chiark / gitweb /
[PATCH] added ability to put format specifiers in the CALLOUT program string.
authorgreg@kroah.com <greg@kroah.com>
Mon, 24 Nov 2003 06:25:13 +0000 (22:25 -0800)
committerGreg KH <gregkh@suse.de>
Wed, 27 Apr 2005 04:13:02 +0000 (21:13 -0700)
namedev.c
test/udev-test.pl
udev-add.c
udev.h

index cf9e926..e640b93 100644 (file)
--- a/namedev.c
+++ b/namedev.c
@@ -487,6 +487,66 @@ static mode_t get_default_mode(struct sysfs_class_device *class_dev)
        return 0666;
 }
 
+static void build_kernel_number(struct sysfs_class_device *class_dev, struct udevice *udev)
+{
+       char *dig;
+
+       /* FIXME, figure out how to handle stuff like sdaj which will not work right now. */
+       dig = class_dev->name + strlen(class_dev->name);
+       while (isdigit(*(dig-1)))
+               dig--;
+       strfieldcpy(udev->kernel_number, dig);
+       dbg("kernel_number = %s", udev->kernel_number);
+}
+
+static void apply_format(struct udevice *udev, unsigned char *string)
+{
+       char name[NAME_SIZE];
+       char *pos;
+
+       while (1) {
+               pos = strchr(string, '%');
+
+               if (pos) {
+                       strfieldcpy(name, pos+2);
+                       *pos = 0x00;
+                       switch (pos[1]) {
+                       case 'b':
+                               if (strlen(udev->bus_id) == 0)
+                                       break;
+                               strcat(string, udev->bus_id);
+                               dbg("substitute bus_id '%s'", udev->bus_id);
+                               break;
+                       case 'n':
+                               if (strlen(udev->kernel_number) == 0)
+                                       break;
+                               strcat(pos, udev->kernel_number);
+                               dbg("substitute kernel number '%s'", udev->kernel_number);
+                               break;
+                       case 'm':
+                               sprintf(pos, "%u", udev->minor);
+                               dbg("substitute minor number '%u'", udev->minor);
+                               break;
+                       case 'M':
+                               sprintf(pos, "%u", udev->major);
+                               dbg("substitute major number '%u'", udev->major);
+                               break;
+                       case 'c':
+                               if (strlen(udev->callout_value) == 0)
+                                       break;
+                               strcat(pos, udev->callout_value);
+                               dbg("substitute callout output '%s'", udev->callout_value);
+                               break;
+                       default:
+                               dbg("unknown substitution type '%%%c'", pos[1]);
+                               break;
+                       }
+                       strcat(string, name);
+               } else
+                       break;
+       }
+}
+
 
 static int exec_callout(struct config_device *dev, char *value, int len)
 {
@@ -577,7 +637,7 @@ static int exec_callout(struct config_device *dev, char *value, int len)
        return retval;
 }
 
-static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev, char *value, int len)
+static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev)
 {
        struct config_device *dev;
        struct list_head *tmp;
@@ -586,9 +646,12 @@ static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev
                dev = list_entry(tmp, struct config_device, node);
                if (dev->type != CALLOUT)
                        continue;
-               if (exec_callout(dev, value, len))
+
+               /* substitute anything that needs to be in the program name */
+               apply_format(udev, dev->exec_program);
+               if (exec_callout(dev, udev->callout_value, NAME_SIZE))
                        continue;
-               if (strncmp_wildcard(value, dev->id, len) != 0)
+               if (strncmp_wildcard(udev->callout_value, dev->id, NAME_SIZE) != 0)
                        continue;
                strfieldcpy(udev->name, dev->name);
                if (dev->mode != 0) {
@@ -808,7 +871,6 @@ static int get_attr(struct sysfs_class_device *class_dev, struct udevice *udev)
        struct sysfs_class_device *class_dev_parent = NULL;
        int retval = 0;
        char *temp = NULL;
-       char value[ID_SIZE];
 
        udev->mode = 0;
 
@@ -846,12 +908,15 @@ static int get_attr(struct sysfs_class_device *class_dev, struct udevice *udev)
        if (sysfs_device) {
                dbg_parse("sysfs_device->path='%s'", sysfs_device->path);
                dbg_parse("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
+               strfieldcpy(udev->bus_id, sysfs_device->bus_id);
        } else {
                dbg_parse("class_dev->name = '%s'", class_dev->name);
        }
 
+       build_kernel_number(class_dev, udev);
+
        /* rules are looked at in priority order */
-       retval = do_callout(class_dev, udev, value, sizeof(value));
+       retval = do_callout(class_dev, udev);
        if (retval == 0)
                goto found;
 
@@ -876,48 +941,7 @@ static int get_attr(struct sysfs_class_device *class_dev, struct udevice *udev)
 
 found:
        /* substitute placeholder in NAME  */
-       while (1) {
-               char *pos = strchr(udev->name, '%');
-               char *dig;
-               char name[NAME_SIZE];
-
-               if (pos) {
-                       strfieldcpy(name, pos+2);
-                       *pos = 0x00;
-                       switch (pos[1]) {
-                       case 'b':
-                               if (!sysfs_device)
-                                       break;
-                               strcat(udev->name, sysfs_device->bus_id);
-                               dbg("substitute bus_id '%s'", sysfs_device->bus_id);
-                               break;
-                       case 'n':
-                               dig = class_dev->name + strlen(class_dev->name);
-                               while (isdigit(*(dig-1)))
-                                       dig--;
-                               strcat(pos, dig);
-                               dbg("substitute kernel number '%s'", dig);
-                               break;
-                       case 'm':
-                               sprintf(pos, "%u", udev->minor);
-                               dbg("substitute minor number '%u'", udev->minor);
-                               break;
-                       case 'M':
-                               sprintf(pos, "%u", udev->major);
-                               dbg("substitute major number '%u'", udev->major);
-                               break;
-                       case 'c':
-                               strcat(pos, value);
-                               dbg("substitute callout output '%s'", value);
-                               break;
-                       default:
-                               dbg("unknown substitution type '%%%c'", pos[1]);
-                               break;
-                       }
-                       strcat(udev->name, name);
-               } else
-                       break;
-       }
+       apply_format(udev, udev->name);
 
 done:
        /* mode was never set above */
index 613aa79..02f8ff6 100644 (file)
@@ -92,6 +92,15 @@ CALLOUT, BUS="scsi", PROGRAM="/bin/echo -n special-device", ID="special-devic",
 CALLOUT, BUS="scsi", PROGRAM="/bin/echo -n special-device", ID="special-*", NAME="%c-%n"
 EOF
        },
+       {
+               desc     => "callout program subtitution",
+               subsys   => "block",
+               devpath  => "block/sda/sda3",
+               expected => "test-0:0:0:0" ,
+               conf     => <<EOF
+CALLOUT, BUS="scsi", PROGRAM="/bin/echo -n test-%b", ID="test-*", NAME="%c"
+EOF
+       },
 );
 
 # set env
index 634a515..068fd46 100644 (file)
@@ -245,6 +245,8 @@ int udev_add_device(char *path, char *subsystem)
        struct udevice dev;
        int retval = -EINVAL;
 
+       memset(&dev, 0x00, sizeof(dev));
+
        /* for now, the block layer is the only place where block devices are */
        if (strcmp(subsystem, "block") == 0)
                dev.type = 'b';
diff --git a/udev.h b/udev.h
index 904948d..6798f13 100644 (file)
--- a/udev.h
+++ b/udev.h
@@ -68,6 +68,12 @@ struct udevice {
        int major;
        int minor;
        mode_t mode;
+
+       /* fields that help us in building strings */
+       unsigned char bus_id[SYSFS_NAME_LEN];
+       unsigned char callout_value[NAME_SIZE];
+       unsigned char kernel_number[NAME_SIZE];
+
 };
 
 #define strfieldcpy(to, from) \