Write a program called isyes that returns an exit status of 0 if its argument is "yes" and 1 otherwise. For purposes of this exercise, consider y, yes, Yes, YES, and Y all to be valid "yes" arguments: -sh-4.1$ ./isyes yes -sh-4.1$ echo $? 0 |-sh-4.1$

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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Using bash shell/Linux

Write a program called isyes that returns an exit status of O if its argument is "yes" and 1
otherwise. For purposes of this exercise, consider y, yes, Yes, YES, and Y all to be valid "yes"
arguments:
|-sh-4.1$ ./isyes yes
|-sh-4.1$ echo $?
|0
|-sh-4.1$
Transcribed Image Text:Write a program called isyes that returns an exit status of O if its argument is "yes" and 1 otherwise. For purposes of this exercise, consider y, yes, Yes, YES, and Y all to be valid "yes" arguments: |-sh-4.1$ ./isyes yes |-sh-4.1$ echo $? |0 |-sh-4.1$
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