version 1.151, 2021/01/17 16:17:41 |
version 1.152, 2021/02/11 08:28:45 |
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proc_send(client_peer, MSG_IDENTIFY_DONE, -1, NULL, 0); |
proc_send(client_peer, MSG_IDENTIFY_DONE, -1, NULL, 0); |
} |
} |
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/* File write error callback. */ |
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static void |
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client_write_error_callback(__unused struct bufferevent *bev, |
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__unused short what, void *arg) |
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{ |
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struct client_file *cf = arg; |
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log_debug("write error file %d", cf->stream); |
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bufferevent_free(cf->event); |
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cf->event = NULL; |
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close(cf->fd); |
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cf->fd = -1; |
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if (client_exitflag) |
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client_exit(); |
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} |
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/* File write callback. */ |
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static void |
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client_write_callback(__unused struct bufferevent *bev, void *arg) |
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{ |
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struct client_file *cf = arg; |
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if (cf->closed && EVBUFFER_LENGTH(cf->event->output) == 0) { |
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bufferevent_free(cf->event); |
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close(cf->fd); |
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RB_REMOVE(client_files, &client_files, cf); |
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file_free(cf); |
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} |
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if (client_exitflag) |
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client_exit(); |
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} |
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/* Open write file. */ |
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static void |
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client_write_open(void *data, size_t datalen) |
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{ |
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struct msg_write_open *msg = data; |
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const char *path; |
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struct msg_write_ready reply; |
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struct client_file find, *cf; |
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const int flags = O_NONBLOCK|O_WRONLY|O_CREAT; |
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int error = 0; |
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if (datalen < sizeof *msg) |
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fatalx("bad MSG_WRITE_OPEN size"); |
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if (datalen == sizeof *msg) |
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path = "-"; |
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else |
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path = (const char *)(msg + 1); |
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log_debug("open write file %d %s", msg->stream, path); |
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find.stream = msg->stream; |
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if ((cf = RB_FIND(client_files, &client_files, &find)) == NULL) { |
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cf = file_create(NULL, msg->stream, NULL, NULL); |
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RB_INSERT(client_files, &client_files, cf); |
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} else { |
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error = EBADF; |
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goto reply; |
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} |
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if (cf->closed) { |
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error = EBADF; |
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goto reply; |
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} |
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cf->fd = -1; |
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if (msg->fd == -1) |
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cf->fd = open(path, msg->flags|flags, 0644); |
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else { |
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if (msg->fd != STDOUT_FILENO && msg->fd != STDERR_FILENO) |
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errno = EBADF; |
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else { |
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cf->fd = dup(msg->fd); |
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if (~client_flags & CLIENT_CONTROL) |
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close(msg->fd); /* can only be used once */ |
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} |
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} |
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if (cf->fd == -1) { |
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error = errno; |
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goto reply; |
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} |
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cf->event = bufferevent_new(cf->fd, NULL, client_write_callback, |
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client_write_error_callback, cf); |
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bufferevent_enable(cf->event, EV_WRITE); |
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goto reply; |
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reply: |
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reply.stream = msg->stream; |
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reply.error = error; |
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proc_send(client_peer, MSG_WRITE_READY, -1, &reply, sizeof reply); |
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} |
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/* Write to client file. */ |
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static void |
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client_write_data(void *data, size_t datalen) |
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{ |
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struct msg_write_data *msg = data; |
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struct client_file find, *cf; |
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size_t size = datalen - sizeof *msg; |
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if (datalen < sizeof *msg) |
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fatalx("bad MSG_WRITE size"); |
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find.stream = msg->stream; |
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if ((cf = RB_FIND(client_files, &client_files, &find)) == NULL) |
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fatalx("unknown stream number"); |
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log_debug("write %zu to file %d", size, cf->stream); |
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if (cf->event != NULL) |
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bufferevent_write(cf->event, msg + 1, size); |
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} |
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/* Close client file. */ |
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static void |
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client_write_close(void *data, size_t datalen) |
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{ |
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struct msg_write_close *msg = data; |
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struct client_file find, *cf; |
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if (datalen != sizeof *msg) |
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fatalx("bad MSG_WRITE_CLOSE size"); |
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find.stream = msg->stream; |
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if ((cf = RB_FIND(client_files, &client_files, &find)) == NULL) |
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fatalx("unknown stream number"); |
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log_debug("close file %d", cf->stream); |
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if (cf->event == NULL || EVBUFFER_LENGTH(cf->event->output) == 0) { |
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if (cf->event != NULL) |
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bufferevent_free(cf->event); |
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if (cf->fd != -1) |
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close(cf->fd); |
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RB_REMOVE(client_files, &client_files, cf); |
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file_free(cf); |
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} |
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} |
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/* File read callback. */ |
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static void |
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client_read_callback(__unused struct bufferevent *bev, void *arg) |
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{ |
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struct client_file *cf = arg; |
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void *bdata; |
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size_t bsize; |
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struct msg_read_data *msg; |
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size_t msglen; |
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msg = xmalloc(sizeof *msg); |
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for (;;) { |
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bdata = EVBUFFER_DATA(cf->event->input); |
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bsize = EVBUFFER_LENGTH(cf->event->input); |
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if (bsize == 0) |
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break; |
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if (bsize > MAX_IMSGSIZE - IMSG_HEADER_SIZE - sizeof *msg) |
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bsize = MAX_IMSGSIZE - IMSG_HEADER_SIZE - sizeof *msg; |
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log_debug("read %zu from file %d", bsize, cf->stream); |
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msglen = (sizeof *msg) + bsize; |
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msg = xrealloc(msg, msglen); |
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msg->stream = cf->stream; |
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memcpy(msg + 1, bdata, bsize); |
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proc_send(client_peer, MSG_READ, -1, msg, msglen); |
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evbuffer_drain(cf->event->input, bsize); |
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} |
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free(msg); |
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} |
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/* File read error callback. */ |
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static void |
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client_read_error_callback(__unused struct bufferevent *bev, |
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__unused short what, void *arg) |
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{ |
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struct client_file *cf = arg; |
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struct msg_read_done msg; |
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log_debug("read error file %d", cf->stream); |
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msg.stream = cf->stream; |
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msg.error = 0; |
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proc_send(client_peer, MSG_READ_DONE, -1, &msg, sizeof msg); |
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bufferevent_free(cf->event); |
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close(cf->fd); |
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RB_REMOVE(client_files, &client_files, cf); |
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file_free(cf); |
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} |
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/* Open read file. */ |
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static void |
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client_read_open(void *data, size_t datalen) |
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{ |
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struct msg_read_open *msg = data; |
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const char *path; |
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struct msg_read_done reply; |
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struct client_file find, *cf; |
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const int flags = O_NONBLOCK|O_RDONLY; |
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int error; |
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if (datalen < sizeof *msg) |
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fatalx("bad MSG_READ_OPEN size"); |
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if (datalen == sizeof *msg) |
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path = "-"; |
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else |
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path = (const char *)(msg + 1); |
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log_debug("open read file %d %s", msg->stream, path); |
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find.stream = msg->stream; |
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if ((cf = RB_FIND(client_files, &client_files, &find)) == NULL) { |
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cf = file_create(NULL, msg->stream, NULL, NULL); |
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RB_INSERT(client_files, &client_files, cf); |
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} else { |
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error = EBADF; |
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goto reply; |
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} |
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if (cf->closed) { |
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error = EBADF; |
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goto reply; |
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} |
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cf->fd = -1; |
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if (msg->fd == -1) |
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cf->fd = open(path, flags); |
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else { |
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if (msg->fd != STDIN_FILENO) |
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errno = EBADF; |
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else { |
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cf->fd = dup(msg->fd); |
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if (~client_flags & CLIENT_CONTROL) |
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close(msg->fd); /* can only be used once */ |
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} |
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} |
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if (cf->fd == -1) { |
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error = errno; |
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goto reply; |
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} |
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cf->event = bufferevent_new(cf->fd, client_read_callback, NULL, |
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client_read_error_callback, cf); |
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bufferevent_enable(cf->event, EV_READ); |
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return; |
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reply: |
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reply.stream = msg->stream; |
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reply.error = error; |
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proc_send(client_peer, MSG_READ_DONE, -1, &reply, sizeof reply); |
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} |
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/* Run command in shell; used for -c. */ |
/* Run command in shell; used for -c. */ |
static __dead void |
static __dead void |
client_exec(const char *shell, const char *shellcmd) |
client_exec(const char *shell, const char *shellcmd) |
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} |
} |
} |
} |
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/* Callback for file write error or close. */ |
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static void |
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client_file_check_cb(__unused struct client *c, __unused const char *path, |
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__unused int error, __unused int closed, __unused struct evbuffer *buffer, |
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__unused void *data) |
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{ |
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if (client_exitflag) |
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client_exit(); |
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} |
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/* Callback for client read events. */ |
/* Callback for client read events. */ |
static void |
static void |
client_dispatch(struct imsg *imsg, __unused void *arg) |
client_dispatch(struct imsg *imsg, __unused void *arg) |
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proc_exit(client_proc); |
proc_exit(client_proc); |
break; |
break; |
case MSG_READ_OPEN: |
case MSG_READ_OPEN: |
client_read_open(data, datalen); |
file_read_open(&client_files, client_peer, imsg, 1, |
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!(client_flags & CLIENT_CONTROL), client_file_check_cb, |
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NULL); |
break; |
break; |
case MSG_WRITE_OPEN: |
case MSG_WRITE_OPEN: |
client_write_open(data, datalen); |
file_write_open(&client_files, client_peer, imsg, 1, |
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!(client_flags & CLIENT_CONTROL), client_file_check_cb, |
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NULL); |
break; |
break; |
case MSG_WRITE: |
case MSG_WRITE: |
client_write_data(data, datalen); |
file_write_data(&client_files, imsg); |
break; |
break; |
case MSG_WRITE_CLOSE: |
case MSG_WRITE_CLOSE: |
client_write_close(data, datalen); |
file_write_close(&client_files, imsg); |
break; |
break; |
case MSG_OLDSTDERR: |
case MSG_OLDSTDERR: |
case MSG_OLDSTDIN: |
case MSG_OLDSTDIN: |