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Implement 'speed' command: set a maximum read speed. At the moment it

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works on ATAPI drives only.

PR:		kern/35512 (a part of)
Submitted by:	Philipp Mergenthaler <philipp.mergenthaler@stud.uni-karlsruhe.de>
Reviewed by:	-hackers
MFC after:	1 month
This commit is contained in:
Maxim Konovalov 2002-05-08 07:32:40 +00:00
parent c4b689f10a
commit 4a28d4abff
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=96213
2 changed files with 22 additions and 0 deletions
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3
usr.sbin/cdcontrol/cdcontrol.1
View File

@ -155,6 +155,9 @@ Perform the hardware reset of the device.
Set minute-second-frame ioctl mode (default).
.It Cm set Ar lba
Set LBA ioctl mode.
.It Cm speed Ar s
Set the highest speed that the drive should use. The speed is a multiple of
the single speed. This command is currently only supported on ATAPI drives.
.It Cm quit
Quit the program.
.El

19
usr.sbin/cdcontrol/cdcontrol.c
View File

@ -24,6 +24,7 @@ static const char rcsid[] =
#endif /* not lint */
#include <sys/cdio.h>
#include <sys/cdrio.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/param.h>
@ -32,6 +33,7 @@ static const char rcsid[] =
#include <err.h>
#include <errno.h>
#include <histedit.h>
#include <limits.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
@ -73,6 +75,7 @@ static const char rcsid[] =
#define CMD_CDID 15
#define CMD_NEXT 16
#define CMD_PREVIOUS 17
#define CMD_SPEED 18
#define STATUS_AUDIO 0x1
#define STATUS_MEDIA 0x2
#define STATUS_VOLUME 0x4
@ -105,6 +108,7 @@ struct cmdtab {
{ CMD_VOLUME, "volume", 1,
"<l> <r> | left | right | mute | mono | stereo" },
{ CMD_CDID, "cdid", 2, "" },
{ CMD_SPEED, "speed", 2, "speed" },
{ 0, NULL, 0, NULL }
};
@ -277,7 +281,9 @@ int main (int argc, char **argv)
int run (int cmd, char *arg)
{
long speed;
int l, r, rc;
char *ep;
switch (cmd) {
@ -425,6 +431,19 @@ int run (int cmd, char *arg)
return setvol (l, r);
case CMD_SPEED:
if (fd < 0 && ! open_cd ())
return (0);
errno = 0;
speed = strtol(arg, &ep, 10);
if (*ep || ep == arg || speed <= 0 || speed > INT_MAX ||
errno != 0) {
warnx("invalid command arguments %s", arg);
return (0);
}
return ioctl(fd, CDRIOCREADSPEED, &speed);
default:
case CMD_HELP:
help ();