1INDEX(3)                   Linux Programmer's Manual                  INDEX(3)
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NAME

6       index, rindex - locate character in string
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SYNOPSIS

9       #include <strings.h>
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11       char *index(const char *s, int c);
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13       char *rindex(const char *s, int c);
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DESCRIPTION

16       The  index()  function returns a pointer to the first occurrence of the
17       character c in the string s.
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19       The rindex() function returns a pointer to the last occurrence  of  the
20       character c in the string s.
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22       The  terminating  null  byte  ('\0')  is considered to be a part of the
23       strings.
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RETURN VALUE

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

30       For   an   explanation   of   the  terms  used  in  this  section,  see
31       attributes(7).
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33       ┌──────────────────┬───────────────┬─────────┐
34       │Interface         │ Attribute     │ Value   │
35       ├──────────────────┼───────────────┼─────────┤
36       │index(), rindex() │ Thread safety │ MT-Safe │
37       └──────────────────┴───────────────┴─────────┘

CONFORMING TO

39       4.3BSD; marked as LEGACY in  POSIX.1-2001.   POSIX.1-2008  removes  the
40       specifications of index() and rindex(), recommending strchr(3) and str‐
41       rchr(3) instead.
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SEE ALSO

44       memchr(3), strchr(3),  string(3),  strpbrk(3),  strrchr(3),  strsep(3),
45       strspn(3), strstr(3), strtok(3)
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COLOPHON

48       This  page  is  part of release 4.15 of the Linux man-pages project.  A
49       description of the project, information about reporting bugs,  and  the
50       latest     version     of     this    page,    can    be    found    at
51       https://www.kernel.org/doc/man-pages/.
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55GNU                               2015-03-02                          INDEX(3)
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