On 2021-09-04 16:37, Ken Brown via Cygwin wrote:
I've reduced the procps failure to the following test case:
$ cat mmap_test.c
#include <unistd.h>
#include <stdio.h>
#include <sys/mman.h>
int
main ()
{
void *addr;
int page_size = getpagesize ();
addr = mmap (0, page_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (addr == MAP_FAILED)
perror ("mmap");
}
$ gcc mmap_test.c
$ ./a
mmap: Invalid argument
Check on Linux and retry on Cygwin without MAP_PRIVATE?
MAP_PRIVATE implies an fd but MAP_ANON does not, and MAP_ANON is in
Linux(2)/Unix? not POSIX(3p).
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
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