Provided by: manpages-pt-dev_20040726-4_all
strtok, strtok_r - extract tokens from strings
#include <string.h> char *strtok(char *s, const char *delim); char *strtok_r(char *s, const char *delim, char **ptrptr);
A `token' is a nonempty string of characters not occurring in the string delim, followed by \0 or by a character occurring in delim. The strtok() function can be used to parse the string s into tokens. The first call to strtok() should have s as its first argument. Subsequent calls should have the first argument set to NULL. Each call returns a pointer to the next token, or NULL when no more tokens are found. If a token ends with a delimiter, this delimiting character is overwritten with a \0 and a pointer to the next character is saved for the next call to strtok(). The delimiter string delim may be different for each call. The strtok_r() function works the same as the strtok() function, but instead of using a static buffer it uses a pointer to a user allocated char* pointer. This pointer, the ptrptr parameter, must be the same while parsing the same string.
Never use these functions. If you do, note that: These functions modify their first argument. The identity of the delimiting character is lost. These functions cannot be used on constant strings. The strtok() function uses a static buffer while parsing, so it's not thread safe. Use strtok_r() if this matters to you.
The strtok() function returns a pointer to the next token, or NULL if there are no more tokens.
strtok() SVID 3, POSIX, BSD 4.3, ISO 9899 strtok_r() POSIX.1c