5  * SPDX-License-Identifier: Apache-2.0
9 /* Note: This is used only for interaction with the host C library, and is therefore exempt of
37  * @retval -1 If no character was available to read
38  * @retval -2 if the stdin is disconnected
47 		return -2;  in np_uart_stdin_poll_in_bottom()
50 	int n = -1;  in np_uart_stdin_poll_in_bottom()
62 		return -1;  in np_uart_stdin_poll_in_bottom()
63 	} else if (ready == -1) {  in np_uart_stdin_poll_in_bottom()
68 	if ((n == -1) || (n == 0)) {  in np_uart_stdin_poll_in_bottom()
69 		return -1;  in np_uart_stdin_poll_in_bottom()
76  * @brief Check if the output descriptor has something connected to the slave side
81  * @retval 1 Something connected to the slave side
89 	if (ret == -1) {  in np_uart_slave_connected()
103 		/* There is now a reader on the slave side */  in np_uart_slave_connected()
110  * Attempt to connect a terminal emulator to the slave side of the pty
111  * If -attach_uart_cmd=<cmd> is provided as a command line option, <cmd> will be
133  * emulator to its slave side.
146 	if (master_pty == -1) {  in np_uart_open_ptty()
150 	if (ret == -1) {  in np_uart_open_ptty()
153 		ERROR("Could not grant access to the slave PTY side (%i)\n",  in np_uart_open_ptty()
157 	if (ret == -1) {  in np_uart_open_ptty()
160 		ERROR("Could not unlock the slave PTY side (%i)\n", err_nbr);  in np_uart_open_ptty()
166 		ERROR("Error getting slave PTY device name (%i)\n", err_nbr);  in np_uart_open_ptty()
170 	if (flags == -1) {  in np_uart_open_ptty()
178 	if (ret == -1) {  in np_uart_open_ptty()
181 		ERROR("Could not set the master PTY as non-blocking (%i)\n",  in np_uart_open_ptty()
196 	if (ret == -1) {  in np_uart_open_ptty()
206 	if (ret == -1) {  in np_uart_open_ptty()
221 		if (ret == -1) {  in np_uart_open_ptty()
223 			ERROR("%s: Could not open terminal from the slave side (%i,%s)\n",  in np_uart_open_ptty()
227 		if (ret == -1) {  in np_uart_open_ptty()
229 			ERROR("%s: Could not close terminal from the slave side (%i,%s)\n",  in np_uart_open_ptty()