catgets - read a program message
[XSI] #include <nl_types.h>
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 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 reentrant. A function that is not required to be reentrant is not required to 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 may be set to indicate the error.
The catgets() function may fail if:
- 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 security criteria.
- The read operation was terminated due to the receipt of a signal, and no data was transferred.
- The message catalog identified by catd is corrupted.
- The message identified by set_id and msg_id is not in the message catalog.
catclose() , catopen() , the Base Definitions volume of IEEE Std 1003.1-2001, <nl_types.h>
First released in Issue 2.
A note indicating that this function need not be reentrant is added to the DESCRIPTION.
In the DESCRIPTION, the note about reentrancy is expanded to cover thread-safety.