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 with a '\0' character (by overwriting the delimiter) 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), strpbrk(3), strspn(3), strstr(3), strtok(3)

COLOPHON¶

This page is part of release 3.22 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.