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NAME | C SYNOPSIS | DESCRIPTION | DIAGNOSTICS | FILES | ENVIRONMENT | SEE ALSO | COLOPHON |
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PMPRINTF(3) Library Functions Manual PMPRINTF(3)
pmprintf, pmflush - print formatted output in a window or to
standard error
#include <pcp/pmapi.h>
int pmprintf(const char *fmt, ... /*args*/);
int pmflush(void);
cc ... -lpcp
The combination of pmprintf and pmflush produces output in either
an xconfirm(1) window, on the standard error stream, or to a file
in a manner similar to fprintf(3). The fmt argument is used to
control the conversion, formatting, and printing of the variable
length args list. The output technique is controlled via an envi‐
ronment variable.
pmprintf appends the formatted message string to an internal
buffer shared by the two routines, without actually producing any
output.
pmflush causes the internal buffer to be either displayed in a
window, printed on standard error, or flushed to a file and the
internal buffer to be cleared.
On successful completion, pmprintf returns the number of charac‐
ters transmitted, while pmflush returns a value of zero on suc‐
cessful completion.
For either routine, a negative value is returned if an error was
encountered, and this can be passed to pmErrStr(3) to obtain the
associated error message.
pmprintf uses the mkstemp(3) function to create a temporary file.
This temporary file is deleted when pmflush is called.
The environment variable PCP_STDERR controls the output technique
used by pmflush:
If PCP_STDERR is unset, the text is written onto the stderr
stream of the caller.
If PCP_STDERR is set to the literal reserved word DISPLAY then
the text will be displayed as a GUI dialog using xconfirm(1).
If PCP_STDERR is set to any other value then pmflush inter‐
prets the value as a file name and appends the text to that
file. The file is created if it doesn't already exist, and in
this case if the file creation fails, then stderr is used in‐
stead).
pmdbg(1), fprintf(3), mkstemp(3), pmErrStr(3) and PMAPI(3).
This page is part of the PCP (Performance Co-Pilot) project. In‐
formation 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
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 man-pages@man7.org
Performance Co-Pilot PCP PMPRINTF(3)
Pages that refer to this page: pmgetoptions(3), pmloadderivedconfig(3), pmregisterderived(3), pmsprintf(3), QMC(3), QmcContext(3), QmcDesc(3), QmcGroup(3), QmcIndom(3), QmcMetric(3), QmcSource(3)
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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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