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MEMMEM(3) 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 is not currently standardized. However, it is meant to be API compatible with functions in FreeBSD and Linux. HISTORY memmem() first appeared in the Free Software Foundation's glibc library. NetBSD 9.99 March 12, 2005 NetBSD 9.99