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add default value for process:read* functions 

This time with more checks against scrutiny
This commit is contained in:
takase1121 2021-07-09 08:37:56 +08:00
parent 8ebb40798b
commit 3c15d99cec
1 changed files with 6 additions and 1 deletions
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7
src/api/process.c
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@ -10,6 +10,8 @@
#include <reproc/reproc.h>
#include "api.h"
#define READ_BUF_SIZE 2048
#define L_GETTABLE(L, idx, key, conv, def) ( \
lua_getfield(L, idx, key), \
conv(L, -1, def) \
@ -228,7 +230,7 @@ static int f_returncode(lua_State *L)
static int g_read(lua_State* L, int stream)
{
process_t* self = (process_t*) luaL_checkudata(L, 1, API_TYPE_PROCESS);
unsigned long read_size = luaL_checkunsigned(L, 2);
unsigned long read_size = luaL_optunsigned(L, 2, READ_BUF_SIZE);
luaL_Buffer b;
uint8_t* buffer = (uint8_t*) luaL_buffinitsize(L, &b, read_size);
@ -266,6 +268,9 @@ static int f_read(lua_State* L)
{
int stream = luaL_checknumber(L, 2);
lua_remove(L, 2);
if (stream > REPROC_STREAM_ERR)
L_RETURN_REPROC_ERROR(L, REPROC_EINVAL);
return g_read(L, stream);
}