def _CheckStatus(self, status, node):
"""Raises ErrExitFailure, maybe with location info attached."""
if self.exec_opts.ErrExit() and status != 0:
# NOTE: Sometimes location info is duplicated, like on UsageError, or a
# bad redirect. Also, pipelines can fail twice.
if node.tag == command_e.SimpleCommand:
reason = 'command in '
span_id = word.LeftMostSpanForWord(node.words[0])
elif node.tag == command_e.Assignment:
reason = 'assignment in '
span_id = self._SpanIdForAssignment(node)
elif node.tag == command_e.Subshell:
reason = 'subshell invoked from '
span_id = node.spids[0]
elif node.tag == command_e.Pipeline:
# The whole pipeline can fail separately
reason = 'pipeline invoked from '
span_id = node.spids[0] # only one spid
else:
# NOTE: The fallback of CurrentSpanId() fills this in.
reason = ''
span_id = const.NO_INTEGER
raise util.ErrExitFailure(
'Exiting with status %d (%sPID %d)', status, reason, posix.getpid(),
span_id=span_id, status=status)
def _CheckStatus(self, status, node, argv0=None):
"""ErrExitFailure with location info attached."""
if self.exec_opts.ErrExit() and status != 0:
# Add context based on node type
if node.tag == command_e.SimpleCommand:
argv0 = argv0 or '<unknown>'
raise util.ErrExitFailure(
'[%d] %r command exited with status %d', posix.getpid(), argv0,
status, word=node.words[0], status=status)
elif node.tag == command_e.Assignment:
span_id = self._SpanIdForAssignment(node)
raise util.ErrExitFailure(
'[%d] assignment exited with status %d', posix.getpid(),
status, span_id=span_id, status=status)
else:
raise util.ErrExitFailure(
'[%d] %r exited with status %d', posix.getpid(),
node.__class__.__name__, status, status=status)
def RunCommandSub(self, node):
p = self._MakeProcess(node,
disable_errexit=not self.exec_opts.strict_errexit)
r, w = posix.pipe()
p.AddStateChange(process.StdoutToPipe(r, w))
pid = p.Start()
#log('Command sub started %d', pid)
self.waiter.Register(pid, p.WhenDone)
chunks = []
posix.close(w) # not going to write
while True:
byte_str = posix.read(r, 4096)
if not byte_str:
break
chunks.append(byte_str)
posix.close(r)
status = p.WaitUntilDone(self.waiter)
# OSH has the concept of aborting in the middle of a WORD. We're not
# waiting until the command is over!
if self.exec_opts.strict_errexit:
if self.exec_opts.ErrExit() and status != 0:
raise util.ErrExitFailure(
'Command sub exited with status %d (%r)', status,
node.__class__.__name__)
else:
# Set a flag so we check errexit at the same time as bash. Example:
#
# a=$(false)
# echo foo # no matter what comes here, the flag is reset
#
# Set ONLY until this command node has finished executing.
self.check_command_sub_status = True
self.mem.last_status = status
# Runtime errors test case: # $("echo foo > $@")
# Why rstrip()?
# https://unix.stackexchange.com/questions/17747/why-does-shell-command-substitution-gobble-up-a-trailing-newline-char
return ''.join(chunks).rstrip('\n')