gethostname(3p) — Linux manual page

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

PROLOG

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

NAME

       gethostname — get name of current host

SYNOPSIS

       #include <unistd.h>

       int gethostname(char *name, size_t namelen);

DESCRIPTION

       The gethostname() function shall return the standard host name
       for the current machine.  The namelen argument shall specify the
       size of the array pointed to by the name argument. The returned
       name shall be null-terminated, except that if namelen is an
       insufficient length to hold the host name, then the returned name
       shall be truncated and it is unspecified whether the returned
       name is null-terminated.

       Host names are limited to {HOST_NAME_MAX} bytes.

RETURN VALUE

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

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       gethostid(3p), uname(3p)

       The Base Definitions volume of POSIX.1‐2017, unistd.h(0p)

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any
       discrepancy between this version and the original IEEE and The
       Open Group Standard, the original IEEE and The Open Group
       Standard is the referee document. The original Standard can be
       obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page
       are most likely to have been introduced during the conversion of
       the source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group               2017                   GETHOSTNAME(3P)

Pages that refer to this page: unistd.h(0p)

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