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author | Tom Ryder <tom@sanctum.geek.nz> | 2016-08-09 11:19:29 +1200 |
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committer | Tom Ryder <tom@sanctum.geek.nz> | 2016-08-09 11:19:29 +1200 |
commit | c80b70a994983f3ac56e73407f2a534993843c0f (patch) | |
tree | 8e1921d1666b65b04e23914359f47815e4813866 /bin/maybe | |
parent | Add issue grizzling about pandoc(1) (diff) | |
download | dotfiles-c80b70a994983f3ac56e73407f2a534993843c0f.tar.gz dotfiles-c80b70a994983f3ac56e73407f2a534993843c0f.zip |
Rename myb(1) back to maybe(1)
Changed my mind again
Diffstat (limited to 'bin/maybe')
-rwxr-xr-x | bin/maybe | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/bin/maybe b/bin/maybe new file mode 100755 index 00000000..86785a45 --- /dev/null +++ b/bin/maybe @@ -0,0 +1,24 @@ +#!/bin/sh +# Exit with success or failure with a given probability +self=maybe + +# Figure out numerator and denominator from arguments +case $# in + 0) num=1 den=2 ;; + 1) num=1 den=$1 ;; + 2) num=$1 den=$2 ;; + *) + printf >&2 '%s: Unexpected arguments\n' "$self" + exit 2 + ;; +esac + +# Numerator must be zero or greater, denominator must be 1 or greater +if [ "$((num >= 0 || den >= 1))" -ne 1 ] ; then + printf >&2 '%s: Illegal numerator/denominator %s\n' "$self" + exit 2 +fi + +# Perform the test; that's our exit value +seed=$(rnds) +test "$(rndi 1 "$den" "$seed")" -le "$num" |