8    Language-Specific Services for the C Programming Language

8.2    C Language Input/Output Functions

8.2.7    Stdio with Explicit Client Locking

8.2.7.4    Errors

The getc_unlocked() and getchar_unlocked() functions do detect the implementation-defined [EBADF] condition (not open for read). The putc_unlocked() and putchar_unlocked() functions do detect the implementation-defined [EBADF] condition (not open for write).

8.3    Other C Language Functions

8.3.4    Find String Token

8.3.4.4    Errors

The strtok_r() function does not detect any implementation-defined error conditions.

8.3.5    ASCII Time Representation

8.3.5.4    Errors

The asctime_r() function does detect the implementation-defined [EINVAL] condition.

8.3.6    Current Time Representation

8.3.6.4    Errors

The ctime_r() function does detect the implementation-defined [EINVAL] condition.

8.3.7    Coordinated Universal Time

8.3.7.4    Errors

The gmtime_r() function does detect the implementation-defined [EINVAL] condition.

8.3.8    Local Time

8.3.8.4    Errors

The localtime_r() function does detect the implementation-defined [EINVAL] condition.