First, time is a shell builtin and likely won't work in that context. You might have to do something like ksh -c "time ./gengrep"
Also, I'm not sure if stdin is redirected.
Also, if you're using ksh, you should disown the process after you background it.
How about:
In ksh, time isn't just a shell built-in; it's a shell keyword. (I'm sure Corona688 understands the difference, but for other readers who may not, it matters when you want to time a pipeline consisting of more than one process. In a shell where time is a keyword:
will give you timing results for the entire pipeline. In a shell were time is a built-in, that command will just give you timing results for the execution of a; not the entire pipeline.) The POSIX standards allow time to be either a keyword or a built-in.
Note also that disown with no operands will disown all active background jobs started by the shell; not just the most recently started background job. If that isn't what you want, you might want to try something more like:
This User Gave Thanks to Don Cragun For This Post:
Hi,
I have a script as follows:
#!/bin/sh
nohup ./my_program >& /dev/null &
However, i get a "Generated or received a file descriptor number that is not valid" whenever I run it.
running the command up in prompt is ok though.
if i change the first line to #!/bin/csh
i get a then:... (4 Replies)
Hi,
Using nohup it sends output automatically to $HOME/nohup.out - how do I direct this output to another named file instead, so I can run several scripts in the background at once, directing their outputs into individual log files?
Cheers (3 Replies)
Hi
I submitted a long running executable without using nohup. Now, is there any way I can assure to keep that process ON even if my session gets killed?
Thanks
Bobby (3 Replies)
I find that if I use nohup (in bourne shell script) then all the interactive parts in my code are gone hidden... e.g., the places asking input from the user (such as ckyorn) will not be displayed. This is no good.
Is there a way to use nohup (or similar utility) and meanwhile, to keep the... (9 Replies)
hi,
im using nohup command to execute one script.
in the nohup.out im getting standerd output as well as standerd error in it.
i want standerd output and error in nohup.out and only standerd error in error.txt file.
im using command like following
nohup sh test.sh 2>error.txt &
... (5 Replies)
Hi,
I've read the man page on nohup.
But I still can't see what's the differences if
we just send a process to background versus
sending a nohup process to background.
eg:
myprocess &
vs
nohup myprocess &
Without nohup, myprocess would still run uninterruptible
at background... (2 Replies)
Hi,
I am running the below script. When i run the script normally it executes fine but when i run the same script using nohup it throws an error as getStatus.sh: syntax error at line 3: `(' unexpected . Can you let me know why it is so?
while
do
. $(dirname $0)/include.sh
cd... (2 Replies)
Good afternoon,
I'm have program that executes in background another programs. The main program would be programA and the programs executed by the main one, would be program1a, program1b and program1c.
I need the programs to continue the execution no matter if the shell connection is lost,... (6 Replies)
Shell : bash
OS : Oracle Linux 6.4
I want to save the ouput of a nohup command to file other than nohup.out . Below are my 3 attempts.
For both Attempt1 and Attempt2 , the redirection logs the output correctly to the output file. But I get the error "ignoring input and redirecting stderr to... (7 Replies)
Hi,
running this script in normal mode, no error occours
#!/usr/bin/ksh
VALUE=0
SUBJECT='sub'
ADDRESSES="aaa@gmail.com"
BODY='body'
while true
do
COUNT=$(tail -2500 /log/file.log | grep -i "error" | wc -l)
if ; then
echo "$BODY" | mailx -s "$SUBJECT" "$ADDRESSES"... (3 Replies)