Function js_os_exec

deps/quickjs/quickjs-libc.c:3571–3816

exec(args[, options]) -> exitcode */

/* exec(args[, options]) -> exitcode */
static JSValue js_os_exec(JSContext *ctx, JSValueConst this_val,
                          int argc, JSValueConst *argv)
{
    JSValueConst options, args = argv[0];
    JSValue val, ret_val;
    const char **exec_argv, *file = NULL, *str, *cwd = NULL;
    char **envp = environ;
    uint32_t exec_argc, i;
    int ret, pid, status;
    bool block_flag = true, use_path = true;
    static const char *std_name[3] = { "stdin", "stdout", "stderr" };
    int std_fds[3];
    uint32_t uid = -1, gid = -1;
    int ngroups = -1;
    gid_t groups[64];

    val = JS_GetPropertyStr(ctx, args, "length");
    if (JS_IsException(val))
        return JS_EXCEPTION;
    ret = JS_ToUint32(ctx, &exec_argc, val);
    JS_FreeValue(ctx, val);
    if (ret)
        return JS_EXCEPTION;
    /* arbitrary limit to avoid overflow */
    if (exec_argc < 1 || exec_argc > 65535) {
        return JS_ThrowTypeError(ctx, "invalid number of arguments");
    }
    exec_argv = js_mallocz(ctx, sizeof(exec_argv[0]) * (exec_argc + 1));
    if (!exec_argv)
        return JS_EXCEPTION;
    for(i = 0; i < exec_argc; i++) {
        val = JS_GetPropertyUint32(ctx, args, i);
        if (JS_IsException(val))
            goto exception;
        str = JS_ToCString(ctx, val);
        JS_FreeValue(ctx, val);
        if (!str)
            goto exception;
        exec_argv[i] = str;
    }
    exec_argv[exec_argc] = NULL;

    for(i = 0; i < 3; i++)
        std_fds[i] = i;

    /* get the options, if any */
    if (argc >= 2) {
        options = argv[1];

        if (get_bool_option(ctx, &block_flag, options, "block"))
            goto exception;
        if (get_bool_option(ctx, &use_path, options, "usePath"))
            goto exception;

        val = JS_GetPropertyStr(ctx, options, "file");
        if (JS_IsException(val))
            goto exception;
        if (!JS_IsUndefined(val)) {