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STRSEP(3)                  Library Functions Manual                  STRSEP(3)

     strsep, stresep - separate strings

     Standard C Library (libc, -lc)

     #include <string.h>

     char *
     strsep(char **stringp, const char *delim);

     char *
     stresep(char **stringp, const char *delim, int escape);

     The strsep() function locates, in the nul-terminated string referenced by
     *stringp, the first occurrence of any character in the string delim (or
     the terminating `\0' character) and replaces it with a `\0'.  The
     location of the next character after the delimiter character (or NULL, if
     the end of the string was reached) is stored in *stringp.  The original
     value of *stringp is returned.

     An "empty" field, i.e., one caused by two adjacent delimiter characters,
     can be detected by comparing the location referenced by the pointer
     returned by strsep() to `\0'.

     If *stringp is initially NULL, strsep() returns NULL.  The stresep()
     function also takes an escape character that allows quoting the delimiter
     character so that it can be part of the source string.

     The following uses strsep() to parse a string, containing tokens
     delimited by white space, into an argument vector:

           char **ap, *argv[10], *inputstring;

           for (ap = argv; ap < &argv[9] &&
               (*ap = strsep(&inputstring, " \t")) != NULL;) {
                   if (**ap != '\0')

     The strsep() function is intended as a replacement for the strtok()
     function.  While the strtok() function should be preferred for
     portability reasons (it conforms to ANSI X3.159-1989 ("ANSI C89")) it is
     unable to handle empty fields, i.e., detect fields delimited by two
     adjacent delimiter characters, or to be used for more than a single
     string at a time.  The strsep() function first appeared in 4.4BSD.

NetBSD 9.99                     August 12, 2006                    NetBSD 9.99