hi all. i have a little problem. im basically reading input from the user from the keyboard into the variable "phonenumber". I want to do a little error check to check if the user doesnt enter anything in for the value phonenumber.
i had this:
read phonenumber
if
then
.....
else
........ (2 Replies)
Hey all. Thanks in advance for any help you can give, hopefully this is an easy one. I want to create a loop to run a simple performance monitor like vmstat and record it to a file, but have very limited scripting skills (obviously).
Starting with this...
date >> /var/log/perfmon.log
vmstat... (2 Replies)
I'm just trying to make a script that runs in command line to echo each line in a text file. Everything i found on google is telling me to do it like this but when I run it it just echos removethese.txt and thats it. Anyone know what im doing wrong?
for i in removethese.txt; do echo $i; done
... (4 Replies)
Hi everyone - I am sure this is a really simple problem but I'm a total noob at Linux scripting:
I wanted to create a script that allows me to compare the current week number to the contents of a text file in my home directory:
VAR1='date +%V'
VAR2='cat /home/fred/file.txt'
... (6 Replies)
Hi everyone, I am facing to one shell script problem, which is as following
Write a shell script that:
Takes a number of arguments.
For each argument, print out all files in the current directory that contain this substring in their name.
I know I need to use grep for the second... (7 Replies)
I am trying to create a simple ksh loop script. What I've pasted below is not working. Any help is appreciated.
typeset -i count
typeset -i tcount
count=0
tcount=0
while $tcount >= 11
do
print "\$count is $count"
pwd
ls -l
sleep 30
$(( $tcount = $count + 1 ))
... (5 Replies)
Hi,
I am completely new to shell scripting. Basically I am wanting to create a simple while loop script to check if a network connection is available from 'netstat -a' and if its present then output a character to the serial port. I think i am nearly there.. but need some assistance.. this is... (9 Replies)
Hi all,
Please guide me writing this script
Follwing is the file which I have created, which contains the files to be copied.
cat system1-dr.txt
/etc/passwd
/etc/shadow
/etc/group
/etc/vfstab
/etc/profile
/etc/default/init
/etc/shells
/etc/dfs/dfstab
/etc/dfs/sharetab... (11 Replies)
Dear unix wizards,
I'd be very grateful for your help with the following.
I have a hypothetical file (file.txt) with three columns:
111 4 0.01
112 3 0.02
113 2 0.03
114 1 0.04
115 1 0.06
116 2 0.02
117 3 0.01
118 4 0.05
Column 2 consists of pairs of integers from 1 to 4 (each... (5 Replies)
Discussion started by: aberg
5 Replies
LEARN ABOUT HPUX
ftrylockfile
flockfile(3S)flockfile(3S)NAME
flockfile(), ftrylockfile(), funlockfile() - explicit locking of streams within a multithread application
SYNOPSIS DESCRIPTION
The and functions provide for explicit application-level locking of streams. These functions can be used by a thread to delineate a
sequence of I/O statements that are to be executed as a unit.
The function is used by a thread to acquire ownership of a object.
The function is used by a thread to acquire ownership of a object if the object is available; is a non-blocking version of
The function is used to relinquish the ownership granted to the thread. The behavior is undefined if a thread other than the current owner
calls the function.
Logically, there is a count associated with each stream. This count is implicitly initialized to zero when the stream is created. The
stream is unlocked when the count is zero. When the count is positive, a single thread owns the stream. When the function is called, if
the count is zero or if the count is positive and the caller owns the stream, the count is incremented. Otherwise, the calling thread is
suspended, waiting for the count to return to zero. Each call to decrements the count. This allows matching calls to (or successful calls
to and to be nested.
All POSIX.1 and C standard functions that reference objects behave as if they use and internally to obtain ownership of these objects.
RETURN VALUE
None for and The function returns zero for success and nonzero to indicate that the lock cannot be acquired.
flockfile(3S)