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Top Forums Shell Programming and Scripting The Start Of A Simple Audio Scope Shell Script... Post 302756321 by Scrutinizer on Tuesday 15th of January 2013 03:21:13 PM
Old 01-15-2013
Simple example. If the interactive shell is ksh for example, then your script will not run correctly:
Code:
$ ksh
$ ./AudioScopeDisplay.sh
./AudioScopeDisplay.sh: line 10: syntax error at line 41: `(' unexpected
$

If you use the correct shebang, then it will run.

Also if you use #!/bin/sh on Ubuntu for example, it will not work...
On other linux distributions #!/bin/sh calls bash --posix which also will not always work like bash.
If you use a shebang then it should call the shell that the script is supposed to work with..

Last edited by Scrutinizer; 01-15-2013 at 04:43 PM..
This User Gave Thanks to Scrutinizer For This Post:
 

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SHCOMP(1)						    User Environment Utilities							 SHCOMP(1)

NAME
shcomp - compile a ksh93 shell script SYNOPSIS
shcomp [ options ] [infile] [outfile]] ORIGIN OF THIS MAN PAGE
This man page was written by Christophe Martin <Schplurtz@free.fr> for the Debian GNU/Linux system. It is based on "shcomp --man" output. DESCRIPTION
Unless -D is specified, shcomp takes a shell script, infile, and creates a binary format file, outfile, that ksh93 can read and execute with the same effect as the original script. Since aliases are processed as the script is read, alias definitions whose value requires variable expansion will not work correctly. If -D is specified, all double quoted strings that are preceded by $ are output. These are the messages that need to be translated to locale specific versions for internationalization. If outfile is omitted, then the results will be written to standard output. If infile is also omitted, the shell script will be read from standard input. OPTIONS
-D, --dictionary Generate a list of strings that need to be placed in a message catalog for internationalization. -n, --noexec Displays warning messages for obsolete or non-conforming constructs. -v, --verbose Displays input from infile onto standard error as it reads it. --man Displays this man page on standard error and exits. --help Shows a short help message and exits. EXIT STATUS
0 Successful completion. >0 An error occurred. DEBIAN WARNING
On a Debian GNU/Linux system, more than one package may provide ksh. the output of shcomp can only be used by ksh93. Any other ksh will be unable to run the compiled script. EXAMPLE
( echo '#! /bin/ksh93' ; shcomp myscript ) > myscript.bin && chmod 755 myscript.bin ./myscript.bin SEE ALSO
ksh(1) IMPLEMENTATION
version shcomp (AT&T Labs Research) 2003-03-02 author David Korn <dgk@research.att.com> copyright Copyright (c) 1982-2005 AT&T Corp. license http://www.opensource.org/licenses/cpl1.0.txt KSH93 Fri Jun 3 2005 SHCOMP(1)
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