pmsprintf(3) — Linux manual page


PMSPRINTF(3)              Library Functions Manual              PMSPRINTF(3)

NAME         top

       pmsprintf - formatted string conversion

C SYNOPSIS         top

       #include <pcp/pmapi.h>

       int pmsprintf(char *str, size_t size, const char *fmt, ... /*args*/);

       cc ... -lpcp

DESCRIPTION         top

       Safe string formatting interface that wraps the vsnprintf(3) call.

       It differs primarily in that pmsprintf guarantees that the output
       buffer str will be null-terminated even when the provided buffer size
       is insufficient to contain the formatted string.  In this case a
       null-terminated truncated string will be returned in str.

       In the case of a failure in the underlying vsnprintf interface, a
       null-terminated empty string will be returned in str, and the return
       value will be zero.

DIAGNOSTICS         top

       On successful completion, pmsprintf returns the number of characters
       written to the supplied buffer, not including the null terminator.

       The return code is always zero or more, never negative.

SEE ALSO         top

       vsnprintf(3), pmprintf(3) and PMAPI(3).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2020-07-14.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-07-14.)  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

Performance Co-Pilot                 PCP                        PMSPRINTF(3)