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Homework and Emergencies Emergency UNIX and Linux Support How to open the core dump file in linux? Post 302580235 by otheus on Thursday 8th of December 2011 02:10:05 AM
Old 12-08-2011
From man core(5):

You can send a process (via the kill command) any of the signals whose corresponding action is "core" listed in that man page. This includes:
SIGQUIT, SIGILL, SIGABRT, SIGFPE, SIGSEGV, SIGBUS, SIGSYS, SIGTRAP, SIGXCPU, SIGXFSZ, SIGIOT,

The catch is that (1) a process can choose to ignore these signals or handle them without doing a core dump, and (2) the parent shell can limit the core dump through ulimit or other commands.


Quote:
Up to and including Linux 2.2, the default behaviour for SIGSYS, SIGXCPU, SIGXFSZ, and (on architectures other than SPARC and MIPS) SIGBUS was to terminate the process (without a core dump). (On some other Unices the default action for SIGXCPU and SIGXFSZ is to terminate the process without a core dump.) Linux 2.4 conforms to the POSIX.1-2001 requirements for these signals, terminating the process with a core dump.
 

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pthread_kill(3) 					     Library Functions Manual						   pthread_kill(3)

NAME
pthread_kill - Delivers a signal to a specified thread. (This routine is available only on a UNIX system.) LIBRARY
DECthreads POSIX 1003.1c Library (libpthread.so) SYNOPSIS
#include <pthread.h> #include <signal.h> int pthread_kill( pthread_t thread, int sig); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: IEEE Std 1003.1c-1995, POSIX System Application Program Interface PARAMETERS
Thread to receive a signal request. A signal request. DESCRIPTION
This routine sends a signal to the specified target thread thread. Any signal defined to stop, continue, or terminate will stop or termi- nate the process, even though it can be handled by the thread. For example, SIGTERM terminates all threads in the process, even though it can be handled by the target thread. Specifying a sig argument of zero (0) causes this routine to validate the thread argument but not to deliver any signal. The name of the "kill" routine is sometimes misleading, because many signals do not terminate a thread. The various signals are as follows: SIGHUP, SIGPIPE, SIGTTIN SIGINT, SIGALRM, SIGTTOU SIGQUIT, SIGTERM, SIGIO SIGTRAP, SIGUSR1, SIGXCPU SIGABRT, SIGSYS, SIGXFSZ SIGEMT, SIGURG, SIGVTALRM SIGFPE, SIGSTOP, SIGPROF SIGKILL, SIGTSTP, SIGINFO SIGBUS, SIGCONT, SIGUSR1 SIGSEGV, SIGCHLD, SIGUSR2 If this routine does not execute successfully, no signal is sent. RETURN VALUES
If an error condition occurs, this routine returns an integer value indicating the type of error. Possible return values are as follows: Successful completion. The value of sig is invalid or unsupported signal value. The value of thread does not specify an existing thread. ERRORS
None RELATED INFORMATION
Manuals: Guide to DECthreads and Programmer's Guide delim off pthread_kill(3)
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