diff options
| -rw-r--r-- | usr.sbin/bsdconfig/share/strings.subr | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/usr.sbin/bsdconfig/share/strings.subr b/usr.sbin/bsdconfig/share/strings.subr index 73da04c..aec62ed 100644 --- a/usr.sbin/bsdconfig/share/strings.subr +++ b/usr.sbin/bsdconfig/share/strings.subr @@ -51,6 +51,26 @@ f_substr() echo "$string" | awk "{ print substr(\$0, $start, $len) }" } +# f_snprintf $var_to_set $size $format ... +# +# Similar to snprintf(3), write at most $size number of bytes into $var_to_set +# using printf(1) syntax (`$format ...'). The value of $var_to_set is NULL +# unless at-least one byte is stored from the output. +# +f_snprintf() +{ + local __var_to_set="$1" __size="$2" + shift 2 # var_to_set/size + eval "$__var_to_set"=\$\( printf \"\$@\" \| awk -v max=\"\$__size\" \'' + { + len = length($0) + max -= len + print substr($0,0,(max > 0 ? len : max + len)) + if ( max < 0 ) exit + max-- + }'\' \) +} + # f_longest_line_length # # Simple wrapper to an awk(1) script to print the length of the longest line of |
