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Diffstat (limited to 'toys')
-rw-r--r--toys/pending/mdev.c33
1 files changed, 17 insertions, 16 deletions
diff --git a/toys/pending/mdev.c b/toys/pending/mdev.c
index 0c496336..a13a53df 100644
--- a/toys/pending/mdev.c
+++ b/toys/pending/mdev.c
@@ -35,7 +35,7 @@ config MDEV_CONF
static void make_device(char *path)
{
char *device_name = NULL, *s, *temp;
- int major, minor, type, len, fd;
+ int major = 0, minor = 0, type, len, fd;
int mode = 0660;
uid_t uid = 0;
gid_t gid = 0;
@@ -46,24 +46,21 @@ static void make_device(char *path)
temp = strrchr(path, '/');
fd = open(path, O_RDONLY);
*temp=0;
- temp = toybuf;
- len = read(fd, temp, 64);
+ len = read(fd, toybuf, 64);
close(fd);
if (len<1) return;
- temp[len] = 0;
+ toybuf[len] = 0;
// Determine device type, major and minor
type = path[5]=='c' ? S_IFCHR : S_IFBLK;
- major = minor = 0;
- sscanf(temp, "%u:%u", &major, &minor);
+ sscanf(toybuf, "%u:%u", &major, &minor);
} else {
// if (!path), do hotplug
if (!(temp = getenv("SUBSYSTEM")))
return;
type = strcmp(temp, "block") ? S_IFCHR : S_IFBLK;
- major = minor = 0;
if (!(temp = getenv("MAJOR")))
return;
sscanf(temp, "%u", &major);
@@ -74,11 +71,15 @@ static void make_device(char *path)
device_name = getenv("DEVNAME");
if (!path)
return;
- temp = toybuf;
}
if (!device_name)
device_name = strrchr(path, '/') + 1;
+ // as in linux/drivers/base/core.c, device_get_devnode()
+ while ((temp = strchr(device_name, '!'))) {
+ *temp = '/';
+ }
+
// If we have a config file, look up permissions for this device
if (CFG_MDEV_CONF) {
@@ -185,22 +186,22 @@ found_device:
}
}
- sprintf(temp, "/dev/%s", device_name);
+ sprintf(toybuf, "/dev/%s", device_name);
- if (getenv("ACTION") && !strcmp(getenv("ACTION"), "remove")) {
- unlink(temp);
+ if ((temp=getenv("ACTION")) && !strcmp(temp, "remove")) {
+ unlink(toybuf);
return;
}
if (strchr(device_name, '/'))
- mkpathat(AT_FDCWD, temp, 0, 2);
- if (mknod(temp, mode | type, makedev(major, minor)) && errno != EEXIST)
- perror_exit("mknod %s failed", temp);
+ mkpathat(AT_FDCWD, toybuf, 0, 2);
+ if (mknod(toybuf, mode | type, makedev(major, minor)) && errno != EEXIST)
+ perror_exit("mknod %s failed", toybuf);
- if (type == S_IFBLK) close(open(temp, O_RDONLY)); // scan for partitions
+ if (type == S_IFBLK) close(open(toybuf, O_RDONLY)); // scan for partitions
- if (CFG_MDEV_CONF) mode=chown(temp, uid, gid);
+ if (CFG_MDEV_CONF) mode=chown(toybuf, uid, gid);
}
static int callback(struct dirtree *node)