diff options
Diffstat (limited to 'lib/libc/gen/siginterrupt.3')
-rw-r--r-- | lib/libc/gen/siginterrupt.3 | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/lib/libc/gen/siginterrupt.3 b/lib/libc/gen/siginterrupt.3 deleted file mode 100644 index 6693b79..0000000 --- a/lib/libc/gen/siginterrupt.3 +++ /dev/null @@ -1,111 +0,0 @@ -.\" Copyright (c) 1985, 1991, 1993 -.\" The Regents of the University of California. All rights reserved. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" 3. All advertising materials mentioning features or use of this software -.\" must display the following acknowledgement: -.\" This product includes software developed by the University of -.\" California, Berkeley and its contributors. -.\" 4. Neither the name of the University nor the names of its contributors -.\" may be used to endorse or promote products derived from this software -.\" without specific prior written permission. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" @(#)siginterrupt.3 8.1 (Berkeley) 6/4/93 -.\" -.Dd June 4, 1993 -.Dt SIGINTERRUPT 3 -.Os BSD 4.3 -.Sh NAME -.Nm siginterrupt -.Nd allow signals to interrupt system calls -.Sh SYNOPSIS -.Fd #include <signal.h> -.Ft int -.Fn siginterrupt "int sig" "int flag" -.Sh DESCRIPTION -The -.Fn siginterrupt -function -is used to change the system call restart -behavior when a system call is interrupted by the specified signal. -If the flag is false (0), then system calls will be restarted if -they are interrupted by the specified signal -and no data has been transferred yet. -System call restart has been the default behavior since -.Bx 4.2 , -and is the default behaviour for -.Xr signal 3 -on -.Tn FreeBSD . -.Pp -If the flag is true (1), -then restarting of system calls is disabled. -If a system call is interrupted by the specified signal -and no data has been transferred, -the system call will return \-1 with the global variable -.Va errno -set to -.Dv EINTR . -Interrupted system calls that have started transferring -data will return the amount of data actually transferred. -System call interrupt is the signal behavior found on -.Bx 4.1 -and -.At V -systems. -.Pp -Note that the new -.Bx 4.2 -signal handling semantics are not -altered in any other way. -Most notably, signal handlers always remain installed until -explicitly changed by a subsequent -.Xr sigaction 2 -call, and the signal mask operates as documented in -.Xr sigaction 2 . -Programs may switch between restartable and interruptible -system call operation as often as desired in the execution of a program. -.Pp -Issuing a -.Fn siginterrupt 3 -call during the execution of a signal handler will cause -the new action to take place on the next signal to be caught. -.Sh NOTES -This library routine uses an extension of the -.Xr sigaction 2 -system call that is not available in -.Bx 4.2 , -hence it should not be used if backward compatibility is needed. -.Sh RETURN VALUES -A 0 value indicates that the call succeeded. -A \-1 value indicates that an invalid signal number has been supplied. -.Sh SEE ALSO -.Xr sigaction 2 , -.Xr sigblock 2 , -.Xr sigpause 2 , -.Xr sigsetmask 2 , -.Xr signal 3 -.Sh HISTORY -The -.Fn siginterrupt -function appeared in -.Bx 4.3 . |