tools/patman/cros_subprocess.py

37     both stdout and stderr while it is running. We do this so we can monitor
42         Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
56     def __init__(self, args, stdin=None, stdout=PIPE_PTY, stderr=PIPE_PTY,  argument
65             stderr: See subprocess.Popen(), except that we support the sentinel
79         if stderr == PIPE_PTY:
81             stderr = os.fdopen(stderr_pty[1])
84                 stdout=stdout, stderr=stderr, shell=shell, cwd=cwd, env=env,
92         # Note that if stderr is STDOUT, then self.stderr will be set to None by
97             self.stderr = os.fdopen(stderr_pty[0])
104         """Interact with process: Read data from stdout and stderr.
115                         sys.stdout or sys.stderr.
125             A tuple (stdout, stderr, combined) which is the data received on
126             stdout, stderr and the combined data (interleaved stdout and stderr).
129             set both stdout and stderr to PIPE or PIPE_PTY. Even then it depends on
131             between stdout and stderr quickly in succession, by the time we come to
133             all the stdout lines, then all the stderr lines. So the interleaving
135             stderr=cros_subprocess.STDOUT to the constructor.
137             This feature is still useful for subprocesses where stderr is
140             Note also that if you set stderr to STDOUT, then stderr will be empty
147         stderr = None # Return
160         if self.stderr and self.stderr != self.stdout:
161             read_set.append(self.stderr)
162             stderr = []
203             if self.stderr in rlist:
207                     data = os.read(self.stderr.fileno(), 1024)
211                     self.stderr.close()
212                     read_set.remove(self.stderr)
214                     stderr.append(data)
217                         output(sys.stderr, data)
224         if stderr is not None:
225             stderr = ''.join(stderr)
227             stderr = ''
237             if stderr:
238                 stderr = self._translate_newlines(stderr)
241         return (stdout, stderr, combined)
275             if stream == sys.stderr:
290         # The total length of stdout and stderr should equal the combined length
300         """Check stdout and stderr"""
302         cmd = 'echo fred >/dev/stderr && false || echo bad'
311         cmd = 'echo test >/dev/stderr'
321         cmd = ['echo', 'test', '>/dev/stderr']
330         cmd = ['echo', 'test', '>/dev/stderr']
390         plist = Popen(both_cmds, stdout=subprocess.PIPE, stderr=subprocess.PIPE,