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Top Forums UNIX for Dummies Questions & Answers How to get a timestamp when running nohup & from a shell? Post 302905389 by rbatte1 on Wednesday 11th of June 2014 09:39:01 AM
Old 06-11-2014
Putting a command in the background means that you lose the flow. Your initial:-
Code:
date
nohup cp -rp /files/source /files/target &
date

.... will just give you two timestamps almost immediately sequentially and your script will continue whilst the copy make still be progressing.

What are you actually after? If you keep the copy in the foreground of your script (take off the nohup and the &) then you will get the correct before & after times.

For a marker telling you the elapse (and other info) just use this:-
Code:
date
time cp -rp /files/source /files/target
date


I hope that this helps



Robin
 

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NOHUP(1)						    BSD General Commands Manual 						  NOHUP(1)

NAME
nohup -- invoke a utility immune to hangups SYNOPSIS
nohup [--] utility [arguments] DESCRIPTION
The nohup utility invokes utility with its arguments and at this time sets the signal SIGHUP to be ignored. If the standard output is a ter- minal, the standard output is appended to the file nohup.out in the current directory. If standard error is a terminal, it is directed to the same place as the standard output. Some shells may provide a builtin nohup command which is similar or identical to this utility. Consult the builtin(1) manual page. ENVIRONMENT
The following variables are utilized by nohup: HOME If the output file nohup.out cannot be created in the current directory, the nohup utility uses the directory named by HOME to create the file. PATH Used to locate the requested utility if the name contains no '/' characters. EXIT STATUS
The nohup utility exits with one of the following values: 126 The utility was found, but could not be invoked. 127 The utility could not be found or an error occurred in nohup. Otherwise, the exit status of nohup will be that of utility. SEE ALSO
builtin(1), csh(1), signal(3) STANDARDS
The nohup utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BUGS
Two or more instances of nohup can append to the same file, which makes for a confusing output. BSD
July 19, 2001 BSD
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