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REALLOCARR(3) Library Functions Manual REALLOCARR(3) NAME reallocarr - reallocate array SYNOPSIS #include <stdlib.h> int reallocarr(void *ptr, size_t number, size_t size); DESCRIPTION The reallocarr function reallocates the memory in *ptr. RETURN VALUES On successful completion, returns 0 and updates *ptr. Otherwise, an error code (see errno(2)) is returned and *ptr and the referenced memory is unmodified. EXAMPLES The following uses reallocarr() to initialize an array of INITSIZE integers, then resizes it to NEWSIZE elements: int *data = NULL; int ret = 0; ret = reallocarr(&data, INITSIZE, sizeof(*data)); if (ret) errc(1, ret, "reallocarr failed"); ret = reallocarr(&data, NEWSIZE, sizeof(*data)); if (ret) errc(1, ret, "reallocarr failed on resize"); SEE ALSO calloc(3) HISTORY reallocarr first appeared in NetBSD 7.0. OpenBSD introduced the reallocarray(3) function for the same purpose, but the interface makes it difficult to correctly handle zero-sized allocations. NetBSD 8.0 February 19, 2015 NetBSD 8.0