Re: Getting scsi serial number of a device in Solaris

From: babak (hamadani_at_uclink.berkeley.edu)
Date: 10/02/03 

Date: 2 Oct 2003 11:36:32 -0700

Hi Richard
This is the result that I get:
> scsi-inquiry-demo /dev/dsk/c0t6d0s0
scsi-inquiry-demo: /dev/dsk/c0t6d0s0: open() failed: Device busy
Exit 2

Is there anything I can do about it?
Thanks

Richard.L.Hamilton@mindwarp.smart.net (Richard L. Hamilton) wrote in message news:<vnmckrc0gokbeb@corp.supernews.com>...
> In article <bb6f754a.0310010851.d01b62e@posting.google.com>,
> hamadani@uclink.berkeley.edu (babak) writes:
> > Hi
> > How can I programmatically get the scsi serial number & vendor id of a
> > scsi device (vital product data)?
> > I read a little about scsi-2 "inquiry" command, but is there a system
> > library that provides access to it? Is this command available on
> > scsi-3?
> > Thanks
>
> There isn't a function that does just that, but there is an ioctl that
> will allow one to use all sorts of SCSI commands, although it's a bit
> tedious to use. Newer versions (8 and later for sure) of Solaris document
> it in the uscsi(7i) man page. And you have to be root to use the USCSICMD
> ioctl, because it's potentially quite dangerous.
>
> But it's no big deal to write a function to make it easier to use; in
> fact, I just did it now (although I did have some similar code handy to
> get it done faster). The first item below is just such a function. The
> second is a simple main() function to exercise it, and finally there's
> some sample output.
>
> I don't think it cares what flavor of supported SCSI is involved. In
> fact, it will even work on IDE or USB CD-ROM drives, although at present
> it appears that it will _not_ work on IDE disk drives.
>
> =========================== cut here ===========================
> /* scsi-inquiry.c - wrap USCSICMD ioctl to make doing a SCSI inquiry easier */
> /* Returns: -1 if error, else 0 */
> #include <unistd.h>
> #include <string.h>
> #include <sys/scsi/generic/commands.h>
> #include <sys/scsi/generic/inquiry.h>
> #include <sys/scsi/impl/uscsi.h>
>
> int
> scsi_inquiry(int fd, struct scsi_inquiry *inq)
> {
> struct uscsi_cmd ucmd;
> union scsi_cdb cdb;
>
> memset(&cdb,0,sizeof(cdb));
> memset(inq,0,sizeof(*inq));
> memset(&ucmd,0,sizeof(ucmd));
>
> ucmd.uscsi_flags=USCSI_DIAGNOSE|USCSI_ISOLATE|USCSI_READ;
> cdb.scc_cmd = SCMD_INQUIRY;
> ucmd.uscsi_bufaddr = (caddr_t)inq;
> ucmd.uscsi_buflen = cdb.g0_count0 = sizeof(*inq);
> ucmd.uscsi_cdb=(caddr_t)&cdb;
> ucmd.uscsi_cdblen=CDB_GROUP0;
>
> return ioctl(fd, USCSICMD,&ucmd) == -1?-1:0;
> }
> =========================== cut here ===========================
>
>
> =========================== cut here ===========================
> /* scsi-inquiry-demo.c - a little main() to demonstrate scsi-inquiry.c */
> #include <stdio.h>
> #include <sys/types.h>
> #include <sys/stat.h>
> #include <fcntl.h>
> #include <string.h>
> #include <unistd.h>
>
> /* following required for scsi inquiry data structure */
> #include <sys/scsi/generic/inquiry.h>
> /* declaration of my function, assuming it may be in another object file */
> extern int scsi_inquiry(int, struct scsi_inquiry *);
>
> /* flavors or perror() that take extra args to be a bit more informative */
> void perror3(const char *s1, const char *s2, const char *s3)
> {
> static const char colon_space[]={ ':',' '};
> if (s1!=NULL && *s1!='\0') {
> write(2,s1,strlen(s1));
> write(2,colon_space,sizeof colon_space);
> }
> if (s2!=NULL && *s2!='\0') {
> write(2,s2,strlen(s2));
> write(2,colon_space,sizeof colon_space);
> }
> perror(s3);
> }
> void perror2(const char *s1, const char *s2)
> {
> static const char colon_space[]={ ':',' '};
> if (s1!=NULL && *s1!='\0') {
> write(2,s1,strlen(s1));
> write(2,colon_space,sizeof colon_space);
> }
> perror(s2);
> }
>
> int
> main(int argc, char **argv)
> {
> int fd, arg, err=0;
> struct scsi_inquiry inq;
> struct stat statb;
>
> if (argc<2) {
> fprintf(stderr,"usage: %s scsi_dev ...\n",argv[0]);
> return 1;
> }
>
> for (arg=1;arg<argc;arg++) {
> if ((fd=open(argv[arg],O_RDONLY)) == -1) {
> perror3(argv[0],argv[arg],"open() failed");
> ++err;
> continue;
> }
> if ((fstat(fd,&statb)) == -1) {
> perror3(argv[0],argv[arg],"stat() failed");
> ++err;
> close(fd);
> continue;
> }
> if (!S_ISCHR(statb.st_mode)) {
> fprintf(stderr,"%s: %s: not a character special device\n",
> argv[0],argv[arg]);
> ++err;
> close(fd);
> continue;
> }
> if (scsi_inquiry(fd,&inq) == -1) {
> perror3(argv[0],argv[arg],"scsi inquiry failed");
> ++err;
> close(fd);
> continue;
> }
> /* max field width as a parameter for the fields since they may not
> be null-terminated */
> printf("%s:\n\tVendor ID:\t%.*s\n\tProduct ID:\t%.*s\n\tRevision:\t%.*s\n\tSerial number: %.*s\n",
> argv[arg],
> sizeof(inq.inq_vid),inq.inq_vid,
> sizeof(inq.inq_pid),inq.inq_pid,
> sizeof(inq.inq_revision),inq.inq_revision,
> sizeof(inq.inq_serial),inq.inq_serial);
> close(fd);
> }
> if (err) /* i.e. 1 is for usage, anything higher is error count + 1 */
> return err+1;
> return 0;
> }
> =========================== cut here ===========================
>
> sample output:
> # scsi-inquiry /dev/rdsk/c0t0d0s2
> /dev/rdsk/c0t0d0s2:
> Vendor ID: SEAGATE
> Product ID: ST31200N SUN1.05
> Revision: 8722
> Serial number: 00494102
>
>
> (that was on a SPARC 10, running Solaris 8; probably not an original drive)
>
> # scsi-inquiry /dev/rdsk/c0t1d0s2
> /dev/rdsk/c0t1d0s2:
> Vendor ID: LITEON
> Product ID: DVD-ROM LTD163
> Revision: GH4W
> Serial number:
>
> (that was on a Sun Blade 100 running Solaris 9, on which the original
> LITEON CD-ROM was replaced with a LITEON DVD-ROM drive; note: I may have
> reshuffled where the device was when I added an extra disk drive)
>
> # scsi-inquiry /dev/rdsk/c1t0d0s2
> /dev/rdsk/c1t0d0s2:
> Vendor ID: IOMEGA
> Product ID: CDRW960207DA1110
> Revision: 0Sab
> Serial number:
>
> (that was on the same Sun Blade 100, showing an attached Iomega Predator
> model CDRW9602EXT-B USB CDRW drive; for both the DVD-ROM and CDRW drives,
> volume management was turned off to make this simpler, although it also
> worked (but still only as root) with volume management on, as in
> # scsi-inquiry /vol/dev/rdsk/c0t1d0/sol_9_803_sparc/s0
> )

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