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.
catgets — read a program message
char *catgets(nl_catd catd, int set_id, int msg_id, const char *s);
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.
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.
The catgets() function shall fail if:
- The read operation was terminated due to the receipt of a signal, and no
data was transferred.
- The message identified by set_id and msg_id is not in the
The catgets() function may fail if:
- The catd argument is not a valid message catalog descriptor open
- The message identified by set_id and msg_id in the specified
message catalog did not satisfy implementation-defined security
- The message catalog identified by catd is corrupted.
The following sections are informative.
The Base Definitions volume of POSIX.1‐2008,
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 .
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