ERRNO ¶The following functions allow you to update the ERRNO
variable:
void update_ERRNO_int(int errno_val);Set ERRNO to the string equivalent of the error code
in errno_val. The value should be one of the defined
error codes in <errno.h>, and gawk turns it
into a (possibly translated) string using the C strerror() function.
void update_ERRNO_string(const char *string);Set ERRNO directly to the string value of ERRNO.
gawk makes a copy of the value of string.
void unset_ERRNO(void);Unset ERRNO.