def xsystem(cmd, inputdata=None):
""" Run 'cmd' and return its output in a string. Optionally, 'inputdata'
is written into command's stdin. """
try:
pipe = Popen(cmd, stdout=PIPE, stdin=PIPE)
except OSError:
warning('Unable to run %s\n' %(' '.join(cmd)))
return None
if inputdata:
try:
pipein = pipe.stdin
pipein.write(inputdata)
except IOError:
warning("IOError while writing to command %s\n" %(' '.join(cmd)))
return None
finally:
pipein.close()
try:
pipeout = pipe.stdout
result = pipeout.read()
except IOError:
warning("IOError while reading from command %s\n" %(' '.join(cmd)))
return None
finally:
pipeout.close()
pipe.wait()
if pipe.returncode != 0:
warning('%s did not exit cleanly\n' %(' '.join(cmd)))
return None
return result
def xrun(cmd, cb, ctx, inputdata=None):
""" Run 'cmd' (a list of command line arguments). Call cb(data, ctx),
when the command finishes with its output given to cb() at parameter
'data'. If 'inputdata' is given, feed it to the command from stdin.
The result is relayed through the gobject mainloop.
"""
(rfd, wfd) = xpipe()
if rfd < 0:
return False
pid = xfork()
if pid == -1:
warning('Could not fork a new process\n')
return False
if pid != 0:
xclose(wfd)
return xrunwatch(rfd, cb, ctx, pid)
xclose(rfd)
w = fdopen(wfd, 'w')
try:
pipe = Popen(cmd, stdout=PIPE, stdin=PIPE)
except OSError:
warning('Unable to run %s\n' %(' '.join(cmd)))
w.write('-1\0')
abort()
w.write(str(pipe.pid) + '\0')
w.flush()
if inputdata:
try:
pipein = pipe.stdin
pipein.write(inputdata)
except IOError:
warning("IOError while writing to command %s\n" %(' '.join(cmd)))
abort()
pipein.close()
try:
pipeout = pipe.stdout
result = pipeout.read()
except IOError:
warning("IOError while reading from command %s\n" %(' '.join(cmd)))
abort()
pipeout.close()
pipe.wait()
if pipe.returncode != 0:
warning('%s did not exit cleanly\n' %(' '.join(cmd)))
abort()
w.write(result)
w.close()
abort()
