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

12       gethostname — get name of current host
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SYNOPSIS

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

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

30       Upon successful completion, 0 shall be returned; otherwise, -1 shall be
31       returned.
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ERRORS

34       No errors are defined.
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36       The following sections are informative.
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EXAMPLES

39       None.
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APPLICATION USAGE

42       None.
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RATIONALE

45       None.
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FUTURE DIRECTIONS

48       None.
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SEE ALSO

51       gethostid(), uname()
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53       The Base Definitions volume of POSIX.1‐2017, <unistd.h>
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56       Portions of this text are reprinted and reproduced in  electronic  form
57       from  IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
58       table Operating System Interface (POSIX), The Open Group Base  Specifi‐
59       cations  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of
60       Electrical and Electronics Engineers, Inc and The Open Group.   In  the
61       event of any discrepancy between this version and the original IEEE and
62       The Open Group Standard, the original IEEE and The Open Group  Standard
63       is  the  referee document. The original Standard can be obtained online
64       at http://www.opengroup.org/unix/online.html .
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66       Any typographical or formatting errors that appear  in  this  page  are
67       most likely to have been introduced during the conversion of the source
68       files to man page format. To report such errors,  see  https://www.ker‐
69       nel.org/doc/man-pages/reporting_bugs.html .
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73IEEE/The Open Group                  2017                      GETHOSTNAME(3P)
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