| 1 | #!/usr/bin/env python2
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| 2 | from __future__ import print_function
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| 3 |
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| 4 | import signal
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| 5 |
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| 6 | from typing import Dict, Tuple, List
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| 7 |
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| 8 | # POSIX 2018
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| 9 | # https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html
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| 10 |
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| 11 | _PORTABLE_SIGNALS = [
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| 12 | 'SIGABRT',
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| 13 | 'SIGALRM',
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| 14 | 'SIGBUS',
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| 15 | 'SIGCHLD',
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| 16 | 'SIGCONT',
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| 17 | 'SIGFPE',
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| 18 | 'SIGHUP',
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| 19 | 'SIGILL',
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| 20 | 'SIGINT',
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| 21 | 'SIGKILL',
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| 22 | 'SIGPIPE',
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| 23 | 'SIGQUIT',
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| 24 | 'SIGSEGV',
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| 25 | 'SIGSTOP',
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| 26 | 'SIGTERM',
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| 27 | 'SIGTSTP',
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| 28 | 'SIGTTIN',
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| 29 | 'SIGTTOU',
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| 30 | 'SIGUSR1',
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| 31 | 'SIGUSR2',
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| 32 | 'SIGSYS',
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| 33 | 'SIGTRAP',
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| 34 | 'SIGURG',
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| 35 | 'SIGVTALRM',
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| 36 | 'SIGXCPU',
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| 37 | 'SIGXFSZ',
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| 38 |
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| 39 | # Not part of POSIX, but essential for Oils to work
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| 40 | 'SIGWINCH',
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| 41 | ]
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| 42 |
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| 43 |
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| 44 | def _MakeSignals():
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| 45 | # type: () -> List[Tuple[str, int]]
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| 46 | """Piggy-back on CPython signal module.
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| 47 |
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| 48 | This causes portability problems
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| 49 | """
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| 50 | pairs = [] # type: List[Tuple[str, int]]
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| 51 | for name in _PORTABLE_SIGNALS:
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| 52 | int_val = getattr(signal, name)
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| 53 | assert name.startswith('SIG'), name
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| 54 | abbrev = name[3:]
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| 55 | pairs.append((abbrev, int_val))
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| 56 |
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| 57 | pairs.sort(key=lambda x: x[1])
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| 58 | return pairs
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| 59 |
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| 60 |
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| 61 | NO_SIGNAL = -1
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| 62 |
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| 63 | _SIGNAL_LIST = _MakeSignals()
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| 64 |
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| 65 | _SIGNAL_NAMES = {} # type: Dict[str, int]
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| 66 | for name, int_val in _SIGNAL_LIST:
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| 67 | _SIGNAL_NAMES[name] = int_val
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| 68 |
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| 69 | _SIGNAL_NUMBERS = {} # type: Dict[int, str]
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| 70 | for name, int_val in _SIGNAL_LIST:
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| 71 | _SIGNAL_NUMBERS[int_val] = name
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| 72 |
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| 73 | _MAX_SIG_NUMBER = max(int_val for _, int_val in _SIGNAL_LIST)
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| 74 |
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| 75 |
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| 76 | def MaxSigNumber():
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| 77 | # type: () -> int
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| 78 | """Iterate over xrange(n + 1)"""
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| 79 | return _MAX_SIG_NUMBER
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| 80 |
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| 81 |
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| 82 | def GetNumber(sig_spec):
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| 83 | # type: (str) -> int
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| 84 | return _SIGNAL_NAMES.get(sig_spec, NO_SIGNAL)
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| 85 |
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| 86 |
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| 87 | def GetName(sig_num):
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| 88 | # type: (int) -> str
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| 89 | s = _SIGNAL_NUMBERS.get(sig_num)
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| 90 | if s is None:
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| 91 | return None
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| 92 | return 'SIG' + s
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