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mdev: when found, print major,minor into mdev.log

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2012-05-18 11:39:57 +02:00
parent 516530c932
commit ea57f51819
3 changed files with 26 additions and 12 deletions
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10
examples/mdev.conf
View File

@ -7,8 +7,14 @@
# instead of the default 0:0 660.
#
# Syntax:
# %s %d:%d %s
# devicename_regex user:group mode
# [-]devicename_regex user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
# [-]$ENVVAR=regex user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
# [-]@maj,min[-min2] user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
#
# [-]: do not stop on this match, continue reading mdev.conf
# =: move, >: move and create a symlink
# !: do not create device node
# @|$|*: run@cmd if $ACTION=add, $cmd if $ACTION=remove, *cmd in all cases
null 0:0 666
zero 0:0 666

8
examples/mdev_fat.conf
View File

@ -7,10 +7,14 @@
# instead of the default 0:0 660.
#
# Syntax:
# [-]devicename_regex user:group mode [>|=path] [@|$|*cmd args...]
# [-]devicename_regex user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
# [-]$ENVVAR=regex user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
# [-]@maj,min[-min2] user:group mode [=path]|[>path]|[!] [@|$|*cmd args...]
#
# [-]: do not stop on this match, continue reading mdev.conf
# =: move, >: move and create a symlink
# @|$|*: run $cmd on delete, @cmd on create, *cmd on both
# !: do not create device node
# @|$|*: run cmd if $ACTION=remove, @cmd if $ACTION=add, *cmd in all cases
# support module loading on hotplug
$MODALIAS=.* root:root 660 @modprobe "$MODALIAS"

20
util-linux/mdev.c
View File

@ -471,7 +471,7 @@ static void make_device(char *device_name, char *path, int operation)
int major, minor, type, len;
if (G.verbose)
bb_error_msg("make_device: %s, %s, op:%d", device_name, path, operation);
bb_error_msg("device: %s, %s", device_name, path);
/* Try to read major/minor string. Note that the kernel puts \n after
* the data, so we don't need to worry about null terminating the string
@ -479,7 +479,7 @@ static void make_device(char *device_name, char *path, int operation)
* We also depend on path having writeable space after it.
*/
major = -1;
if (operation != OP_remove) {
if (operation == OP_add) {
char *dev_maj_min = path + strlen(path);
strcpy(dev_maj_min, "/dev");
@ -490,7 +490,10 @@ static void make_device(char *device_name, char *path, int operation)
return;
/* no "dev" file, but we can still run scripts
* based on device name */
} else if (sscanf(++dev_maj_min, "%u:%u", &major, &minor) != 2) {
} else if (sscanf(++dev_maj_min, "%u:%u", &major, &minor) == 2) {
if (G.verbose)
bb_error_msg("maj,min: %u,%u", major, minor);
} else {
major = -1;
}
}
@ -502,7 +505,8 @@ static void make_device(char *device_name, char *path, int operation)
/* http://kernel.org/doc/pending/hotplug.txt says that only
* "/sys/block/..." is for block devices. "/sys/bus" etc is not.
* But since 2.6.25 block devices are also in /sys/class/block.
* We use strstr("/block/") to forestall future surprises. */
* We use strstr("/block/") to forestall future surprises.
*/
type = S_IFCHR;
if (strstr(path, "/block/") || (G.subsystem && strncmp(G.subsystem, "block", 5) == 0))
type = S_IFBLK;
@ -669,12 +673,12 @@ static void make_device(char *device_name, char *path, int operation)
bb_error_msg("mknod: %s (%d,%d) %o", node_name, major, minor, rule->mode | type);
if (mknod(node_name, rule->mode | type, makedev(major, minor)) && errno != EEXIST)
bb_perror_msg("can't create '%s'", node_name);
if (major == G.root_major && minor == G.root_minor)
symlink(node_name, "root");
if (ENABLE_FEATURE_MDEV_CONF) {
chmod(node_name, rule->mode);
chown(node_name, rule->ugid.uid, rule->ugid.gid);
}
if (major == G.root_major && minor == G.root_minor)
symlink(node_name, "root");
if (ENABLE_FEATURE_MDEV_RENAME && alias) {
if (aliaslink == '>') {
//TODO: on devtmpfs, device_name already exists and symlink() fails.
@ -890,13 +894,13 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
* DEVPATH is like "/block/sda" or "/class/input/mice"
*/
action = getenv("ACTION");
op = index_in_strings(keywords, action);
env_devname = getenv("DEVNAME"); /* can be NULL */
env_devpath = getenv("DEVPATH");
G.subsystem = getenv("SUBSYSTEM");
if (!action || !env_devpath /*|| !G.subsystem*/)
bb_show_usage();
fw = getenv("FIRMWARE");
op = index_in_strings(keywords, action);
/* If it exists, does /dev/mdev.seq match $SEQNUM?
* If it does not match, earlier mdev is running
* in parallel, and we need to wait */
@ -927,7 +931,7 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
if (logfd >= 0) {
xmove_fd(logfd, STDERR_FILENO);
G.verbose = 1;
bb_error_msg("pid: %u seq: %s action: %s", getpid(), seq, action);
bb_error_msg("seq: %s action: %s", seq, action);
}
}