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strsep.3

STRSEP

Section: Linux Programmer's Manual (3)
Updated: 2009-01-16
Index Return to Main Contents
 

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 3.21 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/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
CONFORMING TO
NOTES
BUGS
SEE ALSO
COLOPHON

 

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