projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| d35f9a62 KM |
1 | .\" Copyright (c) 1983 Regents of the University of California. |
| 2 | .\" All rights reserved. The Berkeley software License Agreement | |
| 3 | .\" specifies the terms and conditions for redistribution. | |
| 4 | .\" | |
| fa6ed5be | 5 | .\" @(#)sigblock.2 6.2 (Berkeley) %G% |
| d35f9a62 | 6 | .\" |
| 19165f3e | 7 | .TH SIGBLOCK 2 "" |
| d35f9a62 KM |
8 | .UC 5 |
| 9 | .SH NAME | |
| 10 | sigblock \- block signals | |
| 11 | .SH SYNOPSIS | |
| 12 | .nf | |
| fa6ed5be MK |
13 | .B #include <signal.h> |
| 14 | ||
| d35f9a62 KM |
15 | .B sigblock(mask); |
| 16 | .B int mask; | |
| fa6ed5be MK |
17 | |
| 18 | .B mask = sigmask(signum) | |
| d35f9a62 KM |
19 | .SH DESCRIPTION |
| 20 | .I Sigblock | |
| 21 | causes the signals specified in | |
| 22 | .I mask | |
| 23 | to be added to the set of signals currently | |
| fa6ed5be MK |
24 | being blocked from delivery. |
| 25 | Signals are blocked if the | |
| 26 | corresding bit in | |
| d35f9a62 | 27 | .I mask |
| fa6ed5be MK |
28 | is a 1; the macro |
| 29 | .I sigmask | |
| 30 | is provided to construct the mask for a given | |
| 31 | .IR signum . | |
| d35f9a62 KM |
32 | .PP |
| 33 | It is not possible to block SIGKILL, | |
| 34 | SIGSTOP, or SIGCONT; this restriction is silently | |
| 35 | imposed by the system. | |
| 36 | .SH "RETURN VALUE | |
| 37 | The previous set of masked signals is returned. | |
| 38 | .SH "SEE ALSO" | |
| fa6ed5be | 39 | kill(2), sigvec(2), sigsetmask(2) |