Feat(bash_prompt): Set default value for `$COLUMNS` to 80

diff --git a/admin/prog/bash_prompt b/admin/prog/bash_prompt
index a60560240e3d53c8e5901ee5de4450a353432077..14543705585b52f6ed8d8de2f54a1d0cd7466c5c 100644 (file)
--- a/admin/prog/bash_prompt
+++ b/admin/prog/bash_prompt
@@ -7,7 +7,7 @@ cgmem_which_prompt() {
 }
 
 # Cut directories to 20% of the terminal width; add space for 3 dots
-_DIR_LENGTH=`awk "END { print int(0.2 * $COLUMNS) }" </dev/null`
+_DIR_LENGTH=`awk "END { print int(0.2 * ${COLUMNS:-80}) }" </dev/null`
 _DIR_LENGTH_DOTS=`expr $_DIR_LENGTH + 3`
 
 short_curdir() {