;
}
static int l_fs_close (lua_State *L) {
int fd = lua_tonumber(L, 1);
if(close(fd) == -1) {
lua_pushboolean(L, 0);
} else {
lua_pushboolean(L, 1);
}
return 1;
}
static int l_fs_size (lua_State *L) {
const char* path = lua_tostring(L, 1);
struct stat s;
if( stat(path, &s) != -1 ) {
lua_pushnumber(L, s.st_size);
} else {
return 0; //TODO: No error?
}
return 1;
}
static int l_fs_read (lua_State *L) {
int fd = lua_tonumber(L, 1);
int count = lua_tonumber(L, 2);
void* buf = malloc(count);
size_t res = read(fd, buf, count);
if(res != -1) {
lua_pushlstring(L, buf, res);
free(buf);
return 1;
}
free(buf);
return 0;
}
#ifndef CLOCK_TICK_RATE
#define CLOCK_TICK_RATE 1193180
#endif
//Filesystem end
static int l_beep (lua_State *L) {
int freq = lua_tonumber(L, 1);
int btime = lua_tonumber(L, 2);
int console_fd = -1;
if((console_fd = open("/dev/console", O_WRONLY)) == -1) {
//fprintf(stderr, "Could not open /dev/console for writing.\n");
printf("\a");
return 0;
}
if(ioctl(console_fd, KIOCSOUND, (int)(CLOCK_TICK_RATE/freq)) < 0) {
printf("\a");
return 0;
}
usleep(1000 * btime);
ioctl(console_fd, KIOCSOUND, 0);
close(console_fd);
return 0;
}
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void luanative_start(lua_State *L) {
lua_createtable (L, 0, 1);
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pushctuple(L, "sleep", l_sleep);
pushctuple(L, "fs_exists", l_fs_exists);
pushctuple(L, "fs_mkdir", l_fs_mkdir);
pushctuple(L, "fs_isdir", l_fs_isdir);
pushctuple(L, "fs_spaceUsed", l_fs_spaceUsed);
pushctuple(L, "fs_open", l_fs_open);
pushctuple(L, "fs_seek", l_fs_seek);
pushctuple(L, "fs_write", l_fs_write);
pushctuple(L, "fs_spaceTotal", l_fs_spaceTotal);
pushctuple(L, "fs_rename", l_fs_rename);
pushctuple(L, "fs_lastModified", l_fs_lastModified);
pushctuple(L, "fs_remove", l_fs_remove);
pushctuple(L, "fs_close", l_fs_close);
pushctuple(L, "fs_size", l_fs_size);
pushctuple(L, "fs_read", l_fs_read);
pushctuple(L, "beep", l_beep);
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lua_setglobal(L, "native");
}