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Diffstat (limited to '')
| -rw-r--r-- | examples/functions/isvalidip | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/examples/functions/isvalidip b/examples/functions/isvalidip new file mode 100644 index 0000000..0b2dafe --- /dev/null +++ b/examples/functions/isvalidip @@ -0,0 +1,14 @@ +# Thanks to Chris F. A. Johnson <c.f.a.johnson@rogers.com> for this one +is_validip() +{ + case "$*" in + ""|*[!0-9.]*|*[!0-9]) return 1 ;; + esac + + local IFS=. + set -- $* + + [ $# -eq 4 ] && + [ ${1:-666} -le 255 ] && [ ${2:-666} -le 255 ] && + [ ${3:-666} -le 255 ] && [ ${4:-666} -le 254 ] +} |