38 lines
614 B
C
38 lines
614 B
C
#include <mlvalues.h>
|
|
#include "unix.h"
|
|
|
|
#ifdef HAS_DUP2
|
|
|
|
value unix_dup2(fd1, fd2) /* ML */
|
|
value fd1, fd2;
|
|
{
|
|
if (dup2(Int_val(fd1), Int_val(fd2)) == -1) uerror("dup2", Nothing);
|
|
return Val_unit;
|
|
}
|
|
|
|
#else
|
|
|
|
static int do_dup2(fd1, fd2)
|
|
int fd1, fd2;
|
|
{
|
|
int fd;
|
|
int res;
|
|
|
|
fd = dup(fd1);
|
|
if (fd == -1) return -1;
|
|
if (fd == fd2) return 0;
|
|
res = do_dup2(fd1, fd2);
|
|
close(fd);
|
|
return res;
|
|
}
|
|
|
|
value unix_dup2(fd1, fd2) /* ML */
|
|
value fd1, fd2;
|
|
{
|
|
close(Int_val(fd2));
|
|
if (do_dup2(Int_val(fd1), Int_val(fd2)) == -1) uerror("dup2", Nothing);
|
|
return Val_unit;
|
|
}
|
|
|
|
#endif
|