2 from select import select
11 class ExceptionTimeout(Exception): pass
12 class ExceptionReadTimeout(Exception): pass
14 ssh_options = { 'StrictHostKeyChecking':'no',
16 'PasswordAuthentication':'no',
17 'ConnectTimeout':'%s' % COMMAND_TIMEOUT}
19 class Sopen(subprocess.Popen):
20 def kill(self, sig = signal.SIGTERM):
22 # NOTE: this also kills parent... so doesn't work like I want.
23 # NOTE: adding 'exec' before the cmd removes the extra sh, and
24 # partially addresses this problem.
25 #os.killpg(os.getpgid(self.pid), signal.SIGKILL)
26 os.kill(self.pid, sig)
28 # no such process, due to it already exiting...
32 def read_t(stream, count=1, timeout=COMMAND_TIMEOUT*2):
37 lin, lout, lerr = select([stream], [], [], timeout)
40 raise ExceptionReadTimeout("TIMEOUT reading from command")
43 outbytes = stream.read(count)
45 print 'no content yet.'
47 # the select timeout should catch this.
56 lin, lout, lerr = select([stream], [], [], timeout)
58 raise ExceptionReadTimeout("TIMEOUT reading from command")
60 return stream.read(count)
66 def run_noexcept(self, cmd, timeout=COMMAND_TIMEOUT*2):
69 return CMD.run(self,cmd,timeout)
70 except ExceptionTimeout:
71 print traceback.print_exc()
72 return ("", "ScriptTimeout")
73 except ExceptionReadTimeout:
74 print traceback.print_exc()
75 return ("", "RunningScriptTimeout")
76 except Exception, err:
77 from monitor.common import email_exception
81 def system(self, cmd, timeout=COMMAND_TIMEOUT*2):
82 (o,e) = self.run(cmd, timeout)
85 if self.s.returncode is None:
87 return self.s.returncode
89 def run(self, cmd, timeout=COMMAND_TIMEOUT*2):
91 s = Sopen(cmd, shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
93 (f_in, f_out, f_err) = (s.stdin, s.stdout, s.stderr)
94 lout, lin, lerr = select([f_out], [], [f_err], timeout)
95 if len(lin) == 0 and len(lout) == 0 and len(lerr) == 0:
96 # Reached a timeout! Nuke process so it does not hang.
97 print "TIMEOUT!!!!!!!!!!!!!!!!!!!"
98 s.kill(signal.SIGKILL)
99 raise ExceptionTimeout("TIMEOUT Running: %s" % cmd)
102 #print len(lin), len(lout), len(lerr)
108 #o_value = f_out.read()
109 flags = fcntl.fcntl(f_out, fcntl.F_GETFL)
110 fcntl.fcntl(f_out, fcntl.F_SETFL, flags | os.O_NONBLOCK)
113 o_value = read_t(f_out,1,30)
114 except ExceptionReadTimeout:
115 s.kill(signal.SIGKILL)
116 raise ExceptionReadTimeout("TIMEOUT: failed to read from cmd: %s" % cmd)
118 e_value = f_err.read()
120 o_value = o_value.strip()
121 e_value = e_value.strip()
126 s.kill(signal.SIGKILL)
128 return (o_value, e_value)
130 def runargs(self, args, timeout=COMMAND_TIMEOUT*2):
132 #print "CMD.run(%s)" % " ".join(args)
133 s = Sopen(args, shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
135 (f_in, f_out, f_err) = (s.stdin, s.stdout, s.stderr)
136 lout, lin, lerr = select([f_out], [], [f_err], timeout)
137 if len(lin) == 0 and len(lout) == 0 and len(lerr) == 0:
138 # Reached a timeout! Nuke process so it does not hang.
139 s.kill(signal.SIGKILL)
140 raise ExceptionTimeout("TIMEOUT Running: %s" % cmd)
141 o_value = f_out.read()
143 if o_value == "": # An error has occured
144 e_value = f_err.read()
146 o_value = o_value.strip()
147 e_value = e_value.strip()
152 s.kill(signal.SIGKILL)
154 return (o_value, e_value)
158 def __init__(self, user, host, port=22, options = ssh_options):
159 self.options = options
165 def __options_to_str(self):
167 for o,v in self.options.iteritems():
168 options = options + "-o %s=%s " % (o,v)
171 def run(self, cmd, timeout=COMMAND_TIMEOUT*2):
172 cmd = "ssh -p %s %s %s@%s '%s'" % (self.port, self.__options_to_str(),
173 self.user, self.host, cmd)
174 #print "SSH.run(%s)" % cmd
175 return CMD.run(self, cmd, timeout)
177 def get_file(self, rmt_filename, local_filename=None):
178 if local_filename == None:
179 local_filename = "./"
180 cmd = "scp -P %s -B %s %s@%s:%s %s" % (self.port, self.__options_to_str(),
181 self.user, self.host,
182 rmt_filename, local_filename)
184 # errors will be on stderr,
185 # success will have a blank stderr...
186 return CMD.run_noexcept(self, cmd)
188 def run_noexcept(self, cmd):
189 cmd = "ssh -p %s %s %s@%s '%s'" % (self.port, self.__options_to_str(),
190 self.user, self.host, cmd)
191 #print "SSH.run_noexcept(%s)" % cmd
192 return CMD.run_noexcept(self, cmd)
194 def run_noexcept2(self, cmd, timeout=COMMAND_TIMEOUT*2):
195 cmd = "exec ssh -p %s %s %s@%s %s" % (self.port, self.__options_to_str(),
196 self.user, self.host, cmd)
197 r = CMD.run_noexcept(self, cmd, timeout)
202 def system2(self, cmd, timeout=COMMAND_TIMEOUT*2):
203 cmd = "ssh -p %s %s %s@%s %s" % (self.port, self.__options_to_str(),
204 self.user, self.host, cmd)
205 #print "SSH.system2(%s)" % cmd
206 return CMD.system(self, cmd, timeout)
209 cmd = "ssh -p %s %s %s@%s '%s'" % (self.port, self.__options_to_str(),
210 self.user, self.host, cmd)
213 (f_in, f_out, f_err) = os.popen3(cmd)
216 if value == "": # An error has occured
218 value = value.strip()
221 print " == %s" % value
229 self.start = time.time()
232 self.end = time.time()
233 t = self.end-self.start
237 self.end = time.time()
238 t = self.end-self.start
239 self.start = self.end