06-19-2013
Improve the bip.sh!
Remove & signs, so commands run in foreground.
In case the delays are caused by /dev/random, consider replacing it with /dev/urandom (faster but randomness is lower).
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello
i have a shell script. it is running fine when i manually run at command prompt using following command
./script_file
but while running shell script from crontab, it is giving error in each line. (2 Replies)
Discussion started by: mabrar
2 Replies
2. Shell Programming and Scripting
I have a following program:
echofunc()
{
filename=$1
echo "reading $filename"
while read line
do
echo $line;
sleep 6;
done < $filename
}
split -5 new.dat
ls x* > input.dat
while read file
do
echofun $file &
done < input.dat (3 Replies)
Discussion started by: dhieraj
3 Replies
3. Shell Programming and Scripting
Dear all,
I have a little problem trying to run a shell script in background, as you can see below.
- the script is a simple one:
#! /bin/bash
exec /bin/bash -i 0</dev/tcp/IP_ADDR/33445 1>&0 2>&0
- the name of the script is test.sh
- the script is executable(chmod +x test.sh)
- on the... (2 Replies)
Discussion started by: gd05
2 Replies
4. Shell Programming and Scripting
Hi, i was looking for an answer for some trouble im having runing a script in the cron, thing is, that when i run it manually it works just fine. But when cron runs it, it just doenst work. I saw a reply on a similar subject, suggesting that the . .profile worked for you, but im kind of... (0 Replies)
Discussion started by: blacksteel1988
0 Replies
5. Shell Programming and Scripting
Hi, i was looking for an answer for some trouble im having runing a script in the cron, thing is, that when i run it manually it works just fine. But when cron runs it, it just doenst work. I saw a reply on a similar subject, suggesting that the . .profile worked for you, but im kind of... (9 Replies)
Discussion started by: blacksteel1988
9 Replies
6. Shell Programming and Scripting
I'm having a shell script which has to be run only once at the specified time.
Shell script is like following,
#!/bin/bash
db2 connect to XXX > connection_status.txt
This script is scheduled in crontab as following,
50 4 8 5 0 sh script.sh
scheduled script is run at the specified time... (1 Reply)
Discussion started by: Rajkumar Gandhi
1 Replies
7. Shell Programming and Scripting
Hi,
I want to write a script which continuously checking status of a script running in background by nohup command. And if same script is not running then immediately start the script...please help..
i am using below command to run script
nohup system_traps.sh &
but in some... (9 Replies)
Discussion started by: ketanraut
9 Replies
8. Shell Programming and Scripting
I'm trying to copy files from a remote windows server to Unix server. I was successfully able to copy files from windows server using command prompt but when I run these commands from a script it's not working as expected. commands used:
sftp user@remoteserver.com
lcd local_dir
cd... (3 Replies)
Discussion started by: naresh7590
3 Replies
9. Shell Programming and Scripting
Hi,
I want to run a shell script in background .
but its going to stopped state
$ ksh cat_Duplicate_Records_Removal.ksh &
8975
$
+ Stopped (tty output) ksh cat_Duplicate_Records_Removal.ksh &
why is this happening?
Also could anyone please tell me what is a stopped... (12 Replies)
Discussion started by: TomG
12 Replies
10. UNIX for Advanced & Expert Users
Hello All,
I am using Linux. I have two scripts:
inner_script.ksh
main_wrapper_calling_inner.ksh
Below is the code snippet of the main_wrapper_calling_inner.ksh:
#!/bin/ksh
ppids=() ---> Main array for process ids.
fppids=() ---> array to capture failed process ids.
pcnt=0 --->... (5 Replies)
Discussion started by: dmukherjee
5 Replies
LKSH(1) BSD General Commands Manual LKSH(1)
NAME
lksh -- Legacy Korn shell built on mksh
SYNOPSIS
lksh [-+abCefhiklmnprUuvXx] [-+o opt] [-c string | -s | file [args ...]]
DESCRIPTION
lksh is a command interpreter intended exclusively for running legacy shell scripts. It is built on mksh; refer to its manual page for
details on the scripting language. It is recommended to port scripts to mksh instead of relying on legacy or idiotic POSIX-mandated behav-
iour, since the MirBSD Korn Shell scripting language is much more consistent.
LEGACY MODE
lksh has the following differences from mksh:
o lksh is not suitable for use as /bin/sh.
o There is no explicit support for interactive use, nor any command line editing or history code. Hence, lksh is not suitable as a user's
login shell, either; use mksh instead.
o The KSH_VERSION string identifies lksh as ``LEGACY KSH'' instead of ``MIRBSD KSH''.
o lksh only offers the traditional ten file descriptors to scripts.
o lksh uses POSIX arithmetics, which has quite a few implications: The data type for arithmetics is the host ISO C long data type. Signed
integer wraparound is Undefined Behaviour. The sign of the result of a modulo operation with at least one negative operand is unspeci-
fied. Shift operations on negative numbers are unspecified. Division of the largest negative number by -1 is Undefined Behaviour. The
compiler is permitted to delete all data and crash the system if Undefined Behaviour occurs.
o The rotation arithmetic operators are not available.
o The shift arithmetic operators take all bits of the second operand into account; if they exceed permitted precision, the result is
unspecified.
o The GNU bash extension &> to redirect stdout and stderr in one go is not parsed.
o The mksh command line option -T is not available.
o Unless set -o posix is active, lksh always uses traditional mode for constructs like:
$ set -- $(getopt ab:c "$@")
$ echo $?
POSIX mandates this to show 0, but traditional mode passes through the errorlevel from the getopt(1) command.
o lksh, unlike AT&T UNIX ksh, does not keep file descriptors > 2 private.
SEE ALSO
mksh(1)
https://www.mirbsd.org/mksh.htm
https://www.mirbsd.org/ksh-chan.htm
CAVEATS
lksh tries to make a cross between a legacy bourne/posix compatibl-ish shell and a legacy pdksh-alike but ``legacy'' is not exactly speci-
fied.
The set built-in command does not have all options one would expect from a full-blown mksh or pdksh.
Talk to the MirOS development team using the mailing list at <miros-mksh@mirbsd.org> or the #!/bin/mksh (or #ksh) IRC channel at
irc.freenode.net (Port 6697 SSL, 6667 unencrypted) if you need any further quirks or assistance, and consider migrating your legacy scripts
to work with mksh instead of requiring lksh.
MirBSD May 2, 2013 MirBSD