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Linux 2.6 - man page for strsep (linux section 3)

STRSEP(3)			    Linux Programmer's Manual				STRSEP(3)

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 can-
       not  handle empty fields.  However, strtok(3) conforms to C89/C99 and hence is more porta-
       ble.

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
       This  page  is  part of release 3.55 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/.

GNU					    2011-09-28					STRSEP(3)


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