1PMPRINTF(3)                Library Functions Manual                PMPRINTF(3)
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NAME

6       pmprintf,  pmflush  - print formatted output in a window or to standard
7       error
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C SYNOPSIS

10       #include <pcp/pmapi.h>
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12       int pmprintf(const char *fmt, ... /*args*/);
13       int pmflush(void);
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15       cc ... -lpcp
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DESCRIPTION

18       The combination of pmprintf and pmflush produces output  in  either  an
19       xconfirm(1)  window,  on  the  standard error stream, or to a file in a
20       manner similar to fprintf(3).  The fmt argument is used to control  the
21       conversion,  formatting, and printing of the variable length args list.
22       The output technique is controlled via an environment variable.
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24       pmprintf appends the formatted message string  to  an  internal  buffer
25       shared by the two routines, without actually producing any output.
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27       pmflush  causes the internal buffer to be either displayed in a window,
28       printed on standard error, or flushed to a file and the internal buffer
29       to be cleared.
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ENVIRONMENT

32       The  environment variable PCP_STDERR controls the output technique used
33       by pmflush:
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35           If PCP_STDERR is unset, the text is written onto the stderr  stream
36           of the caller.
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38           If  PCP_STDERR is set to the literal reserved word DISPLAY then the
39           text will be displayed as a GUI dialog using xconfirm(1).
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41           If PCP_STDERR is set to any other value then pmflush interprets the
42           value  as  a file name and appends the text to that file.  The file
43           is created if it doesn't already exist, and in  this  case  if  the
44           file creation fails, then stderr is used instead).
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FILES

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

51       On successful completion, pmprintf returns  the  number  of  characters
52       transmitted,  while  pmflush returns a value of zero on successful com‐
53       pletion.
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55       For either routine, a negative  value  is  returned  if  an  error  was
56       encountered,  and this can be passed to pmErrStr(3) to obtain the asso‐
57       ciated error message.
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SEE ALSO

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