HISTORY(1) HISTORY(1)
NAME
history - print file names from the dump
SYNOPSIS
history [ -Dabcemnw ] [ -fuv ] [ -d dumpfilesystem ] [ -s
yyyymmdd ] files ...
DESCRIPTION
History prints the names, dates, and sizes, and modifier of
all versions of the named files, looking backwards in time,
stored in the dump file system. If the file exists in the
main tree, the first line of output will be its current
state. For example,
history /adm/users
produces
May 14 15:29:18 EDT 2001 /adm/users 10083 [adm]
May 14 15:29:18 EDT 2001 /n/dump/2001/0515/adm/users 10083 [adm]
May 11 17:26:24 EDT 2001 /n/dump/2001/0514/adm/users 10481 [adm]
May 10 16:40:51 EDT 2001 /n/dump/2001/0511/adm/users 10476 [adm]
...
When presented with a path of the form /n/fs/path, history
will use fsdump as the name of the dump file system, and
will print a history of path.
The -v option enables verbose debugging printout.
The -D option causes diff(1) to be run for each adjacent
pair of dump files. The options -abcemnw are passed through
to diff; the little-used diff option -f is replaced by the
functionality described below, and the -r option is disal-
lowed.
The -u option causes times to be printed in GMT (UT) rather
than local time.
The -d option selects some other dump file system such as
/n/bootesdump.
The -f option forces the search to continue even when the
file in question does not exist (useful for files that only
exist intermittently).
Finally, the -s option sets the starting (most recent) date
for the output.
EXAMPLES
Page 1 Plan 9 (printed 12/22/24)
HISTORY(1) HISTORY(1)
Check how often a user has been logged in.
history /usr/ches/tmp
FILES
/n/dump
SOURCE
/sys/src/cmd/history.c
SEE ALSO
fs(4)
yesterday(1)
Page 2 Plan 9 (printed 12/22/24)