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diff --git a/stand/libsa/libsa.3 b/stand/libsa/libsa.3
--- a/stand/libsa/libsa.3
+++ b/stand/libsa/libsa.3
@@ -710,7 +710,9 @@
int (*dv_ioctl)(struct open_file *f, u_long cmd, void *data);
int (*dv_print)(int verbose);
void (*dv_cleanup)(void);
- void (*dv_fmtdev)(struct devdesc *);
+ char * (*dv_fmtdev)(struct devdesc *);
+ int (*dv_parsedev)(struct devdesc **dev, const char *devpart,
+ const char **path);
};
.Ed
.Bl -tag -width ".Fn dv_strategy"
@@ -751,6 +753,34 @@
.It Fn dv_fmtdev
Converts the specified devdesc to the canonical string representation
for that device.
+.It Fn dv_parsedev
+Parses the device portion of a file path.
+The
+.Dv devpart
+will point to the
+.Sq tail
+of device name, possibly followed by a colon and a path within the device.
+The
+.Sq tail
+is, by convention, the part of the device specification that follows the
+.Fa dv_name
+part of the string.
+So when parsing the string
+.Dq disk3p5:/xxx
+.Dv devpart
+will point to the
+.Sq 3
+in that string.
+The parsing routine is expected to allocate a new
+.Dv struct devdesc
+or subclass and return it in
+.Dv dev
+when successful.
+This routine should set
+.Dv path
+to point to the portion of the string after device specification, or
+.Dq /xxx
+in the earlier example.
.El
.Sh HISTORY
The
diff --git a/stand/libsa/stand.h b/stand/libsa/stand.h
--- a/stand/libsa/stand.h
+++ b/stand/libsa/stand.h
@@ -160,6 +160,7 @@
int (*dv_print)(int verbose); /* print device information */
void (*dv_cleanup)(void);
char * (*dv_fmtdev)(struct devdesc *);
+ int (*dv_parsedev)(struct devdesc **, const char *, const char **);
};
/*

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