strsep - extract token from string
#include <string.h>
char *strsep(char **stringp, const char *delim);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
strsep():
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE
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).
| Interface |
Attribute |
Value |
| strsep () |
Thread safety |
MT-Safe |
4.4BSD.
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.
index(3),
memchr(3),
rindex(3),
strchr(3),
string(3),
strpbrk(3),
strspn(3),
strstr(3),
strtok(3)