This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       None.

       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                                       CATGETS(3POSIX)

       The  catgets()  function  shall  attempt  to read message msg_id, in set set_id, from the message catalog
       identified by catd.  The catd argument is a message catalog descriptor returned from an earlier  call  to
       catopen().   The results are undefined if catd is not a value returned by catopen() for a message catalog
       still open in the process. The s argument points to a default message string which shall be  returned  by
       catgets() if it cannot retrieve the identified message.

       The catgets() function need not be thread-safe.

       The catgets() function shall fail if:

       EINTR  The read operation was terminated due to the receipt of a signal, and no data was transferred.

       ENOMSG The message identified by set_id and msg_id is not in the message catalog.

       The catgets() function may fail if:

       EBADF  The catd argument is not a valid message catalog descriptor open for reading.

       EBADMSG
              The  message  identified  by  set_id  and  msg_id in the specified message catalog did not satisfy
              implementation-defined security criteria.

       EINVAL The message catalog identified by catd is corrupted.

       Thefollowingsectionsareinformative.

       None.

       None.

       catgets — read a program message

       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.

       None.

       If  the  identified  message  is  retrieved successfully, catgets() shall return a pointer to an internal
       buffer area containing the null-terminated message string. If the call is unsuccessful for any reason,  s
       shall be returned and errno shall be set to indicate the error.

catclose(), catopen()

       The Base Definitions volume of POSIX.1‐2017, <nl_types.h>

       #include <nl_types.h>

       char *catgets(nl_catd catd, int set_id, int msg_id, const char *s);