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NAME | C SYNOPSIS | DESCRIPTION | EXAMPLE | SEE ALSO | DIAGNOSTICS | COLOPHON |
PMGETVERSION(3) Library Functions Manual PMGETVERSION(3)
pmGetVersion - fetch installed PCP version number
#include <pcp/pmapi.h>
int pmGetVersion(void);
cc ... -lpcp
pmGetVersion returns a binary encoding of the locally installed PCP
version number.
This may be used in conjunction with the related macros
PM_VERSION(a,b,c) and PM_VERSION_CURRENT that generate PCP version
numbers in the same format. Refer to the example below.
The encoding uses one byte for each of the parts of the version
number of the installed PCP package, namely the major number, the
minor number and the revision number. So PCP version 3.10.5 is
encoded as 0x30a05.
The string format of the installed PCP package version number as also
available from pmGetConfig with the argument PCP_VERSION.
pmGetVersion was introduced in PCP 3.10.5.
The following C fragment demonstrates the use of both the compile-
time macros and the run-time pmGetVersion function for an application
that should not be built for PCP versions older than 3.10.5, but
after that there are two alternative implementations with a newer
(faster, sweeter, smaller) variant of the XYZ service that only
becoming available in PCP 4.0.0.
#include <pcp/pmapi.h>
#ifdef PM_VERSION_CURRENT
#if PM_VERSION_CURRENT < PM_VERSION(3,10,5)
/* no pmGetVersion() before PCP 3.10.5 */
printf("PCP version 0x%x too old\n", PM_VERSION_CURRENT);
#endif
version = pmGetVersion();
if (version >= PM_VERSION(4,0,0) {
/* V2 of the XYZ service introduced in PCP 4.0.0 */
printf("Using V2 of service XYZ\n")
...
}
else {
printf("Using V1 of service XYZ\n")
...
}
#else
{
char *ver = pmGetConfig("PCP_VERSION");
/* only option is to extract version number from returned string */
...
}
#endif
PMAPI(3), and pmGetConfig(3).
None.
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@oss.sgi.com. This page was obtained from the project's upstream
Git repository ⟨git://git.pcp.io/pcp⟩ on 2017-07-05. 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 PMGETVERSION(3)
Pages that refer to this page: pmgetconfig(3)