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STRTOK(3)                   BSD Programmer's Manual                  STRTOK(3)

     strtok - string tokens

     #include <&lt;string.h>&gt;

     char *
     strtok(char *str, const char *sep);

     This interface is obsoleted by strsep(3).

     The strtok() function is used to isolate sequential tokens in a null-
     terminated string, str. These tokens are separated in the string by at
     least one of the characters in sep. The first time that strtok() is
     called, str should be specified; subsequent calls, wishing to obtain fur-
     ther tokens from the same string, should pass a null pointer instead.
     The separator string, sep, must be supplied each time, and may change be-
     tween calls.

     The strtok() function returns a pointer to the beginning of each subse-
     quent token in the string, after replacing the token itself with a NUL
     character.  When no more tokens remain, a null pointer is returned.

     index(3),  memchr(3),  rindex(3),  strchr(3),  strcspn(3),  strpbrk(3),
     strrchr(3),  strsep(3),  strspn(3),  strstr(3)

     The strtok() function conforms to ANSI C X3.159-1989 (``ANSI C '').

     There is no way to get tokens from multiple strings simultaneously.

     The System V strtok(), if handed a string containing only delimiter char-
     acters, will not alter the next starting point, so that a call to
     strtok() with a different (or empty) delimiter string may return a non-
     NULL value.  Since this implementation always alters the next starting
     point, such a sequence of calls would always return NULL.

3rd Berkeley Distribution      February 3, 1994                              1