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--- readcd/readcd.c.original Sun Jan 15 17:14:03 2006
+++ readcd/readcd.c Sun Jan 15 17:24:47 2006
@@ -370,6 +370,8 @@
exit(err);
}
} else {
+ char errstr[80];
+
if (scsibus == -1 && target >= 0 && lun >= 0)
scsibus = 0;
@@ -378,8 +380,17 @@
scgp->kdebug = kdebug;
scg_settarget(scgp, scsibus, target, lun);
- if (scg__open(scgp, NULL) <= 0)
- comerr("Cannot open SCSI driver.\n");
+
+ scgp = scg_open(dev, errstr, sizeof(errstr), 0, 0);
+
+ if (scgp == NULL) {
+ errmsg("%s%sCannot open SCSI driver.\n", errstr, errstr[0]?". ":"");
+ errmsgno(EX_BAD, "For possible targets try 'readcd -scanbus'.%s\n",
+ geteuid() ? " Make sure you are root.":"");
+ errmsgno(EX_BAD, "For possible transport specifiers try 'readcd dev=help'.\n");
+ exit(EX_BAD);
+ }
+
}
scgp->silent = silent;
scgp->verbose = verbose;
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