| #!/bin/sh |
| |
| candidate="$1" |
| |
| tar=`which $candidate` |
| if [ ! -x "$tar" ]; then |
| tar=`which tar` |
| if [ ! -x "$tar" ]; then |
| # echo nothing: no suitable tar found |
| exit 1 |
| fi |
| fi |
| |
| # Output of 'tar --version' examples: |
| # tar (GNU tar) 1.15.1 |
| # tar (GNU tar) 1.25 |
| version=`$tar --version | head -n 1 | sed 's/^.*\s\([0-9]\+\.\S\+\).*$/\1/'` |
| major=`echo "$version" | cut -d. -f1` |
| minor=`echo "$version" | cut -d. -f2` |
| bugfix=`echo "$version" | cut -d. -f3` |
| |
| # Minimal version = 1.17 (previous versions do not correctly unpack archives |
| # containing hard-links if the --strip-components option is used). |
| major_min=1 |
| minor_min=17 |
| if [ $major -gt $major_min ]; then |
| echo $tar |
| else |
| if [ $major -eq $major_min -a $minor -ge $minor_min ]; then |
| echo $tar |
| else |
| # echo nothing: no suitable tar found |
| exit 1 |
| fi |
| fi |
