diff options
author | Tom Ryder <tom@sanctum.geek.nz> | 2017-04-05 20:06:39 +1200 |
---|---|---|
committer | Tom Ryder <tom@sanctum.geek.nz> | 2017-04-05 20:46:47 +1200 |
commit | c8ab406749124d2e762ad5cf53963070113afd0f (patch) | |
tree | 54c9721a06957ebe7098a211eea803b0230c0f5d /bin/rnda.sh | |
parent | Handle POSIX correctness in ~/.bash_profile (diff) | |
download | dotfiles-c8ab406749124d2e762ad5cf53963070113afd0f.tar.gz dotfiles-c8ab406749124d2e762ad5cf53963070113afd0f.zip |
Apply runtime shebanging to POSIX shell
Diffstat (limited to 'bin/rnda.sh')
-rw-r--r-- | bin/rnda.sh | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/bin/rnda.sh b/bin/rnda.sh new file mode 100644 index 00000000..b09a8b6f --- /dev/null +++ b/bin/rnda.sh @@ -0,0 +1,19 @@ +# Choose a random argument using rndi(1df) + +# Check we have at least one argument +if [ "$#" -eq 0 ] ; then + printf >&2 'rnda: No args given\n' + exit 2 +fi + +# Get a random seed from rnds(1df); if it's empty, that's still workable +seed=$(rnds) + +# Get a random integet from 1 to the number of arguments +argi=$(rndi 1 "$#" "$seed") || exit + +# Shift until that argument is the first argument +shift "$((argi-1))" + +# Print it +printf '%s\n' "$1" |