Sponsored Content
Top Forums Shell Programming and Scripting A Question Regarding Timers and Output Post 302618953 by methyl on Wednesday 4th of April 2012 03:52:20 PM
Old 04-04-2012
The script relies heavily on date +%s which is not valid in unix. Please describe what value you expect from this command.

Writing totally portable code for unix and Linux is extremely difficult and nigh on impossible if you start with bash on a random Linux computer with extensions to the "date" command. Please be a bit more specific about what Operating Systems and versions are involved here and what is the preferred Bourne-type Shell on each Operating System.

You have to find the lowest common denominator and work with that. If they are ALL modern computers, the current Posix standard is recommended by many posters here.
 

10 More Discussions You Might Find Interesting

1. Programming

unix and timers

Hello there.. I need to know when i start indipendant timers how can i recognize which of the active timers have made timeout alarm. The number of started timers depends on the running app I'd appreciate your help Thanks in advance (0 Replies)
Discussion started by: nightcat
0 Replies

2. Programming

A question about output.

I am learning output the data to a file using "ofstream". I need to read data from a file and output the result to the other file in 2 different ways. To do that I have to provoke two functions, and they have to output the result to the same text file. My problem is: they are correct on the screen... (2 Replies)
Discussion started by: HOUSCOUS
2 Replies

3. UNIX for Dummies Questions & Answers

Question on prtdiag output ...

Hello all , This is the output of my prtdiag command ...The speed of each of the CPUs is listed below (1281 MHz ) ..That's fine ..I'm confused about the (System clock frequency: 183 MHZ ) ..What is the difference between System Clock freq and CPU freq ...THanks.. System Configuration: Sun... (5 Replies)
Discussion started by: luft
5 Replies

4. Shell Programming and Scripting

display and output...question

Hi, I have a small question about the value cannot display correctly: MSG=log fruit=apple print "No $fruit in the store" > "$MSG/fruit_message.txt" output: No $fruit in the store should be: No apple in the store AND $MSG/fruit_message.txt ----------> cannot find the... (5 Replies)
Discussion started by: happyv
5 Replies

5. Shell Programming and Scripting

Question about output to file

Hi, I am try to setup a FOR loop script to find out all the existing linux workstations in the network w/ ip address, hostname and linux version. I created a basic FOR loop script: for i in $(seq 1 254) do echo 10.72.169.$i >> result ssh -o ConnectTimeout=3 root@10.72.169.$i "hostname"... (1 Reply)
Discussion started by: beeloo
1 Replies

6. Programming

Doubts about timers in linux kernel

Hi , I am trying to learn timers in linux kernel. I am trying to write a program where I can configure a timer to tick in every 5 seconds and a function should thus exicute in every five seconds. I tried one program with the help of linux/timer.h headerfile but I couldnt get the... (4 Replies)
Discussion started by: iamjayanth
4 Replies

7. Solaris

Question on kstat output

I'm having a little trouble understanding the output I'm seeing from kstat for the "net" class. I'm seeing a lot of entries with "mac" as the name, like this. module: bge instance: 3 name: mac class: net ... (3 Replies)
Discussion started by: Midcain
3 Replies

8. Shell Programming and Scripting

Command Output Question

Hi everyone-- I'm new to these forums and shell scripting, and I'm trying to write a script that checks if a particular ip is pingable My idea was to check if the output of the command ping <some ip> -c 1 -w 1 had the string: "1 packet transmitted, 1 received"How would I go about doing this?... (2 Replies)
Discussion started by: Prodiga1
2 Replies

9. Programming

pthread_mutex_timedlock and Timers option

in its man-page pthread_mutex_timedlock documents that the absolute timeout parameter should be based on the CLOCK_REALTIME clock or in the system clock. All this depending on whether the 'Timers option' is supported or not. What do they mean by 'Timers option'? How could I tell for sure what... (8 Replies)
Discussion started by: ramestica
8 Replies

10. Shell Programming and Scripting

INPUT/OUTPUT question

Hi All, Is it wrong to do something like this: ssh -T $PROXY_USER@$PROXY_SERVER < script.txt > ssh_output.log I ran and it works fine and does what I need. I wanted to pass a set of commands to the ssh session and store an output in the log file. Thanks (4 Replies)
Discussion started by: rdogadin
4 Replies
OPENVT(1)                                                            Linux 1.x                                                           OPENVT(1)

NAME
openvt - start a program on a new virtual terminal (VT). SYNOPSIS
openvt [-c vtnumber] [OPTIONS] [--] command DESCRIPTION
openvt will find the first available VT, and run on it the given command with the given command options, standard input, output and error are directed to that terminal. The current search path ($PATH) is used to find the requested command. If no command is specified then the environment variable $SHELL is used. OPTIONS -c, --console=VTNUMBER Use the given VT number and not the first available. Note you must have write access to the supplied VT for this to work; -f, --force Force opening a VT without checking whether it is already in use; -e, --exec Directly execute the given command, without forking. This option is meant for use in /etc/inittab. If you want to use this feature in another context, be aware that openvt has to be a session leader in order for -e to work. See setsid(2) or setsid(1) on how to achieve this. -s, --switch Switch to the new VT when starting the command. The VT of the new command will be made the new current VT; -u, --user Figure out the owner of the current VT, and run login as that user. Suitable to be called by init. Shouldn't be used with -c or -l; -l, --login Make the command a login shell. A - is prepended to the name of the command to be executed; -v, --verbose Be a bit more verbose; -w, --wait wait for command to complete. If -w and -s are used together then openvt will switch back to the controlling terminal when the com- mand completes; -V, --version print program version and exit; -h, --help show this text and exit. -- end of options to openvt. NOTE
If openvt is compiled with a getopt_long() and you wish to set options to the command to be run, then you must supply the end of options -- flag before the command. EXAMPLES
openvt can be used to start a shell on the next free VT, by using the command: openvt bash To start the shell as a login shell, use: openvt -l bash To get a long listing you must supply the -- separator: openvt -- ls -l HISTORY
Earlier, openvt was called open. It was written by Jon Tombs <jon@gtex02.us.es or jon@robots.ox.ac.uk>. The -w idea is from "sam". SEE ALSO
chvt(1), doshell(8), login(1) 19 Jul 1996 V1.4 OPENVT(1)
All times are GMT -4. The time now is 09:26 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy