| 1 | #!/usr/bin/env python2
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| 2 | """process_test.py: Tests for process.py."""
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| 3 |
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| 4 | import os
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| 5 | import unittest
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| 6 |
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| 7 | from _devbuild.gen.id_kind_asdl import Id
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| 8 | from _devbuild.gen.runtime_asdl import (RedirValue, redirect_arg, cmd_value,
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| 9 | trace)
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| 10 | from _devbuild.gen.syntax_asdl import loc, redir_loc
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| 11 | from asdl import runtime
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| 12 | from builtin import read_osh
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| 13 | from builtin import trap_osh
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| 14 | from core import dev
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| 15 | from core import process # module under test
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| 16 | from core import pyos
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| 17 | from core import test_lib
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| 18 | from display import ui
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| 19 | from core import util
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| 20 | from mycpp.mylib import log
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| 21 | from core import state
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| 22 | from mycpp import mylib
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| 23 |
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| 24 | import posix_ as posix
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| 25 |
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| 26 | Process = process.Process
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| 27 | ExternalThunk = process.ExternalThunk
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| 28 |
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| 29 |
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| 30 | def Banner(msg):
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| 31 | print('-' * 60)
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| 32 | print(msg)
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| 33 |
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| 34 |
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| 35 | def _CommandNode(code_str, arena):
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| 36 | c_parser = test_lib.InitCommandParser(code_str, arena=arena)
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| 37 | return c_parser.ParseLogicalLine()
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| 38 |
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| 39 |
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| 40 | class FakeJobControl(object):
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| 41 |
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| 42 | def __init__(self, enabled):
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| 43 | self.enabled = enabled
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| 44 |
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| 45 | def Enabled(self):
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| 46 | return self.enabled
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| 47 |
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| 48 |
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| 49 | class ProcessTest(unittest.TestCase):
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| 50 |
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| 51 | def setUp(self):
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| 52 | self.arena = test_lib.MakeArena('process_test.py')
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| 53 |
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| 54 | mem = state.Mem('', [], self.arena, [])
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| 55 | parse_opts, exec_opts, mutable_opts = state.MakeOpts(mem, None)
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| 56 | mem.exec_opts = exec_opts
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| 57 |
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| 58 | state.InitMem(mem, {}, '0.1')
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| 59 |
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| 60 | self.job_control = process.JobControl()
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| 61 | self.job_list = process.JobList()
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| 62 |
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| 63 | signal_safe = pyos.InitSignalSafe()
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| 64 | self.trap_state = trap_osh.TrapState(signal_safe)
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| 65 |
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| 66 | fd_state = None
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| 67 | self.multi_trace = dev.MultiTracer(posix.getpid(), '', '', '',
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| 68 | fd_state)
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| 69 | self.tracer = dev.Tracer(None, exec_opts, mutable_opts, mem,
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| 70 | mylib.Stderr(), self.multi_trace)
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| 71 | self.waiter = process.Waiter(self.job_list, exec_opts, self.trap_state,
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| 72 | self.tracer)
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| 73 | errfmt = ui.ErrorFormatter()
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| 74 | self.fd_state = process.FdState(errfmt, self.job_control,
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| 75 | self.job_list, None, self.tracer, None,
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| 76 | exec_opts)
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| 77 | self.ext_prog = process.ExternalProgram('', self.fd_state, errfmt,
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| 78 | util.NullDebugFile())
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| 79 |
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| 80 | def _ExtProc(self, argv):
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| 81 | arg_vec = cmd_value.Argv(argv, [loc.Missing] * len(argv), False, None,
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| 82 | None)
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| 83 | argv0_path = None
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| 84 | for path_entry in ['/bin', '/usr/bin']:
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| 85 | full_path = os.path.join(path_entry, argv[0])
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| 86 | if os.path.exists(full_path):
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| 87 | argv0_path = full_path
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| 88 | break
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| 89 | if not argv0_path:
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| 90 | argv0_path = argv[0] # fallback that tests failure case
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| 91 | thunk = ExternalThunk(self.ext_prog, argv0_path, arg_vec, {})
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| 92 | return Process(thunk, self.job_control, self.job_list, self.tracer)
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| 93 |
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| 94 | def testStdinRedirect(self):
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| 95 | PATH = '_tmp/one-two.txt'
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| 96 | # Write two lines
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| 97 | with open(PATH, 'w') as f:
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| 98 | f.write('one\ntwo\n')
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| 99 |
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| 100 | # Should get the first line twice, because Pop() closes it!
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| 101 |
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| 102 | r = RedirValue(Id.Redir_Less, runtime.NO_SPID, redir_loc.Fd(0),
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| 103 | redirect_arg.Path(PATH))
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| 104 |
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| 105 | class CommandEvaluator(object):
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| 106 |
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| 107 | def RunPendingTraps(self):
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| 108 | pass
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| 109 |
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| 110 | cmd_ev = CommandEvaluator()
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| 111 |
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| 112 | err_out = []
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| 113 | self.fd_state.Push([r], err_out)
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| 114 | line1, _ = read_osh._ReadPortion(pyos.NEWLINE_CH, -1, cmd_ev)
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| 115 | self.fd_state.Pop(err_out)
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| 116 |
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| 117 | self.fd_state.Push([r], err_out)
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| 118 | line2, _ = read_osh._ReadPortion(pyos.NEWLINE_CH, -1, cmd_ev)
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| 119 | self.fd_state.Pop(err_out)
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| 120 |
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| 121 | # sys.stdin.readline() would erroneously return 'two' because of buffering.
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| 122 | self.assertEqual('one', line1)
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| 123 | self.assertEqual('one', line2)
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| 124 |
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| 125 | def testProcess(self):
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| 126 | # 3 fds. Does Python open it? Shell seems to have it too. Maybe it
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| 127 | # inherits from the shell.
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| 128 | print('FDS BEFORE', os.listdir('/dev/fd'))
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| 129 |
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| 130 | Banner('date')
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| 131 | argv = ['date']
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| 132 | p = self._ExtProc(argv)
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| 133 | why = trace.External(argv)
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| 134 | status = p.RunProcess(self.waiter, why)
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| 135 | log('date returned %d', status)
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| 136 | self.assertEqual(0, status)
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| 137 |
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| 138 | Banner('does-not-exist')
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| 139 | p = self._ExtProc(['does-not-exist'])
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| 140 | print(p.RunProcess(self.waiter, why))
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| 141 |
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| 142 | # 12 file descriptors open!
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| 143 | print('FDS AFTER', os.listdir('/dev/fd'))
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| 144 |
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| 145 | def testPipeline(self):
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| 146 | node = _CommandNode('uniq -c', self.arena)
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| 147 | cmd_ev = test_lib.InitCommandEvaluator(arena=self.arena,
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| 148 | ext_prog=self.ext_prog)
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| 149 | print('BEFORE', os.listdir('/dev/fd'))
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| 150 |
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| 151 | p = process.Pipeline(False, self.job_control, self.job_list,
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| 152 | self.tracer)
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| 153 | p.Add(self._ExtProc(['ls']))
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| 154 | p.Add(self._ExtProc(['cut', '-d', '.', '-f', '2']))
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| 155 | p.Add(self._ExtProc(['sort']))
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| 156 |
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| 157 | p.AddLast((cmd_ev, node))
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| 158 |
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| 159 | p.StartPipeline(self.waiter)
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| 160 | pipe_status = p.RunLastPart(self.waiter, self.fd_state)
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| 161 | log('pipe_status: %s', pipe_status)
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| 162 |
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| 163 | print('AFTER', os.listdir('/dev/fd'))
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| 164 |
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| 165 | def testPipeline2(self):
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| 166 | cmd_ev = test_lib.InitCommandEvaluator(arena=self.arena,
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| 167 | ext_prog=self.ext_prog)
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| 168 |
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| 169 | Banner('ls | cut -d . -f 1 | head')
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| 170 | p = process.Pipeline(False, self.job_control, self.job_list,
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| 171 | self.tracer)
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| 172 | p.Add(self._ExtProc(['ls']))
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| 173 | p.Add(self._ExtProc(['cut', '-d', '.', '-f', '1']))
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| 174 |
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| 175 | node = _CommandNode('head', self.arena)
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| 176 | p.AddLast((cmd_ev, node))
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| 177 |
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| 178 | p.StartPipeline(self.waiter)
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| 179 | print(p.RunLastPart(self.waiter, self.fd_state))
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| 180 |
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| 181 | # Simulating subshell for each command
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| 182 | node1 = _CommandNode('ls', self.arena)
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| 183 | node2 = _CommandNode('head', self.arena)
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| 184 | node3 = _CommandNode('sort --reverse', self.arena)
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| 185 |
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| 186 | thunk1 = process.SubProgramThunk(cmd_ev, node1, self.trap_state,
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| 187 | self.multi_trace, True, False)
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| 188 | thunk2 = process.SubProgramThunk(cmd_ev, node2, self.trap_state,
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| 189 | self.multi_trace, True, False)
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| 190 | thunk3 = process.SubProgramThunk(cmd_ev, node3, self.trap_state,
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| 191 | self.multi_trace, True, False)
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| 192 |
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| 193 | p = process.Pipeline(False, self.job_control, self.job_list,
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| 194 | self.tracer)
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| 195 | p.Add(Process(thunk1, self.job_control, self.job_list, self.tracer))
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| 196 | p.Add(Process(thunk2, self.job_control, self.job_list, self.tracer))
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| 197 | p.Add(Process(thunk3, self.job_control, self.job_list, self.tracer))
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| 198 |
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| 199 | last_thunk = (cmd_ev, _CommandNode('cat', self.arena))
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| 200 | p.AddLast(last_thunk)
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| 201 |
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| 202 | p.StartPipeline(self.waiter)
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| 203 | print(p.RunLastPart(self.waiter, self.fd_state))
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| 204 |
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| 205 | # TODO: Combine pipelines for other things:
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| 206 |
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| 207 | # echo foo 1>&2 | tee stdout.txt
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| 208 | #
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| 209 | # foo=$(ls | head)
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| 210 | #
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| 211 | # foo=$(<<EOF ls | head)
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| 212 | # stdin
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| 213 | # EOF
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| 214 | #
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| 215 | # ls | head &
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| 216 |
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| 217 | # Or technically we could fork the whole interpreter for foo|bar|baz and
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| 218 | # capture stdout of that interpreter.
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| 219 |
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| 220 | def makeTestPipeline(self, jc):
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| 221 | cmd_ev = test_lib.InitCommandEvaluator(arena=self.arena,
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| 222 | ext_prog=self.ext_prog)
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| 223 |
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| 224 | pi = process.Pipeline(False, jc, self.job_list, self.tracer)
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| 225 |
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| 226 | node1 = _CommandNode('/bin/echo testpipeline', self.arena)
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| 227 | node2 = _CommandNode('cat', self.arena)
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| 228 |
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| 229 | thunk1 = process.SubProgramThunk(cmd_ev, node1, self.trap_state,
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| 230 | self.multi_trace, True, False)
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| 231 | thunk2 = process.SubProgramThunk(cmd_ev, node2, self.trap_state,
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| 232 | self.multi_trace, True, False)
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| 233 |
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| 234 | pi.Add(Process(thunk1, jc, self.job_list, self.tracer))
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| 235 | pi.Add(Process(thunk2, jc, self.job_list, self.tracer))
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| 236 |
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| 237 | return pi
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| 238 |
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| 239 | def testPipelinePgidField(self):
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| 240 | jc = FakeJobControl(False)
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| 241 |
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| 242 | pi = self.makeTestPipeline(jc)
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| 243 | self.assertEqual(process.INVALID_PGID, pi.ProcessGroupId())
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| 244 |
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| 245 | pi.StartPipeline(self.waiter)
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| 246 | # No pgid
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| 247 | self.assertEqual(process.INVALID_PGID, pi.ProcessGroupId())
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| 248 |
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| 249 | jc = FakeJobControl(True)
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| 250 |
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| 251 | pi = self.makeTestPipeline(jc)
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| 252 | self.assertEqual(process.INVALID_PGID, pi.ProcessGroupId())
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| 253 |
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| 254 | pi.StartPipeline(self.waiter)
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| 255 | # first process is the process group leader
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| 256 | self.assertEqual(pi.pids[0], pi.ProcessGroupId())
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| 257 |
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| 258 | def testOpen(self):
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| 259 | # Disabled because mycpp translation can't handle it. We do this at a
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| 260 | # higher layer.
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| 261 | return
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| 262 |
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| 263 | # This function used to raise BOTH OSError and IOError because Python 2 is
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| 264 | # inconsistent.
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| 265 | # We follow Python 3 in preferring OSError.
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| 266 | # https://stackoverflow.com/questions/29347790/difference-between-ioerror-and-oserror
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| 267 | self.assertRaises(OSError, self.fd_state.Open, '_nonexistent_')
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| 268 | self.assertRaises(OSError, self.fd_state.Open, 'metrics/')
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| 269 |
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| 270 |
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| 271 | if __name__ == '__main__':
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| 272 | unittest.main()
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| 273 |
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| 274 | # vim: sw=4
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