man3/getrpcent.3

   1 .\" This page was taken from the 4.4BSD-Lite CDROM (BSD license)
   2 .\"
   3 .\" %%%LICENSE_START(BSD_ONELINE_CDROM)
   4 .\" This page was taken from the 4.4BSD-Lite CDROM (BSD license)
   5 .\" %%%LICENSE_END
   6 .\"
   7 .\" @(#)getrpcent.3n    2.2 88/08/02 4.0 RPCSRC; from 1.11 88/03/14 SMI
   8 .TH GETRPCENT 3 2020-04-11 "" "Linux Programmer's Manual"
   9 .SH NAME
  10 getrpcent, getrpcbyname, getrpcbynumber, setrpcent, endrpcent \- get
  11 RPC entry
  12 .SH SYNOPSIS
  13 .nf
  14 .B #include <netdb.h>
  15 .PP
  16 .BI "struct rpcent *getrpcent(void);"
  17 .PP
  18 .BI "struct rpcent *getrpcbyname(const char *" name );
  19 .PP
  20 .BI "struct rpcent *getrpcbynumber(int " number );
  21 .PP
  22 .BI "void setrpcent(int " stayopen );
  23 .PP
  24 .BI "void endrpcent(void);"
  25 .fi
  26 .SH DESCRIPTION
  27 .PP
  28 The
  29 .BR getrpcent (),
  30 .BR getrpcbyname (),
  31 and
  32 .BR getrpcbynumber ()
  33 functions each return a pointer to an object with the
  34 following structure containing the broken-out
  35 fields of an entry in the RPC program number data base.
  36 .PP
  37 .in +4n
  38 .EX
  39 struct rpcent {
  40     char  *r_name;     /* name of server for this RPC program */
  41     char **r_aliases;  /* alias list */
  42     long   r_number;   /* RPC program number */
  43 };
  44 .EE
  45 .in
  46 .PP
  47 The members of this structure are:
  48 .TP
  49 .I r_name
  50 The name of the server for this RPC program.
  51 .TP
  52 .I r_aliases
  53 A NULL-terminated list of alternate names for the RPC program.
  54 .TP
  55 .I r_number
  56 The RPC program number for this service.
  57 .PP
  58 The
  59 .BR getrpcent ()
  60 function reads the next entry from the database.
  61 A connection is opened to the database if necessary.
  62 .PP
  63 The
  64 .BR setrpcent ()
  65 function opens a connection to the database,
  66 and sets the next entry to the first entry.
  67 If
  68 .I stayopen
  69 is nonzero,
  70 then the connection to the database
  71 will not be closed between calls to one of the
  72 .BR getrpc* ()
  73 functions.
  74 .PP
  75 The
  76 .BR endrpcent ()
  77 function closes the connection to the database.
  78 .PP
  79 The
  80 .BR getrpcbyname ()
  81 and
  82 .BR getrpcbynumber ()
  83 functions sequentially search from the beginning
  84 of the file until a matching RPC program name or
  85 program number is found, or until end-of-file is encountered.
  86 .SH RETURN VALUE
  87 On success,
  88 .BR getrpcent (),
  89 .BR getrpcbyname (),
  90 and
  91 .BR getrpcbynumber ()
  92 return a pointer to a statically allocated
  93 .I rpcent
  94 structure.
  95 NULL is returned on EOF or error.
  96 .SH FILES
  97 .TP
  98 .I /etc/rpc
  99 RPC program number database.
 100 .SH ATTRIBUTES
 101 For an explanation of the terms used in this section, see
 102 .BR attributes (7).
 103 .TS
 104 allbox;
 105 lbw28 lb lb
 106 l l l.
 107 Interface       Attribute       Value
 108 T{
 109 .BR getrpcent (),
 110 .BR getrpcbyname (),
 111 .br
 112 .BR getrpcbynumber ()
 113 T}      Thread safety   MT-Unsafe
 114 T{
 115 .BR setrpcent (),
 116 .BR endrpcent ()
 117 T}      Thread safety   MT-Safe locale
 118 .TE
 119 .sp 1
 120 .SH CONFORMING TO
 121 Not in POSIX.1.
 122 Present on the BSDs, Solaris, and many other systems.
 123 .SH BUGS
 124 All information
 125 is contained in a static area
 126 so it must be copied if it is
 127 to be saved.
 128 .SH SEE ALSO
 129 .BR getrpcent_r (3),
 130 .BR rpc (5),
 131 .BR rpcinfo (8),
 132 .BR ypserv (8)