diff options
Diffstat (limited to 'bin/sleep')
| -rw-r--r-- | bin/sleep/Makefile | 5 | ||||
| -rw-r--r-- | bin/sleep/sleep.1 | 116 | ||||
| -rw-r--r-- | bin/sleep/sleep.c | 80 |
3 files changed, 201 insertions, 0 deletions
diff --git a/bin/sleep/Makefile b/bin/sleep/Makefile new file mode 100644 index 000000000000..c31f19c5afa5 --- /dev/null +++ b/bin/sleep/Makefile @@ -0,0 +1,5 @@ +# @(#)Makefile 8.1 (Berkeley) 5/31/93 + +PROG= sleep + +.include <bsd.prog.mk> diff --git a/bin/sleep/sleep.1 b/bin/sleep/sleep.1 new file mode 100644 index 000000000000..2148b7a5172d --- /dev/null +++ b/bin/sleep/sleep.1 @@ -0,0 +1,116 @@ +.\" Copyright (c) 1990, 1993, 1994 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" the Institute of Electrical and Electronics Engineers, Inc. +.\" +.\" 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. +.\" +.\" @(#)sleep.1 8.3 (Berkeley) 4/18/94 +.\" +.Dd April 18, 1994 +.Dt SLEEP 1 +.Os +.Sh NAME +.Nm sleep +.Nd suspend execution for an interval of time +.Sh SYNOPSIS +.Nm sleep +.Ar seconds +.Sh DESCRIPTION +The +.Nm sleep +command +suspends execution for a minimum of +.Ar seconds . +.Nm Sleep +is used to schedule the execution of other commands (see +.Sx EXAMPLES +below). +.Pp +The +.Nm Sleep +utility exits with one of the following values: +.Bl -tag -width flag +.It Li \&0 +On successful completion, or if the signal +.Dv SIGALRM +was received. +.It Li \&>\&0 +An error occurred. +.El +.Sh EXAMPLES +To schedule the execution of a command for +.Va x +number seconds later: +.Pp +.Dl (sleep 1800; sh command_file >& errors)& +.Pp +This incantation would wait a half hour before +running the script command_file. (See the +.Xr at 1 +utility.) +.Pp +To reiteratively run a command (with the +.Xr csh 1 ) : +.Pp +.Bd -literal -offset indent -compact +while (1) + if (! -r zzz.rawdata) then + sleep 300 + else + foreach i (`ls *.rawdata`) + sleep 70 + awk -f collapse_data $i >> results + end + break + endif +end +.Ed +.Pp +The scenario for a script such as this might be: a program currently +running is taking longer than expected to process a series of +files, and it would be nice to have +another program start processing the files created by the first +program as soon as it is finished (when zzz.rawdata is created). +The script checks every five minutes for the file zzz.rawdata, +when the file is found, then another portion processing +is done courteously by sleeping for 70 seconds in between each +awk job. +.Sh SEE ALSO +.Xr setitimer 2 , +.Xr alarm 3 , +.Xr sleep 3 , +.Xr at 1 +.Sh STANDARDS +The +.Nm sleep +command is expected to be +.St -p1003.2 +compatible. diff --git a/bin/sleep/sleep.c b/bin/sleep/sleep.c new file mode 100644 index 000000000000..365d39e96088 --- /dev/null +++ b/bin/sleep/sleep.c @@ -0,0 +1,80 @@ +/* + * Copyright (c) 1988, 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. + */ + +#ifndef lint +static char copyright[] = +"@(#) Copyright (c) 1988, 1993, 1994\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)sleep.c 8.3 (Berkeley) 4/2/94"; +#endif /* not lint */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +void usage __P((void)); + +int +main(argc, argv) + int argc; + char *argv[]; +{ + int ch, secs; + + while ((ch = getopt(argc, argv, "")) != EOF) + switch(ch) { + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + if (argc != 1) + usage(); + + if ((secs = atoi(*argv)) > 0) + (void)sleep(secs); + exit(0); +} + +void +usage() +{ + + (void)fprintf(stderr, "usage: sleep seconds\n"); + exit(1); +} |