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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | DIAGNOSTICS | SEE ALSO | COLOPHON |
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PMLOGMV(1) General Commands Manual PMLOGMV(1)
pmlogmv - move (rename) Performance Co-Pilot archive files
pmlogmv [-cfNV?] oldname newname
A Performance Co-Pilot (PCP) archive consists of multiple files
as created by pmlogger(1). pmlogmv allows all the files of a
single PCP archive to be moved or renamed as a group in a single
operation.
The oldname argument identifies the target archive, and may be
either the basename that is common to all files in that archive
or one of the archive's files. The new archive's basename is
newname.
Because PCP archives are important records of system activity,
special care is taken to ensure the integrity of an archive's
files. For recoverable problems encountered during the execution
of pmlogmv, all the files associated with oldname will be
preserved, and no new files with the newname prefix will be
created. ``Recoverable problems'' include signals that can be
caught (such as SIGHUP, SIGINT, SIGQUIT and SIGTERM), permissions
issues, new files already existing, file system full events, etc.
The implementation of pmlogmv tries to use hard links in the file
system and so follows the semantic restrictions of ln(2) which
for most systems means the directories containing both the
oldname and the newname PCP archive files need to be within the
same file system. When this is not possible, pmlogmv falls back
to using cp(1) to copy oldname to newname.
The available command line options are:
-c, --checksum
Paranoid checking mode when cp(1) is needed and each file's
checksum is computed for the original file and the copied
file, and the checksums must match before the copy is
considered acceptable. The checksum command is chosen by
trying the following in turn until one is found to be
executable: md5sum(1), sha256sum(1), sha1sum(1) and sum(1).
If no executable checksum command is found, a warning is
issued and the checksum check is skipped.
-f, --force
Normally pmlogmv takes a conservative view in respect of
newname and will not proceed if newname contains any
characters that are likely to cause a problem for sh(1).
This includes ``glob'' characters like ``?'', ``*'' and
``['', shell syntax meta characters like ``('', ``|'', ``;''
and ``&'', shell I/O redirection characters like ``<'' and
``>'', the dollar sign, a space, etc.
The -f flag forces pmlogmv to proceed, even if newname
contains any of these ``unsafe'' characters.
-N, --showme
Perform a dry-run, checking and reporting what changes would
be made without making any changes.
-V, --verbose
Enable verbose mode.
-?, --help
Display usage message and exit.
All error and warning messages are intended to be easily
understood and errors produce a non-zero exit status.
cp(1), ln(1), md5sum(1), PCPIntro(1), pmlogger(1), sha1sum(1),
sha256sum(1) and LOGARCHIVE(5).
This page is part of the PCP (Performance Co-Pilot) project.
Information about the project can be found at
⟨http://www.pcp.io/⟩. If you have a bug report for this manual
page, send it to pcp@groups.io. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2023-12-22.
(At that time, the date of the most recent commit that was found
in the repository was 2023-12-16.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Performance Co-Pilot PCP PMLOGMV(1)
Pages that refer to this page: pmgetopt(1), pmlogger_daily(1)
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HTML rendering created 2023-12-22 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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