writev() does not accept count 0 but it should
$ cat test.c
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/uio.h>
int main()
{
struct iovec vec;
memset(&vec, 0, sizeof(vec));
if (writev(1, &vec, 0) < 0)
perror("writev");
return 0;
}
Linux:
$ gcc -Wall test.c
$ ./a.out
Cygwin:
$ gcc -Wall test.c
$ ./a.exe
writev: Invalid argument
This behavior is buggy per:
EINVAL ... the vector count count is less than zero or greater than the
permitted maximum ...
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