memccpy(3) — Linux manual page

memccpy(3)               Library Functions Manual              memccpy(3)

NAME         top

       memccpy - memory until-and-including-character copy

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <string.h>  // see memory.h(3head)

       void *memccpy(size_t n;
                     void dest[restrict n], const void src[restrict n],
                     int c, size_t n);

DESCRIPTION         top

       The memccpy() function copies no more than n bytes from memory
       area src to memory area dest, stopping when the character c is
       found (c is copied).

       If the memory areas overlap, the results are undefined.

RETURN VALUE         top

       The memccpy() function returns a pointer to the next character in
       dest after c, or NULL if c was not found in the first n characters
       of src.

ATTRIBUTES         top

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

STANDARDS         top

       POSIX.1-2008.

HISTORY         top

       POSIX.1-2001, SVr4, 4.3BSD.

CAVEATS         top

       This function has recently (since C23) started being misused for
       copying strings with truncation.  That's not its intended use, and
       is most likely to result in bugs if used for that.  This function
       was designed for the quite different (and niche) task of
       implementing fgets(3).

SEE ALSO         top

       memory.h(3head)

COLOPHON         top

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Linux man-pages 6.19            2026-08-10                     memccpy(3)

Pages that refer to this page: bcopy(3),  memory.h(3head),  mempcpy(3),  signal-safety(7),  string_copying(7)

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