Author: trasz
Date: Wed Sep 21 11:17:58 2016
New Revision: 306094
URL: https://svnweb.freebsd.org/changeset/base/306094

Log:
  Make it possible for diskinfo(8) to operate on files.  This is useful
  with -t and upcoming -i.
  
  MFC after:    1 month

Modified:
  head/usr.sbin/diskinfo/diskinfo.c

Modified: head/usr.sbin/diskinfo/diskinfo.c
==============================================================================
--- head/usr.sbin/diskinfo/diskinfo.c   Wed Sep 21 10:58:58 2016        
(r306093)
+++ head/usr.sbin/diskinfo/diskinfo.c   Wed Sep 21 11:17:58 2016        
(r306094)
@@ -42,6 +42,7 @@
 #include <err.h>
 #include <sys/disk.h>
 #include <sys/param.h>
+#include <sys/stat.h>
 #include <sys/time.h>
 
 static void
@@ -61,6 +62,7 @@ static int zonecheck(int fd, uint32_t *z
 int
 main(int argc, char **argv)
 {
+       struct stat sb;
        int i, ch, fd, error, exitval = 0;
        char buf[BUFSIZ], ident[DISK_IDENT_SIZE], physpath[MAXPATHLEN];
        char zone_desc[64];
@@ -92,7 +94,7 @@ main(int argc, char **argv)
                usage();
 
        for (i = 0; i < argc; i++) {
-               fd = open(argv[i], O_RDONLY);
+               fd = open(argv[i], O_RDONLY | O_DIRECT);
                if (fd < 0 && errno == ENOENT && *argv[i] != '/') {
                        sprintf(buf, "%s%s", _PATH_DEV, argv[i]);
                        fd = open(buf, O_RDONLY);
@@ -102,33 +104,48 @@ main(int argc, char **argv)
                        exitval = 1;
                        goto out;
                }
-               error = ioctl(fd, DIOCGMEDIASIZE, &mediasize);
-               if (error) {
-                       warnx("%s: ioctl(DIOCGMEDIASIZE) failed, probably not a 
disk.", argv[i]);
+               error = fstat(fd, &sb);
+               if (error != 0) {
+                       warn("cannot stat %s", argv[i]);
                        exitval = 1;
                        goto out;
                }
-               error = ioctl(fd, DIOCGSECTORSIZE, &sectorsize);
-               if (error) {
-                       warnx("%s: ioctl(DIOCGSECTORSIZE) failed, probably not 
a disk.", argv[i]);
-                       exitval = 1;
-                       goto out;
-               }
-               error = ioctl(fd, DIOCGFWSECTORS, &fwsectors);
-               if (error)
+               if (S_ISREG(sb.st_mode)) {
+                       mediasize = sb.st_size;
+                       sectorsize = S_BLKSIZE;
                        fwsectors = 0;
-               error = ioctl(fd, DIOCGFWHEADS, &fwheads);
-               if (error)
                        fwheads = 0;
-               error = ioctl(fd, DIOCGSTRIPESIZE, &stripesize);
-               if (error)
-                       stripesize = 0;
-               error = ioctl(fd, DIOCGSTRIPEOFFSET, &stripeoffset);
-               if (error)
+                       stripesize = sb.st_blksize;
                        stripeoffset = 0;
-               error = zonecheck(fd, &zone_mode, zone_desc, sizeof(zone_desc));
-               if (error == 0)
-                       zoned = 1;
+               } else {
+                       error = ioctl(fd, DIOCGMEDIASIZE, &mediasize);
+                       if (error) {
+                               warnx("%s: ioctl(DIOCGMEDIASIZE) failed, 
probably not a disk.", argv[i]);
+                               exitval = 1;
+                               goto out;
+                       }
+                       error = ioctl(fd, DIOCGSECTORSIZE, &sectorsize);
+                       if (error) {
+                               warnx("%s: ioctl(DIOCGSECTORSIZE) failed, 
probably not a disk.", argv[i]);
+                               exitval = 1;
+                               goto out;
+                       }
+                       error = ioctl(fd, DIOCGFWSECTORS, &fwsectors);
+                       if (error)
+                               fwsectors = 0;
+                       error = ioctl(fd, DIOCGFWHEADS, &fwheads);
+                       if (error)
+                               fwheads = 0;
+                       error = ioctl(fd, DIOCGSTRIPESIZE, &stripesize);
+                       if (error)
+                               stripesize = 0;
+                       error = ioctl(fd, DIOCGSTRIPEOFFSET, &stripeoffset);
+                       if (error)
+                               stripeoffset = 0;
+                       error = zonecheck(fd, &zone_mode, zone_desc, 
sizeof(zone_desc));
+                       if (error == 0)
+                               zoned = 1;
+               }
                if (!opt_v) {
                        printf("%s", argv[i]);
                        printf("\t%u", sectorsize);
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