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authorRob Landley <rob@landley.net>2008-05-12 00:52:27 -0500
committerRob Landley <rob@landley.net>2008-05-12 00:52:27 -0500
commit988abb33a5c9d8023a8e1bd5535a75a16e5d9e46 (patch)
treee79fe82472c84fe3e6675650e49770c8c0e23733 /toys/mdev.c
parente156d44eb2e9954d37ed0dfa326f263c3ed4c3d7 (diff)
downloadtoybox-988abb33a5c9d8023a8e1bd5535a75a16e5d9e46.tar.gz
Update mdev to work around the newest sysfs api breakage in the 2.6.25 kernel.
(Yeah, I know sysfs hasn't actually got an API, but I like to pretend...)
Diffstat (limited to 'toys/mdev.c')
-rw-r--r--toys/mdev.c69
1 files changed, 31 insertions, 38 deletions
diff --git a/toys/mdev.c b/toys/mdev.c
index 6e69a770..63c50823 100644
--- a/toys/mdev.c
+++ b/toys/mdev.c
@@ -2,7 +2,7 @@
*
* mdev - Mini udev for busybox
*
- * Copyright 2005, 2007 Rob Landley <rob@landley.net>
+ * Copyright 2005, 2008 Rob Landley <rob@landley.net>
* Copyright 2005 Frank Sorenson <frank@tuxrocks.com>
*
* Not in SUSv3.
@@ -11,7 +11,7 @@ USE_MDEV(NEWTOY(mdev, "s", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_UMASK))
config MDEV
bool "mdev"
- default n
+ default y
help
usage: mdev [-s]
@@ -21,7 +21,7 @@ config MDEV
config MDEV_CONF
bool "Configuration file for mdev"
- default n
+ default y
depends on MDEV
help
The mdev config file (/etc/mdev.conf) contains lines that look like:
@@ -47,8 +47,7 @@ static void make_device(char *path)
// Try to read major/minor string
- temp = path+strlen(path);
- strcpy(temp, "/dev");
+ temp = strrchr(path, '/');
fd = open(path, O_RDONLY);
*temp=0;
temp++;
@@ -172,49 +171,43 @@ found_device:
if (CFG_MDEV_CONF) chown(temp, uid, gid);
}
-// Recursive search of /sys/block or /sys/class. path must be a writeable
-// buffer of size PATH_MAX containing the directory string to start at.
-
-static void find_dev(char *path)
+static int callback(char *path, struct dirtree *node)
{
- DIR *dir;
- int len=strlen(path);
-
- if (!(dir = opendir(path)))
- perror_exit("No %s",path);
-
- for (;;) {
- struct dirent *entry = readdir(dir);
-
- if (!entry) break;
-
- // Skip "." and ".." (also skips hidden files, which is ok)
-
- if (entry->d_name[0]=='.') continue;
-
- if (entry->d_type == DT_DIR) {
- snprintf(path+len, sizeof(toybuf)-len, "/%s", entry->d_name);
- find_dev(path);
- path[len] = 0;
- }
-
- // If there's a dev entry, mknod it
-
- if (strcmp(entry->d_name, "dev")) make_device(path);
+ // Entries in /sys/class/block aren't char devices, so skip 'em. (We'll
+ // get block devices out of /sys/block.)
+ if(!strcmp(node->name, "block")) return 1;
+
+ // Does this directory have a "dev" entry in it?
+ if (S_ISDIR(node->st.st_mode) || S_ISLNK(node->st.st_mode)) {
+ char *dest = path+strlen(path);
+ strcpy(dest, "/dev");
+ if (!access(path, R_OK)) make_device(path);
+ *dest = 0;
}
- closedir(dir);
+ // Circa 2.6.25 the entries more than 2 deep are all either redundant
+ // (mouse#, event#) or unnamed (every usb_* entry is called "device").
+ return node->depth>1;
}
void mdev_main(void)
{
+ // Handle -s
+
if (toys.optflags) {
- strcpy(toybuf, "/sys/block");
- find_dev(toybuf);
+ xchdir("/sys/class");
strcpy(toybuf, "/sys/class");
- find_dev(toybuf);
- return;
+ dirtree_read(toybuf, NULL, callback);
+ strcpy(toybuf+5, "block");
+ dirtree_read(toybuf, NULL, callback);
}
+// if (toys.optflags) {
+// strcpy(toybuf, "/sys/block");
+// find_dev(toybuf);
+// strcpy(toybuf, "/sys/class");
+// find_dev(toybuf);
+// return;
+// }
// hotplug support goes here
}