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NAME

       strstr - locate a substring

SYNOPSIS

       #include <string.h>

       char *strstr(const char *haystack, const char *needle);

DESCRIPTION

       The  strstr()  function  finds  the  first  occurrence of the substring
       needle in the string haystack.  The terminating `\0' characters are not
       compared.

RETURN VALUE

       The  strstr()  function  returns  a  pointer  to  the  beginning of the
       substring, or NULL if the substring is not found.

BUGS

       Early versions of Linux libc (like 4.5.26) would  not  allow  an  empty
       argument.  Later  versions  (like  4.6.27)  work  correctly, and return
       haystack when needle is empty.

SEE ALSO

       index(3),  memchr(3),  rindex(3),  strchr(3),  strpbrk(3),   strsep(3),
       strspn(3), strtok(3)