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pmprintf(3)

NAME

   pmprintf,  pmflush  - print formatted output in a window or to standard
   error

C SYNOPSIS

   #include <pcp/pmapi.h>

   int pmprintf(const char *fmt, ... /*args*/);
   int pmflush(void);

   cc ... -lpcp

DESCRIPTION

   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 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.

ENVIRONMENT

   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).

FILES

   pmprintf uses the mkstemp(3) function to create a temporary file.  This
   temporary file is deleted when pmflush is called.

DIAGNOSTICS

   On successful completion, pmprintf returns  the  number  of  characters
   transmitted,  while  pmflush  returns  a  value  of  zero on successful
   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.

SEE ALSO

   pmdbg(1), fprintf(3), mkstemp(3), pmErrStr(3) and PMAPI(3).



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