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283 lines (253 loc) · 9.6 KB
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// SPDX-FileCopyrightText: 2014 MicroPython & CircuitPython contributors (https://github.com/adafruit/circuitpython/graphs/contributors)
// SPDX-FileCopyrightText: Copyright (c) 2013-2018 Damien P. George
//
// SPDX-License-Identifier: MIT
#include "py/mphal.h"
#include "py/mpthread.h"
#include "py/runtime.h"
#include "py/stream.h"
#include "extmod/vfs_posix.h"
#include "supervisor/shared/translate/translate.h"
#if (defined(MICROPY_VFS_POSIX) && MICROPY_VFS_POSIX) || (defined(MICROPY_VFS_POSIX_FILE) && MICROPY_VFS_POSIX_FILE)
#include <fcntl.h>
#include <unistd.h>
#ifdef _WIN32
#define fsync _commit
#else
#include <poll.h>
#endif
typedef struct _mp_obj_vfs_posix_file_t {
mp_obj_base_t base;
int fd;
} mp_obj_vfs_posix_file_t;
#ifdef MICROPY_CPYTHON_COMPAT
STATIC void check_fd_is_open(const mp_obj_vfs_posix_file_t *o) {
if (o->fd < 0) {
mp_raise_ValueError(MP_ERROR_TEXT("I/O operation on closed file"));
}
}
#else
#define check_fd_is_open(o)
#endif
STATIC void vfs_posix_file_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
(void)kind;
mp_obj_vfs_posix_file_t *self = MP_OBJ_TO_PTR(self_in);
mp_printf(print, "<io.%q %d>", mp_obj_get_type_qstr(self_in), self->fd);
}
mp_obj_t mp_vfs_posix_file_open(const mp_obj_type_t *type, mp_obj_t file_in, mp_obj_t mode_in) {
mp_obj_vfs_posix_file_t *o = m_new_obj(mp_obj_vfs_posix_file_t);
const char *mode_s = mp_obj_str_get_str(mode_in);
int mode_rw = 0, mode_x = 0;
while (*mode_s) {
switch (*mode_s++) {
case 'r':
mode_rw = O_RDONLY;
break;
case 'w':
mode_rw = O_WRONLY;
mode_x = O_CREAT | O_TRUNC;
break;
case 'a':
mode_rw = O_WRONLY;
mode_x = O_CREAT | O_APPEND;
break;
case '+':
mode_rw = O_RDWR;
break;
#if MICROPY_PY_IO_FILEIO
// If we don't have io.FileIO, then files are in text mode implicitly
case 'b':
type = &mp_type_vfs_posix_fileio;
break;
case 't':
type = &mp_type_vfs_posix_textio;
break;
#endif
}
}
o->base.type = type;
mp_obj_t fid = file_in;
if (mp_obj_is_small_int(fid)) {
o->fd = MP_OBJ_SMALL_INT_VALUE(fid);
return MP_OBJ_FROM_PTR(o);
}
const char *fname = mp_obj_str_get_str(fid);
int fd;
MP_HAL_RETRY_SYSCALL(fd, open(fname, mode_x | mode_rw, 0644), mp_raise_OSError(err));
o->fd = fd;
return MP_OBJ_FROM_PTR(o);
}
STATIC mp_obj_t vfs_posix_file_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_file, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_rom_obj = MP_ROM_NONE} },
{ MP_QSTR_mode, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_QSTR(MP_QSTR_r)} },
};
mp_arg_val_t arg_vals[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all_kw_array(n_args, n_kw, args, MP_ARRAY_SIZE(allowed_args), allowed_args, arg_vals);
return mp_vfs_posix_file_open(type, arg_vals[0].u_obj, arg_vals[1].u_obj);
}
STATIC mp_obj_t vfs_posix_file_fileno(mp_obj_t self_in) {
mp_obj_vfs_posix_file_t *self = MP_OBJ_TO_PTR(self_in);
check_fd_is_open(self);
return MP_OBJ_NEW_SMALL_INT(self->fd);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(vfs_posix_file_fileno_obj, vfs_posix_file_fileno);
STATIC mp_obj_t vfs_posix_file___exit__(size_t n_args, const mp_obj_t *args) {
(void)n_args;
return mp_stream_close(args[0]);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(vfs_posix_file___exit___obj, 4, 4, vfs_posix_file___exit__);
STATIC mp_uint_t vfs_posix_file_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errcode) {
mp_obj_vfs_posix_file_t *o = MP_OBJ_TO_PTR(o_in);
check_fd_is_open(o);
ssize_t r;
MP_HAL_RETRY_SYSCALL(r, read(o->fd, buf, size), {
*errcode = err;
return MP_STREAM_ERROR;
});
return (mp_uint_t)r;
}
STATIC mp_uint_t vfs_posix_file_write(mp_obj_t o_in, const void *buf, mp_uint_t size, int *errcode) {
mp_obj_vfs_posix_file_t *o = MP_OBJ_TO_PTR(o_in);
check_fd_is_open(o);
ssize_t r;
MP_HAL_RETRY_SYSCALL(r, write(o->fd, buf, size), {
*errcode = err;
return MP_STREAM_ERROR;
});
return (mp_uint_t)r;
}
STATIC mp_uint_t vfs_posix_file_ioctl(mp_obj_t o_in, mp_uint_t request, uintptr_t arg, int *errcode) {
mp_obj_vfs_posix_file_t *o = MP_OBJ_TO_PTR(o_in);
if (request != MP_STREAM_CLOSE) {
check_fd_is_open(o);
}
switch (request) {
case MP_STREAM_FLUSH: {
int ret;
MP_HAL_RETRY_SYSCALL(ret, fsync(o->fd), {
if (err == EINVAL
&& (o->fd == STDIN_FILENO || o->fd == STDOUT_FILENO || o->fd == STDERR_FILENO)) {
// fsync(stdin/stdout/stderr) may fail with EINVAL, but don't propagate that
// error out. Because data is not buffered by us, and stdin/out/err.flush()
// should just be a no-op.
return 0;
}
*errcode = err;
return MP_STREAM_ERROR;
});
return 0;
}
case MP_STREAM_SEEK: {
struct mp_stream_seek_t *s = (struct mp_stream_seek_t *)arg;
MP_THREAD_GIL_EXIT();
off_t off = lseek(o->fd, s->offset, s->whence);
MP_THREAD_GIL_ENTER();
if (off == (off_t)-1) {
*errcode = errno;
return MP_STREAM_ERROR;
}
s->offset = off;
return 0;
}
case MP_STREAM_CLOSE:
MP_THREAD_GIL_EXIT();
close(o->fd);
MP_THREAD_GIL_ENTER();
#ifdef MICROPY_CPYTHON_COMPAT
o->fd = -1;
#endif
return 0;
case MP_STREAM_GET_FILENO:
return o->fd;
#if MICROPY_PY_USELECT
case MP_STREAM_POLL: {
#ifdef _WIN32
mp_raise_NotImplementedError(MP_ERROR_TEXT("poll on file not available on win32"));
#else
mp_uint_t ret = 0;
uint8_t pollevents = 0;
if (arg & MP_STREAM_POLL_RD) {
pollevents |= POLLIN;
}
if (arg & MP_STREAM_POLL_WR) {
pollevents |= POLLOUT;
}
struct pollfd pfd = { .fd = o->fd, .events = pollevents };
if (poll(&pfd, 1, 0) > 0) {
if (pfd.revents & POLLIN) {
ret |= MP_STREAM_POLL_RD;
}
if (pfd.revents & POLLOUT) {
ret |= MP_STREAM_POLL_WR;
}
}
return ret;
#endif
}
#endif
default:
*errcode = EINVAL;
return MP_STREAM_ERROR;
}
}
STATIC const mp_rom_map_elem_t vfs_posix_rawfile_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_fileno), MP_ROM_PTR(&vfs_posix_file_fileno_obj) },
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
{ MP_ROM_QSTR(MP_QSTR_readlines), MP_ROM_PTR(&mp_stream_unbuffered_readlines_obj) },
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
{ MP_ROM_QSTR(MP_QSTR_seek), MP_ROM_PTR(&mp_stream_seek_obj) },
{ MP_ROM_QSTR(MP_QSTR_tell), MP_ROM_PTR(&mp_stream_tell_obj) },
{ MP_ROM_QSTR(MP_QSTR_flush), MP_ROM_PTR(&mp_stream_flush_obj) },
{ MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) },
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&mp_identity_obj) },
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&vfs_posix_file___exit___obj) },
};
STATIC MP_DEFINE_CONST_DICT(vfs_posix_rawfile_locals_dict, vfs_posix_rawfile_locals_dict_table);
#if MICROPY_PY_IO_FILEIO
STATIC const mp_stream_p_t vfs_posix_fileio_stream_p = {
MP_PROTO_IMPLEMENT(MP_QSTR_protocol_stream)
.read = vfs_posix_file_read,
.write = vfs_posix_file_write,
.ioctl = vfs_posix_file_ioctl,
};
const mp_obj_type_t mp_type_vfs_posix_fileio = {
{ &mp_type_type },
.flags = MP_TYPE_FLAG_EXTENDED,
.name = MP_QSTR_FileIO,
.print = vfs_posix_file_print,
.make_new = vfs_posix_file_make_new,
.locals_dict = (mp_obj_dict_t *)&vfs_posix_rawfile_locals_dict,
MP_TYPE_EXTENDED_FIELDS(
.getiter = mp_identity_getiter,
.iternext = mp_stream_unbuffered_iter,
.protocol = &vfs_posix_fileio_stream_p,
),
};
#endif
STATIC const mp_stream_p_t vfs_posix_textio_stream_p = {
MP_PROTO_IMPLEMENT(MP_QSTR_protocol_stream)
.read = vfs_posix_file_read,
.write = vfs_posix_file_write,
.ioctl = vfs_posix_file_ioctl,
.is_text = true,
};
const mp_obj_type_t mp_type_vfs_posix_textio = {
{ &mp_type_type },
.flags = MP_TYPE_FLAG_EXTENDED,
.name = MP_QSTR_TextIOWrapper,
.print = vfs_posix_file_print,
.make_new = vfs_posix_file_make_new,
.locals_dict = (mp_obj_dict_t *)&vfs_posix_rawfile_locals_dict,
MP_TYPE_EXTENDED_FIELDS(
.getiter = mp_identity_getiter,
.iternext = mp_stream_unbuffered_iter,
.protocol = &vfs_posix_textio_stream_p,
),
};
const mp_obj_vfs_posix_file_t mp_sys_stdin_obj = {{&mp_type_textio}, STDIN_FILENO};
const mp_obj_vfs_posix_file_t mp_sys_stdout_obj = {{&mp_type_textio}, STDOUT_FILENO};
const mp_obj_vfs_posix_file_t mp_sys_stderr_obj = {{&mp_type_textio}, STDERR_FILENO};
#endif // MICROPY_VFS_POSIX || MICROPY_VFS_POSIX_FILE