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Add tcsetattr and tcgetattr

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4355 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2012-02-01 16:17:12 +00:00
parent 66d9fc6bca
commit dac988656d
1 changed files with 42 additions and 5 deletions
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47
netutils/telnetd/telnetd_driver.c
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@ -72,6 +72,7 @@
/**************************************************************************** /****************************************************************************
* Pre-processor Definitions * Pre-processor Definitions
****************************************************************************/ ****************************************************************************/
/* Telnet protocol stuff ****************************************************/
#define ISO_nl 0x0a #define ISO_nl 0x0a
#define ISO_cr 0x0d #define ISO_cr 0x0d
@ -82,6 +83,10 @@
#define TELNET_DO 253 #define TELNET_DO 253
#define TELNET_DONT 254 #define TELNET_DONT 254
/* Device stuff *************************************************************/
#define TELNETD_DEVFMT "/dev/telnetd%d"
/**************************************************************************** /****************************************************************************
* Private Types * Private Types
****************************************************************************/ ****************************************************************************/
@ -106,6 +111,7 @@ struct telnetd_dev_s
uint8_t td_pending; /* Number of valid, pending bytes in the rxbuffer */ uint8_t td_pending; /* Number of valid, pending bytes in the rxbuffer */
uint8_t td_offset; /* Offset to the valid, pending bytes in the rxbuffer */ uint8_t td_offset; /* Offset to the valid, pending bytes in the rxbuffer */
uint8_t td_crefs; /* The number of open references to the session */ uint8_t td_crefs; /* The number of open references to the session */
int td_minor; /* Minor device number */
FAR struct socket td_psock; /* A clone of the internal socket structure */ FAR struct socket td_psock; /* A clone of the internal socket structure */
char td_rxbuffer[CONFIG_TELNETD_RXBUFFER_SIZE]; char td_rxbuffer[CONFIG_TELNETD_RXBUFFER_SIZE];
char td_txbuffer[CONFIG_TELNETD_TXBUFFER_SIZE]; char td_txbuffer[CONFIG_TELNETD_TXBUFFER_SIZE];
@ -460,6 +466,7 @@ static int telnetd_close(FAR struct file *filep)
{ {
FAR struct inode *inode = filep->f_inode; FAR struct inode *inode = filep->f_inode;
FAR struct telnetd_dev_s *priv = inode->i_private; FAR struct telnetd_dev_s *priv = inode->i_private;
FAR char *devpath;
int ret; int ret;
nllvdbg("td_crefs: %d\n", priv->td_crefs); nllvdbg("td_crefs: %d\n", priv->td_crefs);
@ -479,15 +486,46 @@ static int telnetd_close(FAR struct file *filep)
if (priv->td_crefs > 1) if (priv->td_crefs > 1)
{ {
/* Just decrement the reference count and release the semaphore */
priv->td_crefs--; priv->td_crefs--;
sem_post(&priv->td_exclsem); sem_post(&priv->td_exclsem);
} }
else else
{ {
/* Re-create the path to the driver. */
sched_lock();
ret = asprintf(&devpath, TELNETD_DEVFMT, priv->td_minor);
if (ret < 0)
{
nlldbg("Failed to allocate the driver path\n");
}
else
{
/* Unregister the character driver */
ret = unregister_driver(devpath);
if (ret < 0)
{
nlldbg("Failed to unregister the driver %s: %d\n", ret);
}
free(devpath);
}
/* Close the socket */
psock_close(&priv->td_psock); psock_close(&priv->td_psock);
sem_post(&priv->td_exclsem);
/* Release the driver memory. What if there are threads
* waiting on td_exclsem? They will never be awakened!
*/
DEBUGASSERT(priv->td_exclsem.semcount == 0);
sem_destroy(&priv->td_exclsem); sem_destroy(&priv->td_exclsem);
free(priv); free(priv);
sched_unlock();
} }
ret = OK; ret = OK;
@ -682,7 +720,6 @@ FAR char *telnetd_driver(int sd, FAR struct telnetd_s *daemon)
FAR struct telnetd_dev_s *priv; FAR struct telnetd_dev_s *priv;
FAR struct socket *psock; FAR struct socket *psock;
FAR char *devpath = NULL; FAR char *devpath = NULL;
int minor;
int ret; int ret;
/* Allocate instance data for this driver */ /* Allocate instance data for this driver */
@ -736,13 +773,13 @@ FAR char *telnetd_driver(int sd, FAR struct telnetd_s *daemon)
} }
while (ret < 0); while (ret < 0);
minor = g_telnetdcommon.minor; priv->td_minor = g_telnetdcommon.minor;
g_telnetdcommon.minor++; g_telnetdcommon.minor++;
sem_post(&g_telnetdcommon.exclsem); sem_post(&g_telnetdcommon.exclsem);
/* Create a path and name for the driver. */ /* Create a path and name for the driver. */
ret = asprintf(&devpath, "/dev/telnetd%d", minor); ret = asprintf(&devpath, TELNETD_DEVFMT, priv->td_minor);
if (ret < 0) if (ret < 0)
{ {
nlldbg("Failed to allocate the driver path\n"); nlldbg("Failed to allocate the driver path\n");
@ -754,7 +791,7 @@ FAR char *telnetd_driver(int sd, FAR struct telnetd_s *daemon)
ret = register_driver(devpath, &g_telnetdfops, 0666, priv); ret = register_driver(devpath, &g_telnetdfops, 0666, priv);
if (ret < 0) if (ret < 0)
{ {
nlldbg("Failed to register the driver %s: %d\n", ret); nlldbg("Failed to register the driver %s: %d\n", devpath, ret);
goto errout_with_devpath; goto errout_with_devpath;
} }