Sponsored Content
Full Discussion: Homework Help.
Homework and Emergencies Homework & Coursework Questions Homework Help. Post 302492808 by methyl on Tuesday 1st of February 2011 01:50:56 PM
Old 02-01-2011
Quote:
(statements; exit)
The brackets cause the two commands to be executed in a subshell. Therefore the "exit" will only exit the subshell not the calling shell.

We need to tell the calling program that we want to exit. One way is to exit with a non-zero status and test that value in the calling script.
Code:
(statements; exit 2) ; REPLY=$?
if [ $REPLY -eq 2 ]
then
     exit
fi

 

7 More Discussions You Might Find Interesting

1. Post Here to Contact Site Administrators and Moderators

Homework?

https://www.unix.com/shell-programming-scripting/113946-scripts.html Looks like an assignment or homework to me, does it to you? (5 Replies)
Discussion started by: TonyFullerMalv
5 Replies

2. UNIX for Dummies Questions & Answers

Homework :(

1. You have a very large file, named 'ColMe', tab-delimited, you are asked to process. You are told that each line in 'ColMe' has 7 columns, and that the values in the 5th column are integers. Using shell functions (and standard LINUX/UNIX filters), indicate how you would verify that these... (1 Reply)
Discussion started by: mb774
1 Replies

3. Homework & Coursework Questions

Need some help with my homework

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: Hi, since I'm relatively new to Unix I need some help. I've installed FreeBSD 8 on a virtual machine and I've done... (4 Replies)
Discussion started by: iLeeT777
4 Replies

4. Shell Programming and Scripting

Homework

1. Write a shell script to print the file names of all files having .txt extension of a given directory after converting to uppercase letters. The input (directory name) should be given as command line argument. The script will also check whether sufficient arguments are passed or not and whether... (1 Reply)
Discussion started by: aninda1989
1 Replies

5. Homework & Coursework Questions

Please help me with my homework!!!

A shell script is a script written for the shell, or command line interpreter, of an operating system. Typical operations performed by shell scripts include file manipulation, program execution, printing text etc. Shell : In computing, a shell is a piece of software that provides an interface for... (1 Reply)
Discussion started by: ubun
1 Replies

6. Homework & Coursework Questions

Homework

plz i need code to search about numbers like this : 962785785698 962795565488 962785321565 962777321684 962795979515 i need code to detect just numbers start with "96278" i need it in awk !! thanks (1 Reply)
Discussion started by: eyad mohammad
1 Replies

7. Homework & Coursework Questions

Homework Help

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: 2. Relevant commands, code, scripts, algorithms: Write a command to display lines ending with the... (1 Reply)
Discussion started by: elh009
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 10:54 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy