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strsep(3)

NAME

     strsep -- separate strings

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <string.h>

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

DESCRIPTION

     The strsep() function locates, in the 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., a character in the string delim occurs as the
     first character of *stringp) can be detected by comparing the location
     referenced by the returned pointer to `\0'.

     If *stringp is initially NULL, strsep() returns NULL.

EXAMPLES

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

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

	   for (ap = argv; (*ap = strsep(&inputstring, " \t")) != NULL;)
		   if (**ap != '\0')
			   if (++ap >= &argv[10])
				   break;

SEE ALSO

     memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strspn(3),
     strstr(3), strtok(3)

HISTORY

     The strsep() function is intended as a replacement for the strtok() func-
     tion.  While the strtok() function should be preferred for portability
     reasons (it conforms to ISO/IEC 9899:1990 (``ISO C90'')) it is unable to
     handle empty fields, i.e., detect fields delimited by two adjacent delim-
     iter characters, or to be used for more than a single string at a time.
     The strsep() function first appeared in 4.4BSD.

FreeBSD 5.4			 June 9, 1993			   FreeBSD 5.4

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