NAME¶
intro - introduction to library functions
DESCRIPTION¶
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
aforementioned 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. (Where required, these feature test macros must be
defined before including
any header files.) 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).
NOTES¶
Authors and Copyright Conditions¶
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 page!
SEE ALSO¶
intro(2),
errno(3),
capabilities(7),
credentials(7),
environ(7),
feature_test_macros(7),
libc(7),
math_error(7),
path_resolution(7),
pthreads(7),
signal(7),
standards(7)
COLOPHON¶
This page is part of release 3.44 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/.
