man2/getdomainname.2

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   3 .\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
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  25 .\" Modified 1997-08-25 by Nicolás Lichtmaier <nick@debian.org>
  26 .\" Modified 2004-06-17 by Michael Kerrisk <mtk-manpages@gmx.net>
  27 .\"
  28 .TH GETDOMAINNAME 2 2007-07-26 "Linux" "Linux Programmer's Manual"
  29 .SH NAME
  30 getdomainname, setdomainname \- get/set domain name
  31 .SH SYNOPSIS
  32 .B #include <unistd.h>
  33 .sp
  34 .BI "int getdomainname(char *" name ", size_t " len );
  35 .br
  36 .BI "int setdomainname(const char *" name ", size_t " len );
  37 .sp
  38 .in -4n
  39 Feature Test Macro Requirements for glibc (see
  40 .BR feature_test_macros (7)):
  41 .in
  42 .sp
  43 .ad l
  44 .BR getdomainame (),
  45 .BR setdomainame ():
  46 _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE\ <\ 500)
  47 .ad b
  48 .SH DESCRIPTION
  49 These functions are used to access or to change the domain name of the
  50 current processor.
  51 If the null-terminated domain name requires more than \fIlen\fP bytes,
  52 .BR getdomainname ()
  53 returns the first \fIlen\fP bytes (glibc) or returns an error (libc).
  54 .SH "RETURN VALUE"
  55 On success, zero is returned.
  56 On error, \-1 is returned, and
  57 .I errno
  58 is set appropriately.
  59 .SH ERRORS
  60 .TP
  61 .B EFAULT
  62 For
  63 .BR setdomainname ():
  64 .I name
  65 pointed outside of user address space.
  66 .TP
  67 .B EINVAL
  68 For
  69 .BR getdomainname ()
  70 under libc:
  71 .I name
  72 is NULL or
  73 .I name
  74 is longer than
  75 .I len
  76 bytes.
  77 .TP
  78 .B EINVAL
  79 For
  80 .BR setdomainname ():
  81 .I len
  82 was negative or too large.
  83 .TP
  84 .B EPERM
  85 For
  86 .BR setdomainname ():
  87 the caller is unprivileged (Linux: does not have the
  88 .B CAP_SYS_ADMIN
  89 capability).
  90 .SH "CONFORMING TO"
  91 POSIX does not specify these calls.
  92 .\" But they appear on most systems...
  93 .SH "SEE ALSO"
  94 .BR gethostname (2),
  95 .BR sethostname (2),
  96 .BR uname (2)