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Extensions to examples/pty_test

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This commit is contained in:
Alan Carvalho de Assis 2016-07-16 11:24:54 -06:00 committed by Gregory Nutt
parent 552d3c4712
commit 49ab72d9ac
2 changed files with 314 additions and 32 deletions
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12
examples/pty_test/Kconfig
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@ -21,6 +21,10 @@ config EXAMPLES_PTYTEST_PROGNAME
This is the name of the program that will be use when the NSH ELF
program is installed.
config EXAMPLES_PTYTEST_SERIALDEV
string "Test serial device"
default"/dev/ttyS1"
config EXAMPLES_PTYTEST_PRIORITY
int "PTY_Test task priority"
default 100
@ -29,4 +33,12 @@ config EXAMPLES_PTYTEST_STACKSIZE
int "PTYTest stack size"
default 2048
config EXAMPLES_PTYTEST_DAEMONPRIO,
int "PTY_Test daemon task priority"
default 100
config EXAMPLES_PTYTEST_STACKSIZE
int "PTY_Test daemon stack size"
default 2048
endif

334
examples/pty_test/pty_test.c
View File

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