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|
#!/bin/rc
rfork e
smon='s/Jan/01/
s/Feb/02/
s/Mar/03/
s/Apr/04/
s/May/05/
s/Jun/06/
s/Jul/07/
s/Aug/08/
s/Sep/09/
s/Oct/10/
s/Nov/11/
s/Dec/12/'
fn usage {
echo 'usage: yesterday [-abcCdDs] [-[[[yy]yy]mm]dd] [-n daysago] file ...' >[1=2]
exit 'usage'
}
fn Xcp {
echo cp $1 $2
cp $1 $2
}
fn Xdiff {
echo diff $1 $2
diff $1 $2
}
fn Xdiffn {
echo diff -n $1 $2
diff -n $1 $2
}
fn Xadiff {
echo /acme/bin/adiff $1 $2
/acme/bin/adiff $1 $2
}
fn Xcarefulcp {
if(! cmp -s $1 $2) Xcp $1 $2
}
fn Xecho {
echo $1
}
fn Xbind {
echo bind $1 $2
bind $1 $2
}
year=`{date|sed 's/.* //'}
copy=Xecho
last=()
defdump=dump
while(! ~ $#* 0 && ~ $1 -* && ! ~ $1 --){
switch($1){
case -a
copy=Xadiff
shift
case -b
copy=Xbind
shift
case -c
copy=Xcp
shift
case -d
copy=Xdiff
shift
case -D
copy=Xdiffn
shift
case -C
copy=Xcarefulcp
shift
case -s
defdump=snap
shift
case -n*
if(~ $1 -n){
if(~ $#* 1)
usage
shift
days=$1
}
if not
days=`{echo $1 | sed 's/^-.//'}
last=`{date `{hoc -e `{date -n} ^ '-'$days'*60*60*24'} | \
sed -e 's%... (...) (..) ..:..:.. ... (....)%\3/\1\2%' -e 'y/ /0/' -e $smon}
shift
case -?
mon=`{date|sed -e 's/^....(...).*/\1/' -e $smon}
last=$year/$mon ^`{echo $1|sed 's/^-/0/'}
shift
case -??
mon=`{date|sed -e 's/^....(...).*/\1/' -e $smon}
last=$year/$mon ^`{echo $1|sed 's/^-//'}
shift
case -????
last=$year/ ^ `{echo $1|sed 's/^-//'}
shift
case -??????
last=`{echo $year|sed 's/..$//'} ^ `{echo $1|sed 's/^-(..)/\1\//'}
shift
case -????????
last=`{echo $1|sed 's/^-(....)/\1\//'}
shift
case *
usage
}
}
if(! ~ $#* 0 && ~ $1 --)
shift
if(~ $#* 0)
usage
dir=`{pwd}
if(! ~ $status ''){
echo 'yesterday: can''t find directory' >[1=2]
exit 'pwd failed'
}
for(i){
xpath=`{cleanname -d $dir -- $i}
xdump=$defdump
dumppath=$xpath
if(~ $xpath /n/*/*){
xdump=`{echo $xpath | sed 's:/n/([^/]+)/.*:\1'$defdump':'}
dumppath=`{echo $xpath | sed 's:/n/[^/]+(/.*):\1:'}
}
if(! test -e /n/$xdump/$year)
9fs $xdump
if(~ $#last 0){
xlast=`{ls /n/$xdump/$year|sed -n '$p'}
switch($defdump){
case snap
xlast=`{ls $xlast|sed -n '$p'}
}
}
if not
xlast=/n/$xdump/$last
if(! test -e $xlast){
echo 'yesterday:' \
`{echo $xlast|sed 's/.n.'$defdump'.(....).(..)(..)/\1 \2 \3/'} \
'is not a backup day for' $xdump >[1=2]
exit 'bad date'
}
$copy $xlast^$dumppath $xpath
}
exit ''
|
