Apologize if this is doesn't come under this group. I have a small script to find out users who last logged in to check there mail. (Tru 64 4.0, Netscape mail 3.6)
----->
cat $1|awk -F: '$2=="SMTP-Accept" && $5~/@maildomain/ {s=$5;u++;las=substr($1)} END {for (i in u) {print... (2 Replies)
Could some one help me on this... For loop is working...!
for x in $i
do
for y in $j
do
z=`echo $y | awk '{print $2}'`
if
then
FS=`/usr/bin/echo $y`
echo $FS >>$Basic_location/out.csv
fi
done
CPRT="Cpoyright @ BTOIDCIM"
done (3 Replies)
If then else segment of below code is not working. For each filename code is displaying output for if part as well as else part. Please help its urgent.
for usercusttop in `echo ${filename}|sort|uniq|cut -c 1-${actualwordcount}`
do
... (2 Replies)
The following piece of code is not running because it is fails to go inside the if condition. i want to create a directory if there is no directory in the input path. i am using Linux, by CENT. Please help.
echo " Enter the path where you u want to extract the tar"
read EXTRACT_PATH
ls -ld... (12 Replies)
here we go..
While loop is not working file.. It also invokes one more shell scripts for which parameters need to passed on.
while read line
do
####
#### We want to have a logfile for each load
####
PLog="${LogDir}/${Script}.log";
####
... (5 Replies)
hi everyone
i am facing a very strange problem . please help me why my while loop is not working.
below is my code
#!/bin/ksh
file=RCMC_ABC_999_080924_210813.DAR
echo ${file}
value=001
count=10
echo "abc"
echo ${count}
value=$((${value} + 1 ))
echo ${value}
while ]
do
echo... (3 Replies)
Hi All,
For loop in ksh not working if it was given in the following method.
simple script:
for i in {1..4}
do
echo $i
done
Output:
{1..4}
Even below also not working :(
Script:
for (( c=1; c<=5; c++ )) do echo "Welcome $c times..." done
Output:
./x.sh: 0403-057 Syntax error... (13 Replies)
Hi new to C give me a hand thank.
do
{
bzero(input,256);
printf("Please enter the country name!");
scanf("%s",input); //& character is essential for scanf(), %f = float, %399s as the last character to be the null character ('\0').
}
while... (5 Replies)
Hi,
I have ten different files to extract. so I thought for loop will help me. but it's not working for me. Please advice what I am doing wrong.
for INCI in 1 2 3 4 5 6 7 8 9 10
do
tar -xvf Update_INCI11.10.002_lnx86_1of10.tar
done
second file name is... (3 Replies)
Hello all,
I would like to unzip some files with a for-loop.
Is there anyone who could tell me how I should do this - in a correct way?
for file in $(ls); do echo gzip -d < $file | tar xf -; done
The problem is the pipe - I believe. But how could I do it? I need it for the command... (4 Replies)
Discussion started by: API
4 Replies
LEARN ABOUT OSX
shlock
SHLOCK(1) BSD General Commands Manual SHLOCK(1)NAME
shlock -- create or verify a lock file for shell scripts
SYNOPSIS
shlock [-du] [-p PID] -f lockfile
DESCRIPTION
The shlock command can create or verify a lock file on behalf of a shell or other script program. When it attempts to create a lock file, if
one already exists, shlock verifies that it is or is not valid. If valid, shlock will exit with a non-zero exit code. If invalid, shlock
will remove the lock file, and create a new one.
shlock uses the link(2) system call to make the final target lock file, which is an atomic operation (i.e. "dot locking", so named for this
mechanism's original use for locking system mailboxes). It puts the process ID ("PID") from the command line into the requested lock file.
shlock verifies that an extant lock file is still valid by using kill(2) with a zero signal to check for the existence of the process that
holds the lock.
The -d option causes shlock to be verbose about what it is doing.
The -f argument with lockfile is always required.
The -p option with PID is given when the program is to create a lock file; when absent, shlock will simply check for the validity of the lock
file.
The -u option causes shlock to read and write the PID as a binary pid_t, instead of as ASCII, to be compatible with the locks created by
UUCP.
EXIT STATUS
A zero exit code indicates a valid lock file.
EXAMPLES
BOURNE SHELL
#!/bin/sh
lckfile=/tmp/foo.lock
if shlock -f ${lckfile} -p $$
then
# do what required the lock
rm ${lckfile}
else
echo Lock ${lckfile} already held by `cat ${lckfile}`
fi
C SHELL
#!/bin/csh -f
set lckfile=/tmp/foo.lock
shlock -f ${lckfile} -p $$
if ($status == 0) then
# do what required the lock
rm ${lckfile}
else
echo Lock ${lckfile} already held by `cat ${lckfile}`
endif
The examples assume that the file system where the lock file is to be created is writable by the user, and has space available.
HISTORY
shlock was written for the first Network News Transfer Protocol (NNTP) software distribution, released in March 1986. The algorithm was sug-
gested by Peter Honeyman, from work he did on HoneyDanBer UUCP.
AUTHORS
Erik E. Fair <fair@clock.org>
BUGS
Does not work on NFS or other network file system on different systems because the disparate systems have disjoint PID spaces.
Cannot handle the case where a lock file was not deleted, the process that created it has exited, and the system has created a new process
with the same PID as in the dead lock file. The lock file will appear to be valid even though the process is unrelated to the one that cre-
ated the lock in the first place. Always remove your lock files after you're done.
BSD June 29, 1997 BSD