47 lines
1.4 KiB
Bash
Executable file
47 lines
1.4 KiB
Bash
Executable file
#!/bin/bash
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# normdate--Normalizes month field in date specification to three letters,
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# first letter capitalized. A helper function for Script #7, valid-date.
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# Exits with 0 if no error.
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monthNumToName()
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{
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# Sets the 'month' variable to the approrpriate value.
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case $1 in
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1 ) month="Jan" ;; 2 ) month="Feb" ;;
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3 ) month="Mar" ;; 4 ) month="Apr" ;;
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5 ) month="May" ;; 6 ) month="Jun" ;;
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7 ) month="Jul" ;; 8 ) month="Aug" ;;
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9 ) month="Sep" ;; 10 ) month="Oct" ;;
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11 ) month="Nov" ;; 12 ) month="Dec" ;;
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* ) echo "$0: Unknown month value $1" >&2
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exit 1
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esac
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return 0
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}
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# BEGIN MAIN SCRIPT--DELETE OR COMMENT OUT EVERYTHING BELOW THIS LINE IF
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# YOU WANT TO INCLUDE THIS IN OTHER SCRIPTS.
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# =================
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# Input validation
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if [ $# -ne 3 ] ; then
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echo "Usage: $0 month day year" > &2
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echo "Formats are August 3 1962 and 8 3 1962" >&2
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exit 1
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fi
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if [ $3 -le 99 ] ; then
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echo "$0: expected 4-digit year value." >&2
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exit 1
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fi
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# Is the month input format a number?
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if [ -z $(echo $1|sed 's/[[:digit:]]//g') ] ; then
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monthNumToName $1
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else
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# Normalize to first 3 letters, first upper- and then lowercase.
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month="$(echo $1|cut -c1|tr '[:lower:]' '[:upper:]')"
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month="$month$(echo $1|cut -c2-3 | tr '[:upper:]' '[:lower:]')"
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fi
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echo $month $2 $3
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exit 0
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