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| 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/rndf.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/rndf.sh')
| -rw-r--r-- | bin/rndf.sh | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/bin/rndf.sh b/bin/rndf.sh new file mode 100644 index 00000000..21aa76a6 --- /dev/null +++ b/bin/rndf.sh @@ -0,0 +1,17 @@ +# Choose a random file from a given directory using rnda(1df); ignores dot +# files + +# Directory is first argument; defaults to current directory +dir=${1:-.} + +# Set the positional parameters to all the non-dotfiles in that directory +set -- "$dir"/* + +# Check for an unexpanded glob (empty directory) +if ! [ -e "$1" ] ; then + printf >&2 'rndf: No files found in %s\n' "$dir" + exit 1 +fi + +# Print a random argument from the current positional parameters +rnda "$@" |