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| 1 | .TH INTR 8
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| 2 | .SH NAME
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| 3 | intr \- run a command with interrupts enabled
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| 4 | .SH SYNOPSIS
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| 5 | .B intr
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| 6 | .RB [ \-d ]
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| 7 | .RB [ \-t
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| 8 | .IR seconds ]
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| 9 | .I command
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| 10 | .RI [arg "...]"
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| 11 | .SH DESCRIPTION
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| 12 | .B Intr
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| 13 | executes a command with keyboard interrupts enabled, and standard input,
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| 14 | output and error redirected to the terminal or the console. It may also
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| 15 | be used for the opposite: to detach a process from the terminal.
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| 16 | .PP
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| 17 | There are three situations where intr may be used: From a process that has
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| 18 | no controlling tty, like the shell running
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| 19 | .B /etc/rc
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| 20 | at boot time, from a script that runs in the background, or by the System
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| 21 | Administrator to restart a daemon.
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| 22 | .PP
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| 23 | In the first case
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| 24 | .B intr
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| 25 | will use
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| 26 | .B /dev/console
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| 27 | as a controlling tty and as standard input, output and error. In the
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| 28 | second case
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| 29 | .B intr
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| 30 | will use
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| 31 | .B /dev/tty
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| 32 | to connect the command to the controlling tty. In the third case the
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| 33 | process will be removed from the process group, and will have I/O redirected
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| 34 | to
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| 35 | .B /dev/null
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| 36 | as input, and
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| 37 | .B /dev/log
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| 38 | for output.
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| 39 | .SH OPTIONS
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| 40 | .TP
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| 41 | .B \-d
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| 42 | Daemonize a process instead of bringing it to the foreground. Don't forget
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| 43 | to use '&' to make the shell not wait for the process, because you won't be
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| 44 | able to kill it with the interrupt key.
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| 45 | .TP
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| 46 | .BI \-t " seconds"
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| 47 | Schedule an alarm to kill the process in the given number of seconds.
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| 48 | Use it for a process that may wait indefinitely for a service that may
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| 49 | not be available.
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| 50 | .SH FILES
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| 51 | .TP 20
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| 52 | .B /dev/console
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| 53 | Main computer console.
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| 54 | .TP
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| 55 | .B /dev/log
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| 56 | Message logging device.
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| 57 | .TP
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| 58 | .B /dev/tty
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| 59 | Name for the controlling tty.
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| 60 | .SH "SEE ALSO"
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| 61 | .BR boot (8),
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| 62 | .BR tty (4),
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| 63 | .BR setsid (2),
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| 64 | .BR alarm (2).
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| 65 | .SH BUGS
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| 66 | Maybe
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| 67 | .B intr \-d
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| 68 | should fork to daemonize a process, but the author likes it if the process
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| 69 | stays in the jobs list of his shell.
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| 70 | .SH AUTHOR
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| 71 | Kees J. Bot (kjb@cs.vu.nl)
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