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 2004-06-17 "Linux 2.6.7" "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 .SH DESCRIPTION
  38 These functions are used to access or to change the domain name of the
  39 current processor.
  40 If the null-terminated domain name requires more than \fIlen\fP bytes,
  41 .BR getdomainname ()
  42 returns the first \fIlen\fP bytes (glibc) or returns an error (libc).
  43 .SH "RETURN VALUE"
  44 On success, zero is returned.
  45 On error, \-1 is returned, and
  46 .I errno
  47 is set appropriately.
  48 .SH ERRORS
  49 .TP
  50 .B EFAULT
  51 For
  52 .BR setdomainname ():
  53 .I name
  54 pointed outside of user address space.
  55 .TP
  56 .B EINVAL
  57 For
  58 .BR getdomainname ()
  59 under libc:
  60 .I name
  61 is NULL or
  62 .I name
  63 is longer than
  64 .I len
  65 bytes.
  66 .TP
  67 .B EINVAL
  68 For
  69 .BR setdomainname ():
  70 .I len
  71 was negative or too large.
  72 .TP
  73 .B EPERM
  74 For
  75 .BR setdomainname ():
  76 the caller is unprivileged (Linux: does not have the
  77 .B CAP_SYS_ADMIN
  78 capability).
  79 .SH "CONFORMING TO"
  80 POSIX does not specify these calls.
  81 .\" But they appear on most systems...
  82 .SH "SEE ALSO"
  83 .BR gethostname (2),
  84 .BR sethostname (2),
  85 .BR uname (2)