Sponsored Content
Top Forums Shell Programming and Scripting Sending an event from another bash shell Post 302340877 by peterro on Tuesday 4th of August 2009 02:25:36 PM
Old 08-04-2009
You could create a named pipe and use that to communicate between the two. Create the file mkfifo pipe_name, with one shell, cat some_file > pipe_name. It will appear to hang, with second shell, cat pipe_name and the output will be displayed and the first shell will complete.

Now with the second shell, cat pipe_name, this will appear to hang. With the first shell, cat some_file > pipe_name. The output will be displayed in the second.

That may seem clear as mud.
 

8 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

keypress event in shell script

Hi All, How can I trap a character press in the shell script. For eg:- I have a script runinng a infinite loops , I will need to dispay menu asking for run process of to stop process and process stauts like we do in glance I have seen the traping the signal in glance command, (8 Replies)
Discussion started by: arvindng
8 Replies

2. UNIX for Dummies Questions & Answers

Can we trigger an shell script on an event

Hi, My program A updates a log called logA. I have a shell script S that is responsible to send emails reading from the log. I want to trigger execution of the script whenever there is an update to the log. Thanks in advance. (8 Replies)
Discussion started by: cv_pan
8 Replies

3. Shell Programming and Scripting

sending mail via Bash

Hello , I want to send mail via bash script but i want to add from parameter for example i want to send to test@gmail.com and the sender will be test2@gmail.com Thanks for all (1 Reply)
Discussion started by: LinuxCommandos
1 Replies

4. Shell Programming and Scripting

bash unix cron + sending sms

Hi all, i'm trying to send an sms (notification sms) via a bash script executing throw crontab. The script works fine, but the sms itsn't sent to me. can you help me to resolve this issue, plz. Thanks. Yes - we probably COULD help you if you WOULD provide us with your script, the... (0 Replies)
Discussion started by: arezki76
0 Replies

5. Shell Programming and Scripting

/bin/bash: Event not found.

Hi I'm new to scripting - please help me... I'm trying to run a script written by a friend: #!/bin/bash for aStat in .... do .... done when coping the script to the terminal I get: /bin/bash: Event not found. for: Command not found. (7 Replies)
Discussion started by: atira
7 Replies

6. Shell Programming and Scripting

Shell script to execute condition until an event occurs

I need a script to keep polling "receive_dir" directory till "stopfile" get written in the directory. This has to run despite empty directory. So far i have this but fails if receive_dir is empty with no files with "unary operator expected". Help !! #!/usr/bin/ksh until do for i... (1 Reply)
Discussion started by: iaav
1 Replies

7. Shell Programming and Scripting

Sending awk variables into curl in a bash script

Hello experts! I have a file1 with the following format (yr,day, month, hour,minute): 201201132435 201202141210 201304132030 201410100110 ... What i want to do is to assign variables and then use them in the curl command to download the text of each event from a web page. What I have... (6 Replies)
Discussion started by: phaethon
6 Replies

8. Shell Programming and Scripting

Sending email to group in bash

In shell scripting, TestEmail is an existing group email. I am using the below command to send emails who are existed under TestEmail . Unable to receive the email. I have tried group ="id1 id2 " .Its working and i tried creating alias as well. Can we do it without creating alias or group ="id1... (1 Reply)
Discussion started by: thomas9192
1 Replies
SYSTEMD-CAT(1)							    systemd-cat 						    SYSTEMD-CAT(1)

NAME
systemd-cat - Connect a pipeline or program's output with the journal SYNOPSIS
systemd-cat [OPTIONS...] [COMMAND] [ARGUMENTS...] systemd-cat [OPTIONS...] DESCRIPTION
systemd-cat may be used to connect the standard input and output of a process to the journal, or as a filter tool in a shell pipeline to pass the output the previous pipeline element generates to the journal. If no parameter is passed, systemd-cat will write everything it reads from standard input (stdin) to the journal. If parameters are passed, they are executed as command line with standard output (stdout) and standard error output (stderr) connected to the journal, so that all it writes is stored in the journal. OPTIONS
The following options are understood: -h, --help Print a short help text and exit. --version Print a short version string and exit. -t, --identifier= Specify a short string that is used to identify the logging tool. If not specified, no identification string is written to the journal. -p, --priority= Specify the default priority level for the logged messages. Pass one of "emerg", "alert", "crit", "err", "warning", "notice", "info", "debug", or a value between 0 and 7 (corresponding to the same named levels). These priority values are the same as defined by syslog(3). Defaults to "info". Note that this simply controls the default, individual lines may be logged with different levels if they are prefixed accordingly. For details, see --level-prefix= below. --level-prefix= Controls whether lines read are parsed for syslog priority level prefixes. If enabled (the default), a line prefixed with a priority prefix such as "<5>" is logged at priority 5 ("notice"), and similar for the other priority levels. Takes a boolean argument. EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise. EXAMPLES
Example 1. Invoke a program This calls /bin/ls with standard output and error connected to the journal: # systemd-cat ls Example 2. Usage in a shell pipeline This builds a shell pipeline also invoking /bin/ls and writes the output it generates to the journal: # ls | systemd-cat Even though the two examples have very similar effects the first is preferable since only one process is running at a time, and both stdout and stderr are captured while in the second example, only stdout is captured. SEE ALSO
systemd(1), systemctl(1), logger(1) systemd 237 SYSTEMD-CAT(1)
All times are GMT -4. The time now is 10:51 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy