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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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getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME
getusershell, setusershell, endusershell - get legal user shells SYNOPSIS
#include <unistd.h> char *getusershell(void); void setusershell(void); void endusershell(void); DESCRIPTION
The getusershell() function returns a pointer to a legal user shell as defined by the system manager in the file /etc/shells. If /etc/shells does not exist, the following locations of the standard system shells are used in its place: /bin/bash /bin/csh /bin/jsh /bin/ksh /bin/ksh93 /bin/pfcsh /bin/pfksh /bin/pfsh /bin/sh /bin/tcsh /bin/zsh /sbin/jsh /sbin/pfsh /sbin/sh /usr/bin/bash /usr/bin/csh /usr/bin/jsh /usr/bin/ksh /usr/bin/ksh93 /usr/bin/pfcsh /usr/bin/pfksh /usr/bin/pfsh /usr/bin/sh /usr/bin/tcsh /usr/bin/zsh /usr/sfw/bin/zsh /usr/xpg4/bin/sh The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells. The setusershell() function rewinds the file or the list. The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells. RETURN VALUES
The getusershell() function returns a null pointer on EOF. BUGS
All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved. NOTES
Restricted shells should not be listed in /etc/shells. SunOS 5.11 1 Nov 2007 getusershell(3C)
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