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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-05 18:33:23 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-05 18:33:23 +0000
commit1d5cace9db9aef76f26b2d7ba54bbb76443b00b2 (patch)
tree314a15dd1aa103da13bdc83ba1d2105a290bc5ba /examples/functions/sort-pos-params
parentInitial commit. (diff)
downloadbash-upstream.tar.xz
bash-upstream.zip
Adding upstream version 5.0.upstream/5.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'examples/functions/sort-pos-params')
-rw-r--r--examples/functions/sort-pos-params69
1 files changed, 69 insertions, 0 deletions
diff --git a/examples/functions/sort-pos-params b/examples/functions/sort-pos-params
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+#
+# Chet Ramey <chet.ramey@case.edu>
+#
+# Copyright 2001 Chester Ramey
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# TThis program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+# Sort the positional paramters.
+# Make sure the positional parameters are passed as arguments to the function.
+# If -u is the first arg, remove duplicate array members.
+sort_posparams()
+{
+ local -a R
+ local u
+
+ case "$1" in
+ -u) u=-u ; shift ;;
+ esac
+
+ # if you want the case of no positional parameters to return success,
+ # remove the error message and return 0
+ if [ $# -eq 0 ]; then
+ echo "$FUNCNAME: argument expected" >&2
+ return 1
+ fi
+
+ # make R a copy of the positional parameters
+ R=( "${@}" )
+
+ # sort R.
+ R=( $( printf "%s\n" "${R[@]}" | sort $u) )
+
+ printf "%s\n" "${R[@]}"
+ return 0
+}
+
+# will print everything on separate lines
+set -- 3 1 4 1 5 9 2 6 5 3 2
+sort_posparams "$@"
+
+# sets without preserving quoted parameters
+set -- $( sort_posparams "$@" )
+echo "$@"
+echo $#
+
+# sets preserving quoted parameters, beware pos params with embedded newlines
+set -- 'a b' 'a c' 'x z'
+
+oifs=$IFS
+IFS=$'\n'
+set -- $( sort_posparams "$@" )
+IFS="$oifs"
+
+echo "$@"
+echo $#
+
+sort_posparams