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index(3)

INDEX(3)                   Linux Programmer's Manual                  INDEX(3)

NAME
       index, rindex - locate character in string

SYNOPSIS
       #include <strings.h>

       char *index(const char *s, int c);

       char *rindex(const char *s, int c);

DESCRIPTION
       The  index()  function returns a pointer to the first occurrence of the
       character c in the string s.

       The rindex() function returns a pointer to the last occurrence  of  the
       character c in the string s.

       The  terminating  null  byte  ('\0')  is considered to be a part of the
       strings.

RETURN VALUE
       The index() and rindex() functions return  a  pointer  to  the  matched
       character or NULL if the character is not found.

ATTRIBUTES
       For  an  explanation  of  the  terms  used in this section, see attrib‐
       utes(7).  allbox; lb lb lb l l  l.   Interface Attribute Value  T{  in‐
       dex(), rindex() T}   Thread safety  MT-Safe

CONFORMING TO
       4.3BSD;  marked  as  LEGACY  in POSIX.1-2001.  POSIX.1-2008 removes the
       specifications of index() and rindex(), recommending strchr(3) and str‐
       rchr(3) instead.

SEE ALSO
       memchr(3), strchr(3),  string(3),  strpbrk(3),  strrchr(3),  strsep(3),
       strspn(3), strstr(3), strtok(3)

COLOPHON
       This  page  is  part of release 5.02 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest     version     of     this    page,    can    be    found    at
       https://www.kernel.org/doc/man-pages/.

GNU                               2019-03-06                          INDEX(3)
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