Maybe wait and repeat?
Instead of until or while you can also use an if clause. It gets the exit status of the awk command, 0 normally, 1 if a zero-file was found.
NB in the shell an exit status 0 is a true condition (for practical reasons).
You can suppress awk's output with >/dev/null, this doesn't affect its exit status.
---------- Post updated at 02:57 PM ---------- Previous update was at 02:49 PM ----------
Hi,
I would like to write a shell script that moves files from one folder to another without retrieving the error 'can not acces/find file or folder' when the source folder is empty.
Any ideas,
Thx in advance,
Steven. (2 Replies)
Hi,
I would like to write a shell script that moves files from one folder to another without retrieving the error 'can not find file or folder' when the folder is empty.
Any ideas,
Thx in advance,
Steven. (8 Replies)
Is there any way, we can find files not empty? I know one can find empty files by using find with -size is equalled to 0.
Please let me know, how I can find files greater than 0 or any other size in number? (2 Replies)
i have a list of files below:
rwxrwxrwx 1 pipe pipe 180 Mar 4 22:47 del_0n_Date
-rwxrwxrwx 1 pipe pipe 472 Mar 4 22:58 mail_Check
-rw-r--r-- 1 pipe pipe 92 Mar 4 22:58 minfo.txt
-rwxrwxrwx 1 pipe pipe 609 Mar 5 05:12... (6 Replies)
Hi all,
*I use Uwin and Cygwin emulator.
I´m trying to search for all text files in the current folder (C/Files) and its sub folders using
find -depth -name "*.txt"
The above command worked for me, but now I would like to copy all found text files to a new folder (C/Files/Text) with ... (4 Replies)
Hi,
I am using SunOS
I want to serch my previous command
from unix prompt
(like on AIX we can search by ESC -k)
how to get in SunOs
urgent help require. (10 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Need to make a script, to remove all empty files and folders from current category.
It also should show the name... (2 Replies)
I need to find empty files in a directory and write them into a text file. Directory will contain old files as well, i need to get the empty files for the last one hour only. (1 Reply)
I am scheduling a task at regular intervals at seconds acuracy using crond and sleep command . my data in crontab file is as below:-
the above line is working fine when we are creating this crontab file before 00:05 min .
But when we are creating the crontab file at 00:05min , unable to... (10 Replies)
Hi all,
This is my first and undoubtedly many posts to come. I'm new to using unix and would like a hand with this problem I have. What i'm trying to do is match 2 sets of data from 2 files and put result into file 3. Sounds simply but there is a catch, the match is a "partial field" match, if... (2 Replies)
Discussion started by: tugar
2 Replies
LEARN ABOUT NETBSD
sleep
SLEEP(1) BSD General Commands Manual SLEEP(1)NAME
sleep -- suspend execution for an interval of time
SYNOPSIS
sleep seconds
DESCRIPTION
The sleep utility suspends execution for a minimum of seconds. It is usually used to schedule the execution of other commands (see EXAMPLES
below).
Note: The NetBSD sleep command will accept and honor a non-integer number of specified seconds. This is a non-portable extension, and its
use will nearly guarantee that a shell script will not execute properly on another system.
When the SIGINFO signal is received, the estimate of the amount of seconds left to sleep is printed on the standard output.
EXIT STATUS
The sleep utility exits with one of the following values:
0 On successful completion, or if the signal SIGALRM was received.
>0 An error occurred.
EXAMPLES
To schedule the execution of a command for 1800 seconds later:
(sleep 1800; sh command_file >& errors)&
This incantation would wait half an hour before running the script command_file. (See the at(1) utility.)
To reiteratively run a command (with csh(1)):
while (1)
if (! -r zzz.rawdata) then
sleep 300
else
foreach i (*.rawdata)
sleep 70
awk -f collapse_data $i >> results
end
break
endif
end
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.
SEE ALSO at(1), nanosleep(2), sleep(3)STANDARDS
The sleep command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
BSD August 13, 2011 BSD