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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | DIAGNOSTICS | DEBUGGING OPTIONS | SEE ALSO | COLOPHON |
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PMLOGMV(1) General Commands Manual PMLOGMV(1)
pmlogmv, pmlogcp - move (rename) or copy Performance Co-Pilot
archive files
pmlogmv [-cfNV?] [-D debug] srcname dstname
pmlogcp [-cfNV?] [-D debug] srcname dstname
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. Similarly pmlogcp copies all the files of single PCP
archive in a single operation.
The srcname 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 dstname, except when dstname is an
existing directory, in which case the files are moved or copied
into dstname using the same archive basename as srcname.
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 or pmlogcp, all the files associated with srcname will
be preserved, and no new files with the dstname 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 srcname and
the dstname 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 srcname to dstname.
pmlogcp always uses cp(1).
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 and pmlogcp take a conservative view in
respect of dstname and will not proceed if dstname 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 the rename or copy to proceed, even if
dstname 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.
The -D or --debug option enables the output of additional
diagnostics on stderr to help triage problems, although the
information is sometimes cryptic and primarily intended to provide
guidance for developers rather end-users. debug is a comma
separated list of debugging options; use pmdbg(1) with the -l
option to obtain a list of the available debugging options and
their meaning.
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 [email protected]. This page was obtained from the
project's upstream Git repository
⟨https://github.com/performancecopilot/pcp.git⟩ on 2025-08-11.
(At that time, the date of the most recent commit that was found
in the repository was 2025-08-11.) 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
[email protected]
Performance Co-Pilot PCP PMLOGMV(1)
Pages that refer to this page: pmgetopt(1), pmlogger_daily(1)
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HTML rendering created 2025-09-06 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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