Signal - Revision history

Pbug: clarification

2008-05-24T09:01:35Z

clarification

← Older revision		Revision as of 02:01, 24 May 2008
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	29) SIGIO 30) SIGPWR 31) SIGSYS		29) SIGIO 30) SIGPWR 31) SIGSYS

	Here are the common signals:		Here are the common signals (taken from a BSD, notice the difference from the signals above):

	#define SIGHUP 1 /* hangup */		#define SIGHUP 1 /* hangup */

Franks: removed the number for SIGSTOP, as appears to be different on Linux vs BSD

2006-09-19T22:31:08Z

removed the number for SIGSTOP, as appears to be different on Linux vs BSD

← Older revision		Revision as of 15:31, 19 September 2006
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	#define SIGUSR2 31 /* user defined signal 2 */		#define SIGUSR2 31 /* user defined signal 2 */

	Programs can set up "signal handlers" (traps) to execute a set of instructions after receiving the signal or to ignore signals. Of all signals SIGKILL (9) and SIGSTOP ~~(17)~~ cannot be handled or ignored.		Programs can set up "signal handlers" (traps) to execute a set of instructions after receiving the signal or to ignore signals. Of all signals SIGKILL (9) and SIGSTOP cannot be handled or ignored.

Pbug: put the order right for signals KILL 0x9 and STOP 0x11, only if your perception is from the bottom up.

2006-09-14T09:17:21Z

put the order right for signals KILL 0x9 and STOP 0x11, only if your perception is from the bottom up.

← Older revision		Revision as of 02:17, 14 September 2006
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	#define SIGUSR2 31 /* user defined signal 2 */		#define SIGUSR2 31 /* user defined signal 2 */

	Programs can set up "signal handlers" (traps) to execute a set of instructions after receiving the signal or to ignore signals. Of all signals ~~SIGSTOP~~ (17) and ~~SIGKILL~~ (9) cannot be handled or ignored.		Programs can set up "signal handlers" (traps) to execute a set of instructions after receiving the signal or to ignore signals. Of all signals SIGKILL (9) and SIGSTOP (17) cannot be handled or ignored.

Hawson: added kill -l

2006-09-14T02:47:16Z

added kill -l

← Older revision		Revision as of 19:47, 13 September 2006
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	$ find /usr/include -name signal.h -print		$ find /usr/include -name signal.h -print

			or run kill(1) (output from a Linux 2.6 system):

			$ kill -l
			1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL
			5) SIGTRAP 6) SIGABRT 7) SIGBUS 8) SIGFPE
			9) SIGKILL 10) SIGUSR1 11) SIGSEGV 12) SIGUSR2
			13) SIGPIPE 14) SIGALRM 15) SIGTERM 16) SIGSTKFLT
			17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP
			21) SIGTTIN 22) SIGTTOU 23) SIGURG 24) SIGXCPU
			25) SIGXFSZ 26) SIGVTALRM 27) SIGPROF 28) SIGWINCH
			29) SIGIO 30) SIGPWR 31) SIGSYS

	Here are the common signals:		Here are the common signals:

Franks: remove openbsd specific mention

2006-09-14T01:21:20Z

remove openbsd specific mention

← Older revision		Revision as of 18:21, 13 September 2006
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	Signals have a unique number or name. Either can be passed to a [[process]] by means of the kill(1) command. ~~In [[OpenBSD]]~~ the ~~signals are defined in ''~~/usr/include~~/sys/~~signal.h''		Signals have a unique number or name. Either can be passed to a [[process]] by means of the kill(1) command.
			$ man 7 signal

			or to look for the file directly:

			$ find /usr/include -name signal.h -print

			Here are the common signals:

	#define SIGHUP 1 /* hangup */		#define SIGHUP 1 /* hangup */

Pbug at 13:16, 7 October 2005

2005-10-07T13:16:13Z

← Older revision		Revision as of 06:16, 7 October 2005
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	Signals have a unique number or name. Either can be passed to a process by means of the kill(1) command. In [[OpenBSD]] the signals are defined in ''/usr/include/sys/signal.h''		Signals have a unique number or name. Either can be passed to a [[process]] by means of the kill(1) command. In [[OpenBSD]] the signals are defined in ''/usr/include/sys/signal.h''

	#define SIGHUP 1 /* hangup */		#define SIGHUP 1 /* hangup */
Line 39:		Line 39:
	#define SIGUSR1 30 /* user defined signal 1 */		#define SIGUSR1 30 /* user defined signal 1 */
	#define SIGUSR2 31 /* user defined signal 2 */		#define SIGUSR2 31 /* user defined signal 2 */

			Programs can set up "signal handlers" (traps) to execute a set of instructions after receiving the signal or to ignore signals. Of all signals SIGSTOP (17) and SIGKILL (9) cannot be handled or ignored.

Pbug at 13:13, 7 October 2005

2005-10-07T13:13:11Z

New page

Signals have a unique number or name. Either can be passed to a process by means of the kill(1) command. In [[OpenBSD]] the signals are defined in ''/usr/include/sys/signal.h''

#define SIGHUP 1 /* hangup */
#define SIGINT 2 /* interrupt */
#define SIGQUIT 3 /* quit */
#define SIGILL 4 /* illegal instruction (not reset when caught) */
#define SIGTRAP 5 /* trace trap (not reset when caught) */
#define SIGABRT 6 /* abort() */
#ifndef _POSIX_SOURCE
#define SIGIOT SIGABRT /* compatibility */
#define SIGEMT 7 /* EMT instruction */
#endif
#define SIGFPE 8 /* floating point exception */
#define SIGKILL 9 /* kill (cannot be caught or ignored) */
#define SIGBUS 10 /* bus error */
#define SIGSEGV 11 /* segmentation violation */
#define SIGSYS 12 /* bad argument to system call */
#define SIGPIPE 13 /* write on a pipe with no one to read it */
#define SIGALRM 14 /* alarm clock */
#define SIGTERM 15 /* software termination signal from kill */
#define SIGURG 16 /* urgent condition on IO channel */
#define SIGSTOP 17 /* sendable stop signal not from tty */
#define SIGTSTP 18 /* stop signal from tty */
#define SIGCONT 19 /* continue a stopped process */
#define SIGCHLD 20 /* to parent on child stop or exit */
#define SIGTTIN 21 /* to readers pgrp upon background tty read */
#define SIGTTOU 22 /* like TTIN for output if (tp->t_local&LTOSTOP) */
#ifndef _POSIX_SOURCE
#define SIGIO 23 /* input/output possible signal */
#endif
#define SIGXCPU 24 /* exceeded CPU time limit */
#define SIGXFSZ 25 /* exceeded file size limit */
#define SIGVTALRM 26 /* virtual time alarm */
#define SIGPROF 27 /* profiling time alarm */
#ifndef _POSIX_SOURCE
#define SIGWINCH 28 /* window size changes */
#define SIGINFO 29 /* information request */
#endif
#define SIGUSR1 30 /* user defined signal 1 */
#define SIGUSR2 31 /* user defined signal 2 */