Sponsored Content
Top Forums Shell Programming and Scripting [BASH] redirect standard error and use it inside Post 302171832 by [MA]Flying_Meat on Friday 29th of February 2008 04:36:55 PM
Old 02-29-2008
In my testing:

myscript contains:
ls -al bonehead
touch tmptest

Issuing the command:
./myscript > temp2test.log 2>&1
This writes the error for the nonexistent bonehead file and touches the tmptest file but returns 0 for echo $?

Changing myscript to contain an exit status at the end:
ls -al bonehead
touch tmptest
exit 231

This writes the error for the nonexistent bonehead file and touches the tmptest file, but returns 231 for echo $?

So, you can track the conditions of each command you need error notification on, and assign a "meaningful" exit status to a variable, then at the end of your script, exit "$somevariablename".

You could combine multiple error status values to the same variable for exit status that can be grep'd for major issue notification...

So exit status will need to be handled in the script somehow (as it really should be).

<edit> OR, just grep yer log file for the error messages you expect to receive notification on.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

redirect standard error into log file

Hi, I am new in shell scripting. Can anyone point out what wrong of below script. If I want the error output to "sqlerror.log" and database pool data output to "bulk_main.dat". Right now, the below script, if successful execute, the data will output to bulk_main.dat && sqlerror.log both... (7 Replies)
Discussion started by: epall
7 Replies

2. UNIX for Dummies Questions & Answers

Question from a newbie. How to redirect standard output

I have a program that is sending error text to the console and I need to redirect that output to a log file. I'm brand new to Unix and don't know how to do this. Any direction would be greatly appreciated. (1 Reply)
Discussion started by: ndemos
1 Replies

3. Shell Programming and Scripting

redirect only the standard error output to mail

I'm writing a script using file descriptor 2 (std error) to send an email only if the command fails or errors out but the script always emails me irrepective of whether it fails or not. It will not email the /tmp/check.error file output if doesn't error out just the mail with the subject "Cannot... (3 Replies)
Discussion started by: barkath
3 Replies

4. Programming

Redirect Standard Output Multi-Process

Hi, I'm trying to compile the following code: /************** Begin <test.c> ***************/ /* * Compiled with: gcc -Wall -o test test.c */ #include <stdio.h> #include <unistd.h> int main(void) { printf("I'm process %d, son of %d \n", getpid(), getppid()); ... (5 Replies)
Discussion started by: djodjo
5 Replies

5. Shell Programming and Scripting

standard error to standard out question

Hi there how can i get the result of a command to not give me its error. For example, on certain systems the 'zfs' command below is not available, but this is fine becaues I am testing against $? so i dont want to see the message " command not found" Ive tried outputting to /dev/null 2>&1 to no... (5 Replies)
Discussion started by: hcclnoodles
5 Replies

6. Shell Programming and Scripting

loop logic inside of an inline redirect?

i need to log the feedback from the ftp server as i'm performing some deletes. the only way i know of to do this is with the inline redirect << EOF ... but from there to the closing EOF, it's like i'm at the ftp command prompt, so I don't know how to have ksh script logic in there I have an... (3 Replies)
Discussion started by: tlavoie
3 Replies

7. Shell Programming and Scripting

Redirect standard error to input of other process, 2| ?

Hello, I would like to know if there is a shell in which operations such as 2| (redirect standard error of one process to the standard input of another one) exist? I know it is possible to do it in bash with things like: (process 2>&1) | other_process but I find it a bit intricate when... (3 Replies)
Discussion started by: chlorine
3 Replies

8. UNIX for Dummies Questions & Answers

Redirect Standard output and standard error into spreadsheet

Hey, I'm completely new at this and I was wondering if there is a way that I would be able to redirect the log files in a directories standard output and standard error into and excel spreadsheet in anyway? Please remember don't use too advanced of terminology as I just started using shell... (6 Replies)
Discussion started by: killaram
6 Replies

9. Shell Programming and Scripting

How redirect standard output to a file

Hi guys, i have a script named purgeErrors.ksh, when i execute this script i need to redirect the output to a log file in the same directory, how can i do that ?? -- Aditya (5 Replies)
Discussion started by: chaditya
5 Replies

10. UNIX for Dummies Questions & Answers

Redirect Standard Error to /dev/null is not working.

Hello. When I run a .ksh that contains the command below, and there is no file available in the source location the "FILE_NAME_*.CSV not found" error is still being displayed. FILEN=$(ssh ${SOURCE_SERV} "cd ${SOURCE_LOCATION} ;ls ${FILES}") 2> /dev/null. This is interfering with the rest... (4 Replies)
Discussion started by: jimbojames
4 Replies
exit(1)                                                            User Commands                                                           exit(1)

NAME
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps SYNOPSIS
sh exit [n] return [n] csh exit [ ( expr )] goto label ksh *exit [n] *return [n] DESCRIPTION
sh exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of the last command executed (an EOF will also cause the shell to exit.) return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe- cuted. csh exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the expression expr. The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to jump to a label that occurs between a while or for built-in command and its corresponding end. ksh exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit except for a shell which has the ignoreeof option (See set below) turned on. return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return is invoked while not in a function or a '.' script, then it is the same as an exit. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
break(1), csh(1), ksh(1), sh(1), attributes(5) SunOS 5.10 15 Apr 1994 exit(1)
All times are GMT -4. The time now is 09:47 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy