Manpages - memmem.3

memmem - locate a substring

  #define _GNU_SOURCE /* See feature_test_macros(7) */
  #include <string.h>

  void *memmem(const void *haystack, size_t haystacklen,
   const void *needle, size_t needlelen);

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.

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

For an explanation of the terms used in this section, see *attributes*(7).

This function is not specified in POSIX.1, but is present on a number of other systems.

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.

*bstring*(3), *strstr*(3)

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