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author | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 05:00:24 +0000 |
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committer | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 05:00:24 +0000 |
commit | be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da (patch) | |
tree | a18a706dffa5baf86a3b12bbfb4f81caa097f349 /lib/libc/gen/alarm.3 | |
parent | 2a27bd86e6002c871e3b5561a5334653bb222a77 (diff) | |
download | FreeBSD-src-be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da.zip FreeBSD-src-be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da.tar.gz |
BSD 4.4 Lite Lib Sources
Diffstat (limited to 'lib/libc/gen/alarm.3')
-rw-r--r-- | lib/libc/gen/alarm.3 | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/lib/libc/gen/alarm.3 b/lib/libc/gen/alarm.3 new file mode 100644 index 0000000..fb1893f --- /dev/null +++ b/lib/libc/gen/alarm.3 @@ -0,0 +1,86 @@ +.\" Copyright (c) 1980, 1991, 1993, 1994 +.\" 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. +.\" +.\" @(#)alarm.3 8.2 (Berkeley) 4/19/94 +.\" +.Dd April 19, 1994 +.Dt ALARM 3 +.Os BSD 4 +.Sh NAME +.Nm alarm +.Nd set signal timer alarm +.Sh SYNOPSIS +.Fd #include <unistd.h> +.Ft u_int +.Fn alarm "u_int seconds" +.Sh DESCRIPTION +.Bf -symbolic +This interface is made obsolete by setitimer(2). +.Ef +.Pp +The +.Fn alarm +function +waits a count of +.Ar seconds +before asserting the terminating signal +.Dv SIGALRM . +When the signal has successfully been caught, +.Fn alarm +returns the amount of time left on the clock. +The maximum number of +.Ar seconds +allowed +is 2147483647. +.Pp +If an alarm has been set with +.Fn alarm , +another call to +.Fn alarm +will supersede the prior call. +The request +.Fn alarm "0" +voids the current +alarm. +.Sh SEE ALSO +.Xr sigaction 2 , +.Xr setitimer 2 , +.Xr sigpause 2 , +.Xr sigvec 2 , +.Xr signal 3 , +.Xr sleep 3 , +.Xr ualarm 3 , +.Xr usleep 3 +.Sh HISTORY +An +.Fn alarm +function appeared in +.At v7 . |