Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

pmflush(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).



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.


Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.


Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner