283 lines
9.4 KiB
C
283 lines
9.4 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013-2018 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/mphal.h"
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#include "py/mpthread.h"
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#include "py/runtime.h"
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#include "py/stream.h"
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#include "extmod/vfs_posix.h"
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#if MICROPY_VFS_POSIX
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#include <fcntl.h>
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#include <unistd.h>
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#if defined(_WIN32) || defined(__sh__)
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#define fsync _commit
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#else
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#include <poll.h>
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#endif
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typedef struct _mp_obj_vfs_posix_file_t {
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mp_obj_base_t base;
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int fd;
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} mp_obj_vfs_posix_file_t;
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#if MICROPY_CPYTHON_COMPAT
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STATIC void check_fd_is_open(const mp_obj_vfs_posix_file_t *o) {
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if (o->fd < 0) {
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mp_raise_ValueError(MP_ERROR_TEXT("I/O operation on closed file"));
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}
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}
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#else
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#define check_fd_is_open(o)
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#endif
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STATIC void vfs_posix_file_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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(void)kind;
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mp_obj_vfs_posix_file_t *self = MP_OBJ_TO_PTR(self_in);
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mp_printf(print, "<io.%s %d>", mp_obj_get_type_str(self_in), self->fd);
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}
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mp_obj_t mp_vfs_posix_file_open(const mp_obj_type_t *type, mp_obj_t file_in, mp_obj_t mode_in) {
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mp_obj_vfs_posix_file_t *o = m_new_obj_with_finaliser(mp_obj_vfs_posix_file_t);
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const char *mode_s = mp_obj_str_get_str(mode_in);
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int mode_rw = 0, mode_x = 0;
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while (*mode_s) {
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switch (*mode_s++) {
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case 'r':
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mode_rw = O_RDONLY;
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break;
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case 'w':
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mode_rw = O_WRONLY;
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mode_x = O_CREAT | O_TRUNC;
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break;
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case 'a':
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mode_rw = O_WRONLY;
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mode_x = O_CREAT | O_APPEND;
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break;
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case '+':
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mode_rw = O_RDWR;
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break;
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case 'b':
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type = &mp_type_vfs_posix_fileio;
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break;
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case 't':
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type = &mp_type_vfs_posix_textio;
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break;
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}
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}
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o->base.type = type;
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mp_obj_t fid = file_in;
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if (mp_obj_is_small_int(fid)) {
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o->fd = MP_OBJ_SMALL_INT_VALUE(fid);
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return MP_OBJ_FROM_PTR(o);
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}
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const char *fname = mp_obj_str_get_str(fid);
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int fd;
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MP_HAL_RETRY_SYSCALL(fd, open(fname, mode_x | mode_rw, 0644), mp_raise_OSError(err));
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o->fd = fd;
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return MP_OBJ_FROM_PTR(o);
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}
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STATIC mp_obj_t vfs_posix_file_fileno(mp_obj_t self_in) {
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mp_obj_vfs_posix_file_t *self = MP_OBJ_TO_PTR(self_in);
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check_fd_is_open(self);
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return MP_OBJ_NEW_SMALL_INT(self->fd);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(vfs_posix_file_fileno_obj, vfs_posix_file_fileno);
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STATIC mp_obj_t vfs_posix_file___exit__(size_t n_args, const mp_obj_t *args) {
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(void)n_args;
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return mp_stream_close(args[0]);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(vfs_posix_file___exit___obj, 4, 4, vfs_posix_file___exit__);
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STATIC mp_uint_t vfs_posix_file_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errcode) {
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mp_obj_vfs_posix_file_t *o = MP_OBJ_TO_PTR(o_in);
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check_fd_is_open(o);
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ssize_t r;
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MP_HAL_RETRY_SYSCALL(r, read(o->fd, buf, size), {
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*errcode = err;
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return MP_STREAM_ERROR;
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});
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return (mp_uint_t)r;
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}
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STATIC mp_uint_t vfs_posix_file_write(mp_obj_t o_in, const void *buf, mp_uint_t size, int *errcode) {
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mp_obj_vfs_posix_file_t *o = MP_OBJ_TO_PTR(o_in);
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check_fd_is_open(o);
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#if MICROPY_PY_OS_DUPTERM
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if (o->fd <= STDERR_FILENO) {
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mp_hal_stdout_tx_strn(buf, size);
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return size;
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}
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#endif
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ssize_t r;
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MP_HAL_RETRY_SYSCALL(r, write(o->fd, buf, size), {
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*errcode = err;
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return MP_STREAM_ERROR;
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});
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return (mp_uint_t)r;
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}
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STATIC mp_uint_t vfs_posix_file_ioctl(mp_obj_t o_in, mp_uint_t request, uintptr_t arg, int *errcode) {
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mp_obj_vfs_posix_file_t *o = MP_OBJ_TO_PTR(o_in);
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if (request != MP_STREAM_CLOSE) {
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check_fd_is_open(o);
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}
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switch (request) {
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case MP_STREAM_FLUSH: {
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int ret;
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MP_HAL_RETRY_SYSCALL(ret, fsync(o->fd), {
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if (err == EINVAL
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&& (o->fd == STDIN_FILENO || o->fd == STDOUT_FILENO || o->fd == STDERR_FILENO)) {
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// fsync(stdin/stdout/stderr) may fail with EINVAL, but don't propagate that
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// error out. Because data is not buffered by us, and stdin/out/err.flush()
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// should just be a no-op.
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return 0;
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}
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*errcode = err;
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return MP_STREAM_ERROR;
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});
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return 0;
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}
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case MP_STREAM_SEEK: {
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struct mp_stream_seek_t *s = (struct mp_stream_seek_t *)arg;
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MP_THREAD_GIL_EXIT();
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off_t off = lseek(o->fd, s->offset, s->whence);
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MP_THREAD_GIL_ENTER();
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if (off == (off_t)-1) {
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*errcode = errno;
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return MP_STREAM_ERROR;
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}
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s->offset = off;
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return 0;
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}
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case MP_STREAM_CLOSE:
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if (o->fd >= 0) {
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MP_THREAD_GIL_EXIT();
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close(o->fd);
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MP_THREAD_GIL_ENTER();
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}
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o->fd = -1;
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return 0;
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case MP_STREAM_GET_FILENO:
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return o->fd;
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#if MICROPY_PY_USELECT
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case MP_STREAM_POLL: {
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#ifdef _WIN32
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mp_raise_NotImplementedError(MP_ERROR_TEXT("poll on file not available on win32"));
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#else
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mp_uint_t ret = 0;
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uint8_t pollevents = 0;
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if (arg & MP_STREAM_POLL_RD) {
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pollevents |= POLLIN;
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}
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if (arg & MP_STREAM_POLL_WR) {
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pollevents |= POLLOUT;
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}
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struct pollfd pfd = { .fd = o->fd, .events = pollevents };
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if (poll(&pfd, 1, 0) > 0) {
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if (pfd.revents & POLLIN) {
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ret |= MP_STREAM_POLL_RD;
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}
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if (pfd.revents & POLLOUT) {
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ret |= MP_STREAM_POLL_WR;
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}
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}
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return ret;
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#endif
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}
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#endif
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default:
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*errcode = EINVAL;
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return MP_STREAM_ERROR;
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}
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}
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STATIC const mp_rom_map_elem_t vfs_posix_rawfile_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_fileno), MP_ROM_PTR(&vfs_posix_file_fileno_obj) },
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{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
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{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
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{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
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{ MP_ROM_QSTR(MP_QSTR_readlines), MP_ROM_PTR(&mp_stream_unbuffered_readlines_obj) },
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{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
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{ MP_ROM_QSTR(MP_QSTR_seek), MP_ROM_PTR(&mp_stream_seek_obj) },
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{ MP_ROM_QSTR(MP_QSTR_tell), MP_ROM_PTR(&mp_stream_tell_obj) },
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{ MP_ROM_QSTR(MP_QSTR_flush), MP_ROM_PTR(&mp_stream_flush_obj) },
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{ MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) },
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{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mp_stream_close_obj) },
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{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&mp_identity_obj) },
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{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&vfs_posix_file___exit___obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(vfs_posix_rawfile_locals_dict, vfs_posix_rawfile_locals_dict_table);
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STATIC const mp_stream_p_t vfs_posix_fileio_stream_p = {
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.read = vfs_posix_file_read,
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.write = vfs_posix_file_write,
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.ioctl = vfs_posix_file_ioctl,
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};
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MP_DEFINE_CONST_OBJ_TYPE(
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mp_type_vfs_posix_fileio,
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MP_QSTR_FileIO,
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MP_TYPE_FLAG_ITER_IS_STREAM,
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print, vfs_posix_file_print,
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protocol, &vfs_posix_fileio_stream_p,
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locals_dict, &vfs_posix_rawfile_locals_dict
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);
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STATIC const mp_stream_p_t vfs_posix_textio_stream_p = {
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.read = vfs_posix_file_read,
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.write = vfs_posix_file_write,
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.ioctl = vfs_posix_file_ioctl,
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.is_text = true,
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};
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MP_DEFINE_CONST_OBJ_TYPE(
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mp_type_vfs_posix_textio,
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MP_QSTR_TextIOWrapper,
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MP_TYPE_FLAG_ITER_IS_STREAM,
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print, vfs_posix_file_print,
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protocol, &vfs_posix_textio_stream_p,
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locals_dict, &vfs_posix_rawfile_locals_dict
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);
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const mp_obj_vfs_posix_file_t mp_sys_stdin_obj = {{&mp_type_vfs_posix_textio}, STDIN_FILENO};
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const mp_obj_vfs_posix_file_t mp_sys_stdout_obj = {{&mp_type_vfs_posix_textio}, STDOUT_FILENO};
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const mp_obj_vfs_posix_file_t mp_sys_stderr_obj = {{&mp_type_vfs_posix_textio}, STDERR_FILENO};
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#endif // MICROPY_VFS_POSIX
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