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Top Forums Shell Programming and Scripting How to auto correct a failing command? Post 302989910 by Corona688 on Thursday 19th of January 2017 05:30:15 PM
Old 01-19-2017
See, I don't think that actually helps you. There are systems where echo -e literally prints -e. Theoretically this script could detect and warn you when your code is broken, but it doesn't actually make your code portable. There's places -e is needed, places it's not, and places where echo never does what you want.

If you want your script to be portable, write it portably.

There is a command which handles escapes properly everywhere, in every shell: printf. Rewrite using printf instead of echo -e. Just a blind substitution won't work of course, you need to add an \n.

As an alternative for grep -o , awk.

Last edited by Corona688; 01-19-2017 at 06:36 PM..
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SHTOOL-PATH.TMP(1)					      GNU Portable Shell Tool						SHTOOL-PATH.TMP(1)

NAME
shtool-path - GNU shtool command dealing with shell path variables SYNOPSIS
shtool path [-s|--suppress] [-r|--reverse] [-d|--dirname] [-b|--basename] [-m|--magic] [-p|--path path] str [str ...] DESCRIPTION
This command deals with shell $PATH variables. It can find a program through one or more filenames given by one or more str arguments. It prints the absolute filesystem path to the program displayed on "stdout" plus an exit code of 0 if it was really found. OPTIONS
The following command line options are available. -s, --suppress Supress output. Useful to only test whether a program exists with the help of the return code. -r, --reverse Transform a forward path to a subdirectory into a reverse path. -d, --dirname Output the directory name of str. -b, --basename Output the base name of str. -m, --magic Enable advanced magic search for ""perl"" and ""cpp"". -p, --path path Search in path. Default is to search in $PATH. EXAMPLE
# shell script awk=`shtool path -p "${PATH}:." gawk nawk awk` perl=`shtool path -m perl` cpp=`shtool path -m cpp` revpath=`shtool path -r path/to/subdir` HISTORY
The GNU shtool path command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 1998 for Apache. It was later taken over into GNU shtool. SEE ALSO
shtool(1), which(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-PATH.TMP(1)
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