Bash tcsh Script runs in terminal but not folder Post: 302963224

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Top Forums Shell Programming and Scripting Bash tcsh Script runs in terminal but not folder Post 302963224 by sea on Saturday 26th of December 2015 06:06:14 AM

12-26-2015

Registered User

With #!/bin/bash aka shebang, you declare the script to be bash.
By starting the very same script with tcsh ./script.sh, you overwrite the bash-shebang to be tcsh.

So if the script fails beeing executed by itself, with a bash-shebang, it is not bash.
Changing the shebang to #!/bin/tcsh should do the trick.

This way, if executable flag is set, it can also be executed like:

Code:

./script.sh
/path/to/script.sh

For most scripts you'll find either none or .sh file extension.
.sh in this scenario usualy just means 'shell', and that script should contain a shebang, otherwise it simply assumes to be the same shell as the current environment shell.

Know that many, if not all, distro's have /bin/sh symlinked to their specific default shell.
Which in most cases could be either: bash, dash, ksh or zsh.
So going with #!/bin/sh can result in unexpected behaviour when the script is shared.

Scripts without a shebang, should then have their shell/-name as extension, eg: .bash .dash .tcsh
When sharing, most forums to not support 'variant' file extensions to attach, and limit scripts to ".sh", which therefor requires scripts to have the proper shebang set.

My 2 cents, hth

sea

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LEARN ABOUT DEBIAN

surfraw-update-path

SURFRAW-UPDATE-PATH(1)					User Contributed Perl Documentation				    SURFRAW-UPDATE-PATH(1)

NAME

       surfraw-update-path - updates PATH in shell config files

SYNOPSIS

       surfraw-update-path [-add] [-remove] [-check] [-sys] [-all] [-help] [-shell=SHELL]

DESCRIPTION

       surfraw-update-path adds the surfraw elvi directory (/usr/lib/surfraw) to your PATH in your shell's config file.

       Currently it supports bash, sh, csh, tcsh, ash, dash, ksh, pdksh, zsh, rc, and es

       Don't forget to login again or source your login files for it to take effect.

OPTIONS

       -check
	   Checks to see if the surfraw config code is present.  This is the default.

       -add
	   Adds the surfraw config code.

       -remove
	   Removes the surfraw config code

       -sys
	   Updates the system-wide shell config instead of the user.  Must be done as root.

       -shell=SHELL
	   Selects the shell to configure. Defaults to the value of the $SHELL environment variable.

	   Currently supported shells are:

	   sh, ash, bash, dash, csh, tcsh, ksh, pdksh, zsh, rc, and es.

       -all
	   Attempts to configure the startup files for all known shells

       -help
	   Gives a usage message

RETURN VALUE

       -check returns 0 if the surfraw code is present in the file, 1 if it is not found, or 2 on error.

       All other options return 0 on success, or 2 on error.

ENVIRONMENT

       SHELL
	   Used to determine which shell to configure, if -shell is not given.

       HOME
	   Used to find users config files.

       ENV Used by posix-compliant shells to specify a startup rc file.

       ZDOTDIR
	   Used to find user config files for zsh. If not set, defaults to HOME.

SEE ALSO

       surfraw(1), sh(1), ash(1), bash(1), dash(1), csh(1), tcsh(1), ksh(1), pdksh(1), zsh(1), rc(1), es(1)

AUTHOR

       Ian Beckwith <ianb@erislabs.net>

perl v5.12.4							    2011-07-12						    SURFRAW-UPDATE-PATH(1)

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