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strstr (3)
  • strstr (3) ( FreeBSD man: Библиотечные вызовы )
  • strstr (3) ( Русские man: Библиотечные вызовы )
  • >> strstr (3) ( Linux man: Библиотечные вызовы )
  • strstr (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    strstr, strcasestr - locate a substring
     
    

    SYNOPSIS

    #include <string.h>
    
    char *strstr(const char *haystack, const char *needle);
    
    #define _GNU_SOURCE
    
    #include <string.h>
    
    char *strcasestr(const char *haystack, const char *needle);
    
     

    DESCRIPTION

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

    The strcasestr() function is like strstr(), but ignores the case of both arguments.  

    RETURN VALUE

    These functions return a pointer to the beginning of the substring, or NULL if the substring is not found.  

    CONFORMING TO

    The strstr() function conforms to C89 and C99. The strcasestr() function is a non-standard extension.  

    BUGS

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

    SEE ALSO

    index(3), memchr(3), rindex(3), strcasecmp(3), strchr(3), strpbrk(3), strsep(3), strspn(3), strtok(3), wcsstr(3), feature_test_macros(7)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    CONFORMING TO
    BUGS
    SEE ALSO
    COLOPHON


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