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/* this tests whether we can use mremap */
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#define DATA "conftest.mmap"
#ifndef MAP_FILE
#define MAP_FILE 0
#endif
#ifndef MAP_FAILED
#define MAP_FAILED (int *)-1
#endif
int main(void)
{
int *buf;
int fd;
int err = 1;
fd = open(DATA, O_RDWR|O_CREAT|O_TRUNC, 0666);
if (fd == -1) {
exit(1);
}
buf = (int *)mmap(NULL, 0x1000, PROT_READ | PROT_WRITE,
MAP_FILE | MAP_SHARED, fd, 0);
if (buf == MAP_FAILED) {
goto done;
}
buf = mremap(buf, 0x1000, 0x2000, MREMAP_MAYMOVE);
if (buf == MAP_FAILED) {
goto done;
}
err = 0;
done:
close(fd);
unlink(DATA);
exit(err);
}
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