STRTOK(3)STRTOK(3)NAME
strtok, strsep - string token operations
SYNOPSIS
#include <string.h>
char *
strtok(char *str, const char *sep);
DESCRIPTION
This interface is obsoleted by strsep(3).
Strtok is used to isolate sequential tokens in a null-terminated
string, str. These tokens are separated in the string by one or more
of the characters in sep. The first time that strtok is called, str
should be specified; subsequent calls, wishing to obtain further tokens
from the same string, should pass a null pointer instead. The separa‐
tor string, sep, must be supplied each time, and may change between
calls.
Strtok returns a pointer to the start of each subsequent token in the
string, after replacing the token itself with a NUL character. When no
more tokens remain, a null pointer is returned.
SEE ALSOindex(3), memchr(3), rindex(3), strchr(3), strcspn(3), strpbrk(3), str‐
rchr(3), strsep(3), strspn(3), strstr(3)STANDARDS
Strtok conforms to ANSI X3.159-1989 (``ANSI C'').
BUGS
There is no way to get tokens from multiple strings simultaneously.
The System V strtok will, if handed a string containing only delimiter
characters, 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 June 23, 1990 STRTOK(3)
