SIGPROCM.2
上传用户:jnzhq888
上传日期:2007-01-18
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文件大小:1k
- .TH SIGPROCMASK 2
- .SH NAME
- sigprocmask - manipulate the signal mask
- .SH SYNOPSIS
- .ft B
- #include <signal.h>
- int sigprocmask(int fIhowfP, const sigset_t *fIsetfP, sigset_t *fIosetfP)
- .ft P
- .SH DESCRIPTION
- .B Sigprocmask()
- examines or manipulates the signal mask. This mask is the set of signals
- that are currently blocked. The
- .I how
- argument determines the action that must be performed. In all cases the
- signal set referenced by
- .IR oset ,
- if not
- .BR NULL ,
- will be used to receive the old signal mask. The
- .I set
- argument, if not
- .BR NULL ,
- will be used to set or modify the current signal mask.
- .PP
- .I How
- can be one of:
- .PP
- .TP 15
- .B SIG_BLOCK
- Add the signals referenced by
- .I set
- to the mask.
- .TP
- .B SIG_UNBLOCK
- Remove the signals referenced by
- .I set
- from the mask.
- .TP
- .B SIG_SETMASK
- Set the signal mask to the set referenced by
- .IR set .
- .PP
- The value of
- .I how
- is ignored if
- .I set
- is
- .BR NULL .
- .SH "SEE ALSO"
- .BR sigaction (2),
- .BR sigpending (2),
- .BR sigsuspend (2),
- .BR sigset (3).
- .SH DIAGNOSTICS
- Returns
- .B 0
- on success and
- .B -1
- on error. The error code is
- .B EFAULT
- for a bad
- .I set
- or
- .I oset
- address, or
- .B EINVAL
- for a bad
- .I how
- argument.
- .SH AUTHOR
- Kees J. Bot (kjb@cs.vu.nl)