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07e3d1c254
2 changed files with 65 additions and 5 deletions
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@ -6,6 +6,9 @@ vac, unvac \- create, extract a vac archive on Venti
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[
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.B -mqsv
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] [
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.B -a
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.I vacfile
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] [
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.B -b
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.I blocksize
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] [
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@ -23,12 +26,15 @@ vac, unvac \- create, extract a vac archive on Venti
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] [
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.B -h
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.I host
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] [
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.B -x
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.I excludefile
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]
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.I file ...
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.PP
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.B unvac
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[
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.B -Tctv
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.B -Tcdtv
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] [
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.B -h
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.I host
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@ -70,6 +76,26 @@ are:
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.TF "-d\fI oldvacfile"
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.PD
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.TP
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.BI -a " vacfile
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Specifies that vac should create or update a backup archive, inserting
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the files under an extra two levels of directory hierarchy named
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.I yyyy/mmdd
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(year, month, day)
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in the style of the dump file system
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(see Plan 9's \fIfs\fR(4)).
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If
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.I vacfile
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already exists, an additional backup day is added to the
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existing hierarchy, behaving as though the
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.B -d
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flag was specified giving the most recent backup tree in the archive.
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Typically, this option
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is used as part of a nightly backup script.
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This option cannot be used with
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.B -d
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or
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.BR -f .
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.TP
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.BI -b " blocksize
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Specifies the block size that data will be broken into.
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The units for the size can be specified by appending
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@ -90,6 +116,12 @@ file tree whose score is stored in
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Do not include the file or directory specified by
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.IR exclude .
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This option may be repeated multiple times.
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.I Exclude
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can be a shell pattern as accepted by
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.IR rc (1),
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with one extension:
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.B \&...
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matches any sequence of characters including slashes.
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.TP
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.BI -f " vacfile
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The results of
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@ -137,6 +169,27 @@ Print out various statistics on standard error.
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.B -v
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Produce more verbose output on standard error, including the name of the files added to the archive
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and the vac archives that are expanded and merged.
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.TP
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.BI -x " excfile
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Read exclude patterns from the file
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.IR excfile .
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Blank lines and lines beginning with
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.B #
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are ignored.
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All other lines should be of the form
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.B include
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.I pattern
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or
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.B exclude
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.I pattern .
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When considering whether to include a directory or file
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in the vac archive,
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the earliest matching pattern in the file
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applies.
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The patterns are the same syntax accepted by the
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.B -e
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option.
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This option may be repeated multiple times.
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.PP
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.I Unvac
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lists or extracts files stored in the vac archive
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@ -156,9 +209,12 @@ to the time listed in the archive.
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.B -c
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Write extracted files to standard output instead of creating a file.
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.TP
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.B -h
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as per
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.IR vac .
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.B -d
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Reduce the number of blocks read from Venti by
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comparing the files to be stored with their counterparts
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in the file system.
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This option cannot be used with
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.BR -c .
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.TP
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.B -t
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Print a list of the files to standard output rather than extracting them.
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@ -167,6 +223,10 @@ Print a list of the files to standard output rather than extracting them.
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If extracting files, print the name of each file and directory
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to standard error.
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If listing files, print metadata in addition to the names.
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.TP
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.B -h
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as per
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.IR vac .
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.SH SOURCE
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.B /sys/src/cmd/vac
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.SH "SEE ALSO"
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@ -8,7 +8,7 @@
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void
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usage(void)
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{
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fprint(2, "vac [-imqsv] [-a archive.vac] [-b bsize] [-d old.vac] [-f new.vac] [-e exclude]... [-h host] file...\n");
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fprint(2, "vac [-imqsv] [-a archive.vac] [-b bsize] [-d old.vac] [-e exclude] [-f new.vac] [-i name] [-h host] [-x excludefile] file...\n");
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threadexitsall("usage");
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}
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