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add $links substitution

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This commit is contained in:
Kay Sievers 2008-04-21 17:43:12 +02:00
parent 953080abd9
commit 927e994219
3 changed files with 38 additions and 5 deletions
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7
udev.7
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@ -378,7 +378,12 @@ The node name of the parent device\.
.PP
\fB$name\fR
.RS 4
The name of the device node\. The value is only set if an earlier rule assigned a value, or during a remove events\.
The current name of the device node\. If not changed by a rule, it is the name of the kernel device\.
.RE
.PP
\fB$links\fR
.RS 4
The current list of symlinks, separated by a space character\. The value is only set if an earlier rule assigned a value, or during a remove events\.
.RE
.PP
\fB$root\fR, \fB%r\fR

12
udev.xml
View File

@ -556,8 +556,16 @@
<varlistentry>
<term><option>$name</option></term>
<listitem>
<para>The name of the device node. The value is only set if an earlier
rule assigned a value, or during a remove events.</para>
<para>The current name of the device node. If not changed by a rule, it is the
name of the kernel device.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>$links</option></term>
<listitem>
<para>The current list of symlinks, separated by a space character. The value is
only set if an earlier rule assigned a value, or during a remove events.</para>
</listitem>
</varlistentry>

24
udev_rules.c
View File

@ -658,6 +658,7 @@ void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize)
SUBST_PARENT,
SUBST_TEMP_NODE,
SUBST_NAME,
SUBST_LINKS,
SUBST_ROOT,
SUBST_SYS,
SUBST_ENV,
@ -680,6 +681,7 @@ void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize)
{ .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
{ .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
{ .name = "name", .fmt = 'D', .type = SUBST_NAME },
{ .name = "links", .fmt = 'L', .type = SUBST_LINKS },
{ .name = "root", .fmt = 'r', .type = SUBST_ROOT },
{ .name = "sys", .fmt = 'S', .type = SUBST_SYS },
{ .name = "env", .fmt = 'E', .type = SUBST_ENV },
@ -899,8 +901,26 @@ found:
dbg("substitute temporary device node name '%s'\n", udev->tmp_node);
break;
case SUBST_NAME:
strlcat(string, udev->name, maxsize);
dbg("substitute udev->name '%s'\n", udev->name);
if (udev->name[0] == '\0') {
strlcat(string, udev->dev->kernel, maxsize);
dbg("substitute udev->kernel '%s'\n", udev->name);
} else {
strlcat(string, udev->name, maxsize);
dbg("substitute udev->name '%s'\n", udev->name);
}
break;
case SUBST_LINKS:
if (!list_empty(&udev->symlink_list)) {
struct name_entry *name_loop;
char symlinks[PATH_SIZE] = "";
list_for_each_entry(name_loop, &udev->symlink_list, node) {
strlcat(symlinks, name_loop->name, sizeof(symlinks));
strlcat(symlinks, " ", sizeof(symlinks));
}
remove_trailing_chars(symlinks, ' ');
strlcat(string, symlinks, maxsize);
}
break;
case SUBST_ROOT:
strlcat(string, udev_root, maxsize);