memmem(3) - NetBSD Manual Pages

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MEMMEM(3)               NetBSD Library Functions Manual              MEMMEM(3)


NAME

     memmem -- locate substring in byte string


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <string.h>

     void *
     memmem(const void *block, size_t blen, const void *pat, size_t plen);


DESCRIPTION

     The memmem() function locates the first occurrence of the binary string
     pat of size plen bytes in the byte string block of size blen bytes.


RETURN VALUES

     The memmem() function returns a pointer to the substring located, or NULL
     if no such substring exists within block.

     If plen is zero, block is returned, i.e. a zero length pat is deemed to
     match the start of the string, as with strstr(3).


SEE ALSO

     bm(3), memchr(3), strchr(3), strstr(3)


STANDARDS

     The memmem function conforms to IEEE Std 1003.1-2024 (``POSIX.1'').


HISTORY

     memmem() first appeared in the Free Software Foundation's glibc library.

NetBSD 10.99                   November 1, 2024                   NetBSD 10.99