strtok_r - split string into tokens (thread-safe)

Syntax	#include <string.h> char *strtok_r(char *s, const char *sep, char **lasts);
Description	The function strtok_r() is the thread-safe version of strtok(). The function strtok_r() can be used to split a complete string s terminated by a null into 0 or more substrings called "tokens". Tokens may be delimited by one or more separators that are specified in the sep string. The lasts argument points to a pointer provided by the user that strtok_r() uses to obtain the information necessary to continue processing this string. The first time strtok_r() is called, s points to a string terminated with a null byte, and sep points to a string terminated with a null byte with delimiters. The value pointed to by lasts is ignored. The function strtok_r() returns a pointer to the beginning of the first token found, overwrites the first delimiter found with the NULL character (\0) and updates the pointer pointed to by lasts. To get additional tokens, a null pointer is specified for s and the value from the last call is specified for lasts in the subsequent call. This can be continued until there are no more tokens. In this case a null pointer is returned. A different delimiter string sep may be specified in each call. The function strtok_r() returns a pointer to the token. If no token was found, a null pointer is returned.
Return val.	Pointer to the token found
		if successful.
	Null pointer	if no token is found.
See also	strtok(), string().