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authorAaron Campbell <aaron@cvs.openbsd.org>2000-02-19 23:03:51 +0000
committerAaron Campbell <aaron@cvs.openbsd.org>2000-02-19 23:03:51 +0000
commitc18d5dfd73078844b6dad9e2c92994436fa7233e (patch)
tree2a86f43546c8081bb45995504c471c0a74af92e8
parent2e437382cb62d4765ed74587de3175c83a38bca0 (diff)
Improve.
-rw-r--r--bin/sleep/sleep.167
1 files changed, 34 insertions, 33 deletions
diff --git a/bin/sleep/sleep.1 b/bin/sleep/sleep.1
index 5bb4a0f5114..c1d9b2b4632 100644
--- a/bin/sleep/sleep.1
+++ b/bin/sleep/sleep.1
@@ -1,4 +1,4 @@
-.\" $OpenBSD: sleep.1,v 1.10 2000/01/05 01:58:03 pjanzen Exp $
+.\" $OpenBSD: sleep.1,v 1.11 2000/02/19 23:03:50 aaron Exp $
.\" $NetBSD: sleep.1,v 1.9 1995/07/25 19:37:43 jtc Exp $
.\"
.\" Copyright (c) 1990, 1993, 1994
@@ -50,37 +50,19 @@
The
.Nm
utility
-suspends execution for a minimum of
+suspends execution for a minimum of the specified number of
.Ar seconds .
-.Ar seconds
-must be positive and may contain a decimal fraction.
-.Nm
-is used to schedule the execution of other commands (see
-.Sx EXAMPLES
-below).
-.Pp
-The
+This number must be positive and may contain a decimal fraction.
.Nm
-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
-.Pp
-.Nm
-handles fractional arguments as an extension to
-.St -p1003.2 .
+is commonly used to schedule the execution of other commands (see below).
.Sh EXAMPLES
-.Dl (sleep 1800; sh command_file >& errors)&
-.Pp
-This incantation would wait a half hour before
-running the script command_file (see also the
+Wait a half hour before running the script
+.Pa command_file
+(see also the
.Xr at 1
-utility).
+utility):
+.Pp
+.Dl (sleep 1800; sh command_file >& errors)&
.Pp
To repetitively run a command (with
.Xr csh 1 ) :
@@ -99,14 +81,16 @@ The scenario for such a script 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.
-Then, when the file is found, processing is done in several steps
+(when
+.Pa zzz.rawdata
+is created).
+The script checks every five minutes for this file.
+When it is found, processing is done in several steps
by sleeping 70 seconds between each
.Xr awk 1
job.
.Pp
-To monitor the growth of a file without consuming too many resources :
+To monitor the growth of a file without consuming too many resources:
.Pp
.Bd -literal -offset indent -compact
while true; do
@@ -114,14 +98,31 @@ while true; do
sleep 5
done
.Ed
+.Sh DIAGNOSTICS
+The
+.Nm
+utility exits with one of the following values:
+.Pp
+.Bl -tag -width flag -compact
+.It Li \&0
+On successful completion, or if the signal
+.Dv SIGALRM
+was received.
+.It Li \&>\&0
+An error occurred.
+.El
.Sh SEE ALSO
.Xr at 1 ,
+.Xr nanosleep 2 ,
.Xr setitimer 2 ,
.Xr alarm 3 ,
-.Xr sleep 3
+.Xr sleep 3 ,
+.Xr usleep 3
.Sh STANDARDS
The
.Nm
command offers a superset of
.St -p1003.2
functionality.
+The handling of fractional arguments is provided as an extension to the
+specification.