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quickjs-libc.c
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/*
* QuickJS C library
*
* Copyright (c) 2017-2021 Fabrice Bellard
* Copyright (c) 2017-2021 Charlie Gordon
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <inttypes.h>
#include <string.h>
#include <assert.h>
#if !defined(_MSC_VER)
#include <unistd.h>
#endif
#include <errno.h>
#include <fcntl.h>
#if !defined(_MSC_VER)
#include <sys/time.h>
#endif
#include <time.h>
#include <signal.h>
#include <limits.h>
#include <sys/stat.h>
#if defined(_MSC_VER)
#include "dirent_compat.h"
#else
#include <dirent.h>
#endif
#if defined(_WIN32)
#include <windows.h>
#include <direct.h>
#include <io.h>
#include <conio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/utime.h>
#define popen _popen
#define pclose _pclose
#define rmdir _rmdir
#define getcwd _getcwd
#define chdir _chdir
#else
#include <sys/ioctl.h>
#if !defined(__wasi__)
#include <dlfcn.h>
#include <termios.h>
#include <sys/resource.h>
#include <sys/wait.h>
#endif
#if defined(__APPLE__)
typedef sig_t sighandler_t;
#include <crt_externs.h>
#define environ (*_NSGetEnviron())
#endif
#if defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__NetBSD__)
typedef sig_t sighandler_t;
extern char **environ;
#endif
#endif /* _WIN32 */
#if !defined(_WIN32) && !defined(__wasi__)
/* enable the os.Worker API. IT relies on POSIX threads */
#define USE_WORKER
#endif
#ifdef USE_WORKER
#include <pthread.h>
#include "quickjs-c-atomics.h"
#endif
#include "cutils.h"
#include "list.h"
#include "quickjs-libc.h"
#ifndef MAX_SAFE_INTEGER // already defined in amalgamation builds
#define MAX_SAFE_INTEGER (((int64_t) 1 << 53) - 1)
#endif
#ifndef QJS_NATIVE_MODULE_SUFFIX
#ifdef _WIN32
#define QJS_NATIVE_MODULE_SUFFIX ".dll"
#else
#define QJS_NATIVE_MODULE_SUFFIX ".so"
#endif
#endif
/* TODO:
- add socket calls
*/
typedef struct {
struct list_head link;
int fd;
JSValue rw_func[2];
} JSOSRWHandler;
typedef struct {
struct list_head link;
int sig_num;
JSValue func;
} JSOSSignalHandler;
typedef struct {
struct list_head link;
int64_t timer_id;
uint8_t repeats:1;
int64_t timeout;
int64_t delay;
JSValue func;
} JSOSTimer;
typedef struct {
struct list_head link;
uint8_t *data;
size_t data_len;
/* list of SharedArrayBuffers, necessary to free the message */
uint8_t **sab_tab;
size_t sab_tab_len;
} JSWorkerMessage;
typedef struct {
int ref_count;
#ifdef USE_WORKER
pthread_mutex_t mutex;
#endif
struct list_head msg_queue; /* list of JSWorkerMessage.link */
int read_fd;
int write_fd;
} JSWorkerMessagePipe;
typedef struct {
struct list_head link;
JSWorkerMessagePipe *recv_pipe;
JSValue on_message_func;
} JSWorkerMessageHandler;
typedef struct JSThreadState {
struct list_head os_rw_handlers; /* list of JSOSRWHandler.link */
struct list_head os_signal_handlers; /* list JSOSSignalHandler.link */
struct list_head os_timers; /* list of JSOSTimer.link */
struct list_head port_list; /* list of JSWorkerMessageHandler.link */
int eval_script_recurse; /* only used in the main thread */
int64_t next_timer_id; /* for setTimeout / setInterval */
bool can_js_os_poll;
/* not used in the main thread */
JSWorkerMessagePipe *recv_pipe, *send_pipe;
JSClassID std_file_class_id;
JSClassID worker_class_id;
} JSThreadState;
static uint64_t os_pending_signals;
static void *js_std_dbuf_realloc(void *opaque, void *ptr, size_t size)
{
JSRuntime *rt = opaque;
return js_realloc_rt(rt, ptr, size);
}
static void js_std_dbuf_init(JSContext *ctx, DynBuf *s)
{
dbuf_init2(s, JS_GetRuntime(ctx), js_std_dbuf_realloc);
}
static bool my_isdigit(int c)
{
return (c >= '0' && c <= '9');
}
static JSThreadState *js_get_thread_state(JSRuntime *rt)
{
return (JSThreadState *)js_std_cmd(/*GetOpaque*/0, rt);
}
static void js_set_thread_state(JSRuntime *rt, JSThreadState *ts)
{
js_std_cmd(/*SetOpaque*/1, rt, ts);
}
// Non-CL Clang on Windows does not define __GNUC__
#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
#endif // __GNUC__ || __clang__
static JSValue js_printf_internal(JSContext *ctx,
int argc, JSValueConst *argv, FILE *fp)
{
char fmtbuf[32];
uint8_t cbuf[UTF8_CHAR_LEN_MAX+1];
JSValue res;
DynBuf dbuf;
const char *fmt_str = NULL;
const uint8_t *fmt, *fmt_end;
const uint8_t *p;
char *q;
int i, c, len, mod;
size_t fmt_len;
int32_t int32_arg;
int64_t int64_arg;
double double_arg;
const char *string_arg;
js_std_dbuf_init(ctx, &dbuf);
if (argc > 0) {
fmt_str = JS_ToCStringLen(ctx, &fmt_len, argv[0]);
if (!fmt_str)
goto fail;
i = 1;
fmt = (const uint8_t *)fmt_str;
fmt_end = fmt + fmt_len;
while (fmt < fmt_end) {
for (p = fmt; fmt < fmt_end && *fmt != '%'; fmt++)
continue;
dbuf_put(&dbuf, p, fmt - p);
if (fmt >= fmt_end)
break;
q = fmtbuf;
*q++ = *fmt++; /* copy '%' */
/* flags */
for(;;) {
c = *fmt;
if (c == '0' || c == '#' || c == '+' || c == '-' || c == ' ' ||
c == '\'') {
if (q >= fmtbuf + sizeof(fmtbuf) - 1)
goto invalid;
*q++ = c;
fmt++;
} else {
break;
}
}
/* width */
if (*fmt == '*') {
if (i >= argc)
goto missing;
if (JS_ToInt32(ctx, &int32_arg, argv[i++]))
goto fail;
q += snprintf(q, fmtbuf + sizeof(fmtbuf) - q, "%d", int32_arg);
fmt++;
} else {
while (my_isdigit(*fmt)) {
if (q >= fmtbuf + sizeof(fmtbuf) - 1)
goto invalid;
*q++ = *fmt++;
}
}
if (*fmt == '.') {
if (q >= fmtbuf + sizeof(fmtbuf) - 1)
goto invalid;
*q++ = *fmt++;
if (*fmt == '*') {
if (i >= argc)
goto missing;
if (JS_ToInt32(ctx, &int32_arg, argv[i++]))
goto fail;
q += snprintf(q, fmtbuf + sizeof(fmtbuf) - q, "%d", int32_arg);
fmt++;
} else {
while (my_isdigit(*fmt)) {
if (q >= fmtbuf + sizeof(fmtbuf) - 1)
goto invalid;
*q++ = *fmt++;
}
}
}
/* we only support the "l" modifier for 64 bit numbers */
mod = ' ';
if (*fmt == 'l') {
mod = *fmt++;
}
/* type */
c = *fmt++;
if (q >= fmtbuf + sizeof(fmtbuf) - 1)
goto invalid;
*q++ = c;
*q = '\0';
switch (c) {
case 'c':
if (i >= argc)
goto missing;
if (JS_IsString(argv[i])) {
// TODO(chqrlie) need an API to wrap charCodeAt and codePointAt */
string_arg = JS_ToCString(ctx, argv[i++]);
if (!string_arg)
goto fail;
int32_arg = utf8_decode((const uint8_t *)string_arg, &p);
JS_FreeCString(ctx, string_arg);
} else {
if (JS_ToInt32(ctx, &int32_arg, argv[i++]))
goto fail;
}
// XXX: throw an exception?
if ((unsigned)int32_arg > 0x10FFFF)
int32_arg = 0xFFFD;
/* ignore conversion flags, width and precision */
len = utf8_encode(cbuf, int32_arg);
dbuf_put(&dbuf, cbuf, len);
break;
case 'd':
case 'i':
case 'o':
case 'u':
case 'x':
case 'X':
if (i >= argc)
goto missing;
if (JS_ToInt64Ext(ctx, &int64_arg, argv[i++]))
goto fail;
if (mod == 'l') {
/* 64 bit number */
#if defined(_WIN32)
if (q >= fmtbuf + sizeof(fmtbuf) - 3)
goto invalid;
q[2] = q[-1];
q[-1] = 'I';
q[0] = '6';
q[1] = '4';
q[3] = '\0';
dbuf_printf(&dbuf, fmtbuf, (int64_t)int64_arg);
#else
if (q >= fmtbuf + sizeof(fmtbuf) - 2)
goto invalid;
q[1] = q[-1];
q[-1] = q[0] = 'l';
q[2] = '\0';
dbuf_printf(&dbuf, fmtbuf, (long long)int64_arg);
#endif
} else {
dbuf_printf(&dbuf, fmtbuf, (int)int64_arg);
}
break;
case 's':
if (i >= argc)
goto missing;
/* XXX: handle strings containing null characters */
string_arg = JS_ToCString(ctx, argv[i++]);
if (!string_arg)
goto fail;
dbuf_printf(&dbuf, fmtbuf, string_arg);
JS_FreeCString(ctx, string_arg);
break;
case 'e':
case 'f':
case 'g':
case 'a':
case 'E':
case 'F':
case 'G':
case 'A':
if (i >= argc)
goto missing;
if (JS_ToFloat64(ctx, &double_arg, argv[i++]))
goto fail;
dbuf_printf(&dbuf, fmtbuf, double_arg);
break;
case '%':
dbuf_putc(&dbuf, '%');
break;
default:
/* XXX: should support an extension mechanism */
invalid:
JS_ThrowTypeError(ctx, "invalid conversion specifier in format string");
goto fail;
missing:
JS_ThrowReferenceError(ctx, "missing argument for conversion specifier");
goto fail;
}
}
JS_FreeCString(ctx, fmt_str);
}
if (dbuf.error) {
res = JS_ThrowOutOfMemory(ctx);
} else {
if (fp) {
len = fwrite(dbuf.buf, 1, dbuf.size, fp);
res = JS_NewInt32(ctx, len);
} else {
res = JS_NewStringLen(ctx, (char *)dbuf.buf, dbuf.size);
}
}
dbuf_free(&dbuf);
return res;
fail:
JS_FreeCString(ctx, fmt_str);
dbuf_free(&dbuf);
return JS_EXCEPTION;
}
#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic pop // ignored "-Wformat-nonliteral"
#endif // __GNUC__ || __clang__
uint8_t *js_load_file(JSContext *ctx, size_t *pbuf_len, const char *filename)
{
FILE *f;
size_t n, len;
uint8_t *p, *buf, tmp[8192];
f = fopen(filename, "rb");
if (!f)
return NULL;
buf = NULL;
len = 0;
do {
n = fread(tmp, 1, sizeof(tmp), f);
if (ctx) {
p = js_realloc(ctx, buf, len + n + 1);
} else {
p = realloc(buf, len + n + 1);
}
if (!p) {
if (ctx) {
js_free(ctx, buf);
} else {
free(buf);
}
fclose(f);
return NULL;
}
memcpy(&p[len], tmp, n);
buf = p;
len += n;
buf[len] = '\0';
} while (n == sizeof(tmp));
fclose(f);
*pbuf_len = len;
return buf;
}
/* load and evaluate a file */
static JSValue js_loadScript(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
uint8_t *buf;
const char *filename;
JSValue ret;
size_t buf_len;
filename = JS_ToCString(ctx, argv[0]);
if (!filename)
return JS_EXCEPTION;
buf = js_load_file(ctx, &buf_len, filename);
if (!buf) {
JS_ThrowReferenceError(ctx, "could not load '%s'", filename);
JS_FreeCString(ctx, filename);
return JS_EXCEPTION;
}
ret = JS_Eval(ctx, (char *)buf, buf_len, filename,
JS_EVAL_TYPE_GLOBAL);
js_free(ctx, buf);
JS_FreeCString(ctx, filename);
return ret;
}
static int get_bool_option(JSContext *ctx, bool *pbool,
JSValueConst obj,
const char *option)
{
JSValue val;
val = JS_GetPropertyStr(ctx, obj, option);
if (JS_IsException(val))
return -1;
if (!JS_IsUndefined(val)) {
*pbool = JS_ToBool(ctx, val);
}
JS_FreeValue(ctx, val);
return 0;
}
static void free_buf(JSRuntime *rt, void *opaque, void *ptr) {
js_free_rt(rt, ptr);
}
/* load a file as a UTF-8 encoded string or Uint8Array */
static JSValue js_std_loadFile(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
uint8_t *buf;
const char *filename;
JSValueConst options_obj;
JSValue ret;
size_t buf_len;
bool binary = false;
if (argc >= 2) {
options_obj = argv[1];
if (get_bool_option(ctx, &binary, options_obj,
"binary"))
return JS_EXCEPTION;
}
filename = JS_ToCString(ctx, argv[0]);
if (!filename)
return JS_EXCEPTION;
buf = js_load_file(ctx, &buf_len, filename);
JS_FreeCString(ctx, filename);
if (!buf)
return JS_NULL;
if (binary) {
ret = JS_NewUint8Array(ctx, buf, buf_len, free_buf, NULL, false);
} else {
ret = JS_NewStringLen(ctx, (char *)buf, buf_len);
js_free(ctx, buf);
}
return ret;
}
static JSValue js_std_writeFile(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
const char *filename;
const char *mode;
const void *buf;
size_t len, n;
JSValueConst data;
JSValue val, ret, unref;
bool release;
FILE *fp;
ret = JS_EXCEPTION;
len = 0;
buf = "";
mode = "w";
data = argv[1];
unref = JS_UNDEFINED;
release = false;
filename = JS_ToCString(ctx, argv[0]);
if (!filename)
return JS_EXCEPTION;
if (JS_IsObject(data)) {
val = JS_GetPropertyStr(ctx, data, "buffer");
if (JS_IsException(val))
goto exception;
if (JS_IsArrayBuffer(val)) {
data = unref = val;
} else {
JS_FreeValue(ctx, val);
}
}
if (JS_IsArrayBuffer(data)) {
buf = JS_GetArrayBuffer(ctx, &len, data);
mode = "wb";
} else if (!JS_IsUndefined(data)) {
buf = JS_ToCStringLen(ctx, &len, data);
release = true;
}
if (!buf)
goto exception;
fp = fopen(filename, mode);
if (!fp) {
JS_ThrowPlainError(ctx, "error opening %s for writing", filename);
goto exception;
}
n = fwrite(buf, len, 1, fp);
fclose(fp);
if (n != 1) {
JS_ThrowPlainError(ctx, "error writing to %s", filename);
goto exception;
}
ret = JS_UNDEFINED;
exception:
JS_FreeCString(ctx, filename);
if (release)
JS_FreeCString(ctx, buf);
JS_FreeValue(ctx, unref);
return ret;
}
typedef JSModuleDef *(JSInitModuleFunc)(JSContext *ctx,
const char *module_name);
#if defined(_WIN32)
static JSModuleDef *js_module_loader_so(JSContext *ctx,
const char *module_name)
{
JSModuleDef *m;
HINSTANCE hd;
JSInitModuleFunc *init;
char *filename = NULL;
size_t len = strlen(module_name);
bool is_absolute = len > 2 && ((module_name[0] >= 'A' && module_name[0] <= 'Z') ||
(module_name[0] >= 'a' && module_name[0] <= 'z')) && module_name[1] == ':';
bool is_relative = len > 2 && module_name[0] == '.' && (module_name[1] == '/' || module_name[1] == '\\');
if (is_absolute || is_relative) {
filename = (char *)module_name;
} else {
filename = js_malloc(ctx, len + 2 + 1);
if (!filename)
return NULL;
strcpy(filename, "./");
strcpy(filename + 2, module_name);
}
hd = LoadLibraryA(filename);
if (filename != module_name)
js_free(ctx, filename);
if (hd == NULL) {
JS_ThrowReferenceError(ctx, "js_load_module '%s' error: %lu",
module_name, GetLastError());
goto fail;
}
init = (JSInitModuleFunc *)(uintptr_t)GetProcAddress(hd, "js_init_module");
if (!init) {
JS_ThrowReferenceError(ctx, "js_init_module '%s' not found: %lu",
module_name, GetLastError());
goto fail;
}
m = init(ctx, module_name);
if (!m) {
JS_ThrowReferenceError(ctx, "js_call_module '%s' initialization error",
module_name);
fail:
if (hd != NULL)
FreeLibrary(hd);
return NULL;
}
return m;
}
#elif defined(__wasi__)
static JSModuleDef *js_module_loader_so(JSContext *ctx,
const char *module_name)
{
JS_ThrowReferenceError(ctx, "shared library modules are not supported yet");
return NULL;
}
#else
static JSModuleDef *js_module_loader_so(JSContext *ctx,
const char *module_name)
{
JSModuleDef *m;
void *hd;
JSInitModuleFunc *init;
char *filename;
if (!strchr(module_name, '/')) {
/* must add a '/' so that the DLL is not searched in the
system library paths */
filename = js_malloc(ctx, strlen(module_name) + 2 + 1);
if (!filename)
return NULL;
strcpy(filename, "./");
strcpy(filename + 2, module_name);
} else {
filename = (char *)module_name;
}
/* C module */
hd = dlopen(filename, RTLD_NOW | RTLD_LOCAL);
if (filename != module_name)
js_free(ctx, filename);
if (!hd) {
JS_ThrowReferenceError(ctx, "could not load module filename '%s' as shared library: %s",
module_name, dlerror());
goto fail;
}
*(void **) (&init) = dlsym(hd, "js_init_module");
if (!init) {
JS_ThrowReferenceError(ctx, "could not load module filename '%s': js_init_module not found",
module_name);
goto fail;
}
m = init(ctx, module_name);
if (!m) {
JS_ThrowReferenceError(ctx, "could not load module filename '%s': initialization error",
module_name);
fail:
if (hd)
dlclose(hd);
return NULL;
}
return m;
}
#endif /* !_WIN32 */
int js_module_set_import_meta(JSContext *ctx, JSValueConst func_val,
bool use_realpath, bool is_main)
{
JSModuleDef *m;
char buf[PATH_MAX + 16];
JSValue meta_obj;
JSAtom module_name_atom;
const char *module_name;
assert(JS_VALUE_GET_TAG(func_val) == JS_TAG_MODULE);
m = JS_VALUE_GET_PTR(func_val);
module_name_atom = JS_GetModuleName(ctx, m);
module_name = JS_AtomToCString(ctx, module_name_atom);
JS_FreeAtom(ctx, module_name_atom);
if (!module_name)
return -1;
if (!strchr(module_name, ':')) {
strcpy(buf, "file://");
#if !defined(_WIN32) && !defined(__wasi__)
/* realpath() cannot be used with modules compiled with qjsc
because the corresponding module source code is not
necessarily present */
if (use_realpath) {
char *res = realpath(module_name, buf + strlen(buf));
if (!res) {
JS_ThrowTypeError(ctx, "realpath failure");
JS_FreeCString(ctx, module_name);
return -1;
}
} else
#endif
{
js__pstrcat(buf, sizeof(buf), module_name);
}
} else {
js__pstrcpy(buf, sizeof(buf), module_name);
}
JS_FreeCString(ctx, module_name);
meta_obj = JS_GetImportMeta(ctx, m);
if (JS_IsException(meta_obj))
return -1;
JS_DefinePropertyValueStr(ctx, meta_obj, "url",
JS_NewString(ctx, buf),
JS_PROP_C_W_E);
JS_DefinePropertyValueStr(ctx, meta_obj, "main",
JS_NewBool(ctx, is_main),
JS_PROP_C_W_E);
JS_FreeValue(ctx, meta_obj);
return 0;
}
JSModuleDef *js_module_loader(JSContext *ctx,
const char *module_name, void *opaque)
{
JSModuleDef *m;
if (js__has_suffix(module_name, QJS_NATIVE_MODULE_SUFFIX)) {
m = js_module_loader_so(ctx, module_name);
} else {
size_t buf_len;
uint8_t *buf;
JSValue func_val;
buf = js_load_file(ctx, &buf_len, module_name);
if (!buf) {
JS_ThrowReferenceError(ctx, "could not load module filename '%s'",
module_name);
return NULL;
}
/* compile the module */
func_val = JS_Eval(ctx, (char *)buf, buf_len, module_name,
JS_EVAL_TYPE_MODULE | JS_EVAL_FLAG_COMPILE_ONLY);
js_free(ctx, buf);
if (JS_IsException(func_val))
return NULL;
if (js_module_set_import_meta(ctx, func_val, true, false) < 0) {
JS_FreeValue(ctx, func_val);
return NULL;
}
/* the module is already referenced, so we must free it */
m = JS_VALUE_GET_PTR(func_val);
JS_FreeValue(ctx, func_val);
}
return m;
}
static JSValue js_std_exit(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
int status;
if (JS_ToInt32(ctx, &status, argv[0]))
status = -1;
exit(status);
return JS_UNDEFINED;
}
static JSValue js_std_getenv(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
const char *name, *str;
name = JS_ToCString(ctx, argv[0]);
if (!name)
return JS_EXCEPTION;
str = getenv(name);
JS_FreeCString(ctx, name);
if (!str)
return JS_UNDEFINED;
else
return JS_NewString(ctx, str);
}
#if defined(_WIN32)
static void setenv(const char *name, const char *value, int overwrite)
{
char *str;
size_t name_len, value_len;
name_len = strlen(name);
value_len = strlen(value);
str = malloc(name_len + 1 + value_len + 1);
memcpy(str, name, name_len);
str[name_len] = '=';
memcpy(str + name_len + 1, value, value_len);
str[name_len + 1 + value_len] = '\0';
_putenv(str);
free(str);
}
static void unsetenv(const char *name)
{
setenv(name, "", true);
}
#endif /* _WIN32 */
static JSValue js_std_setenv(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
const char *name, *value;
name = JS_ToCString(ctx, argv[0]);
if (!name)
return JS_EXCEPTION;
value = JS_ToCString(ctx, argv[1]);
if (!value) {
JS_FreeCString(ctx, name);
return JS_EXCEPTION;
}
setenv(name, value, true);
JS_FreeCString(ctx, name);
JS_FreeCString(ctx, value);
return JS_UNDEFINED;
}
static JSValue js_std_unsetenv(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
const char *name;
name = JS_ToCString(ctx, argv[0]);
if (!name)
return JS_EXCEPTION;
unsetenv(name);
JS_FreeCString(ctx, name);
return JS_UNDEFINED;
}
/* return an object containing the list of the available environment
variables. */
static JSValue js_std_getenviron(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
char **envp;
const char *name, *p, *value;
JSValue obj;
uint32_t idx;
size_t name_len;
JSAtom atom;
int ret;
obj = JS_NewObject(ctx);
if (JS_IsException(obj))
return JS_EXCEPTION;
envp = environ;
for(idx = 0; envp[idx] != NULL; idx++) {
name = envp[idx];
p = strchr(name, '=');
name_len = p - name;
if (!p)
continue;
value = p + 1;
atom = JS_NewAtomLen(ctx, name, name_len);
if (atom == JS_ATOM_NULL)
goto fail;
ret = JS_DefinePropertyValue(ctx, obj, atom, JS_NewString(ctx, value),
JS_PROP_C_W_E);
JS_FreeAtom(ctx, atom);
if (ret < 0)
goto fail;
}
return obj;
fail:
JS_FreeValue(ctx, obj);
return JS_EXCEPTION;
}
static JSValue js_std_gc(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
JS_RunGC(JS_GetRuntime(ctx));
return JS_UNDEFINED;
}
static int interrupt_handler(JSRuntime *rt, void *opaque)
{
return (os_pending_signals >> SIGINT) & 1;
}
static JSValue js_evalScript(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
JSRuntime *rt = JS_GetRuntime(ctx);
JSThreadState *ts = js_get_thread_state(rt);
const char *str = NULL;
size_t len;
JSValue ret, obj;
JSValueConst options_obj, arg;
bool backtrace_barrier = false;
bool eval_function = false;
bool eval_module = false;
bool compile_only = false;
bool compile_module = false;
bool is_async = false;
int flags;
if (argc >= 2) {
options_obj = argv[1];
if (get_bool_option(ctx, &backtrace_barrier, options_obj,
"backtrace_barrier"))
return JS_EXCEPTION;
if (get_bool_option(ctx, &eval_function, options_obj,
"eval_function"))
return JS_EXCEPTION;
if (get_bool_option(ctx, &eval_module, options_obj,
"eval_module"))
return JS_EXCEPTION;
if (get_bool_option(ctx, &compile_only, options_obj,
"compile_only"))
return JS_EXCEPTION;
if (get_bool_option(ctx, &compile_module, options_obj,
"compile_module"))
return JS_EXCEPTION;
if (get_bool_option(ctx, &is_async, options_obj,
"async"))
return JS_EXCEPTION;
}
if (eval_module) {
arg = argv[0];
if (JS_VALUE_GET_TAG(arg) != JS_TAG_MODULE)
return JS_ThrowTypeError(ctx, "not a module");
if (JS_ResolveModule(ctx, arg) < 0)
return JS_EXCEPTION;
if (js_module_set_import_meta(ctx, arg, false, false) < 0)
return JS_EXCEPTION;
return JS_EvalFunction(ctx, JS_DupValue(ctx, arg));
}
if (!eval_function) {
str = JS_ToCStringLen(ctx, &len, argv[0]);
if (!str)
return JS_EXCEPTION;
}
if (!ts->recv_pipe && ++ts->eval_script_recurse == 1) {
/* install the interrupt handler */
JS_SetInterruptHandler(JS_GetRuntime(ctx), interrupt_handler, NULL);
}
flags = compile_module ? JS_EVAL_TYPE_MODULE : JS_EVAL_TYPE_GLOBAL;
if (backtrace_barrier)
flags |= JS_EVAL_FLAG_BACKTRACE_BARRIER;
if (compile_only)
flags |= JS_EVAL_FLAG_COMPILE_ONLY;
if (is_async)
flags |= JS_EVAL_FLAG_ASYNC;
if (eval_function) {
obj = JS_DupValue(ctx, argv[0]);
ret = JS_EvalFunction(ctx, obj); // takes ownership of |obj|
} else {
ret = JS_Eval(ctx, str, len, "<evalScript>", flags);