1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
70 void	(*cfunc)(void);		/* conversion function */
73 uint64_t	ddflags = 0;	/* conversion options */
74 size_t	cbsz;			/* conversion block size */
76 const	u_char *ctab;		/* conversion table */
106 	while (files_cnt--)  in main()
116 	if (close(out.fd) == -1 && errno != EINTR)  in main()
149 		if (in.fd == -1)  in setup()
156 	if (caph_rights_limit(in.fd, &rights) == -1)  in setup()
160 		errx(1, "files is not supported for non-tape devices");  in setup()
171 			if (oflags == -1)  in setup()
174 			if (fcntl(out.fd, F_SETFL, oflags) == -1)  in setup()
193 		if (out.fd == -1) {  in setup()
200 		if (out.fd == -1)  in setup()
206 	if (caph_rights_limit(out.fd, &rights) == -1)  in setup()
208 	if (caph_ioctls_limit(out.fd, cmds, nitems(cmds)) == -1)  in setup()
212 		if (caph_limit_stdin() == -1)  in setup()
217 		if (caph_limit_stdout() == -1)  in setup()
222 		if (caph_limit_stderr() == -1)  in setup()
231 		if ((in.db = malloc((size_t)out.dbsz + in.dbsz - 1)) == NULL)  in setup()
238 	/* dbp is the first free position in each buffer. */  in setup()
254 		if (ftruncate(out.fd, out.offset * out.dbsz) == -1)  in setup()
282 			 * This should strictly speaking be a no-op, but I  in setup()
316 	if (fstat(io->fd, &sb) == -1)  in getfdtype()
317 		err(1, "%s", io->name);  in getfdtype()
319 		io->flags |= ISTRUNC;  in getfdtype()
321 		if (ioctl(io->fd, FIODTYPE, &type) == -1) {  in getfdtype()
322 			err(1, "%s", io->name);  in getfdtype()
325 				io->flags |= ISTAPE;  in getfdtype()
327 				io->flags |= ISSEEK;  in getfdtype()
329 				io->flags |= ISCHR;  in getfdtype()
334 	if (lseek(io->fd, (off_t)0, SEEK_CUR) == -1 && errno == ESPIPE)  in getfdtype()
335 		io->flags |= ISPIPE;  in getfdtype()
337 		io->flags |= ISSEEK;  in getfdtype()
341  * Limit the speed by adding a delay before every block read.
342  * The delay (t_usleep) is equal to the time computed from block
353 	t_io = t_now - t_prev - t_usleep;  in speed_limit()
355 	t_usleep = t_target - t_io;  in speed_limit()
374 		len -= 2;  in swapbytes()
385 		case -1:			/* count=0 was specified */  in dd_in()
399 		 * Zero the buffer first if sync; if doing block operations,  in dd_in()
414 		n = read(in.fd, in.dbp + in.dbrcnt, in.dbsz - in.dbrcnt);  in dd_in()
422 		if (n == -1) {  in dd_in()
435 			 * raw disks this section should be modified to re-read  in dd_in()
480 				--n;  in dd_in()
510 			memset(out.dbp, fill_char, out.dbsz - out.dbcnt);  in dd_close()
512 			memset(out.dbp, ' ', out.dbsz - out.dbcnt);  in dd_close()
514 			memset(out.dbp, 0, out.dbsz - out.dbcnt);  in dd_close()
525 		if (ftruncate(out.fd, out.seek_offset) == -1)  in dd_close()
530 		if (fsync(out.fd) == -1)  in dd_close()
533 		if (fdatasync(out.fd) == -1)  in dd_close()
560 	 * One special case is if we're forced to do the write -- in that case  in dd_out()
566 	 * If force, first try to write all pending data, else try to write  in dd_out()
590 					if (out.seek_offset == -1)  in dd_out()
632 			cnt -= nw;  in dd_out()
635 		if ((out.dbcnt -= n) < out.dbsz)  in dd_out()
641 		(void)memmove(out.db, out.dbp - out.dbcnt, out.dbcnt);  in dd_out()