sigprocmask man page on YellowDog

Man page or keyword search:  
man Server   18644 pages
apropos Keyword Search (all sections)
Output format
YellowDog logo
[printable version]

SIGPROCMASK(2)		   Linux Programmer's Manual		SIGPROCMASK(2)

NAME
       sigprocmask - examine and change blocked signals

SYNOPSIS
       #include <signal.h>

       int sigprocmask(int how, const sigset_t *set, sigset_t *oldset);

DESCRIPTION
       sigprocmask()  is  used to change the signal mask, the set of currently
       blocked signals.	 The behaviour of the call is dependent on  the	 value
       of how, as follows.

	      SIG_BLOCK
		     The  set  of  blocked signals is the union of the current
		     set and the set argument.

	      SIG_UNBLOCK
		     The signals in set are removed from the  current  set  of
		     blocked  signals.	 It  is	 legal to attempt to unblock a
		     signal which is not blocked.

	      SIG_SETMASK
		     The set of blocked signals is set to the argument set.

       If oldset is non-null, the previous value of the signal mask is	stored
       in oldset.

       If  set	is  NULL,  then	 the  signal  mask  is unchanged (i.e., how is
       ignored), but the current value of  the	signal	mask  is  nevertheless
       returned in oldset (it is not NULL).

       The use of sigprocmask() is unspecified in a multithreaded process; see
       pthread_sigmask(3).

RETURN VALUE
       sigprocmask() returns 0 on success and -1 on error.

ERRORS
       EINVAL The value specified in how was invalid.

NOTES
       It is not possible to block SIGKILL or SIGSTOP.	Attempts to do so  are
       silently ignored.

       If  SIGBUS,  SIGFPE,  SIGILL,  or  SIGSEGV are generated while they are
       blocked, the result is undefined, unless the signal  was	 generated  by
       the kill(2), sigqueue(2), or raise(3).

       See sigsetops(3) for details on manipulating signal sets.

CONFORMING TO
       POSIX.1-2001.

SEE ALSO
       kill(2),	 pause(2),  sigaction(2),  signal(2),  sigpending(2), sigproc‐
       mask(2), sigqueue(2), sigsuspend(2), pthread_sigmask(3),	 sigsetops(3),
       signal(7)

Linux 2.6.13			  2005-09-15			SIGPROCMASK(2)
[top]

List of man pages available for YellowDog

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net