gen/intro.3

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  32 .\"     @(#)intro.3     8.1 (Berkeley) 6/5/93
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  35 .Dd Aug 17, 2006
  36 .Dt INTRO 3
  37 .Os
  38 .Sh NAME
  39 .Nm intro
  40 .Nd introduction to the C libraries
  41 .Sh DESCRIPTION
  42 This section provides an overview of the C
  43 library functions, their error returns and other
  44 common definitions and concepts.
  45 Most of these functions are available from the System library,
  46 .Em libSystem .
  47 Other libraries
  48 must be indicated at compile time with the
  49 .Fl l
  50 option of the compiler.
  51 .Pp
  52 The various libraries (followed by the loader flag):
  53 .Bl -tag -width "libSystem (-lSystem)"
  54 .It Xr libSystem Pq Fl l Ns Ar System
  55 Standard C library functions.
  56 When using the C compiler
  57 .Xr cc 1 ,
  58 it is not necessary
  59 to supply the loader flag
  60 .Fl l Ns Ar System
  61 for these functions.
  62 There are several `libraries' or groups of functions included inside of
  63 .Xr libSystem :
  64 the standard
  65 .Tn I/O
  66 routines,
  67 database routines,
  68 bit operators,
  69 string operators,
  70 character tests and character operators,
  71 des encryption routines,
  72 storage allocation, time functions, signal handling and more.
  73 .Pp
  74 For compatibility with other systems, which provide these capabilities in
  75 separate libraries (such as
  76 .Xr libc ) ,
  77 symbolic links are provided for
  78 .Fl l Ns Ar c ,
  79 .Fl l Ns Ar dbm ,
  80 .Fl l Ns Ar dl ,
  81 .Fl l Ns Ar info ,
  82 .Fl l Ns Ar m ,
  83 .Fl l Ns Ar poll ,
  84 .Fl l Ns Ar pthread
  85 and
  86 .Fl l Ns Ar rpcsvc ;
  87 they all point to
  88 .Xr libSystem .
  89 .It Xr libcurses Pq Fl l Ns Ar curses Fl l Ns Ar termcap
  90 Terminal independent screen management routines
  91 for two dimensional non-bitmap display terminals.
  92 (See
  93 .Xr ncurses 3 . )
  94 .It Xr libl Pq Fl l Ns Ar l
  95 The library for
  96 .Xr lex 1 .
  97 .It Xr libtermcap Pq Fl l Ns Ar termcap
  98 The terminal independent operation library package.
  99 (See
 100 .Xr termcap 3 . )
 101 .\" .It libvt0.a
 102 .It Xr liby Pq Fl l Ns Ar y
 103 The library for
 104 .Xr yacc 1 .
 105 .El
 106 .Sh FILES
 107 .Bl -tag -width /usr/lib/libSystem_profile.dylib -compact
 108 .It Pa /usr/lib/libSystem.dylib
 109 the main System library
 110 .It Pa /usr/lib/libSystem_debug.dylib
 111 the main System library compiled with debug support
 112 .It Pa /usr/lib/libSystem_profile.dylib
 113 the main System library compiled for profiling
 114 .El
 115 .Sh SEE ALSO
 116 .\" .Xr libc 3 ,
 117 .Xr cc 1 ,
 118 .Xr ld 1 ,
 119 .Xr nm 1 ,
 120 .Xr intro 2 ,
 121 .Xr stdio 3
 122 .\" .Sh LIST OF FUNCTIONS
 123 .\" .Bl -column "strncasecmpxxx" "system"
 124 .\" .Sy Name    Description
 125 .\" .El
 126 .Sh HISTORY
 127 An
 128 .Nm
 129 manual appeared in
 130 .At v7 .