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Diffstat (limited to 'challenge-112/abigail/bash/ch-1.sh')
| -rw-r--r-- | challenge-112/abigail/bash/ch-1.sh | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/challenge-112/abigail/bash/ch-1.sh b/challenge-112/abigail/bash/ch-1.sh new file mode 100644 index 0000000000..6f41950bc5 --- /dev/null +++ b/challenge-112/abigail/bash/ch-1.sh @@ -0,0 +1,41 @@ +#!/bin/sh + +# +# See ../README.md +# + +# +# Run as: bash ch-1.sh < input-file +# + +set -f + +IFS="/" + +while read -a i_parts +do declare -a o_parts + j=0 + for ((i = 0; i < ${#i_parts[@]}; i ++)) + do if [ "X${i_parts[$i]}" == "X" ] # Skip empty parts + then continue + fi + if [ "X${i_parts[$i]}" == "X." ] # Skip current directory + then continue + fi + if [ "X${i_parts[$i]}" == "X.." ] # Back up to parent directory + then if ((j > 0)) + then ((j --)) + fi + continue + fi + o_parts[$j]=${i_parts[$i]} # Copy part + ((j ++)) + done + if ((j == 0)) + then echo "/" # Root directory + else for ((k = 0; k < j; k ++)) # Canonical path + do printf "/%s" ${o_parts[$k]} + done + echo + fi +done |