06-04-2009
thanks.
i'm currently building my shell script based from all your information.
i'll let you know how it turns out.
10 More Discussions You Might Find Interesting
1. Programming
Hi,
I am a student and I want to create a shell in C language.
The shell must be able to take commands(with arguments) from the user and execute them and show the results. Any help or ideas or any suggestions would be greatly appreciated.
Thanks (4 Replies)
Discussion started by: passat
4 Replies
2. Shell Programming and Scripting
Can some one smart here help I need to create a shell script that does this below using vi editor.
decrypts a file (specified as an argument to the script) containing text which was encrypted using the ROT-13 algorithm. The decrypted text should be written to a new file leaving the input file... (1 Reply)
Discussion started by: master_6ez
1 Replies
3. Shell Programming and Scripting
I have an assignment in my programming class to write a shell script that will use command line parameters, display the # of parameters, display all parameters on the command line and display the parameters $0-$9. I understand some of the code (I will be using 'n' to represent the count through... (1 Reply)
Discussion started by: plmahan
1 Replies
4. UNIX for Advanced & Expert Users
Hi, i'm newbie in Unix.
How can i create my own database in unix shell?
Not to create a database through shell to MySql, oracle etc, but to create a completely mine database system through shell.
Please help me, give me directions, i'm desperate :( (1 Reply)
Discussion started by: vants
1 Replies
5. Shell Programming and Scripting
In OS X I'm currently writing a bash script that requires writing to preference file. I may eventually want to share it with users on other Unix-like OSs and would like to accommodate for that possibility ahead of time.
Most OS X applications save preferences in xml-format plist files. These... (4 Replies)
Discussion started by: airsmurf
4 Replies
6. Shell Programming and Scripting
Hi, I'm new to UNIX shell programming... can anyone help in doing the following :
1) create a text file named "Model File" having following columns :
Name Number Physics Chemistry
2) prompt user to n rows enter the name, number, physics ,chemistry
3) display the entire columns and rows... (1 Reply)
Discussion started by: Mayuri P R
1 Replies
7. Shell Programming and Scripting
echo -e "Enter in a username : \c"
read username
grep "^$username:" /etc/passwdWhat I'm trying to do is take in a username from my script and I need to be able to check if that username already exists. If it does the script should display a message saying that the user already exists and exit.
... (2 Replies)
Discussion started by: shadowcat
2 Replies
8. Shell Programming and Scripting
Hi,
I need help in creating a array in shell scirpt.
I have a file which has following details.
hostname devices
device1
device 2
de
abcdmhs10 1234
2343
2353
3343
3435
2343
bcdfmhs11 2343
2443
3434
8874
0343
3434 (5 Replies)
Discussion started by: jpkumar10
5 Replies
9. Shell Programming and Scripting
If there's a file called example.txt with contents:
Foo
Bar
Baz
Goo
then I need to generate a shell script that has commands to reconstruct example.txt on another machine:
echo "Foo" >> example.txt
echo "Bar" >> example.txt
echo "Baz" >> example.txt
echo... (5 Replies)
Discussion started by: Yongfeng
5 Replies
10. Homework & Coursework Questions
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:
Write a shell script that accepts two arguments. The two arguments are the
name of 2 files.
• If the arguments... (3 Replies)
Discussion started by: Scripter12345
3 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)