From: Hannes Reinecke <hare@suse.de>
Date: Wed, 25 Jul 2007 13:24:58 +0000 (+0200)
Subject: add $driver subtitution
X-Git-Tag: 174~1878
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=fea9b2d2924235a459e888ecd35a8b43093b9542

add $driver subtitution
---

diff --git a/udev.7 b/udev.7
index d3ed4b71d..821a476ae 100644
--- a/udev.7
+++ b/udev.7
@@ -335,6 +335,16 @@ and
 \fBATTRS\fR.
 .RE
 .PP
+\fB$driver\fR, \fB%d\fR
+.RS 4
+The driver name of the device matched while searching the devpath upwards for
+\fBSUBSYSTEMS\fR,
+\fBKERNELS\fR,
+\fBDRIVERS\fR
+and
+\fBATTRS\fR.
+.RE
+.PP
 \fB$attr{\fR\fB\fIfile\fR\fR\fB}\fR, \fB%s{\fR\fB\fIfile\fR\fR\fB}\fR
 .RS 4
 The value of a sysfs attribute found at the device, where all keys of the rule have matched. If the matching device does not have such an attribute, all devices along the chain of parents are searched for a matching attribute. If the attribute is a symlink, the last element of the symlink target is returned as the value.
diff --git a/udev.xml b/udev.xml
index 520c718c7..b43abb779 100644
--- a/udev.xml
+++ b/udev.xml
@@ -487,6 +487,15 @@
               </listitem>
             </varlistentry>
 
+            <varlistentry>
+              <term><option>$driver</option>, <option>%d</option></term>
+              <listitem>
+                <para>The driver name of the device matched while searching the devpath upwards for
+                  <option>SUBSYSTEMS</option>, <option>KERNELS</option>, <option>DRIVERS</option> and <option>ATTRS</option>.
+                </para>
+              </listitem>
+            </varlistentry>
+
             <varlistentry>
               <term><option>$attr{<replaceable>file</replaceable>}</option>, <option>%s{<replaceable>file</replaceable>}</option></term>
               <listitem>
diff --git a/udev_rules.c b/udev_rules.c
index daf3d7fff..3674a27d6 100644
--- a/udev_rules.c
+++ b/udev_rules.c
@@ -597,6 +597,7 @@ void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize)
 		SUBST_KERNEL,
 		SUBST_KERNEL_NUMBER,
 		SUBST_ID,
+		SUBST_DRIVER,
 		SUBST_MAJOR,
 		SUBST_MINOR,
 		SUBST_RESULT,
@@ -616,6 +617,7 @@ void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize)
 		{ .name = "number",	.fmt = 'n',	.type = SUBST_KERNEL_NUMBER },
 		{ .name = "kernel",	.fmt = 'k',	.type = SUBST_KERNEL },
 		{ .name = "id",		.fmt = 'b',	.type = SUBST_ID },
+		{ .name = "driver",	.fmt = 'd',	.type = SUBST_DRIVER },
 		{ .name = "major",	.fmt = 'M',	.type = SUBST_MAJOR },
 		{ .name = "minor",	.fmt = 'm',	.type = SUBST_MINOR },
 		{ .name = "result",	.fmt = 'c',	.type = SUBST_RESULT },
@@ -707,6 +709,12 @@ found:
 				dbg("substitute id '%s'", udev->dev_parent->kernel);
 			}
 			break;
+		case SUBST_DRIVER:
+			if (udev->dev_parent != NULL) {
+				strlcat(string, udev->dev_parent->driver, maxsize);
+				dbg("substitute driver '%s'", udev->dev_parent->driver);
+			}
+			break;
 		case SUBST_MAJOR:
 			sprintf(temp2, "%d", major(udev->devt));
 			strlcat(string, temp2, maxsize);