Сценарии командной оболочки. Linux, OS X и Unix. 2-е издание

····echo "$0: cannot write in your home directory ($HOME)" >&2

····exit 1

··fi

··echo "Agenda: The Unix Reminder Service"

··/bin/echo −n "Date of event (day mon, day month year, or dayname): "

··read word1 word2 word3 junk

··if isDayName $word1; then

····if [! -z "$word2"]; then

······echo "Bad dayname format: just specify the day name by itself." >&2

······exit 1

····fi

····date="$(normalize $word1)"

··else

····if [-z "$word2"]; then

······echo "Bad dayname format: unknown day name specified" >&2

······exit 1

····fi

····if [! -z "$(echo $word1|sed 's/[[: digit: ]]//g')"]; then

······echo "Bad date format: please specify day first, by day number" >&2

········exit 1

····fi

····if ["$word1" −lt 1 −o "$word1" −gt 31]; then

······echo "Bad date format: day number can only be in range 1-31" >&2

······exit 1

····fi

····if [! isMonthName $word2]; then

······echo "Bad date format: unknown month name specified." >&2

······exit 1

····fi

····word2="$(normalize $word2)"

····if [-z "$word3"]; then

······date="$word1$word2"

····else

······if [! -z "$(echo $word3|sed 's/[[: digit: ]]//g')"]; then

········echo "Bad date format: third field should be year." >&2

········exit 1

······elif [$word3 −lt 2000 −o $word3 −gt 2500]; then

········echo "Bad date format: year value should be 2000–2500" >&2

········exit 1

······fi

······date="$word1$word2$word3"

····fi

··fi

··/bin/echo −n "One-line description: "

··read description

··# Данные готовы к записи в файл

··echo "$(echo $date|sed 's/ //g')|$description" >> $agendafile

··exit 0

Второй сценарий, в листинге 3.13, короче, но используется чаще.

Листинг 3.13. Сценарий agenda, сопутствующий сценарию addagenda из листинга 3.12

··#!/bin/sh

··# agenda — сканирует файл. agenda в поисках записей, относящихся

··#·· к текущей дате

··agendafile="$HOME/.agenda"

··checkDate()

··{

····# Создать значения по умолчанию для сопоставления с текущей датой.

····weekday=$1 day=$2 month=$3 year=$4

····format1="$weekday" format2="$day$month" format3="$day$month$year"

····# И выполнить поиск среди записей в файле…

····IFS="|" # Команда read автоматически разбивает

············#·· прочитанные строки по символам в IFS.

····echo "On the agenda for today: "

····while read date description; do

······if ["$date" = "$format1" −o "$date" = "$format2" −o \

·········· "$date" = "$format3"]

······then

········echo " $description"

······fi

····done < $agendafile

··}

··if [! -e $agendafile]; then

····echo "$0: You don't seem to have an.agenda file. " >&2

····echo "To remedy this, please use 'addagenda' to add events" >&2

····exit 1

··fi

··# Получить текущую дату…