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Full Discussion: Convert a bash to ash
Operating Systems Linux Ubuntu Convert a bash to ash Post 302936520 by Scrutinizer on Thursday 26th of February 2015 06:11:09 AM
Old 02-26-2015
That looks a bit garbled, this should be:
Code:
[ ! -z "$PS1" ]

Note the spaces around the brackets...

which is equivalent to
Code:
[ -n "$PS1" ]

or
Code:
[ "$PS1" ]

But the logical counterpart of [ ! -t 0 ] would be [ -z "$PS1" ]

However,
Code:
[ ! -t 0 ]

is part of Posix so this should just work in ash. So I do not think this is a bash vs. ash matter.
If it does not work in a certain application, then it should also not work in the case of bash, unless your ash version has a bug...

Last edited by Scrutinizer; 02-26-2015 at 09:39 AM..
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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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