INDEX(3) FreeBSD Library Functions Manual INDEX(3) NAME index, rindex — locate character in string LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include char * index(const char *s, int c); char * rindex(const char *s, int c); DESCRIPTION The index() and rindex() functions have been deprecated in favor of strchr(3) and strrchr(3). The index() function locates the first occurrence of c (converted to a char) in the string pointed to by s. The terminating null character is considered part of the string; therefore if c is ‘\0’, the functions locate the terminating ‘\0’. The rindex() function is identical to index(), except it locates the last occurrence of c. RETURN VALUES The functions index() and rindex() return a pointer to the located char‐ acter, or NULL if the character does not appear in the string. SEE ALSO memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3) HISTORY The index() and rindex() functions appeared in Version 6 AT&T UNIX. Their prototypes existed previously in before they were moved to for IEEE Std 1003.1-2001 (“POSIX.1”) compliance. The functions are not specified by IEEE Std 1003.1-2008 (“POSIX.1”). FreeBSD 10.0 March 20, 2011 FreeBSD 10.0