Name

strsep — extract token from string

Synopsis

#include <string.h>
char *strsep( char **  stringp,
  const char *  delim);
[Note] Note
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

This function suffers from the same problems as strtok(3). In particular, it modifies the original string. Avoid it.

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 2.79 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/.


  Copyright 1993 David Metcalfe (davidprism.demon.co.uk)

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References consulted:
    Linux libc source code
    Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
    386BSD man pages
Modified Sat Jul 24 18:00:10 1993 by Rik Faith (faithcs.unc.edu)
Modified Mon Jan 20 12:04:18 1997 by Andries Brouwer (aebcwi.nl)
Modified Tue Jan 23 20:23:07 2001 by Andries Brouwer (aebcwi.nl)