/share/man/man3/intro.3
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- .\" @(#)intro.3 8.1 (Berkeley) 6/5/93
- .\" $FreeBSD$
- .\"
- .Dd June 5, 1993
- .Dt INTRO 3
- .Os
- .Sh NAME
- .Nm intro
- .Nd introduction to the C libraries
- .Sh DESCRIPTION
- This section provides an overview of the C
- library functions, their error returns and other
- common definitions and concepts.
- Most of these functions are available from the C library,
- .Em libc .
- .\" (see
- .\" .Xr libc 3 ) .
- Other libraries, such as the math library,
- .Em libm ,
- must be indicated at compile time with the
- .Fl l
- option of the compiler.
- .\" .Pp
- .\" A subset of the
- .\" .Xr libc functions
- .\" are available from Fortran;
- .\" they are described separately in
- .\" .Xr intro 3f .
- .Pp
- The various libraries (followed by the loader flag):
- .Bl -tag -width "libc (-lc)"
- .It Xr libc Pq Fl l Ns Ar c
- Standard C library functions.
- .\" (See
- .\" .Xr libc 3 . )
- When using the C compiler
- .Xr cc 1 ,
- it is not necessary
- to supply the loader flag
- .Fl l Ns Ar c
- for these functions.
- There are several `libraries' or groups of functions included inside of
- .Xr libc :
- the standard
- .Tn I/O
- routines,
- database routines,
- bit operators,
- string operators,
- character tests and character operators,
- des encryption routines,
- storage allocation, time functions, signal handling and more.
- .It Xr libcurses Pq Fl l Ns Ar curses Fl l Ns Ar termcap
- Terminal independent screen management routines
- for two dimensional non-bitmap display terminals.
- (See
- .Xr ncurses 3 . )
- .It Xr libcompat Pq Fl l Ns Ar compat
- Functions which are obsolete but are available for compatibility with
- .Bx 4.3 .
- In particular,
- a number of system call interfaces provided in previous releases of
- .Bx
- have been included for source code compatibility.
- Use of these routines should, for the most part, be avoided.
- The manual page entry for each compatibility routine
- indicates the proper interface to use.
- .It Xr libkvm Pq Fl l Ns Ar kvm
- Functions used to access kernel memory are in this library.
- They can be used
- against both a running system and a crash dump.
- (See
- .Xr kvm 3 . )
- .It Xr libl Pq Fl l Ns Ar l
- The library for
- .Xr lex 1 .
- .\" .It Xr libln
- .It Xr libm Pq Fl l Ns Ar m
- The math library,
- .Em libm .
- The math library is loaded as needed by the Pascal compiler,
- .\" .Xr pc 1 ,
- but not by the C compiler which requires the
- .Fl l Ns Ar m
- flag.
- (See
- .Xr math 3 . )
- .It Xr libmp Pq Fl l Ns Ar mp
- .\" .It Xr libom
- .\" Old math library.
- .\" .It Xr libplot Pq Fl l Ns Ar plot
- .\" Device independent plotting functions.
- .\" (See
- .\" .Xr plot 3 . )
- .\" .It Xr libplotf77 Pq Fl l Ns Ar plotf77
- .\" The device independent plotting functions for fortran.
- .\" (See
- .\" .Xr plot 3 . )
- .\" .It Xr libresolv Pq Fl l Ns Ar resolv
- .\" Routines for network address resolution.
- .It Xr libtermcap Pq Fl l Ns Ar termcap
- The terminal independent operation library package.
- (See
- .Xr termcap 3 . )
- .\" .It libvt0.a
- .It Xr liby Pq Fl l Ns Ar y
- The library for
- .Xr yacc 1 .
- .El
- .Sh FILES
- .Bl -tag -width /usr/lib/libm_p.a -compact
- .It Pa /usr/lib/libc.a
- the C library
- .It Pa /usr/lib/libc_p.a
- the C library compiled for profiling
- .It Pa /usr/lib/libm.a
- the math library
- .It Pa /usr/lib/libm_p.a
- the math library compiled for profiling
- .El
- .Sh SEE ALSO
- .\" .Xr libc 3 ,
- .Xr cc 1 ,
- .Xr ld 1 ,
- .Xr nm 1 ,
- .Xr intro 2 ,
- .Xr math 3 ,
- .Xr stdio 3
- .\" .Sh LIST OF FUNCTIONS
- .\" .Bl -column "strncasecmpxxx" "system"
- .\" .Sy Name Description
- .\" .El
- .Sh HISTORY
- An
- .Nm
- manual appeared in
- .At v7 .