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