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.
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
The catgets() function need not be thread-safe.
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
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
The catgets() function may fail if:
EBADF The catd argument is not a valid message catalog descriptor
open for reading.
The message identified by set_id and msg_id in the specified
message catalog did not satisfy implementation-defined
EINVAL The message catalog identified by catd is corrupted.
The following sections are informative.
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The Open
Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open
Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
applied.) 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.unix.org/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
IEEE/The Open Group 2013 CATGETS(3P)