Sponsored Content
Full Discussion: Trap explanation?
Top Forums UNIX for Beginners Questions & Answers Trap explanation? Post 303004483 by rbatte1 on Tuesday 3rd of October 2017 08:36:24 AM
Old 10-03-2017
Of course, this only runs at the end of the script (i.e. the EXIT point of the shell)

Is there anything else in the script or is this the last operation? If it is, then I would get rid of the trap altogether or put it up at the top so it cleans up if your script aborts somewhere.



Robin
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Building a better mouse trap, or How many lines of code does it take to trap a mouse?

Hello all, I'm hoping to get a little insight from some of the wily veterans amongst you. I've written a script to check for new outgoing files to our vendors located on our ssl server. It seems to be working ok, but the final question here, will be one of logic, and/or a better way to... (4 Replies)
Discussion started by: mph
4 Replies

2. Shell Programming and Scripting

tr explanation please

how does below tr command replace nonletters with newlines? I think I understand tr -cs '\n' part.. but what is A-Za-z\' <--- what is this?? tr -cs A-Za-z\' '\n' | -c --complement -s, --squeeze-repeats replace each input sequence of a repeated character that is... (0 Replies)
Discussion started by: convenientstore
0 Replies

3. Shell Programming and Scripting

tr explanation please

how does below tr command replace nonletters with newlines? I think I understand tr -cs '\n' part.. but what is A-Za-z\' <--- what is this?? tr -cs A-Za-z\' '\n' | -c --complement -s, --squeeze-repeats replace each input sequence of a repeated character that is... (1 Reply)
Discussion started by: convenientstore
1 Replies

4. UNIX for Advanced & Expert Users

Need help with trap

Hi Our problem is knowing: What is the "best" way of simulating a TRAP for ERR within a function, since we know this will not work directly with ksh93 and aix5. How can we save the error encountered in the function and then deal with it in the calling script? Thanks! (3 Replies)
Discussion started by: theteeth07
3 Replies

5. UNIX and Linux Applications

need explanation

Hi am having a c pgm. It has the include files (unistd.h,sys/types.h,win.h,scr.h,curses.h,stdarg.h and color.h). I don't know the purpose of these include files. will u plz explain me. (1 Reply)
Discussion started by: Mari.kb
1 Replies

6. Shell Programming and Scripting

How to trap

I have a script #!/bin/ksh trap cleanup 20 cleanup() { cat $t.log echo Caught exit 1 } if ;then echo Found >>t.log exit 20 else echo Not found >>t.log exit 20 fi (5 Replies)
Discussion started by: thana
5 Replies

7. Shell Programming and Scripting

Cntl+z Trap is not detecting ??? Help required to add a trap detection ???

Hi folks, I have tried to add some trap detection in the below script....this script is used to monitor database activities...in a rather awkward way :rolleyes:.... The idea behind adding trap is that....this script creates lots of temporary files in the running folder to store the count... (1 Reply)
Discussion started by: frozensmilz
1 Replies

8. UNIX for Dummies Questions & Answers

In need of explanation

Its great someone provided this script that strips out a filename and extension but can someone explain how each line works? file1='Jane Mid Doe.txt' newfile='Jane.txt' 1) ext=${file1##*.} 2) filename=${file%%.???} 3) set -- $filename 4) newfile="1.$extension" (1 Reply)
Discussion started by: Lillyt
1 Replies

9. Homework & Coursework Questions

VM trap may work differently than a pure install trap.

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: That is the last reply I received from my instructor, and I'm looking for some alternatives. When using... (2 Replies)
Discussion started by: newuser45
2 Replies

10. Shell Programming and Scripting

Need explanation

Hi, I need more explination on it, how it works abcd="$(echo "$abcd" | sed 's/ //g')" >> ${LOGFILE} 2>&1 can any one suggest me on this? Rgds, LKR (1 Reply)
Discussion started by: lakshmanraok
1 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 11:07 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy