CREAT(3)                   POSIX Programmer's Manual                  CREAT(3)



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

NNAAMMEE
       creat -- create a new file or rewrite an existing one

SSYYNNOOPPSSIISS
       #include <sys/stat.h>
       #include <fcntl.h>

       int creat(const char *_p_a_t_h, mode_t _m_o_d_e);

DDEESSCCRRIIPPTTIIOONN
       The _c_r_e_a_t() function shall behave as if it is implemented as follows:


           int creat(const char *path, mode_t mode)
           {
               return open(path, O_WRONLY|O_CREAT|O_TRUNC, mode);
           }

RREETTUURRNN VVAALLUUEE
       Refer to _o_p_e_n().

EERRRROORRSS
       Refer to _o_p_e_n().

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
   CCrreeaattiinngg aa FFiillee
       The following example creates the file //ttmmpp//ffiillee with read and write
       permissions for the file owner and read permission for group and
       others. The resulting file descriptor is assigned to the _f_d variable.


           #include <fcntl.h>
           ...
           int fd;
           mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
           char *pathname = "/tmp/file";
           ...
           fd = creat(pathname, mode);
           ...

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

RRAATTIIOONNAALLEE
       The _c_r_e_a_t() function is redundant. Its services are also provided by
       the _o_p_e_n() function. It has been included primarily for historical
       purposes since many existing applications depend on it. It is best
       considered a part of the C binding rather than a function that should
       be provided in other languages.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _m_k_n_o_d(), _o_p_e_n()

       The Base Definitions volume of POSIX.1-2017, <<ffccnnttll..hh>>, <<ssyyss__ssttaatt..hh>>,
       <<ssyyss__ttyyppeess..hh>>

CCOOPPYYRRIIGGHHTT
       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                             CREAT(3)
