07-29-2009
You should not use old-style signal() handling together with sigprocmask(); the latter is part of a new set of functions that eclipse signal() entirely. sigaction() is the modern equivalent. It can be told to keep receiving a signal instead of needing to be reset every time. You shouldn't need to change the signal mask, I think, unless you need to block a signal, it should let them through by default.
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LEARN ABOUT DEBIAN
pthread_kill
PTHREAD_KILL(3) Linux Programmer's Manual PTHREAD_KILL(3)
NAME
pthread_kill - send a signal to a thread
SYNOPSIS
#include <signal.h>
int pthread_kill(pthread_t thread, int sig);
Compile and link with -pthread.
DESCRIPTION
The pthread_kill() function sends the signal sig to thread, a thread in the same process as the caller. The signal is asynchronously
directed to thread.
If sig is 0, then no signal is sent, but error checking is still performed; this can be used to check for the existence of a thread ID.
RETURN VALUE
On success, pthread_kill() returns 0; on error, it returns an error number, and no signal is sent.
ERRORS
EINVAL An invalid signal was specified.
ESRCH No thread with the ID thread could be found.
CONFORMING TO
POSIX.1-2001.
NOTES
Signal dispositions are process-wide: if a signal handler is installed, the handler will be invoked in the thread thread, but if the dispo-
sition of the signal is "stop", "continue", or "terminate", this action will affect the whole process.
SEE ALSO
kill(2), sigaction(2), sigpending(2), pthread_self(3), pthread_sigmask(3), raise(3), pthreads(7), signal(7)
COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-08-19 PTHREAD_KILL(3)