def testPipeline2(self):
Banner('ls | cut -d . -f 1 | head')
p = process.Pipeline()
p.Add(_ExtProc(['ls']))
p.Add(_ExtProc(['cut', '-d', '.', '-f', '1']))
p.Add(_ExtProc(['head']))
print(p.Run(_WAITER))
ex = InitExecutor()
# Simulating subshell for each command
w1 = ast.CompoundWord()
w1.parts.append(ast.LiteralPart(ast.token(Id.Lit_Chars, 'ls')))
node1 = ast.SimpleCommand()
node1.words = [w1]
w2 = ast.CompoundWord()
w2.parts.append(ast.LiteralPart(ast.token(Id.Lit_Chars, 'head')))
node2 = ast.SimpleCommand()
node2.words = [w2]
w3 = ast.CompoundWord()
w3.parts.append(ast.LiteralPart(ast.token(Id.Lit_Chars, 'sort')))
w4 = ast.CompoundWord()
w4.parts.append(ast.LiteralPart(ast.token(Id.Lit_Chars, '--reverse')))
node3 = ast.SimpleCommand()
node3.words = [w3, w4]
p = process.Pipeline()
p.Add(Process(process.SubProgramThunk(ex, node1)))
p.Add(Process(process.SubProgramThunk(ex, node2)))
p.Add(Process(process.SubProgramThunk(ex, node3)))
print(p.Run(_WAITER))
def testPipeline2(self):
arena = test_lib.MakeArena('testPipeline')
ex = test_lib.InitExecutor(arena=arena)
Banner('ls | cut -d . -f 1 | head')
p = process.Pipeline()
p.Add(_ExtProc(['ls']))
p.Add(_ExtProc(['cut', '-d', '.', '-f', '1']))
node = _CommandNode('head', arena)
p.AddLast((ex, node))
fd_state = process.FdState()
print(p.Run(_WAITER, _FD_STATE))
# Simulating subshell for each command
node1 = _CommandNode('ls', arena)
node2 = _CommandNode('head', arena)
node3 = _CommandNode('sort --reverse', arena)
p = process.Pipeline()
p.Add(Process(process.SubProgramThunk(ex, node1)))
p.Add(Process(process.SubProgramThunk(ex, node2)))
p.Add(Process(process.SubProgramThunk(ex, node3)))
last_thunk = (ex, _CommandNode('cat', arena))
p.AddLast(last_thunk)
print(p.Run(_WAITER, _FD_STATE))
def testPipeline2(self):
cmd_ev = test_lib.InitCommandEvaluator(arena=self.arena,
ext_prog=self.ext_prog)
Banner('ls | cut -d . -f 1 | head')
p = process.Pipeline()
p.Add(self._ExtProc(['ls']))
p.Add(self._ExtProc(['cut', '-d', '.', '-f', '1']))
node = _CommandNode('head', self.arena)
p.AddLast((cmd_ev, node))
print(p.Run(self.waiter, self.fd_state))
# Simulating subshell for each command
node1 = _CommandNode('ls', self.arena)
node2 = _CommandNode('head', self.arena)
node3 = _CommandNode('sort --reverse', self.arena)
p = process.Pipeline()
p.Add(
Process(process.SubProgramThunk(cmd_ev, node1), self.job_state,
self.tracer))
p.Add(
Process(process.SubProgramThunk(cmd_ev, node2), self.job_state,
self.tracer))
p.Add(
Process(process.SubProgramThunk(cmd_ev, node3), self.job_state,
self.tracer))
last_thunk = (cmd_ev, _CommandNode('cat', self.arena))
p.AddLast(last_thunk)
print(p.Run(self.waiter, self.fd_state))
def testPipeline2(self):
cmd_ev = test_lib.InitCommandEvaluator(arena=_ARENA, ext_prog=_EXT_PROG)
Banner('ls | cut -d . -f 1 | head')
p = process.Pipeline()
p.Add(_ExtProc(['ls']))
p.Add(_ExtProc(['cut', '-d', '.', '-f', '1']))
node = _CommandNode('head', _ARENA)
p.AddLast((cmd_ev, node))
fd_state = process.FdState(_ERRFMT, _JOB_STATE)
print(p.Run(_WAITER, _FD_STATE))
# Simulating subshell for each command
node1 = _CommandNode('ls', _ARENA)
node2 = _CommandNode('head', _ARENA)
node3 = _CommandNode('sort --reverse', _ARENA)
p = process.Pipeline()
p.Add(Process(process.SubProgramThunk(cmd_ev, node1), _JOB_STATE))
p.Add(Process(process.SubProgramThunk(cmd_ev, node2), _JOB_STATE))
p.Add(Process(process.SubProgramThunk(cmd_ev, node3), _JOB_STATE))
last_thunk = (cmd_ev, _CommandNode('cat', _ARENA))
p.AddLast(last_thunk)
print(p.Run(_WAITER, _FD_STATE))
def _RunPipeline(self, node):
# TODO: Also check for "echo" and "read". Turn them into HereDocRedirect()
# and p.CaptureOutput()
# NOTE: First or last one can use the "main" shell thread. Doesn't have to
# run in subshell. Although I guess it's simpler if it always does.
pi = process.Pipeline()
for child in node.children:
p = self._GetProcessForNode(child)
pi.Add(p)
#print(pi)
# TODO: Set PipeStatus() in self.mem
pipe_status = pi.Run()
#log('pipe_status %s', pipe_status)
if self.exec_opts.pipefail:
# If any process failed, the status of the entire pipeline is 1.
status = 0
for st in pipe_status:
if st != 0:
status = 1
else:
status = pipe_status[-1] # last one determines status
if node.negated:
if status == 0:
return 1
else:
return 0
return status
def _RunPipeline(self, node):
pi = process.Pipeline()
# First n-1 processes (which is empty when n == 1)
n = len(node.children)
for i in xrange(n - 1):
p = self._MakeProcess(node.children[i])
pi.Add(p)
# Last piece of code is in THIS PROCESS. 'echo foo | read line; echo $line'
pi.AddLast((self, node.children[n-1]))
pipe_status = pi.Run(self.waiter, self.fd_state)
state.SetGlobalArray(self.mem, 'PIPESTATUS', [str(p) for p in pipe_status])
if self.exec_opts.pipefail:
# The status is that of the last command that is non-zero.
status = 0
for st in pipe_status:
if st != 0:
status = st
else:
status = pipe_status[-1] # status of last one is pipeline status
return status
def RunPipeline(self, node):
# type: (command__Pipeline) -> int
pi = process.Pipeline()
# First n-1 processes (which is empty when n == 1)
n = len(node.children)
for i in xrange(n - 1):
p = self._MakeProcess(node.children[i], parent_pipeline=pi)
pi.Add(p)
# Last piece of code is in THIS PROCESS. 'echo foo | read line; echo $line'
pi.AddLast((self.cmd_ev, node.children[n - 1]))
pipe_status = pi.Run(self.waiter, self.fd_state)
self.mem.SetPipeStatus(pipe_status)
if self.exec_opts.pipefail():
# The status is that of the last command that is non-zero.
status = 0
for st in pipe_status:
if st != 0:
status = st
else:
status = pipe_status[-1] # status of last one is pipeline status
return status
def _RunJobInBackground(self, node):
# Special case for pipeline. There is some evidence here:
# https://www.gnu.org/software/libc/manual/html_node/Launching-Jobs.html#Launching-Jobs
#
# "You can either make all the processes in the process group be children
# of the shell process, or you can make one process in group be the
# ancestor of all the other processes in that group. The sample shell
# program presented in this chapter uses the first approach because it
# makes bookkeeping somewhat simpler."
if node.tag == command_e.Pipeline:
pi = process.Pipeline()
for child in node.children:
pi.Add(self._MakeProcess(child, job_state=self.job_state))
job_id = pi.StartInBackground(self.waiter, self.job_state)
self.mem.last_job_id = job_id # for $!
self.job_state.Register(job_id, pi)
log('Started background pipeline with job ID %d', job_id)
else:
# Problem: to get the 'set -b' behavior of immediate notifications, we
# have to register SIGCHLD. But then that introduces race conditions.
# If we haven't called Register yet, then we won't know who to notify.
#log('job state %s', self.job_state)
p = self._MakeProcess(node, job_state=self.job_state)
pid = p.Start()
self.mem.last_job_id = pid # for $!
self.job_state.Register(pid, p)
self.waiter.Register(pid, p.WhenDone)
log('Started background job with pid %d', pid)
return 0
def _MakePipeline(self, node, job_state=None):
# NOTE: First or last one could use the "main" shell thread. Doesn't have
# to run in subshell. Although I guess it's simpler if it always does.
# I think bash has an option to control this? echo hi | read x; should
# test it.
pi = process.Pipeline(job_state=job_state)
for child in node.children:
p = self._MakeProcess(child) # NOTE: evaluates, does errexit guard
pi.Add(p)
return pi
def testPipeline(self):
print('BEFORE', os.listdir('/dev/fd'))
p = process.Pipeline()
p.Add(Process(process.ExternalThunk(['ls'])))
p.Add(Process(process.ExternalThunk(['cut', '-d', '.', '-f', '2'])))
p.Add(Process(process.ExternalThunk(['sort'])))
p.Add(Process(process.ExternalThunk(['uniq', '-c'])))
p.Run()
print('AFTER', os.listdir('/dev/fd'))
def testPipeline(self):
print('BEFORE', os.listdir('/dev/fd'))
p = process.Pipeline()
p.Add(_ExtProc(['ls']))
p.Add(_ExtProc(['cut', '-d', '.', '-f', '2']))
p.Add(_ExtProc(['sort']))
p.Add(_ExtProc(['uniq', '-c']))
pipe_status = p.Run(_WAITER)
log('pipe_status: %s', pipe_status)
print('AFTER', os.listdir('/dev/fd'))
def testPipeline(self):
node = _CommandNode('uniq -c', _ARENA)
cmd_ev = test_lib.InitCommandEvaluator(arena=_ARENA, ext_prog=_EXT_PROG)
print('BEFORE', os.listdir('/dev/fd'))
p = process.Pipeline()
p.Add(_ExtProc(['ls']))
p.Add(_ExtProc(['cut', '-d', '.', '-f', '2']))
p.Add(_ExtProc(['sort']))
p.AddLast((cmd_ev, node))
pipe_status = p.Run(_WAITER, _FD_STATE)
log('pipe_status: %s', pipe_status)
print('AFTER', os.listdir('/dev/fd'))
def testPipeline(self):
node = _CommandNode('uniq -c', self.arena)
cmd_ev = test_lib.InitCommandEvaluator(arena=self.arena,
ext_prog=self.ext_prog)
print('BEFORE', os.listdir('/dev/fd'))
p = process.Pipeline()
p.Add(self._ExtProc(['ls']))
p.Add(self._ExtProc(['cut', '-d', '.', '-f', '2']))
p.Add(self._ExtProc(['sort']))
p.AddLast((cmd_ev, node))
pipe_status = p.Run(self.waiter, self.fd_state)
log('pipe_status: %s', pipe_status)
print('AFTER', os.listdir('/dev/fd'))
def __init__(self, images):
self.hbox = Gtk.Box(Gtk.Orientation.HORIZONTAL)
self.menu_revealer = self._build_revealer()
self.video_monitor = Gtk.DrawingArea()
self.video_monitor.set_margin_left(6)
self.video_monitor.set_margin_right(6)
self.video_monitor.set_margin_bottom(6)
self.video_monitor.set_halign(Gtk.Align.FILL)
self.video_monitor.set_valign(Gtk.Align.FILL)
self.video_monitor.set_size_request(700, 400)
self.placeholder_pipeline = process.PlaceholderPipeline()
self.placeholder_bus = self.create_gstreamer_bus(
self.placeholder_pipeline.pipeline)
self.pipeline = process.Pipeline()
self.bus = self.create_gstreamer_bus(self.pipeline.pipeline)
self.xid = None
self.video_menu = menus.VideoMenu(self.pipeline, self.menu_revealer,
self.placeholder_pipeline)
self.audio_menu = menus.AudioMenu(self.pipeline, self.menu_revealer,
self.placeholder_pipeline)
self.stream_menu = menus.StreamMenu(self.pipeline, self.menu_revealer)
self.store_menu = menus.StoreMenu(self.pipeline, self.menu_revealer)
self.settings_menu = menus.SettingsMenu(self.pipeline,
self.menu_revealer)
self.images = images
self.controls = ControlBar(self.pipeline, self.menu_revealer,
self.images, self.video_menu,
self.audio_menu, self.stream_menu,
self.store_menu, self.settings_menu,
self.placeholder_pipeline)
self.controls.overlay_container.add(self.video_monitor)
self.controls.display_controls()
self.audio_level_display = audio_displays.AudioLevelDisplay(
Gtk.DrawingArea())
self.audio_level_box = self._build_audio_level_box()
self.controls.overlay_container.add_overlay(self.audio_level_box)
self.hbox.pack_start(self.controls.overlay_container, True, True, 0)
self.hbox.pack_start(self.menu_revealer, False, False, 0)
def testPipeline(self):
arena = test_lib.MakeArena('testPipeline')
node = _CommandNode('uniq -c', arena)
ex = test_lib.InitExecutor(arena=arena)
print('BEFORE', os.listdir('/dev/fd'))
p = process.Pipeline()
p.Add(_ExtProc(['ls']))
p.Add(_ExtProc(['cut', '-d', '.', '-f', '2']))
p.Add(_ExtProc(['sort']))
p.AddLast((ex, node))
pipe_status = p.Run(_WAITER, _FD_STATE)
log('pipe_status: %s', pipe_status)
print('AFTER', os.listdir('/dev/fd'))
def RunBackgroundJob(self, node):
# type: (command_t) -> int
"""
for & etc.
"""
# Special case for pipeline. There is some evidence here:
# https://www.gnu.org/software/libc/manual/html_node/Launching-Jobs.html#Launching-Jobs
#
# "You can either make all the processes in the process group be children
# of the shell process, or you can make one process in group be the
# ancestor of all the other processes in that group. The sample shell
# program presented in this chapter uses the first approach because it
# makes bookkeeping somewhat simpler."
UP_node = node
if UP_node.tag_() == command_e.Pipeline:
node = cast(command__Pipeline, UP_node)
pi = process.Pipeline()
for child in node.children:
p = self._MakeProcess(child)
p.Init_ParentPipeline(pi)
pi.Add(p)
pi.Start(self.waiter)
last_pid = pi.LastPid()
self.mem.last_bg_pid = last_pid # for $!
job_id = self.job_state.AddJob(pi) # show in 'jobs' list
# TODO: Put in tracer
#log('[%%%d] Started Pipeline with PID %d', job_id, last_pid)
else:
# Problem: to get the 'set -b' behavior of immediate notifications, we
# have to register SIGCHLD. But then that introduces race conditions.
# If we haven't called Register yet, then we won't know who to notify.
#log('job state %s', self.job_state)
p = self._MakeProcess(node)
pid = p.Start(trace.Fork())
self.mem.last_bg_pid = pid # for $!
job_id = self.job_state.AddJob(p) # show in 'jobs' list
# TODO: Put in tracer
#log('[%%%d] Started PID %d', job_id, pid)
return 0
def RunPipeline(self, node, status_out):
# type: (command__Pipeline, CompoundStatus) -> None
pi = process.Pipeline()
# First n-1 processes (which is empty when n == 1)
n = len(node.children)
for i in xrange(n - 1):
child = node.children[i]
# TODO: maybe determine these at parse time?
status_out.spids.append(location.SpanForCommand(child))
p = self._MakeProcess(child)
p.Init_ParentPipeline(pi)
pi.Add(p)
last_child = node.children[n-1]
# Last piece of code is in THIS PROCESS. 'echo foo | read line; echo $line'
pi.AddLast((self.cmd_ev, last_child))
status_out.spids.append(location.SpanForCommand(last_child))
status_out.codes = pi.Run(self.waiter, self.fd_state)
