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fd49e22670
The terminal CR -> NL mapping setting should be inherited in cbreak mode as OSes do not specify altering it as part of their stty cbreak mode definition.
74 lines
2.0 KiB
Python
74 lines
2.0 KiB
Python
"""Terminal utilities."""
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# Author: Steen Lumholt.
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from termios import *
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__all__ = ["cfmakeraw", "cfmakecbreak", "setraw", "setcbreak"]
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# Indices for termios list.
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IFLAG = 0
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OFLAG = 1
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CFLAG = 2
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LFLAG = 3
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ISPEED = 4
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OSPEED = 5
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CC = 6
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def cfmakeraw(mode):
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"""Make termios mode raw."""
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# Clear all POSIX.1-2017 input mode flags.
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# See chapter 11 "General Terminal Interface"
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# of POSIX.1-2017 Base Definitions.
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mode[IFLAG] &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP |
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INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF)
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# Do not post-process output.
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mode[OFLAG] &= ~OPOST
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# Disable parity generation and detection; clear character size mask;
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# let character size be 8 bits.
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mode[CFLAG] &= ~(PARENB | CSIZE)
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mode[CFLAG] |= CS8
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# Clear all POSIX.1-2017 local mode flags.
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mode[LFLAG] &= ~(ECHO | ECHOE | ECHOK | ECHONL | ICANON |
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IEXTEN | ISIG | NOFLSH | TOSTOP)
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# POSIX.1-2017, 11.1.7 Non-Canonical Mode Input Processing,
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# Case B: MIN>0, TIME=0
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# A pending read shall block until MIN (here 1) bytes are received,
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# or a signal is received.
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mode[CC] = list(mode[CC])
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mode[CC][VMIN] = 1
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mode[CC][VTIME] = 0
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def cfmakecbreak(mode):
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"""Make termios mode cbreak."""
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# Do not echo characters; disable canonical input.
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mode[LFLAG] &= ~(ECHO | ICANON)
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# POSIX.1-2017, 11.1.7 Non-Canonical Mode Input Processing,
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# Case B: MIN>0, TIME=0
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# A pending read shall block until MIN (here 1) bytes are received,
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# or a signal is received.
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mode[CC] = list(mode[CC])
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mode[CC][VMIN] = 1
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mode[CC][VTIME] = 0
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def setraw(fd, when=TCSAFLUSH):
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"""Put terminal into raw mode."""
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mode = tcgetattr(fd)
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new = list(mode)
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cfmakeraw(new)
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tcsetattr(fd, when, new)
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return mode
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def setcbreak(fd, when=TCSAFLUSH):
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"""Put terminal into cbreak mode."""
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mode = tcgetattr(fd)
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new = list(mode)
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cfmakecbreak(new)
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tcsetattr(fd, when, new)
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return mode
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