1GETHOSTNAME(3P)            POSIX Programmer's Manual           GETHOSTNAME(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

13       gethostname — get name of current host
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SYNOPSIS

16       #include <unistd.h>
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18       int gethostname(char *name, size_t namelen);
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DESCRIPTION

21       The gethostname() function shall return the standard host name for  the
22       current  machine.   The  namelen argument shall specify the size of the
23       array pointed to by the name argument. The returned name shall be null-
24       terminated,  except  that  if namelen is an insufficient length to hold
25       the host name, then the returned name shall  be  truncated  and  it  is
26       unspecified whether the returned name is null-terminated.
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28       Host names are limited to {HOST_NAME_MAX} bytes.
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RETURN VALUE

31       Upon successful completion, 0 shall be returned; otherwise, −1 shall be
32       returned.
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ERRORS

35       No errors are defined.
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37       The following sections are informative.
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EXAMPLES

40       None.
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APPLICATION USAGE

43       None.
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RATIONALE

46       None.
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FUTURE DIRECTIONS

49       None.
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SEE ALSO

52       gethostid(), uname()
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54       The Base Definitions volume of POSIX.1‐2008, <unistd.h>
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57       Portions of this text are reprinted and reproduced in  electronic  form
58       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
59       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
60       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
61       cal and Electronics Engineers,  Inc  and  The  Open  Group.   (This  is
62       POSIX.1-2008  with  the  2013  Technical Corrigendum 1 applied.) In the
63       event of any discrepancy between this version and the original IEEE and
64       The  Open Group Standard, the original IEEE and The Open Group Standard
65       is the referee document. The original Standard can be  obtained  online
66       at http://www.unix.org/online.html .
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68       Any  typographical  or  formatting  errors that appear in this page are
69       most likely to have been introduced during the conversion of the source
70       files  to  man page format. To report such errors, see https://www.ker‐
71       nel.org/doc/man-pages/reporting_bugs.html .
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75IEEE/The Open Group                  2013                      GETHOSTNAME(3P)
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