158 lines
2.7 KiB
Org Mode
158 lines
2.7 KiB
Org Mode
;;; Gash -- Guile As SHell
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;;; Copyright © 2016, 2017, 2018 R.E.W. van Beusekom <rutger.van.beusekom@gmail.com>
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;;; Copyright © 2018, 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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;;; Copyright © 2019 Timothy Sample <samplet@ngyro.com>
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;;;
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;;; This file is part of Gash.
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;;;
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;;; Gash is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation, either version 3 of the License, or
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;;; (at your option) any later version.
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;;;
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;;; Gash is distributed in the hope that it will be useful,
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;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with Gash. If not, see <http://www.gnu.org/licenses/>.
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* assignment-backtick
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:script:
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#+begin_src sh
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obj=ar.o
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objs="$objs `basename $obj`"
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echo "objs:>$objs<"
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#+end_src
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:stdout:
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#+begin_example
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objs:> ar.o<
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#+end_example
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* assignment-doublequoted-doublequotes
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:script:
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#+begin_src sh
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aliaspath=alias
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localedir=locale
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defines="-DALIASPATH=\"${aliaspath}\" -DLOCALEDIR=\"${localedir}\""
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echo cc $defines
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#+end_src
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:stdout:
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#+begin_example
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cc -DALIASPATH="alias" -DLOCALEDIR="locale"
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#+end_example
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* assignment-double-quote
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:script:
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#+begin_src sh
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srcdir="."
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#+end_src
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* assignment-echo
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:script:
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#+begin_src sh
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SHELL=/bin/bash
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echo $SHELL
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#+end_src
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:stdout:
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#+begin_example
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/bin/bash
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#+end_example
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* assignment-empty
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:script:
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#+begin_src sh
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a=
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echo a:$a
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#+end_src
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:stdout:
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#+begin_example
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a:
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#+end_example
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* assignment
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:script:
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#+begin_src sh
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SHELL=/bin/bash
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#+end_src
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* assignment-singlequote
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:script:
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#+begin_src sh
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srcdir='.'
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#+end_src
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* assignment-variable-word
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:script:
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#+begin_src sh
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SHELL=gash
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bin=${SHELL}/bin
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echo $bin
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#+end_src
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:stdout:
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#+begin_example
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gash/bin
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#+end_example
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* assignment-word-variable
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:script:
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#+begin_src sh
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SHELL=gash
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PATH=bin:${SHELL}
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echo $PATH
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#+end_src
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:stdout:
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#+begin_example
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bin:gash
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#+end_example
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* Assignments reset exit status
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:script:
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#+begin_src sh
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set +e
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false
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x=foobar
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#+end_src
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* Assigning exit status works
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:script:
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#+begin_src sh
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set +e
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false
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x=$?
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echo $x
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#+end_src
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:stdout:
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#+begin_example
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1
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#+end_example
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* Assignments use command substitutions for exit status
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:script:
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#+begin_src sh
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set +e
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x=$(false)
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echo $?
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x=$(true)
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echo $?
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#+end_src
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:stdout:
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#+begin_example
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1
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0
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#+end_example
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* Assignments update exit status on the fly
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:script:
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#+begin_src sh
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set +e
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false
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x=$? y=$(true) z=$?
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echo $x $z
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#+end_src
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:stdout:
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#+begin_example
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1 0
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#+end_example
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