strsep man page

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():
   Since glibc 2.19:
       _DEFAULT_SOURCE
   Glibc 2.19 and earlier:
       _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, 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.

Return Value

The strsep() function returns a pointer to the token, that is, it returns the original value of *stringp.

Attributes

For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
strsep() Thread safety MT-Safe

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:

See Also

index(3), memchr(3), rindex(3), strchr(3), string(3), strpbrk(3), strspn(3), strstr(3), strtok(3)

Colophon

This page is part of release 4.09 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

Referenced By

index(3), memchr(3), strchr(3), string(3), strnstr(3), strpbrk(3), strspn(3), strstr(3), strtok(3).

2016-03-15 GNU Linux Programmer's Manual