memmem - locate a substring

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ memmem()                                                                    │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       In glibc 2.0, if needle is empty, memmem() returns a pointer to the last byte of haystack.  This is fixed
       in glibc 2.1.

       The memmem() function finds the start of the first occurrence of the substring needle of length needlelen
       in the memory area haystack of length haystacklen.

       musl libc 0.9.7; FreeBSD 6.0, OpenBSD 5.4, NetBSD, Illumos.

       Standard C library (libc, -lc)

       memmem - locate a substring

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

bstring(3), strstr(3)

Linux man-pages 6.9.1                              2024-05-02                                          memmem(3)

       None.

#define_GNU_SOURCE         /* See feature_test_macros(7) */
       #include<string.h>void*memmem(constvoidhaystack[.haystacklen],size_thaystacklen,constvoidneedle[.needlelen],size_tneedlelen);