luaL_loadstring complains on syntax, while lua executes script problemless
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- Subject: luaL_loadstring complains on syntax, while lua executes script problemless
- From: "basiliscos@..." <basiliscos@...>
- Date: 2015年4月22日 22:23:19 +0300
Hello dear lua community,
I'm experimenting with baby C-server with lua scripting on it. I have
met the following issue: if I load the sample script from my server
luaL_loadstring tells about syntax error; meanwhile when I run
my script in console it compiles (and runs) without any problems.
$ lua ./script.lua && echo "OK"
ls -lah / function: 0x7e2c00
OK
$ cat script.lua
local my_callback = function(exit_code, stdout, stderr)
print 'Hello from callback';
end
my_fun = print;
--print 'Hello from lua';
my_fun(
'ls',
'-lah',
'/',
my_callback);
--print 'Goodbye from lua';
$ cat my.c
#include <fcntl.h>
#include <pthread.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
int lua_my_fun(lua_State *L) {
return 0;
}
static char* script;
static int load_script(char* script_path) {
struct stat script_stat;
int result;
FILE *script_file;
size_t records_read;
result = stat(script_path, &script_stat);
if (result) {
perror("error get script stats");
return -1;
}
script = malloc(script_stat.st_size);
if (!script) {
fprintf(stderr, "cannot allocate %ld bytes for script\n", script_stat.st_size);
return -1;
}
script_file = fopen(script_path, "r");
if (!script_file) {
perror("cannot open script file");
return -1;
}
records_read = fread(script, script_stat.st_size, 1, script_file);
if (records_read != 1) {
fprintf(stderr, "error reading script %s\n", script_path);
return -1;
}
/* success */
return 0;
}
int main() {
load_script("script.lua");
lua_State *L = luaL_newstate();
luaL_openlibs(L);
lua_pushcfunction(L, lua_my_fun);
lua_setglobal(L, "my_fun");
if (luaL_loadstring(L, script)) {
fprintf(stderr, "error in script:\n %s\n:%s\n", script, lua_tostring(L, -1));
}
}
$ cc my.c -o a -l lua && ./a
error in script:
local my_callback = function(exit_code, stdout, stderr)
print 'Hello from callback';
end
my_fun = print;
--print 'Hello from lua';
my_fun(
'ls',
'-lah',
'/',
my_callback);
--print 'Goodbye from lua';
A
:[string "local my_callback = function(exit_code, stdout, stderr)..."]:13: '=' expected near 'char(2)'
In the same time, when I delete comments in script.lua, it executes
correctly. What is wrong?
Thanks for any help!
PS.
$ lua -v
Lua 5.1.5 Copyright (C) 1994-2012 Lua.org, PUC-Rio
--
Best regards,
Bασιλίσκος Arcticus ὑπέρnihilisticus
(aka Ivan Baidakou) <basiliscos@openmailbox.org>