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INTRO(3)		   Linux Programmers Manual		     INTRO(3)

       intro - Introduction to library functions

       Section	3  of the manual describes all library functions excluding the
       library functions (system call wrappers) described in section 2,  which
       implement system calls.

       Many of the functions described in the section are part of the Standard
       C Library (libc).  Some functions are part of  other  libraries	(e.g.,
       the  math library, libm, or the real-time library, librt) in which case
       the manual page will indicate the linker option needed to link  against
       the  required library (e.g., -lm and -lrt, respectively, for the afore
       mentioned libraries).

       In some cases, the programmer must define a feature test macro in order
       to  obtain the declaration of a function from the header file specified
       in the man page SYNOPSIS section.  In such cases, the required macro is
       described  in  the  man	page.  For further information on feature test
       macros, see feature_test_macros(7).

       Certain terms and abbreviations are used to indicate Unix variants  and
       standards to which calls in this section conform.  See standards(7).

   Authors and Copyright Terms
       Look  at  the  header  of  the manual page source for the author(s) and
       copyright conditions.  Note that these can be different	from  page  to

       intro(2), errno(3), feature_test_macros(7), standards(7)

       This  page  is  part of release 3.05 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux				  2007-10-23			      INTRO(3)

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