The Linux Programming Interface: a linux and unix system Programming Handbook
tải về 6.93 Mb. Chế độ xem pdf
|
| 21
SIGNALS: SIGNAL HANDLERS 421 21.1 Designing Signal Handlers ......................................................................................... 422 21.1.1 Signals Are Not Queued (Revisited) ........................................................ 422 21.1.2 Reentrant and Async-Signal-Safe Functions ............................................... 422 21.1.3 Global Variables and the sig_atomic_t Data Type ..................................... 428 21.2 Other Methods of Terminating a Signal Handler ........................................................... 428 21.2.1 Performing a Nonlocal Goto from a Signal Handler.................................. 429 21.2.2 Terminating a Process Abnormally: abort() ............................................... 433 21.3 Handling a Signal on an Alternate Stack: sigaltstack() ................................................... 434 21.4 The SA_SIGINFO Flag................................................................................................... 437 21.5 Interruption and Restarting of System Calls ................................................................... 442 21.6 Summary.................................................................................................................. 445 21.7 Exercise ................................................................................................................... 446 22 SIGNALS: ADVANCED FEATURES 447 22.1 Core Dump Files ....................................................................................................... 448 22.2 Special Cases for Delivery, Disposition, and Handling ................................................... 450 22.3 Interruptible and Uninterruptible Process Sleep States..................................................... 451 22.4 Hardware-Generated Signals...................................................................................... 452 22.5 Synchronous and Asynchronous Signal Generation ....................................................... 452 Contents in Detail xvii 22.6 Timing and Order of Signal Delivery ........................................................................... 453 22.7 Implementation and Portability of signal() ..................................................................... 454 22.8 Realtime Signals........................................................................................................ 456 22.8.1 Sending Realtime Signals....................................................................... 458 22.8.2 Handling Realtime Signals ..................................................................... 460 22.9 Waiting for a Signal Using a Mask: sigsuspend() .......................................................... 464 22.10 Synchronously Waiting for a Signal............................................................................. 468 22.11 Fetching Signals via a File Descriptor........................................................................... 471 22.12 Interprocess Communication with Signals ..................................................................... 474 22.13 Earlier Signal APIs (System V and BSD) ........................................................................ 475 22.14 Summary.................................................................................................................. 477 22.15 Exercises .................................................................................................................. 478 tải về 6.93 Mb. Chia sẻ với bạn bè của bạn:
|