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Use FIODTYPE to unbogosify much of the file type checking in dd.

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This commit is contained in:
Brian Feldman 1999-08-27 16:36:46 +00:00
parent b5fca1cb2a
commit e08d7384ee
1 changed files with 15 additions and 10 deletions
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25
bin/dd/dd.c
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@ -46,12 +46,14 @@ static char const copyright[] =
static char sccsid[] = "@(#)dd.c 8.5 (Berkeley) 4/2/94";
#endif
static const char rcsid[] =
"$Id: dd.c,v 1.18 1999/06/20 14:58:51 green Exp $";
"$Id: dd.c,v 1.19 1999/07/13 18:44:56 green Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/conf.h>
#include <sys/diskslice.h>
#include <sys/filio.h>
#include <sys/mtio.h>
#include <ctype.h>
@ -224,19 +226,22 @@ static void
getfdtype(io)
IO *io;
{
struct mtget mt;
struct diskslices ds;
struct stat sb;
int type;
if (fstat(io->fd, &sb))
err(1, "%s", io->name);
if ((S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)) &&
ioctl(io->fd, DIOCGSLICEINFO, &ds) != -1)
io->flags |= ISDISK;
if (S_ISCHR(sb.st_mode))
io->flags |= ioctl(io->fd, MTIOCGET, &mt) ? ISCHR : ISTAPE;
else if (lseek(io->fd, (off_t)0, SEEK_CUR) == -1 && errno == ESPIPE)
io->flags |= ISPIPE; /* XXX fixed in 4.4BSD */
if (S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)) {
if (ioctl(io->fd, FIODTYPE, &type) == -1)
err(1, "%s", io->name);
if (type & D_TAPE)
io->flags |= ISTAPE;
else if (type & D_DISK)
io->flags |= ISDISK;
if (S_ISCHR(sb.st_mode) && (type & D_TAPE) == 0)
io->flags |= ISCHR;
} else if (!S_ISREG(sb.st_mode))
io->flags |= ISPIPE;
}
static void