projects / apple / libc.git / blame
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1 | .\" Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>. |
| 2 | .\" All rights reserved. | |
| 3 | .\" | |
| 4 | .\" Redistribution and use in source and binary forms, with or without | |
| 5 | .\" modification, are permitted provided that the following conditions | |
| 6 | .\" are met: | |
| 7 | .\" 1. Redistributions of source code must retain the above copyright | |
| 8 | .\" notice(s), this list of conditions and the following disclaimer as | |
| 9 | .\" the first lines of this file unmodified other than the possible | |
| 10 | .\" addition of one or more copyright notices. | |
| 11 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
| 12 | .\" notice(s), this list of conditions and the following disclaimer in | |
| 13 | .\" the documentation and/or other materials provided with the | |
| 14 | .\" distribution. | |
| 15 | .\" | |
| 16 | .\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY | |
| 17 | .\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 19 | .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE | |
| 20 | .\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 | .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 | .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
| 23 | .\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
| 24 | .\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE | |
| 25 | .\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |
| 26 | .\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | .\" | |
| 28 | .\" $FreeBSD: src/lib/libc_r/man/pthread_sigmask.3,v 1.9 2001/10/01 16:09:09 ru Exp $ | |
| 29 | .Dd April 27, 2000 | |
| 30 | .Dt PTHREAD_SIGMASK 2 | |
| 31 | .Os | |
| 32 | .Sh NAME | |
| 33 | .Nm pthread_sigmask | |
| 34 | .Nd examine and/or change a thread's signal mask | |
| 35 | .Sh SYNOPSIS | |
| 36 | .In pthread.h | |
| 37 | .In signal.h | |
| 38 | .Ft int | |
| 39 | .Fn pthread_sigmask "int how" "const sigset_t *set" "sigset_t *oset" | |
| 40 | .Sh DESCRIPTION | |
| 41 | The | |
| 42 | .Fn pthread_sigmask | |
| 43 | function examines and/or changes the calling thread's signal mask. | |
| 44 | .Pp | |
| 45 | If | |
| 46 | .Fa set | |
| 47 | is not | |
| 48 | .Dv NULL , | |
| 49 | it specifies a set of signals to be modified, and | |
| 50 | .Fa how | |
| 51 | specifies what to set the signal mask to: | |
| 52 | .Bl -tag -width SIG_UNBLOCK | |
| 53 | .It Dv SIG_BLOCK | |
| 54 | Union of the current mask and | |
| 55 | .Fa set . | |
| 56 | .It Dv SIG_UNBLOCK | |
| 57 | Intersection of the current mask and the complement of | |
| 58 | .Fa set . | |
| 59 | .It Dv SIG_SETMASK | |
| 60 | .Fa set . | |
| 61 | .El | |
| 62 | .Pp | |
| 63 | If | |
| 64 | .Fa oset | |
| 65 | is not NULL, the previous signal mask is stored in the location pointed to by | |
| 66 | .Fa oset . | |
| 67 | .Pp | |
| 68 | .Dv SIGKILL | |
| 69 | and | |
| 70 | .Dv SIGSTOP | |
| 71 | cannot be blocked, and will be silently ignored if included in the signal mask. | |
| 72 | .Sh RETURN VALUES | |
| 73 | If successful, | |
| 74 | .Fn pthread_sigmask | |
| 75 | returns 0. | |
| 76 | Otherwise, an error is returned. | |
| 77 | .Sh ERRORS | |
| 78 | .Fn pthread_sigmask | |
| 79 | will fail if: | |
| 80 | .Bl -tag -width Er | |
| 81 | .It Bq Er EINVAL | |
| 82 | .Fa how | |
| 83 | is not one of the defined values. | |
| 84 | .El | |
| 85 | .Sh SEE ALSO | |
| 86 | .Xr sigaction 2 , | |
| 87 | .Xr sigpending 2 , | |
| 88 | .Xr sigprocmask 2 , | |
| 89 | .Xr sigsuspend 2 , | |
| 90 | .Xr sigsetops 3 | |
| 91 | .Sh STANDARDS | |
| 92 | .Fn pthread_sigmask | |
| 93 | conforms to ISO/IEC 9945-1:1996 (``POSIX.1'') |