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Top Forums Shell Programming and Scripting Condition checking issue while if Post 302834545 by wisecracker on Friday 19th of July 2013 07:56:55 AM
Old 07-19-2013
If you are not sure do an example longhand to get your head around it!

An example:-
Code:
#!/bin/bash --posix
# if_then.sh
end_ct="END DOG"
emtr_cnt=0
# If first is correct _OR_ second is correct...
if [ "$end_ct" == "END CAT" ] || [ $emtr_cnt -eq 1 ]
then
	echo "Woohoo at least one works..."
else
	echo "Neither are correct!!!"
fi
# The first result will be "Neither are correct!!!"
# Now change one or both of the two variables to a correct value and rerun!

Change one or both of the variables to the correct value and rerun...
Code:
Last login: Fri Jul 19 12:48:00 on ttys000
AMIGA:barrywalker~> ./if_then.sh
Neither are correct!!!
AMIGA:barrywalker~>

 

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BPECHO(1)							  BP executables							 BPECHO(1)

NAME
bpecho - Bundle Protocol reception test program SYNOPSIS
bpecho ownEndpointId DESCRIPTION
bpecho uses Bundle Protocol to receive application data units from a remote bpdriver application task. In response to each received application data unit it sends back an "echo" application data unit of length 2, the NULL-terminated string "x". bpecho terminates upon receiving the SIGQUIT signal, i.e., ^C from the keyboard. EXIT STATUS
0 bpecho has terminated normally. Any problems encountered during operation will be noted in the ion.log log file. 1 bpecho has terminated due to a BP reception failure. Details should be noted in the ion.log log file. FILES
No configuration files are needed. ENVIRONMENT
No environment variables apply. DIAGNOSTICS
Diagnostic messages produced by bpecho are written to the ION log file ion.log. Can't attach to BP. bpadmin has not yet initialized Bundle Protocol operations. Can't open own endpoint. Another application has already opened ownEndpointId. Terminate that application and rerun. bpecho bundle reception failed. BP system error. Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun. No space for ZCO extent. ION system error. Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun. Can't create ZCO. ION system error. Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun. bpecho can't send echo bundle. BP system error. Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun. BUGS
Report bugs to <ion-bugs@korgano.eecs.ohiou.edu> SEE ALSO
bpadmin(1), bpdriver(1), bpcounter(1), bp(3) perl v5.14.2 2012-05-25 BPECHO(1)
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