| alarm.3 (17222) | alarm.3 (17226) |
|---|---|
| 1.\" Copyright (c) 1980, 1991, 1993, 1994 2.\" The Regents of the University of California. 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, this list of conditions and the following disclaimer. --- 25 unchanged lines hidden (view full) --- 34.Dd April 19, 1994 35.Dt ALARM 3 36.Os BSD 4 37.Sh NAME 38.Nm alarm 39.Nd set signal timer alarm 40.Sh SYNOPSIS 41.Fd #include <unistd.h> | 1.\" Copyright (c) 1980, 1991, 1993, 1994 2.\" The Regents of the University of California. 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, this list of conditions and the following disclaimer. --- 25 unchanged lines hidden (view full) --- 34.Dd April 19, 1994 35.Dt ALARM 3 36.Os BSD 4 37.Sh NAME 38.Nm alarm 39.Nd set signal timer alarm 40.Sh SYNOPSIS 41.Fd #include <unistd.h> |
| 42.Ft u_int 43.Fn alarm "u_int seconds" | 42.Ft unsigned int 43.Fn alarm "unsigned int seconds" |
| 44.Sh DESCRIPTION 45.Bf -symbolic 46This interface is made obsolete by setitimer(2). 47.Ef 48.Pp 49The 50.Fn alarm | 44.Sh DESCRIPTION 45.Bf -symbolic 46This interface is made obsolete by setitimer(2). 47.Ef 48.Pp 49The 50.Fn alarm |
| 51function 52waits a count of 53.Ar seconds 54before asserting the terminating signal 55.Dv SIGALRM . | 51function sets a timer to deliver the signal 52.Dv SIGALRM 53to the calling process after the specified number of 54.Fa seconds . 55If an alarm has already been set with 56.Fn alarm 57but has not been delivered, another call to |
| 56.Fn alarm | 58.Fn alarm |
| 57returns the amount of time unexpired 58from any previously pending alarm. 59The maximum number of | 59will supersede the prior call. 60The request 61.Fn alarm "0" 62voids the current 63alarm and the signal SIGALRM will not be delivered. The maximum number of |
| 60.Ar seconds 61allowed 62is 2147483647. 63.Pp | 64.Ar seconds 65allowed 66is 2147483647. 67.Pp |
| 64If an alarm has been set with 65.Fn alarm , 66another call to | 68The return value of |
| 67.Fn alarm | 69.Fn alarm |
| 68will supersede the prior call. 69The request 70.Fn alarm "0" 71voids the current 72alarm. | 70is the amount of time left on the timer from a previous call to 71.Fn alarm . 72If no alarm is currently set, the return value is 0. |
| 73.Sh SEE ALSO 74.Xr sigaction 2 , 75.Xr setitimer 2 , 76.Xr sigpause 2 , | 73.Sh SEE ALSO 74.Xr sigaction 2 , 75.Xr setitimer 2 , 76.Xr sigpause 2 , |
| 77.Xr sigvec 2 , | 77.Xr sigvec 3 , |
| 78.Xr signal 3 , 79.Xr sleep 3 , 80.Xr ualarm 3 , 81.Xr usleep 3 | 78.Xr signal 3 , 79.Xr sleep 3 , 80.Xr ualarm 3 , 81.Xr usleep 3 |
| 82.Sh STANDARDS 83The 84.Fn alarm 85function conforms to 86.St -p1003.1-90 . |
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| 82.Sh HISTORY 83An 84.Fn alarm 85function appeared in 86.At v7 . | 87.Sh HISTORY 88An 89.Fn alarm 90function appeared in 91.At v7 . |