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Linux Kernel
3.7.1
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All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
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Linux Kernel
3.7.1
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#include <linux/types.h>#include <linux/termios.h>#include <linux/errno.h>#include <linux/sched.h>#include <linux/kernel.h>#include <linux/major.h>#include <linux/tty.h>#include <linux/fcntl.h>#include <linux/string.h>#include <linux/mm.h>#include <linux/module.h>#include <linux/bitops.h>#include <linux/mutex.h>#include <linux/compat.h>#include <asm/io.h>#include <asm/uaccess.h>Go to the source code of this file.
Macros | |
| #define | TERMIOS_FLUSH 1 |
| #define | TERMIOS_WAIT 2 |
| #define | TERMIOS_TERMIO 4 |
| #define | TERMIOS_OLD 8 |
| #define | NOSET_MASK(x, y, z) (x = ((x) & ~(z)) | ((y) & (z))) |
| #define TERMIOS_FLUSH 1 |
Definition at line 34 of file tty_ioctl.c.
| #define TERMIOS_OLD 8 |
Definition at line 37 of file tty_ioctl.c.
| #define TERMIOS_TERMIO 4 |
Definition at line 36 of file tty_ioctl.c.
| #define TERMIOS_WAIT 2 |
Definition at line 35 of file tty_ioctl.c.
| EXPORT_SYMBOL | ( | tty_chars_in_buffer | ) |
| EXPORT_SYMBOL | ( | tty_write_room | ) |
| EXPORT_SYMBOL | ( | tty_driver_flush_buffer | ) |
| EXPORT_SYMBOL | ( | tty_throttle | ) |
| EXPORT_SYMBOL | ( | tty_unthrottle | ) |
| EXPORT_SYMBOL | ( | tty_wait_until_sent | ) |
| EXPORT_SYMBOL | ( | tty_termios_baud_rate | ) |
| EXPORT_SYMBOL | ( | tty_termios_input_baud_rate | ) |
| EXPORT_SYMBOL | ( | tty_get_baud_rate | ) |
| EXPORT_SYMBOL | ( | tty_termios_copy_hw | ) |
| EXPORT_SYMBOL | ( | tty_termios_hw_change | ) |
| EXPORT_SYMBOL | ( | n_tty_ioctl_helper | ) |
| EXPORT_SYMBOL_GPL | ( | tty_termios_encode_baud_rate | ) |
| EXPORT_SYMBOL_GPL | ( | tty_encode_baud_rate | ) |
| EXPORT_SYMBOL_GPL | ( | tty_set_termios | ) |
| EXPORT_SYMBOL_GPL | ( | tty_mode_ioctl | ) |
| EXPORT_SYMBOL_GPL | ( | tty_perform_flush | ) |
| int n_tty_ioctl_helper | ( | struct tty_struct * | tty, |
| struct file * | file, | ||
| unsigned int | cmd, | ||
| unsigned long | arg | ||
| ) |
Definition at line 1118 of file tty_ioctl.c.
| int tty_chars_in_buffer | ( | struct tty_struct * | tty | ) |
tty_chars_in_buffer - characters pending : terminal
Return the number of bytes of data in the device private output queue. If no private method is supplied there is assumed to be no queue on the device.
Definition at line 49 of file tty_ioctl.c.
| void tty_driver_flush_buffer | ( | struct tty_struct * | tty | ) |
tty_driver_flush_buffer - discard internal buffer : terminal
Discard the internal output buffer for this device. If no method is provided then either the buffer cannot be hardware flushed or there is no buffer driver side.
Definition at line 85 of file tty_ioctl.c.
| void tty_encode_baud_rate | ( | struct tty_struct * | tty, |
| speed_t | ibaud, | ||
| speed_t | obaud | ||
| ) |
| speed_t tty_get_baud_rate | ( | struct tty_struct * | tty | ) |
| int tty_mode_ioctl | ( | struct tty_struct * | tty, |
| struct file * | file, | ||
| unsigned int | cmd, | ||
| unsigned long | arg | ||
| ) |
Definition at line 946 of file tty_ioctl.c.
| int tty_perform_flush | ( | struct tty_struct * | tty, |
| unsigned long | arg | ||
| ) |
Definition at line 1089 of file tty_ioctl.c.
| int tty_set_termios | ( | struct tty_struct * | tty, |
| struct ktermios * | new_termios | ||
| ) |
tty_set_termios - update termios values : tty to update : desired new value
Perform updates to the termios values set on this terminal. There is a bit of layering violation here with n_tty in terms of the internal knowledge of this function.
Locking: termios_mutex
Definition at line 498 of file tty_ioctl.c.
tty_termios_baud_rate : termios structure
Convert termios baud rate data into a speed. This should be called with the termios lock held if this termios is a terminal termios structure. May change the termios data. Device drivers can call this function but should use ->c_[io]speed directly as they are updated.
Locking: none
Definition at line 241 of file tty_ioctl.c.
tty_termios_copy_hw - copy hardware settings : New termios : Old termios
Propagate the hardware specific terminal setting bits from the old termios structure to the new one. This is used in cases where the hardware does not support reconfiguration or as a helper in some cases where only minimal reconfiguration is supported
Definition at line 456 of file tty_ioctl.c.
tty_termios_encode_baud_rate : ktermios structure holding user requested state : input speed : output speed
Encode the speeds set into the passed termios structure. This is used as a library helper for drivers so that they can report back the actual speed selected when it differs from the speed requested
For maximal back compatibility with legacy SYS5/POSIX *nix behaviour we need to carefully set the bits when the user does not get the desired speed. We allow small margins and preserve as much of possible of the input intent to keep compatibility.
Locking: Caller should hold termios lock. This is already held when calling this function from the driver termios handler.
The ifdefs deal with platforms whose owners have yet to update them and will all go away once this is done.
Definition at line 325 of file tty_ioctl.c.
tty_termios_hw_change - check for setting change : termios : termios to compare
Check if any of the bits that affect a dumb device have changed between the two termios structures, or a speed change is needed.
Definition at line 476 of file tty_ioctl.c.
tty_termios_input_baud_rate : termios structure
Convert termios baud rate data into a speed. This should be called with the termios lock held if this termios is a terminal termios structure. May change the termios data. Device drivers can call this function but should use ->c_[io]speed directly as they are updated.
Locking: none
Definition at line 276 of file tty_ioctl.c.
| void tty_throttle | ( | struct tty_struct * | tty | ) |
tty_throttle - flow control : terminal
Indicate that a tty should stop transmitting data down the stack. Takes the termios mutex to protect against parallel throttle/unthrottle and also to ensure the driver can consistently reference its own termios data at this point when implementing software flow control.
Definition at line 102 of file tty_ioctl.c.
| void tty_unthrottle | ( | struct tty_struct * | tty | ) |
tty_unthrottle - flow control : terminal
Indicate that a tty may continue transmitting data down the stack. Takes the termios mutex to protect against parallel throttle/unthrottle and also to ensure the driver can consistently reference its own termios data at this point when implementing software flow control.
Drivers should however remember that the stack can issue a throttle, then change flow control method, then unthrottle.
Definition at line 126 of file tty_ioctl.c.
| void tty_wait_until_sent | ( | struct tty_struct * | tty, |
| long | timeout | ||
| ) |
tty_wait_until_sent - wait for I/O to finish : tty we are waiting for : how long we will wait
Wait for characters pending in a tty driver to hit the wire, or for a timeout to occur (eg due to flow control)
Locking: none
Definition at line 147 of file tty_ioctl.c.
| int tty_write_room | ( | struct tty_struct * | tty | ) |
tty_write_room - write queue space : terminal
Return the number of bytes that can be queued to this device at the present time. The result should be treated as a guarantee and the driver cannot offer a value it later shrinks by more than the number of bytes written. If no method is provided 2K is always returned and data may be lost as there will be no flow control.
Definition at line 69 of file tty_ioctl.c.
1.8.2