strsep(3) - Linux man page
Name
strsep - extract token from string
Synopsis
#include <string.h> char *strsep(char **stringp, const char *delim);Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
- strsep(): _BSD_SOURCE
Description
If *stringp is NULL, the strsep() function returns NULL and does nothing else. Otherwise, this function finds the first token in the string *stringp, where tokens are delimited by symbols 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.
Return Value
The strsep() function returns a pointer to the token, that is, it returns the original value of *stringp.
Conforming To
4.4BSD.
Notes
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.
Bugs
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.
See Also
index(3), memchr(3), rindex(3), strchr(3), string(3), strpbrk(3), strspn(3), strstr(3), strtok(3)