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 environment
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.
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 interprets
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 instead).
On successful completion, pmprintf returns the number of characters
transmitted, while pmflush returns a value of zero on successful
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.
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@example.com. This page was obtained from the project's upstream
Git repository ⟨git://git.pcp.io/pcp⟩ on 2017-03-13. 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
Performance Co-Pilot PCP PMPRINTF(3)