From a0ee5a05bb3a9a838c35e07ff7a0bb7bbd2d0c9b Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay.sievers@vrfy.org>
Date: Tue, 19 May 2009 12:56:17 +0200
Subject: [PATCH] remove format char string truncation syntax

---
 test/udev-test.pl | 21 +--------------------
 udev/udev-event.c | 27 ---------------------------
 udev/udev.xml     |  3 ---
 3 files changed, 1 insertion(+), 50 deletions(-)

diff --git a/test/udev-test.pl b/test/udev-test.pl
index 788bbeac2..b5abe620f 100755
--- a/test/udev-test.pl
+++ b/test/udev-test.pl
@@ -281,15 +281,6 @@ EOF
 		exp_name	=> "Major:8:minor:5:kernelnumber:5:id:0:0:0:0" ,
 		rules		=> <<EOF
 SUBSYSTEMS=="scsi", KERNELS=="0:0:0:0", NAME="Major:%M:minor:%m:kernelnumber:%n:id:%b"
-EOF
-	},
-	{
-		desc		=> "test substitution chars (with length limit)",
-		subsys		=> "block",
-		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
-		exp_name	=> "M8-m5-n5-b0:0-xAT" ,
-		rules		=> <<EOF
-SUBSYSTEMS=="scsi", KERNELS=="0:0:0:0", NAME="M%M-m%m-n%n-b%3b-x%2s{vendor}"
 EOF
 	},
 	{
@@ -354,7 +345,7 @@ SUBSYSTEMS=="scsi", PROGRAM=="/bin/echo -n test-%b", RESULT=="test-0:0*", NAME="
 EOF
 	},
 	{
-		desc		=> "program with escaped format char (tricky: callout returns format char!)",
+		desc		=> "program with escaped format char (callout returns format char!)",
 		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "escape-5" ,
@@ -1019,16 +1010,6 @@ EOF
 		exp_target	=> "ttyACM0",
 		rules		=> <<EOF
 KERNEL=="ttyACM[0-9]*", NAME="ttyACM%n", SYMLINK+="%s{dev}"
-EOF
-	},
-	{
-		desc		=> "symlink %Ns{filename} substitution",
-		subsys		=> "tty",
-		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
-		exp_name	=> "166",
-		exp_target	=> "ttyACM0",
-		rules		=> <<EOF
-KERNEL=="ttyACM[0-9]*", NAME="ttyACM%n", SYMLINK+="%3s{dev}"
 EOF
 	},
 	{
diff --git a/udev/udev-event.c b/udev/udev-event.c
index 345fb20e2..03ae35241 100644
--- a/udev/udev-event.c
+++ b/udev/udev-event.c
@@ -77,32 +77,12 @@ static char *get_format_attribute(struct udev *udev, char **str)
 	return attr;
 }
 
-/* extract possible format length and move str behind it*/
-static int get_format_len(struct udev *udev, char **str)
-{
-	int num;
-	char *tail;
-
-	if (isdigit(*str[0])) {
-		num = (int) strtoul(*str, &tail, 10);
-		if (num > 0) {
-			*str = tail;
-			dbg(udev, "format length=%i\n", num);
-			return num;
-		} else {
-			err(udev, "format parsing error '%s'\n", *str);
-		}
-	}
-	return -1;
-}
-
 void udev_event_apply_format(struct udev_event *event, char *string, size_t maxsize)
 {
 	struct udev_device *dev = event->dev;
 	char temp[UTIL_PATH_SIZE];
 	char temp2[UTIL_PATH_SIZE];
 	char *head, *tail, *cpos, *attr, *rest;
-	int len;
 	int i;
 	int count;
 	enum subst_type {
@@ -153,7 +133,6 @@ void udev_event_apply_format(struct udev_event *event, char *string, size_t maxs
 
 	head = string;
 	while (1) {
-		len = -1;
 		while (head[0] != '\0') {
 			if (head[0] == '$') {
 				/* substitute named variable */
@@ -188,7 +167,6 @@ void udev_event_apply_format(struct udev_event *event, char *string, size_t maxs
 				}
 				head[0] = '\0';
 				tail = head+1;
-				len = get_format_len(event->udev, &tail);
 				for (subst = map; subst->name; subst++) {
 					if (tail[0] == subst->fmt) {
 						type = subst->type;
@@ -447,11 +425,6 @@ found:
 			err(event->udev, "unknown substitution type=%i\n", type);
 			break;
 		}
-		/* possibly truncate to format-char specified length */
-		if (len >= 0 && len < (int)strlen(head)) {
-			head[len] = '\0';
-			dbg(event->udev, "truncate to %i chars, subtitution string becomes '%s'\n", len, head);
-		}
 		util_strlcat(string, temp, maxsize);
 	}
 }
diff --git a/udev/udev.xml b/udev/udev.xml
index 084c13bd9..cd4884d3b 100644
--- a/udev/udev.xml
+++ b/udev/udev.xml
@@ -620,9 +620,6 @@
               </listitem>
             </varlistentry>
           </variablelist>
-          <para>The count of characters to be substituted may be limited by specifying
-          the format length value. For example, '%3s{file}' will only
-          insert the first three characters of the sysfs attribute</para>
         </refsect2>
       </refsect1>
 
-- 
2.30.2