memset - Man Page

fill memory with a constant byte


#include <string.h>

void *memset(void *s, int c, size_t n);


The memset() function fills the first n bytes of the memory area pointed to by s with the constant byte c.

Return Value

The memset() function returns a pointer to the memory area s.


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

memset()Thread safetyMT-Safe

Conforming to

POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.

See Also

bstring(3), bzero(3), swab(3), wmemset(3)


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Referenced By

aio(7), bstring(3), bzero(3), feature_test_macros(7), kcapi_memset_secure(3), memhog(8), mount_setattr(2), openat2(2), pmem2_get_memmove_fn(3), pmem_memmove_persist(3), pmemobj_memcpy_persist(3), set_thread_area(2), signal-safety(7), system_data_types(7), wmemset(3).

2021-03-22 GNU Linux Programmer's Manual