33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 IO	in, out;		/* input/output state */  variable
108 	if (out.name == NULL) {  in setup()
110 		out.fd = STDOUT_FILENO;  in setup()
111 		out.name = "stdout";  in setup()
115 		out.fd = open(out.name, O_RDWR | OFLAGS, DEFFILEMODE);  in setup()
121 		if (out.fd == -1) {  in setup()
122 			out.fd = open(out.name, O_WRONLY | OFLAGS, DEFFILEMODE);  in setup()
123 			out.flags |= NOREAD;  in setup()
125 		if (out.fd == -1)  in setup()
126 			err(1, "%s", out.name);  in setup()
129 	getfdtype(&out);  in setup()
136 		if ((in.db = malloc(out.dbsz + in.dbsz - 1)) == NULL)  in setup()
138 		out.db = in.db;  in setup()
143 		out.db = malloc(out.dbsz + cbsz);  in setup()
144 		if (out.db == NULL)  in setup()
148 	out.dbp = out.db;  in setup()
153 	if (out.offset)  in setup()
164 		(void)ftruncate(out.fd, out.offset * out.dbsz);  in setup()
309 			out.dbcnt = in.dbcnt;  in dd_in()
341 	if (ddflags & C_OSYNC && out.dbcnt && out.dbcnt < out.dbsz) {  in dd_close()
343 			memset(out.dbp, ' ', out.dbsz - out.dbcnt);  in dd_close()
345 			memset(out.dbp, 0, out.dbsz - out.dbcnt);  in dd_close()
346 		out.dbcnt = out.dbsz;  in dd_close()
348 	if (out.dbcnt)  in dd_close()
351 		if (fsync(out.fd) == -1)  in dd_close()
352 			err(1, "fsync %s", out.name);  in dd_close()
365 	 * Write one or more blocks out.  The common case is writing a full  in dd_out()
380 	outp = out.db;  in dd_out()
381 	for (n = force ? out.dbcnt : out.dbsz;; n = out.dbsz) {  in dd_out()
383 			nw = write(out.fd, outp, cnt);  in dd_out()
385 				errx(1, "%s: end of device", out.name);  in dd_out()
388 					err(1, "%s", out.name);  in dd_out()
394 				if (n != out.dbsz)  in dd_out()
403 			if (out.flags & ISCHR && !warned) {  in dd_out()
406 				    out.name);  in dd_out()
408 			if (out.flags & ISTAPE)  in dd_out()
409 				errx(1, "%s: short write on tape device", out.name);  in dd_out()
411 		if ((out.dbcnt -= n) < out.dbsz)  in dd_out()
416 	if (out.dbcnt)  in dd_out()
417 		(void)memmove(out.db, out.dbp - out.dbcnt, out.dbcnt);  in dd_out()
418 	out.dbp = out.db + out.dbcnt;  in dd_out()