strsep - extract token from string
char *strsep(char **stringp, const char *delim);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
Since glibc 2.19:
Glibc 2.19 and earlier:
If *stringp is NULL, the strsep() function returns NULL and does
nothing else. Otherwise, this function finds the first token in the string
*stringp, that is delimited by one of the bytes in the string
delim. This token is terminated by overwriting the delimiter with a
null byte ('\0'), and *stringp is updated to point past the token. In
case no delimiter was found, the token is taken to be the entire string
*stringp, and *stringp is made NULL.
The strsep() function returns a pointer to the token, that is, it returns
the original value of *stringp.
For an explanation of the terms used in this section, see attributes(7).
The strsep() function was introduced as a replacement for
strtok(3), since the latter cannot handle empty fields. However,
strtok(3) conforms to C89/C99 and hence is more portable.
Be cautious when using this function. If you do use it, note that:
- This function modifies its first argument.
- This function cannot be used on constant strings.
- The identity of the delimiting character is lost.
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