bash sourcesobs-product

1 files changed, 49 insertions, 0 deletions

diff --git a/scratch/bash-3.1/examples/scripts.v2/cal2day.bash b/scratch/bash-3.1/examples/scripts.v2/cal2day.bash
new file mode 100644
index 0000000..f26128b
--- /dev/null
+++ b/scratch/bash-3.1/examples/scripts.v2/cal2day.bash
@@ -0,0 +1,49 @@
+#!/bin/bash
+# cal2day - "parse" appropriate calendar output to match date number
+#	    with day name.
+#
+# usage: cal2day month day [year]
+#
+# ORIGINAL *TAG:33239 3:Dec 9 1997:0755:sh.d/cal2day:
+#
+# Obtained from usenet
+#
+# Converted to bash v2 syntax by Chet Ramey <chet@po.cwru.edu>
+
+#1 PARSE OPTIONS
+while getopts :dls _inst
+do	case $_inst in
+	(d)	format='%1d%.0s\n' ;;		# 0, 1, ..., 7
+	(l)	format='%0.s%-s\n' ;;		# Sunday, Monday, ..., Saturday
+	(s)	format='%0.s%-.3s\n' ;;		# Sun, Mon, ..., Sat
+	esac
+done
+shift $((OPTIND-1))
+
+#2 PARAMETER VALUES
+((!$#)) && set -- $(date '+%m %d')
+: ${format:='%0.s%-.3s\n'}
+: ${1:?missing month parameter [1-12]}
+: ${2:?missing day parameter [1-31]}
+
+#3 CALCULATE DAY-OF-WEEK FROM DATE
+cal $1 ${3:-$(date +%Y)} | gawk -FX '
+BEGIN	{ day="Sunday   Monday   Tuesday  WednesdayThursday Friday   Saturday"
+	  sub(/^0/, "", daynum)
+	  dayre="(^| )" daynum "( |$)"
+	}
+#NR==2	{ print length($0) }
+NR==1 || NR==2 \
+	{ next }
+dayre	{ if (match($0, dayre))
+	  {	#print RSTART, RLENGTH, substr($0, RSTART, RLENGTH)
+		if (daynum<=9 || RSTART==1) RSTART-=1
+		exit
+	  }
+	}
+END	{ # 20/21 char width assumed
+	  printf format, RSTART/3, substr(day, RSTART*3+1, 9)
+	}
+' daynum=$2 format=$format -
+
+exit 0