Extensions to examples/pty_test
This commit is contained in:
Alan Carvalho de Assis
Gregory Nutt
parent
552d3c4712
commit
49ab72d9ac
@ -21,6 +21,10 @@ config EXAMPLES_PTYTEST_PROGNAME
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This is the name of the program that will be use when the NSH ELF
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program is installed.
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config EXAMPLES_PTYTEST_SERIALDEV
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string "Test serial device"
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default"/dev/ttyS1"
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config EXAMPLES_PTYTEST_PRIORITY
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int "PTY_Test task priority"
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default 100
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@ -29,4 +33,12 @@ config EXAMPLES_PTYTEST_STACKSIZE
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int "PTYTest stack size"
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default 2048
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config EXAMPLES_PTYTEST_DAEMONPRIO,
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int "PTY_Test daemon task priority"
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default 100
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config EXAMPLES_PTYTEST_STACKSIZE
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int "PTY_Test daemon stack size"
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default 2048
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endif
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@ -1,7 +1,7 @@
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/****************************************************************************
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* examples/nxhello/nxhello_bkgd.c
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* examples/pty_test/pty_test.c
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*
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* Copyright (C) Gregory Nutt. All rights reserved.
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* Copyright (C) 2016, Gregory Nutt. All rights reserved.
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* Author: Alan Carvalho de Assisi <acassis@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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@ -37,16 +37,202 @@
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <poll.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <nuttx/serial/pty.h>
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#include "nshlib/nshlib.h"
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/****************************************************************************
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* pty_test_main
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef CONFIG_EXAMPLES_PTYTEST_SERIALDEV
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# define CONFIG_EXAMPLES_PTYTEST_SERIALDEV "/dev/ttyS1"
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#endif
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#ifndef CONFIG_EXAMPLES_PTYTEST_DAEMONPRIO
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# define CONFIG_EXAMPLES_PTYTEST_DAEMONPRIO SCHED_PRIORITY_DEFAULT
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#endif
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#ifndef CONFIG_EXAMPLES_PTYTEST_STACKSIZE
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# define CONFIG_EXAMPLES_PTYTEST_STACKSIZE 2048
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#endif
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#define POLL_TIMEOUT 200
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/****************************************************************************
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* Private Data
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****************************************************************************/
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struct term_pair_s
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{
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int fd_uart;
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int fd_pty;
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: serial_in
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*
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* Description:
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* Read data from serial and write to pts
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*
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****************************************************************************/
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static void serial_in(struct term_pair_s *tp)
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{
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struct pollfd fdp;
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char buffer[16];
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int ret;
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if (!tp)
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{
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fprintf(stderr, "ERROR: terminal pair struct is NULL!\n");
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return;
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}
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fdp.fd = tp->fd_uart;
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fdp.events = POLLIN;
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/* Run forever */
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for (;;)
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{
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ret = poll((struct pollfd *)&fdp, 1, POLL_TIMEOUT);
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if (ret > 0)
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{
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if ((fdp.revents & POLLIN) != 0)
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{
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int len;
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len = read(tp->fd_uart, buffer, 16);
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if (len < 0)
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{
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fprintf(stderr,
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"ERROR Failed to read from serial: %d\n",
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errno);
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}
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else if (len > 0)
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{
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ret = write(tp->fd_pty, buffer, len);
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if (ret < 0)
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{
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fprintf(stderr,
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"Failed to write to serial: %d\n",
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errno);
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}
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}
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}
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}
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/* Timeout */
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else if (ret == 0)
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{
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continue;
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}
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/* Poll error */
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else if (ret < 0)
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{
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fprintf(stderr, "ERROR: poll failed: %d\n", errno);
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continue;
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}
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}
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}
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/****************************************************************************
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* Name: serial_out
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*
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* Description:
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* Read data from pts and write to serial
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*
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****************************************************************************/
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static void serial_out(struct term_pair_s *tp)
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{
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struct pollfd fdp;
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char buffer[16];
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int ret;
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if (!tp)
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{
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fprintf(stderr, "Error: terminal pair struct is NULL!\n");
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return;
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}
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fdp.fd = tp->fd_pty;
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fdp.events = POLLIN;
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/* Run forever */
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for (;;)
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{
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ret = poll((struct pollfd *)&fdp, 1, POLL_TIMEOUT);
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if (ret > 0)
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{
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if (fdp.revents & POLLIN)
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{
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int len;
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len = read(tp->fd_pty, buffer, 16);
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if (len < 0)
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{
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fprintf(stderr,
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"ERROR: Failed to read from pseudo-terminal: %d\n",
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errno);
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}
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else if (len > 0)
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{
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ret = write(tp->fd_uart, buffer, len);
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if (ret < 0)
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{
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fprintf(stderr,
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"ERROR: Failed to write to serial: %d\n",
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errno);
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}
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}
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}
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}
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/* Timeout */
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else if (ret == 0)
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{
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continue;
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}
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/* poll error */
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else if (ret < 0)
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{
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fprintf(stderr, "ERROR: poll failed: %d\n", errno);
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continue;
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}
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}
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pty_test_main
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****************************************************************************/
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#ifdef CONFIG_BUILD_KERNEL
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@ -55,55 +241,139 @@ int main(int argc, FAR char *argv[])
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int pty_test_main(int argc, char *argv[])
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#endif
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{
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struct term_pair_s termpair;
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pthread_t si_thread;
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pthread_t so_thread;
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char buffer[16];
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pid_t pid;
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int fd_pts;
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int ret;
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int fd;
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/* Open the pseudo-terminal master multiplexor (pmtx) */
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printf("Create pseudo-terminal\n");
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fd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
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if (fd < 0)
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/* Open pseudo-terminal master (pts factory) */
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termpair.fd_pty = open("/dev/ptmx", O_RDWR | O_NOCTTY);
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if (termpair.fd_pty < 0)
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{
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fprintf(stderr, "ERROR: Failed to open /dev/ptmx: %d\n", errno);
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return -1;
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fprintf(stderr, "ERROR: Failed to opening /dev/ptmx: %d\n",
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errno);
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return EXIT_FAILURE;
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}
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/* Grant access and unlock the slave device */
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/* Grant access and unlock the slave PTY */
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ret = grantpt(fd);
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ret = grantpt(termpair.fd_pty);
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: grantpt() failed: %d\n", errno);
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close(fd);
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return -1;
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goto error_pts;
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}
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ret = unlockpt(fd);
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ret = unlockpt(termpair.fd_pty);
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: unlockpt() failed: %d\n", errno);
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close(fd);
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return -1;
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goto error_pts;
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}
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/* Get the slave device path */
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/* Get the create pts file-name */
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ptsname_r(fd, buffer, 16);
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printf("Slave device: %s\n", buffer);
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/* Loop forever, echoing anything received from the slave */
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for (; ; )
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ret = ptsname_r(termpair.fd_pty, buffer, 16);
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if (ret < 0)
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{
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ssize_t nread;
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char ch;
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nread = read(fd, &ch, 1);
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UNUSED(nread);
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putchar(ch);
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ch = '\0';
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fprintf(stderr, "ERROR: ptsname_r() failed: %d\n", errno);
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goto error_pts;
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}
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return 0;
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/* Open the created pts */
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fd_pts = open(buffer, O_RDWR | O_NONBLOCK);
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if (fd_pts < 0)
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{
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fprintf(stderr, "ERROR: Failed to open %s: %d\n", buffer, errno);
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goto error_pts;
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}
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/* Open the second serial port to create a new console there */
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termpair.fd_uart = open(CONFIG_EXAMPLES_PTYTEST_SERIALDEV,
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O_RDWR | O_NONBLOCK);
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if (termpair.fd_uart < 0)
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{
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fprintf(stderr, "Failed to open %s: %\n",
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CONFIG_EXAMPLES_PTYTEST_SERIALDEV, errno);
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goto error_serial;
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}
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printf("Starting a new NSH Session using %s\n", buffer);
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/* Close default stdin, stdout and stderr */
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close(0);
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close(1);
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close(2);
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/* Use this pts file as stdin, stdout, and stderr */
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(void)dup2(fd_pts, 0);
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(void)dup2(fd_pts, 1);
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(void)dup2(fd_pts, 2);
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/* Create a new console using this /dev/pts/N */
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pid = task_create("NSH Console", CONFIG_EXAMPLES_PTYTEST_DAEMONPRIO,
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CONFIG_EXAMPLES_PTYTEST_STACKSIZE, nsh_consolemain, NULL);
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if (pid < 0)
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{
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/* Can't do output because stdout and stderr are redirected */
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goto error_console;
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}
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/* Start a thread to read from serial */
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ret = pthread_create(&si_thread, NULL,
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(pthread_startroutine_t)serial_in,
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(pthread_addr_t)&termpair);
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if (ret != 0)
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{
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/* Can't do output because stdout and stderr are redirected */
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goto error_thread1;
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}
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/* Start a thread to write to serial */
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ret = pthread_create(&so_thread, NULL,
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(pthread_startroutine_t)serial_out,
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(pthread_addr_t)&termpair);
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if (ret != 0)
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{
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/* Can't do output because stdout and stderr are redirected */
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goto error_thread2;
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}
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/* Stay here to keep the threads running */
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for (;;)
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{
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/* Nothing to do, then sleep to avoid eating all cpu time */
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usleep(10000);
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}
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return EXIT_SUCCESS;
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error_thread2:
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error_thread1:
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error_console:
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close(termpair.fd_uart);
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error_serial:
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close(fd_pts);
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error_pts:
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close(termpair.fd_pty);
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return EXIT_FAILURE;
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}
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