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():
           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:

       * 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)

COLOPHON

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       project, information about reporting bugs, and the latest version of  this  page,  can  be
       found at https://www.kernel.org/doc/man-pages/.