os1 week 5 af

3 files changed, 118 insertions, 0 deletions

diff --git a/os1w5/lettercount.sh b/os1w5/lettercount.sh
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+++ b/os1w5/lettercount.sh
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+#!/bin/sh
+
+usage() {
+	echo "usage: $0 <file> <letter1> [letter2] [letter3] [...]"
+	exit 1
+}
+
+[[ ! -f "$1" ]] && echo "file does not exist" && usage
+[[ "$#" -lt 2 ]] && echo "not enough arguments" && usage
+
+file="$1"
+shift
+for letter in "$@"; do
+	[[ ! "${#letter}" -eq 1 ]] && echo "argument \"$letter\" too long" && usage
+	echo "$letter -> `cat $file | tr -cd $letter | wc -c`"
+done
+
diff --git a/os1w5/practicum.md b/os1w5/practicum.md
new file mode 100644
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+++ b/os1w5/practicum.md
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+# practicum week 5
+
+## 1
+
+```bash
+find ~
+```
+
+## 2
+
+```bash
+find ~ -type f
+```
+
+## 3
+
+```bash
+find . -type f -mtime 1
+```
+
+## 4
+
+```bash
+find . -type f -exec wc -l {} \; | awk '$1 > 5 { print $2 }'
+```
+
+## 5
+
+```bash
+$ ./textfrutter.sh -l -p "volgende argument is: " -v Bob Koen Bart
+volgende argument is: bb
+volgende argument is: kn
+volgende argument is: brt
+```
+
+## 6
+
+```bash
+$ ./lettercount.sh practicum.md a e u i o
+a -> 12
+e -> 23
+u -> 6
+i -> 11
+o -> 6
+$ ./lettercount.sh practicum.md
+not enough arguments
+usage: ./lettercount.sh <file> <letter1> [letter2] [letter3] [...]
+$
+```
diff --git a/os1w5/textfrutter.sh b/os1w5/textfrutter.sh
new file mode 100755
index 0000000..8c8ffe3
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+++ b/os1w5/textfrutter.sh
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+#!/bin/dash
+TO_UPPER=""
+TO_LOWER=""
+PREFIX=
+SUFFIX=
+FILTER_VOWELS=""
+ARGC=0
+
+usage() {
+	cat << EOF
+usage: $0 [-luvh] [-p prefix] [-s suffix] [inputs...]
+
+options:
+  -l         convert inputs to lowercase
+  -u         convert inputs to uppercase
+  -v         remove vowels from inputs
+  -h         show help
+  -p prefix  add \`prefix\` to each line before inputs
+  -s suffix  add \`suffix\` to each line after inputs
+
+notes:
+  if -l and -u are specified at the same time, the lowercase option will have
+  precedence
+EOF
+  exit $1
+}
+
+while getopts dulhp:s:v OPT; do
+	[ $OPTIND -gt $ARGC ] && ARGC=$OPTIND
+	case $OPT in
+		u) TO_UPPER="y" ;;
+		l) TO_LOWER="y" ;;
+		h) usage 0 ;;
+		p) PREFIX=$OPTARG ;;
+		s) SUFFIX=$OPTARG ;;
+		v) FILTER_VOWELS="y" ;;
+		\?|*) usage 1 ;;
+	esac
+done
+
+[ $(( $# - $ARGC )) -lt 0 ] && echo "please provide some input" && usage 1
+
+shift $(( ARGC - 1 ))
+
+while [ -n "$1" ]; do
+	OUT="$1"
+	[ -n "$TO_UPPER" ] && OUT="`echo "$OUT" | sed 's/./\U\0/g'`"
+	[ -n "$TO_LOWER" ] && OUT="`echo "$OUT" | sed 's/./\L\0/g'`"
+	[ -n "$FILTER_VOWELS" ] && OUT="`echo "$OUT" | sed 's/[aeuio]//g'`"
+	echo "$PREFIX$OUT$SUFFIX"
+	shift
+done