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Full Discussion: Scripts without shebang
Top Forums Shell Programming and Scripting Scripts without shebang Post 302694907 by Corona688 on Friday 31st of August 2012 03:27:20 PM
Old 08-31-2012
eneric Bourne doesn't have to support [[ ]]. Some do, some don't, so if you don't know what shell you're going to get, limit yourself to [ ] .

You should also have a blank line as the first line of the script, in case your first line accidentally ends up being a command. [ is a command for instance.

So, really, I reccomend having a shebang even if you don't plan on using it, just in case someone else does, and to at least document which variety of shell is preferred for it.

Code:
#!/bin/sh

[ 1 -eq 1 ] && echo yes || echo no


Last edited by Corona688; 08-31-2012 at 04:32 PM..
 

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RESIZE(1)						      General Commands Manual							 RESIZE(1)

NAME
resize - set TERMCAP and terminal settings to current xterm window size SYNOPSIS
resize [ -u | -c ] [ -s [ row col ] ] DESCRIPTION
Resize prints a shell command for setting the TERM and TERMCAP environment variables to indicate the current size of xterm window from which the command is run. For this output to take effect, resize must either be evaluated as part of the command line (usually done with a shell alias or function) or else redirected to a file which can then be read in. From the C shell (usually known as /bin/csh), the follow- ing alias could be defined in the user's .cshrc: % alias rs 'set noglob; eval `resize`' After resizing the window, the user would type: % rs Users of versions of the Bourne shell (usually known as /bin/sh) that don't have command functions will need to send the output to a tempo- rary file and the read it back in with the ``.'' command: $ resize > /tmp/out $ . /tmp/out OPTIONS
The following options may be used with resize: -u This option indicates that Bourne shell commands should be generated even if the user's current shell isn't /bin/sh. -c This option indicates that C shell commands should be generated even if the user's current shell isn't /bin/csh. -s [rows columns] This option indicates that Sun console escape sequences will be used instead of the special xterm escape code. If rows and columns are given, resize will ask the xterm to resize itself. However, the window manager may choose to disallow the change. FILES
/etc/termcap for the base termcap entry to modify. ~/.cshrc user's alias for the command. SEE ALSO
csh(1), tset(1), xterm(1) AUTHORS
Mark Vandevoorde (MIT-Athena), Edward Moy (Berkeley) Copyright (c) 1984, 1985 by X Consortium See X(1) for a complete copyright notice. BUGS
The -u or -c must appear to the left of -s if both are specified. X Version 11 Release 6.3 RESIZE(1)
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