| 1 | #!/usr/bin/env python2
|
| 2 | """
|
| 3 | builtin_process.py - Builtins that deal with processes or modify process state.
|
| 4 |
|
| 5 | This is sort of the opposite of builtin_pure.py.
|
| 6 | """
|
| 7 | from __future__ import print_function
|
| 8 |
|
| 9 | import resource
|
| 10 | from resource import (RLIM_INFINITY, RLIMIT_CORE, RLIMIT_CPU, RLIMIT_DATA,
|
| 11 | RLIMIT_FSIZE, RLIMIT_NOFILE, RLIMIT_STACK, RLIMIT_AS)
|
| 12 | from signal import SIGCONT
|
| 13 |
|
| 14 | from _devbuild.gen import arg_types
|
| 15 | from _devbuild.gen.syntax_asdl import loc, loc_t, CompoundWord
|
| 16 | from _devbuild.gen.runtime_asdl import (cmd_value, job_state_e, wait_status,
|
| 17 | wait_status_e)
|
| 18 | from core import dev
|
| 19 | from core import error
|
| 20 | from core.error import e_usage, e_die_status
|
| 21 | from core import process # W1_EXITED, etc.
|
| 22 | from core import pyos
|
| 23 | from core import pyutil
|
| 24 | from core import vm
|
| 25 | from frontend import flag_util
|
| 26 | from frontend import match
|
| 27 | from frontend import signal_def
|
| 28 | from frontend import typed_args
|
| 29 | from frontend import args
|
| 30 | from mycpp import mops
|
| 31 | from mycpp import mylib
|
| 32 | from mycpp.mylib import log, tagswitch, print_stderr
|
| 33 |
|
| 34 | import posix_ as posix
|
| 35 |
|
| 36 | from typing import TYPE_CHECKING, List, Tuple, Optional, cast
|
| 37 | if TYPE_CHECKING:
|
| 38 | from core.process import Waiter, ExternalProgram, FdState
|
| 39 | from core import executor
|
| 40 | from core import state
|
| 41 | from display import ui
|
| 42 |
|
| 43 | _ = log
|
| 44 |
|
| 45 |
|
| 46 | def PrintSignals():
|
| 47 | # type: () -> None
|
| 48 | # Iterate over signals and print them
|
| 49 | for sig_num in xrange(signal_def.MaxSigNumber()):
|
| 50 | sig_name = signal_def.GetName(sig_num)
|
| 51 | if sig_name is None:
|
| 52 | continue
|
| 53 | print('%2d %s' % (sig_num, sig_name))
|
| 54 |
|
| 55 |
|
| 56 | class Jobs(vm._Builtin):
|
| 57 | """List jobs."""
|
| 58 |
|
| 59 | def __init__(self, job_list):
|
| 60 | # type: (process.JobList) -> None
|
| 61 | self.job_list = job_list
|
| 62 |
|
| 63 | def Run(self, cmd_val):
|
| 64 | # type: (cmd_value.Argv) -> int
|
| 65 |
|
| 66 | attrs, arg_r = flag_util.ParseCmdVal('jobs', cmd_val)
|
| 67 | arg = arg_types.jobs(attrs.attrs)
|
| 68 |
|
| 69 | # osh doesn't support JOBSPEC arg
|
| 70 | arg_r.Done()
|
| 71 |
|
| 72 | if arg.l:
|
| 73 | style = process.STYLE_LONG
|
| 74 | elif arg.p:
|
| 75 | style = process.STYLE_PID_ONLY
|
| 76 | else:
|
| 77 | style = process.STYLE_DEFAULT
|
| 78 |
|
| 79 | self.job_list.DisplayJobs(style)
|
| 80 |
|
| 81 | if arg.debug:
|
| 82 | self.job_list.DebugPrint()
|
| 83 |
|
| 84 | return 0
|
| 85 |
|
| 86 |
|
| 87 | class Fg(vm._Builtin):
|
| 88 | """Put a job in the foreground."""
|
| 89 |
|
| 90 | def __init__(self, job_control, job_list, waiter):
|
| 91 | # type: (process.JobControl, process.JobList, Waiter) -> None
|
| 92 | self.job_control = job_control
|
| 93 | self.job_list = job_list
|
| 94 | self.waiter = waiter
|
| 95 | self.exec_opts = waiter.exec_opts
|
| 96 |
|
| 97 | def Run(self, cmd_val):
|
| 98 | # type: (cmd_value.Argv) -> int
|
| 99 |
|
| 100 | job_spec = '' # Job spec for current job is the default
|
| 101 | if len(cmd_val.argv) > 1:
|
| 102 | job_spec = cmd_val.argv[1]
|
| 103 |
|
| 104 | job = self.job_list.JobFromSpec(job_spec)
|
| 105 | # note: the 'wait' builtin falls back to JobFromPid()
|
| 106 | if job is None:
|
| 107 | print_stderr('fg: No job to put in the foreground')
|
| 108 | return 1
|
| 109 |
|
| 110 | pgid = job.ProcessGroupId()
|
| 111 | assert pgid != process.INVALID_PGID, \
|
| 112 | 'Processes put in the background should have a PGID'
|
| 113 |
|
| 114 | # Put the job's process group back into the foreground. GiveTerminal() must
|
| 115 | # be called before sending SIGCONT or else the process might immediately get
|
| 116 | # suspended again if it tries to read/write on the terminal.
|
| 117 | self.job_control.MaybeGiveTerminal(pgid)
|
| 118 | posix.killpg(pgid, SIGCONT) # Send signal
|
| 119 |
|
| 120 | if self.exec_opts.interactive():
|
| 121 | print_stderr('[%%%d] PID %d Continued' % (job.job_id, pgid))
|
| 122 |
|
| 123 | # We are not using waitpid(WCONTINUE) and WIFCONTINUED() in
|
| 124 | # WaitForOne() -- it's an extension to POSIX that isn't necessary for 'fg'
|
| 125 | job.SetForeground()
|
| 126 | job.state = job_state_e.Running
|
| 127 |
|
| 128 | status = -1
|
| 129 |
|
| 130 | wait_st = job.JobWait(self.waiter)
|
| 131 | UP_wait_st = wait_st
|
| 132 | with tagswitch(wait_st) as case:
|
| 133 | if case(wait_status_e.Proc):
|
| 134 | wait_st = cast(wait_status.Proc, UP_wait_st)
|
| 135 | if wait_st.state == job_state_e.Exited:
|
| 136 | self.job_list.PopChildProcess(job.PidForWait())
|
| 137 | self.job_list.CleanupWhenJobExits(job)
|
| 138 | status = wait_st.code
|
| 139 |
|
| 140 | elif case(wait_status_e.Pipeline):
|
| 141 | wait_st = cast(wait_status.Pipeline, UP_wait_st)
|
| 142 | # TODO: handle PIPESTATUS? Is this right?
|
| 143 | status = wait_st.codes[-1]
|
| 144 |
|
| 145 | elif case(wait_status_e.Cancelled):
|
| 146 | wait_st = cast(wait_status.Cancelled, UP_wait_st)
|
| 147 | status = 128 + wait_st.sig_num
|
| 148 |
|
| 149 | else:
|
| 150 | raise AssertionError()
|
| 151 |
|
| 152 | return status
|
| 153 |
|
| 154 |
|
| 155 | class Bg(vm._Builtin):
|
| 156 | """Put a job in the background."""
|
| 157 |
|
| 158 | def __init__(self, job_list):
|
| 159 | # type: (process.JobList) -> None
|
| 160 | self.job_list = job_list
|
| 161 |
|
| 162 | def Run(self, cmd_val):
|
| 163 | # type: (cmd_value.Argv) -> int
|
| 164 |
|
| 165 | # How does this differ from 'fg'? It doesn't wait and it sets controlling
|
| 166 | # terminal?
|
| 167 |
|
| 168 | raise error.Usage("isn't implemented", loc.Missing)
|
| 169 |
|
| 170 |
|
| 171 | class Fork(vm._Builtin):
|
| 172 |
|
| 173 | def __init__(self, shell_ex):
|
| 174 | # type: (vm._Executor) -> None
|
| 175 | self.shell_ex = shell_ex
|
| 176 |
|
| 177 | def Run(self, cmd_val):
|
| 178 | # type: (cmd_value.Argv) -> int
|
| 179 | _, arg_r = flag_util.ParseCmdVal('fork',
|
| 180 | cmd_val,
|
| 181 | accept_typed_args=True)
|
| 182 |
|
| 183 | arg, location = arg_r.Peek2()
|
| 184 | if arg is not None:
|
| 185 | e_usage('got unexpected argument %r' % arg, location)
|
| 186 |
|
| 187 | cmd_frag = typed_args.RequiredBlockAsFrag(cmd_val)
|
| 188 | return self.shell_ex.RunBackgroundJob(cmd_frag)
|
| 189 |
|
| 190 |
|
| 191 | class ForkWait(vm._Builtin):
|
| 192 |
|
| 193 | def __init__(self, shell_ex):
|
| 194 | # type: (vm._Executor) -> None
|
| 195 | self.shell_ex = shell_ex
|
| 196 |
|
| 197 | def Run(self, cmd_val):
|
| 198 | # type: (cmd_value.Argv) -> int
|
| 199 | _, arg_r = flag_util.ParseCmdVal('forkwait',
|
| 200 | cmd_val,
|
| 201 | accept_typed_args=True)
|
| 202 | arg, location = arg_r.Peek2()
|
| 203 | if arg is not None:
|
| 204 | e_usage('got unexpected argument %r' % arg, location)
|
| 205 |
|
| 206 | cmd_frag = typed_args.RequiredBlockAsFrag(cmd_val)
|
| 207 | return self.shell_ex.RunSubshell(cmd_frag)
|
| 208 |
|
| 209 |
|
| 210 | class Exec(vm._Builtin):
|
| 211 |
|
| 212 | def __init__(
|
| 213 | self,
|
| 214 | mem, # type: state.Mem
|
| 215 | ext_prog, # type: ExternalProgram
|
| 216 | fd_state, # type: FdState
|
| 217 | search_path, # type: executor.SearchPath
|
| 218 | errfmt, # type: ui.ErrorFormatter
|
| 219 | ):
|
| 220 | # type: (...) -> None
|
| 221 | self.mem = mem
|
| 222 | self.ext_prog = ext_prog
|
| 223 | self.fd_state = fd_state
|
| 224 | self.search_path = search_path
|
| 225 | self.errfmt = errfmt
|
| 226 |
|
| 227 | def Run(self, cmd_val):
|
| 228 | # type: (cmd_value.Argv) -> int
|
| 229 | attrs, arg_r = flag_util.ParseCmdVal('exec_', cmd_val)
|
| 230 | arg = arg_types.exec_(attrs.attrs)
|
| 231 |
|
| 232 | # Apply redirects in this shell. # NOTE: Redirects were processed earlier.
|
| 233 | if arg_r.AtEnd():
|
| 234 | self.fd_state.MakePermanent()
|
| 235 | return 0
|
| 236 |
|
| 237 | environ = self.mem.GetEnv()
|
| 238 | if 0:
|
| 239 | log('E %r', environ)
|
| 240 | log('E %r', environ)
|
| 241 | log('ZZ %r', environ.get('ZZ'))
|
| 242 | i = arg_r.i
|
| 243 | cmd = cmd_val.argv[i]
|
| 244 | argv0_path = self.search_path.CachedLookup(cmd)
|
| 245 | if argv0_path is None:
|
| 246 | e_die_status(127, 'exec: %r not found' % cmd, cmd_val.arg_locs[1])
|
| 247 |
|
| 248 | # shift off 'exec', and remove typed args because they don't apply
|
| 249 | if arg.a is not None:
|
| 250 | c2_argv = [arg.a]
|
| 251 | c2_argv.extend(cmd_val.argv[i+1:])
|
| 252 | else:
|
| 253 | c2_argv = cmd_val.argv[i:]
|
| 254 |
|
| 255 | c2 = cmd_value.Argv(c2_argv, cmd_val.arg_locs[i:],
|
| 256 | cmd_val.is_last_cmd, cmd_val.self_obj, None)
|
| 257 |
|
| 258 | self.ext_prog.Exec(argv0_path, c2, environ) # NEVER RETURNS
|
| 259 | # makes mypy and C++ compiler happy
|
| 260 | raise AssertionError('unreachable')
|
| 261 |
|
| 262 |
|
| 263 | class Wait(vm._Builtin):
|
| 264 | """
|
| 265 | wait: wait [-n] [id ...]
|
| 266 | Wait for job completion and return exit status.
|
| 267 |
|
| 268 | Waits for each process identified by an ID, which may be a process ID or a
|
| 269 | job specification, and reports its termination status. If ID is not
|
| 270 | given, waits for all currently active child processes, and the return
|
| 271 | status is zero. If ID is a a job specification, waits for all processes
|
| 272 | in that job's pipeline.
|
| 273 |
|
| 274 | If the -n option is supplied, waits for the next job to terminate and
|
| 275 | returns its exit status.
|
| 276 |
|
| 277 | Exit Status:
|
| 278 | Returns the status of the last ID; fails if ID is invalid or an invalid
|
| 279 | option is given.
|
| 280 | """
|
| 281 |
|
| 282 | def __init__(
|
| 283 | self,
|
| 284 | waiter, # type: Waiter
|
| 285 | job_list, #type: process.JobList
|
| 286 | mem, # type: state.Mem
|
| 287 | tracer, # type: dev.Tracer
|
| 288 | errfmt, # type: ui.ErrorFormatter
|
| 289 | ):
|
| 290 | # type: (...) -> None
|
| 291 | self.waiter = waiter
|
| 292 | self.job_list = job_list
|
| 293 | self.mem = mem
|
| 294 | self.tracer = tracer
|
| 295 | self.errfmt = errfmt
|
| 296 | self.exec_opts = waiter.exec_opts
|
| 297 |
|
| 298 | def Run(self, cmd_val):
|
| 299 | # type: (cmd_value.Argv) -> int
|
| 300 | with dev.ctx_Tracer(self.tracer, 'wait', cmd_val.argv):
|
| 301 | return self._Run(cmd_val)
|
| 302 |
|
| 303 | def _WaitForJobs(self, job_ids, arg_locs):
|
| 304 | # type: (List[str], List[CompoundWord]) -> int
|
| 305 |
|
| 306 | # Get list of jobs. Then we need to check if they are ALL stopped.
|
| 307 | # Returns the exit code of the last one on the COMMAND LINE, not the
|
| 308 | # exit code of last one to FINISH.
|
| 309 |
|
| 310 | jobs = [] # type: List[process.Job]
|
| 311 | for i, job_id in enumerate(job_ids):
|
| 312 | location = arg_locs[i]
|
| 313 |
|
| 314 | job = None # type: Optional[process.Job]
|
| 315 | if job_id == '' or job_id.startswith('%'):
|
| 316 | job = self.job_list.JobFromSpec(job_id)
|
| 317 |
|
| 318 | if job is None:
|
| 319 | #log('JOB %s', job_id)
|
| 320 | # Does it look like a PID?
|
| 321 | try:
|
| 322 | pid = int(job_id)
|
| 323 | except ValueError:
|
| 324 | raise error.Usage(
|
| 325 | 'expected PID or jobspec, got %r' % job_id, location)
|
| 326 |
|
| 327 | job = self.job_list.JobFromPid(pid)
|
| 328 | #log('WAIT JOB %r', job)
|
| 329 |
|
| 330 | if job is None:
|
| 331 | self.errfmt.Print_("Job %s wasn't found" % job_id,
|
| 332 | blame_loc=location)
|
| 333 | return 127
|
| 334 |
|
| 335 | jobs.append(job)
|
| 336 |
|
| 337 | status = 1 # error
|
| 338 | for job in jobs:
|
| 339 | # polymorphic call: Process, Pipeline
|
| 340 | wait_st = job.JobWait(self.waiter)
|
| 341 |
|
| 342 | UP_wait_st = wait_st
|
| 343 | with tagswitch(wait_st) as case:
|
| 344 | if case(wait_status_e.Proc):
|
| 345 | wait_st = cast(wait_status.Proc, UP_wait_st)
|
| 346 | if wait_st.state == job_state_e.Exited:
|
| 347 | self.job_list.PopChildProcess(job.PidForWait())
|
| 348 | self.job_list.CleanupWhenJobExits(job)
|
| 349 | status = wait_st.code
|
| 350 |
|
| 351 | elif case(wait_status_e.Pipeline):
|
| 352 | wait_st = cast(wait_status.Pipeline, UP_wait_st)
|
| 353 | # TODO: handle PIPESTATUS? Is this right?
|
| 354 | status = wait_st.codes[-1]
|
| 355 |
|
| 356 | # It would be logical to set PIPESTATUS here, but it's NOT
|
| 357 | # what other shells do
|
| 358 | #
|
| 359 | # I think PIPESTATUS is legacy, and we can design better
|
| 360 | # YSH semantics
|
| 361 | #self.mem.SetPipeStatus(wait_st.codes)
|
| 362 |
|
| 363 | elif case(wait_status_e.Cancelled):
|
| 364 | wait_st = cast(wait_status.Cancelled, UP_wait_st)
|
| 365 | status = 128 + wait_st.sig_num
|
| 366 |
|
| 367 | else:
|
| 368 | raise AssertionError()
|
| 369 |
|
| 370 | # Return the last status
|
| 371 | return status
|
| 372 |
|
| 373 | def _WaitNext(self):
|
| 374 | # type: () -> int
|
| 375 |
|
| 376 | # Loop until there is one fewer process running, there's nothing to wait
|
| 377 | # for, or there's a signal
|
| 378 | n = self.job_list.NumRunning()
|
| 379 | if n == 0:
|
| 380 | status = 127
|
| 381 | else:
|
| 382 | target = n - 1
|
| 383 | status = 0
|
| 384 | while self.job_list.NumRunning() > target:
|
| 385 | result, w1_arg = self.waiter.WaitForOne()
|
| 386 | if result == process.W1_EXITED:
|
| 387 | pid = w1_arg
|
| 388 | pr = self.job_list.PopChildProcess(pid)
|
| 389 | # TODO: background pipelines don't clean up properly,
|
| 390 | # because only the last PID is registered in
|
| 391 | # job_list.pid_to_job
|
| 392 | self.job_list.CleanupWhenProcessExits(pid)
|
| 393 |
|
| 394 | if pr is None:
|
| 395 | if self.exec_opts.verbose_warn():
|
| 396 | print_stderr(
|
| 397 | "oils wait: PID %d exited, but oils didn't start it"
|
| 398 | % pid)
|
| 399 | else:
|
| 400 | status = pr.status
|
| 401 |
|
| 402 | elif result == process.W1_NO_CHILDREN:
|
| 403 | status = 127
|
| 404 | break
|
| 405 |
|
| 406 | elif result == process.W1_CALL_INTR: # signal
|
| 407 | status = 128 + w1_arg
|
| 408 | break
|
| 409 |
|
| 410 | return status
|
| 411 |
|
| 412 | def _Run(self, cmd_val):
|
| 413 | # type: (cmd_value.Argv) -> int
|
| 414 | attrs, arg_r = flag_util.ParseCmdVal('wait', cmd_val)
|
| 415 | arg = arg_types.wait(attrs.attrs)
|
| 416 |
|
| 417 | job_ids, arg_locs = arg_r.Rest2()
|
| 418 |
|
| 419 | if len(job_ids):
|
| 420 | # Note: -n and --all ignored in this case, like bash
|
| 421 | return self._WaitForJobs(job_ids, arg_locs)
|
| 422 |
|
| 423 | if arg.n:
|
| 424 | return self._WaitNext()
|
| 425 |
|
| 426 | # 'wait' or wait --all
|
| 427 |
|
| 428 | status = 0
|
| 429 |
|
| 430 | # Note: NumRunning() makes sure we ignore stopped processes, which
|
| 431 | # cause WaitForOne() to return
|
| 432 | while self.job_list.NumRunning() != 0:
|
| 433 | result, w1_arg = self.waiter.WaitForOne()
|
| 434 | if result == process.W1_EXITED:
|
| 435 | pid = w1_arg
|
| 436 | pr = self.job_list.PopChildProcess(pid)
|
| 437 | # TODO: background pipelines don't clean up properly, because
|
| 438 | # only the last PID is registered in job_list.pid_to_job
|
| 439 | self.job_list.CleanupWhenProcessExits(pid)
|
| 440 |
|
| 441 | if arg.verbose:
|
| 442 | self.errfmt.PrintMessage(
|
| 443 | '(wait) PID %d exited with status %d' %
|
| 444 | (pid, pr.status), cmd_val.arg_locs[0])
|
| 445 |
|
| 446 | if pr.status != 0 and arg.all: # YSH extension: respect failure
|
| 447 | if arg.verbose:
|
| 448 | self.errfmt.PrintMessage(
|
| 449 | 'wait --all: will fail with status 1')
|
| 450 | status = 1 # set status, but keep waiting
|
| 451 |
|
| 452 | if result == process.W1_NO_CHILDREN:
|
| 453 | break # status is 0
|
| 454 |
|
| 455 | if result == process.W1_CALL_INTR:
|
| 456 | status = 128 + w1_arg
|
| 457 | break
|
| 458 |
|
| 459 | return status
|
| 460 |
|
| 461 |
|
| 462 | class Umask(vm._Builtin):
|
| 463 |
|
| 464 | def __init__(self):
|
| 465 | # type: () -> None
|
| 466 | """Dummy constructor for mycpp."""
|
| 467 | pass
|
| 468 |
|
| 469 | def Run(self, cmd_val):
|
| 470 | # type: (cmd_value.Argv) -> int
|
| 471 |
|
| 472 | argv = cmd_val.argv[1:]
|
| 473 | if len(argv) == 0:
|
| 474 | # umask() has a dumb API: you can't get it without modifying it first!
|
| 475 | # NOTE: dash disables interrupts around the two umask() calls, but that
|
| 476 | # shouldn't be a concern for us. Signal handlers won't call umask().
|
| 477 | mask = posix.umask(0)
|
| 478 | posix.umask(mask) #
|
| 479 | print('0%03o' % mask) # octal format
|
| 480 | return 0
|
| 481 |
|
| 482 | if len(argv) == 1:
|
| 483 | a = argv[0]
|
| 484 | try:
|
| 485 | new_mask = int(a, 8)
|
| 486 | except ValueError:
|
| 487 | # NOTE: This also happens when we have '8' or '9' in the input.
|
| 488 | print_stderr(
|
| 489 | "oils warning: umask with symbolic input isn't implemented"
|
| 490 | )
|
| 491 | return 1
|
| 492 |
|
| 493 | posix.umask(new_mask)
|
| 494 | return 0
|
| 495 |
|
| 496 | e_usage('umask: unexpected arguments', loc.Missing)
|
| 497 |
|
| 498 |
|
| 499 | def _LimitString(lim, factor):
|
| 500 | # type: (mops.BigInt, int) -> str
|
| 501 | if mops.Equal(lim, mops.FromC(RLIM_INFINITY)):
|
| 502 | return 'unlimited'
|
| 503 | else:
|
| 504 | i = mops.Div(lim, mops.IntWiden(factor))
|
| 505 | return mops.ToStr(i)
|
| 506 |
|
| 507 |
|
| 508 | class Ulimit(vm._Builtin):
|
| 509 |
|
| 510 | def __init__(self):
|
| 511 | # type: () -> None
|
| 512 | """Dummy constructor for mycpp."""
|
| 513 |
|
| 514 | self._table = None # type: List[Tuple[str, int, int, str]]
|
| 515 |
|
| 516 | def _Table(self):
|
| 517 | # type: () -> List[Tuple[str, int, int, str]]
|
| 518 |
|
| 519 | # POSIX 2018
|
| 520 | #
|
| 521 | # https://pubs.opengroup.org/onlinepubs/9699919799/functions/getrlimit.html
|
| 522 | if self._table is None:
|
| 523 | # This table matches _ULIMIT_RESOURCES in frontend/flag_def.py
|
| 524 |
|
| 525 | # flag, RLIMIT_X, factor, description
|
| 526 | self._table = [
|
| 527 | # Following POSIX and most shells except bash, -f is in
|
| 528 | # blocks of 512 bytes
|
| 529 | ('-c', RLIMIT_CORE, 512, 'core dump size'),
|
| 530 | ('-d', RLIMIT_DATA, 1024, 'data segment size'),
|
| 531 | ('-f', RLIMIT_FSIZE, 512, 'file size'),
|
| 532 | ('-n', RLIMIT_NOFILE, 1, 'file descriptors'),
|
| 533 | ('-s', RLIMIT_STACK, 1024, 'stack size'),
|
| 534 | ('-t', RLIMIT_CPU, 1, 'CPU seconds'),
|
| 535 | ('-v', RLIMIT_AS, 1024, 'address space size'),
|
| 536 | ]
|
| 537 |
|
| 538 | return self._table
|
| 539 |
|
| 540 | def _FindFactor(self, what):
|
| 541 | # type: (int) -> int
|
| 542 | for _, w, factor, _ in self._Table():
|
| 543 | if w == what:
|
| 544 | return factor
|
| 545 | raise AssertionError()
|
| 546 |
|
| 547 | def Run(self, cmd_val):
|
| 548 | # type: (cmd_value.Argv) -> int
|
| 549 |
|
| 550 | attrs, arg_r = flag_util.ParseCmdVal('ulimit', cmd_val)
|
| 551 | arg = arg_types.ulimit(attrs.attrs)
|
| 552 |
|
| 553 | what = 0
|
| 554 | num_what_flags = 0
|
| 555 |
|
| 556 | if arg.c:
|
| 557 | what = RLIMIT_CORE
|
| 558 | num_what_flags += 1
|
| 559 |
|
| 560 | if arg.d:
|
| 561 | what = RLIMIT_DATA
|
| 562 | num_what_flags += 1
|
| 563 |
|
| 564 | if arg.f:
|
| 565 | what = RLIMIT_FSIZE
|
| 566 | num_what_flags += 1
|
| 567 |
|
| 568 | if arg.n:
|
| 569 | what = RLIMIT_NOFILE
|
| 570 | num_what_flags += 1
|
| 571 |
|
| 572 | if arg.s:
|
| 573 | what = RLIMIT_STACK
|
| 574 | num_what_flags += 1
|
| 575 |
|
| 576 | if arg.t:
|
| 577 | what = RLIMIT_CPU
|
| 578 | num_what_flags += 1
|
| 579 |
|
| 580 | if arg.v:
|
| 581 | what = RLIMIT_AS
|
| 582 | num_what_flags += 1
|
| 583 |
|
| 584 | if num_what_flags > 1:
|
| 585 | raise error.Usage(
|
| 586 | 'can only handle one resource at a time; got too many flags',
|
| 587 | cmd_val.arg_locs[0])
|
| 588 |
|
| 589 | # Print all
|
| 590 | show_all = arg.a or arg.all
|
| 591 | if show_all:
|
| 592 | if num_what_flags > 0:
|
| 593 | raise error.Usage("doesn't accept resource flags with -a",
|
| 594 | cmd_val.arg_locs[0])
|
| 595 |
|
| 596 | extra, extra_loc = arg_r.Peek2()
|
| 597 | if extra is not None:
|
| 598 | raise error.Usage('got extra arg with -a', extra_loc)
|
| 599 |
|
| 600 | # Worst case 20 == len(str(2**64))
|
| 601 | fmt = '%5s %15s %15s %7s %s'
|
| 602 | print(fmt % ('FLAG', 'SOFT', 'HARD', 'FACTOR', 'DESC'))
|
| 603 | for flag, what, factor, desc in self._Table():
|
| 604 | soft, hard = pyos.GetRLimit(what)
|
| 605 |
|
| 606 | soft2 = _LimitString(soft, factor)
|
| 607 | hard2 = _LimitString(hard, factor)
|
| 608 | print(fmt % (flag, soft2, hard2, str(factor), desc))
|
| 609 |
|
| 610 | return 0
|
| 611 |
|
| 612 | if num_what_flags == 0:
|
| 613 | what = RLIMIT_FSIZE # -f is the default
|
| 614 |
|
| 615 | s, s_loc = arg_r.Peek2()
|
| 616 |
|
| 617 | if s is None:
|
| 618 | factor = self._FindFactor(what)
|
| 619 | soft, hard = pyos.GetRLimit(what)
|
| 620 | if arg.H:
|
| 621 | print(_LimitString(hard, factor))
|
| 622 | else:
|
| 623 | print(_LimitString(soft, factor))
|
| 624 | return 0
|
| 625 |
|
| 626 | # Set the given resource
|
| 627 | if s == 'unlimited':
|
| 628 | # In C, RLIM_INFINITY is rlim_t
|
| 629 | limit = mops.FromC(RLIM_INFINITY)
|
| 630 | else:
|
| 631 | if match.LooksLikeInteger(s):
|
| 632 | ok, big_int = mops.FromStr2(s)
|
| 633 | if not ok:
|
| 634 | raise error.Usage('Integer too big: %s' % s, s_loc)
|
| 635 | else:
|
| 636 | raise error.Usage(
|
| 637 | "expected a number or 'unlimited', got %r" % s, s_loc)
|
| 638 |
|
| 639 | if mops.Greater(mops.IntWiden(0), big_int):
|
| 640 | raise error.Usage(
|
| 641 | "doesn't accept negative numbers, got %r" % s, s_loc)
|
| 642 |
|
| 643 | factor = self._FindFactor(what)
|
| 644 |
|
| 645 | fac = mops.IntWiden(factor)
|
| 646 | limit = mops.Mul(big_int, fac)
|
| 647 |
|
| 648 | # Overflow check like bash does
|
| 649 | # TODO: This should be replaced with a different overflow check
|
| 650 | # when we have arbitrary precision integers
|
| 651 | if not mops.Equal(mops.Div(limit, fac), big_int):
|
| 652 | #log('div %s', mops.ToStr(mops.Div(limit, fac)))
|
| 653 | raise error.Usage(
|
| 654 | 'detected integer overflow: %s' % mops.ToStr(big_int),
|
| 655 | s_loc)
|
| 656 |
|
| 657 | arg_r.Next()
|
| 658 | extra2, extra_loc2 = arg_r.Peek2()
|
| 659 | if extra2 is not None:
|
| 660 | raise error.Usage('got extra arg', extra_loc2)
|
| 661 |
|
| 662 | # Now set the resource
|
| 663 | soft, hard = pyos.GetRLimit(what)
|
| 664 |
|
| 665 | # For error message
|
| 666 | old_soft = soft
|
| 667 | old_hard = hard
|
| 668 |
|
| 669 | # Bash behavior: manipulate both, unless a flag is parsed. This
|
| 670 | # differs from zsh!
|
| 671 | if not arg.S and not arg.H:
|
| 672 | soft = limit
|
| 673 | hard = limit
|
| 674 | if arg.S:
|
| 675 | soft = limit
|
| 676 | if arg.H:
|
| 677 | hard = limit
|
| 678 |
|
| 679 | if mylib.PYTHON:
|
| 680 | try:
|
| 681 | pyos.SetRLimit(what, soft, hard)
|
| 682 | except OverflowError: # only happens in CPython
|
| 683 | raise error.Usage('detected overflow', s_loc)
|
| 684 | except (ValueError, resource.error) as e:
|
| 685 | # Annoying: Python binding changes IOError -> ValueError
|
| 686 |
|
| 687 | print_stderr('oils: ulimit error: %s' % e)
|
| 688 |
|
| 689 | # Extra info we could expose in C++ too
|
| 690 | print_stderr('soft=%s hard=%s -> soft=%s hard=%s' % (
|
| 691 | _LimitString(old_soft, factor),
|
| 692 | _LimitString(old_hard, factor),
|
| 693 | _LimitString(soft, factor),
|
| 694 | _LimitString(hard, factor),
|
| 695 | ))
|
| 696 | return 1
|
| 697 | else:
|
| 698 | try:
|
| 699 | pyos.SetRLimit(what, soft, hard)
|
| 700 | except (IOError, OSError) as e:
|
| 701 | print_stderr('oils: ulimit error: %s' % pyutil.strerror(e))
|
| 702 | return 1
|
| 703 |
|
| 704 | return 0
|
| 705 |
|
| 706 |
|
| 707 | def _SigNameToNumber(name):
|
| 708 | # type: (str) -> int
|
| 709 | name = name.upper()
|
| 710 | if name.startswith("SIG"):
|
| 711 | name = name[3:]
|
| 712 | return signal_def.GetNumber(name)
|
| 713 |
|
| 714 |
|
| 715 | class Kill(vm._Builtin):
|
| 716 | """Send a signal to a process"""
|
| 717 |
|
| 718 | def __init__(self, job_list):
|
| 719 | # type: (process.JobList) -> None
|
| 720 | self.job_list = job_list
|
| 721 |
|
| 722 | def _ParseWhat(self, what, blame_loc):
|
| 723 | # type: (str, loc_t) -> int
|
| 724 | if what.startswith("%"):
|
| 725 | job = self.job_list.JobFromSpec(what)
|
| 726 | if job is None:
|
| 727 | e_usage("got invalid job ID %r" % what, blame_loc)
|
| 728 | return job.ProcessGroupId()
|
| 729 | else:
|
| 730 | try:
|
| 731 | pid = int(what)
|
| 732 | except ValueError:
|
| 733 | e_usage("got invalid process ID %r" % what, blame_loc)
|
| 734 | return pid
|
| 735 |
|
| 736 | def _SendSignal(self, arg_r, sig_num):
|
| 737 | # type: (args.Reader, int) -> int
|
| 738 | if arg_r.AtEnd():
|
| 739 | e_usage("expects at least one process/job ID", loc.Missing)
|
| 740 |
|
| 741 | while not arg_r.AtEnd():
|
| 742 | arg_str, arg_loc = arg_r.Peek2()
|
| 743 | pid = self._ParseWhat(arg_str, arg_loc)
|
| 744 |
|
| 745 | posix.kill(pid, sig_num)
|
| 746 | arg_r.Next()
|
| 747 | return 0
|
| 748 |
|
| 749 | def _ParseSignal(self, sig_str, blame_loc):
|
| 750 | # type: (str, loc_t) -> int
|
| 751 | """
|
| 752 | Sigspec can one of these forms:
|
| 753 | 15, TERM, SIGTERM (case insensitive)
|
| 754 | Raises error if sigspec is in invalid format
|
| 755 | """
|
| 756 | if sig_str.isdigit():
|
| 757 | # We don't validate the signal number; we rely on kill() returning
|
| 758 | # EINVAL instead. This is useful for sending unportable signals.
|
| 759 | sig_num = int(sig_str)
|
| 760 | else:
|
| 761 | sig_num = _SigNameToNumber(sig_str)
|
| 762 | if sig_num == signal_def.NO_SIGNAL:
|
| 763 | e_usage("got invalid signal name %r" % sig_str, blame_loc)
|
| 764 | return sig_num
|
| 765 |
|
| 766 | def _TranslateSignal(self, arg, arg_loc):
|
| 767 | # type: (str, loc_t) -> str
|
| 768 | """
|
| 769 | Convert a signal name to a number and vice versa.
|
| 770 | Can also be passed an exit code, which will be converted
|
| 771 | to the name of the signal used to terminate the process.
|
| 772 | """
|
| 773 | if arg.isdigit():
|
| 774 | try:
|
| 775 | sig_num = int(arg)
|
| 776 | except ValueError:
|
| 777 | raise error.Usage("got overflowing integer: %s" % arg,
|
| 778 | arg_loc)
|
| 779 | if sig_num == 0:
|
| 780 | return "EXIT" # special case, this is not really a signal
|
| 781 |
|
| 782 | if sig_num > 128:
|
| 783 | sig_num -= 128 # convert exit codes to signal numbers
|
| 784 |
|
| 785 | sig_name = signal_def.GetName(sig_num)
|
| 786 | if sig_name is None:
|
| 787 | e_usage("can't translate number %r to a name" % arg, arg_loc)
|
| 788 | return sig_name[3:] # strip the SIG prefix
|
| 789 | else:
|
| 790 | sig_num = _SigNameToNumber(arg)
|
| 791 | if sig_num == signal_def.NO_SIGNAL:
|
| 792 | e_usage("can't translate name %r to a number" % arg, arg_loc)
|
| 793 | return str(sig_num)
|
| 794 |
|
| 795 | def _TranslateSignals(self, arg_r):
|
| 796 | # type: (args.Reader) -> None
|
| 797 | while not arg_r.AtEnd():
|
| 798 | arg, arg_loc = arg_r.Peek2()
|
| 799 | print(self._TranslateSignal(arg, arg_loc))
|
| 800 | arg_r.Next()
|
| 801 |
|
| 802 | def Run(self, cmd_val):
|
| 803 | # type: (cmd_value.Argv) -> int
|
| 804 | arg_r = args.Reader(cmd_val.argv, locs=cmd_val.arg_locs)
|
| 805 | arg_r.Next() # skip command name
|
| 806 |
|
| 807 | # Check for a signal argument like -15 -TERM -SIGTERM
|
| 808 | first, first_loc = arg_r.Peek2()
|
| 809 | if first is not None and first.startswith('-'):
|
| 810 | sig_spec = first[1:]
|
| 811 | if sig_spec.isdigit() or len(sig_spec) > 1:
|
| 812 | sig_num = self._ParseSignal(sig_spec, first_loc)
|
| 813 | arg_r.Next() # Skip signal argument
|
| 814 | return self._SendSignal(arg_r, sig_num)
|
| 815 |
|
| 816 | # Note: we're making another args.Reader here
|
| 817 | attrs, arg_r = flag_util.ParseCmdVal('kill',
|
| 818 | cmd_val,
|
| 819 | accept_typed_args=False)
|
| 820 | arg = arg_types.kill(attrs.attrs)
|
| 821 |
|
| 822 | if arg.l or arg.L:
|
| 823 | # If no arg, print all signals
|
| 824 | if arg_r.AtEnd():
|
| 825 | PrintSignals()
|
| 826 | return 0
|
| 827 |
|
| 828 | # Otherwise translate each arg
|
| 829 | self._TranslateSignals(arg_r)
|
| 830 | return 0
|
| 831 |
|
| 832 | # -n and -s are synonyms.
|
| 833 | # TODO: it would be nice if the flag parser could expose the location
|
| 834 | # of 'foo' in -s foo
|
| 835 | sig_num = 15 # SIGTERM, the default signal to send
|
| 836 | blame_loc = cmd_val.arg_locs[0]
|
| 837 | if arg.n is not None:
|
| 838 | sig_num = self._ParseSignal(arg.n, blame_loc)
|
| 839 | if arg.s is not None:
|
| 840 | sig_num = self._ParseSignal(arg.s, blame_loc)
|
| 841 |
|
| 842 | return self._SendSignal(arg_r, sig_num)
|
| 843 |
|
| 844 |
|
| 845 | # vim: sw=4
|