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move udev_rules_apply_format() to udev-event.c

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This commit is contained in:
Kay Sievers 2008-10-18 19:19:56 +02:00
parent 2d73813ebc
commit f1128767cb
4 changed files with 460 additions and 490 deletions
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433
udev/udev-event.c
View File

@ -57,7 +57,432 @@ void udev_event_unref(struct udev_event *event)
free(event);
}
static void kernel_log(struct ifreq ifr)
/* extract possible {attr} and move str behind it */
static char *get_format_attribute(struct udev *udev, char **str)
{
char *pos;
char *attr = NULL;
if (*str[0] == '{') {
pos = strchr(*str, '}');
if (pos == NULL) {
err(udev, "missing closing brace for format\n");
return NULL;
}
pos[0] = '\0';
attr = *str+1;
*str = pos+1;
dbg(udev, "attribute='%s', str='%s'\n", attr, *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;
}
/* handle "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */
int udev_event_apply_subsys_kernel(struct udev_event *udev_event, const char *string,
char *result, size_t maxsize, int read_value)
{
char temp[UTIL_PATH_SIZE];
char *subsys;
char *sysname;
char *attr;
struct udev_device *dev;
if (string == NULL)
string = result;
if (string[0] != '[')
return -1;
util_strlcpy(temp, string, sizeof(temp));
subsys = &temp[1];
sysname = strchr(subsys, '/');
if (sysname == NULL)
return -1;
sysname[0] = '\0';
sysname = &sysname[1];
attr = strchr(sysname, ']');
if (attr == NULL)
return -1;
attr[0] = '\0';
attr = &attr[1];
if (attr[0] == '/')
attr = &attr[1];
if (attr[0] == '\0')
attr = NULL;
if (read_value && attr == NULL)
return -1;
dev = udev_device_new_from_subsystem_sysname(udev_event->udev, subsys, sysname);
if (dev == NULL)
return -1;
if (read_value) {
const char *val;
val = udev_device_get_attr_value(dev, attr);
if (val != NULL)
util_strlcpy(result, val, maxsize);
else
result[0] = '\0';
info(udev_event->udev, "value '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
} else {
util_strlcpy(result, udev_device_get_syspath(dev), maxsize);
if (attr != NULL) {
util_strlcat(result, "/", maxsize);
util_strlcat(result, attr, maxsize);
}
info(udev_event->udev, "path '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
}
udev_device_unref(dev);
return 0;
}
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 {
SUBST_UNKNOWN,
SUBST_DEVPATH,
SUBST_KERNEL,
SUBST_KERNEL_NUMBER,
SUBST_ID,
SUBST_DRIVER,
SUBST_MAJOR,
SUBST_MINOR,
SUBST_RESULT,
SUBST_ATTR,
SUBST_PARENT,
SUBST_TEMP_NODE,
SUBST_NAME,
SUBST_LINKS,
SUBST_ROOT,
SUBST_SYS,
SUBST_ENV,
};
static const struct subst_map {
char *name;
char fmt;
enum subst_type type;
} map[] = {
{ .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
{ .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
{ .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL },
{ .name = "id", .fmt = 'b', .type = SUBST_ID },
{ .name = "driver", .fmt = 'd', .type = SUBST_DRIVER },
{ .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
{ .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
{ .name = "result", .fmt = 'c', .type = SUBST_RESULT },
{ .name = "attr", .fmt = 's', .type = SUBST_ATTR },
{ .name = "sysfs", .fmt = 's', .type = SUBST_ATTR },
{ .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
{ .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
{ .name = "name", .fmt = 'D', .type = SUBST_NAME },
{ .name = "links", .fmt = 'L', .type = SUBST_LINKS },
{ .name = "root", .fmt = 'r', .type = SUBST_ROOT },
{ .name = "sys", .fmt = 'S', .type = SUBST_SYS },
{ .name = "env", .fmt = 'E', .type = SUBST_ENV },
{ NULL, '\0', 0 }
};
enum subst_type type;
const struct subst_map *subst;
head = string;
while (1) {
len = -1;
while (head[0] != '\0') {
if (head[0] == '$') {
/* substitute named variable */
if (head[1] == '\0')
break;
if (head[1] == '$') {
util_strlcpy(temp, head+2, sizeof(temp));
util_strlcpy(head+1, temp, maxsize);
head++;
continue;
}
head[0] = '\0';
for (subst = map; subst->name; subst++) {
if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) {
type = subst->type;
tail = head + strlen(subst->name)+1;
dbg(event->udev, "will substitute format name '%s'\n", subst->name);
goto found;
}
}
head[0] = '$';
err(event->udev, "unknown format variable '%s'\n", head);
} else if (head[0] == '%') {
/* substitute format char */
if (head[1] == '\0')
break;
if (head[1] == '%') {
util_strlcpy(temp, head+2, sizeof(temp));
util_strlcpy(head+1, temp, maxsize);
head++;
continue;
}
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;
tail++;
dbg(event->udev, "will substitute format char '%c'\n", subst->fmt);
goto found;
}
}
head[0] = '%';
err(event->udev, "unknown format char '%c'\n", tail[0]);
}
head++;
}
break;
found:
attr = get_format_attribute(event->udev, &tail);
util_strlcpy(temp, tail, sizeof(temp));
dbg(event->udev, "format=%i, string='%s', tail='%s'\n", type ,string, tail);
switch (type) {
case SUBST_DEVPATH:
util_strlcat(string, udev_device_get_devpath(dev), maxsize);
dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev));
break;
case SUBST_KERNEL:
util_strlcat(string, udev_device_get_sysname(dev), maxsize);
dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev));
break;
case SUBST_KERNEL_NUMBER:
if (udev_device_get_sysnum(dev) == NULL)
break;
util_strlcat(string, udev_device_get_sysnum(dev), maxsize);
dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev));
break;
case SUBST_ID:
if (event->dev_parent != NULL) {
util_strlcat(string, udev_device_get_sysname(event->dev_parent), maxsize);
dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent));
}
break;
case SUBST_DRIVER:
if (event->dev_parent != NULL) {
const char *driver = udev_device_get_driver(event->dev_parent);
if (driver == NULL)
break;
util_strlcat(string, driver, maxsize);
dbg(event->udev, "substitute driver '%s'\n", driver);
}
break;
case SUBST_MAJOR:
sprintf(temp2, "%d", major(udev_device_get_devnum(dev)));
util_strlcat(string, temp2, maxsize);
dbg(event->udev, "substitute major number '%s'\n", temp2);
break;
case SUBST_MINOR:
sprintf(temp2, "%d", minor(udev_device_get_devnum(dev)));
util_strlcat(string, temp2, maxsize);
dbg(event->udev, "substitute minor number '%s'\n", temp2);
break;
case SUBST_RESULT:
if (event->program_result[0] == '\0')
break;
/* get part part of the result string */
i = 0;
if (attr != NULL)
i = strtoul(attr, &rest, 10);
if (i > 0) {
dbg(event->udev, "request part #%d of result string\n", i);
cpos = event->program_result;
while (--i) {
while (cpos[0] != '\0' && !isspace(cpos[0]))
cpos++;
while (isspace(cpos[0]))
cpos++;
}
if (i > 0) {
err(event->udev, "requested part of result string not found\n");
break;
}
util_strlcpy(temp2, cpos, sizeof(temp2));
/* %{2+}c copies the whole string from the second part on */
if (rest[0] != '+') {
cpos = strchr(temp2, ' ');
if (cpos)
cpos[0] = '\0';
}
util_strlcat(string, temp2, maxsize);
dbg(event->udev, "substitute part of result string '%s'\n", temp2);
} else {
util_strlcat(string, event->program_result, maxsize);
dbg(event->udev, "substitute result string '%s'\n", event->program_result);
}
break;
case SUBST_ATTR:
if (attr == NULL)
err(event->udev, "missing file parameter for attr\n");
else {
char value[UTIL_NAME_SIZE] = "";
size_t size;
udev_event_apply_subsys_kernel(event, attr, value, sizeof(value), 1);
/* try the current device, other matches may have selected */
if (value[0] == '\0' && event->dev_parent != NULL && event->dev_parent != event->dev) {
const char *val;
val = udev_device_get_attr_value(event->dev_parent, attr);
if (val != NULL)
util_strlcpy(value, val, sizeof(value));
}
/* look at all devices along the chain of parents */
if (value[0] == '\0') {
struct udev_device *dev_parent = dev;
const char *val;
do {
dbg(event->udev, "looking at '%s'\n", udev_device_get_syspath(dev_parent));
val = udev_device_get_attr_value(dev_parent, attr);
if (val != NULL) {
util_strlcpy(value, val, sizeof(value));
break;
}
dev_parent = udev_device_get_parent(dev_parent);
} while (dev_parent != NULL);
}
if (value[0]=='\0')
break;
/* strip trailing whitespace, and replace unwanted characters */
size = strlen(value);
while (size > 0 && isspace(value[--size]))
value[size] = '\0';
count = util_replace_chars(value, ALLOWED_CHARS_INPUT);
if (count > 0)
info(event->udev, "%i character(s) replaced\n" , count);
util_strlcat(string, value, maxsize);
dbg(event->udev, "substitute sysfs value '%s'\n", value);
}
break;
case SUBST_PARENT:
{
struct udev_device *dev_parent;
const char *devnode;
dev_parent = udev_device_get_parent(event->dev);
if (dev_parent == NULL)
break;
devnode = udev_device_get_devnode(dev_parent);
if (devnode != NULL) {
size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
util_strlcat(string, &devnode[devlen], maxsize);
dbg(event->udev, "found parent '%s', got node name '%s'\n",
udev_device_get_syspath(dev_parent), &devnode[devlen]);
}
}
break;
case SUBST_TEMP_NODE:
if (event->tmp_node[0] == '\0' && major(udev_device_get_devnum(dev)) > 0) {
dbg(event->udev, "create temporary device node for callout\n");
snprintf(event->tmp_node, sizeof(event->tmp_node), "%s/.tmp-%u-%u",
udev_get_dev_path(event->udev),
major(udev_device_get_devnum(dev)), minor(udev_device_get_devnum(dev)));
udev_node_mknod(dev, event->tmp_node, makedev(0,0), 0600, 0, 0);
}
util_strlcat(string, event->tmp_node, maxsize);
dbg(event->udev, "substitute temporary device node name '%s'\n", event->tmp_node);
break;
case SUBST_NAME:
if (event->name != NULL) {
util_strlcat(string, event->name, maxsize);
dbg(event->udev, "substitute name '%s'\n", event->name);
} else {
util_strlcat(string, udev_device_get_sysname(dev), maxsize);
dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev));
}
break;
case SUBST_LINKS:
{
struct udev_list_entry *list_entry;
list_entry = udev_device_get_properties_list_entry(dev);
util_strlcpy(string, udev_list_entry_get_name(list_entry), maxsize);
udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
util_strlcat(string, " ", maxsize);
util_strlcat(string, udev_list_entry_get_name(list_entry), maxsize);
}
}
break;
case SUBST_ROOT:
util_strlcat(string, udev_get_dev_path(event->udev), maxsize);
dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev));
break;
case SUBST_SYS:
util_strlcat(string, udev_get_sys_path(event->udev), maxsize);
dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev));
break;
case SUBST_ENV:
if (attr == NULL) {
dbg(event->udev, "missing attribute\n");
break;
} else {
struct udev_list_entry *list_entry;
const char *value;
list_entry = udev_device_get_properties_list_entry(event->dev);
list_entry = udev_list_entry_get_by_name(list_entry, attr);
if (list_entry == NULL)
break;
value = udev_list_entry_get_value(list_entry);
dbg(event->udev, "substitute env '%s=%s'\n", attr, value);
util_strlcat(string, value, maxsize);
break;
}
default:
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);
}
}
static void rename_netif_kernel_log(struct ifreq ifr)
{
int klog;
FILE *f;
@ -100,7 +525,7 @@ static int rename_netif(struct udev_event *event)
util_strlcpy(ifr.ifr_newname, event->name, IFNAMSIZ);
err = ioctl(sk, SIOCSIFNAME, &ifr);
if (err == 0)
kernel_log(ifr);
rename_netif_kernel_log(ifr);
else {
int loop;
@ -128,7 +553,7 @@ static int rename_netif(struct udev_event *event)
while (loop--) {
err = ioctl(sk, SIOCSIFNAME, &ifr);
if (err == 0) {
kernel_log(ifr);
rename_netif_kernel_log(ifr);
break;
}
@ -305,7 +730,7 @@ int udev_event_execute_run(struct udev_event *event)
char **envp;
util_strlcpy(program, cmd, sizeof(program));
udev_rules_apply_format(event, program, sizeof(program));
udev_event_apply_format(event, program, sizeof(program));
envp = udev_device_get_properties_envp(event->dev);
if (run_program(event->udev, program, envp, NULL, 0, NULL) != 0) {
if (!udev_list_entry_get_flag(list_entry))

493
udev/udev-rules.c
View File

@ -190,45 +190,6 @@ next:
return current;
}
/* extract possible {attr} and move str behind it */
static char *get_format_attribute(struct udev *udev, char **str)
{
char *pos;
char *attr = NULL;
if (*str[0] == '{') {
pos = strchr(*str, '}');
if (pos == NULL) {
err(udev, "missing closing brace for format\n");
return NULL;
}
pos[0] = '\0';
attr = *str+1;
*str = pos+1;
dbg(udev, "attribute='%s', str='%s'\n", attr, *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;
}
static int import_property_from_string(struct udev_device *dev, char *line)
{
struct udev *udev = udev_device_get_udev(dev);
@ -412,36 +373,6 @@ static int wait_for_file(struct udev_event *event, const char *file, int timeout
return -1;
}
/* handle "[$SUBSYSTEM/$KERNEL]<attribute>" lookup */
static int split_subsys_sysname(struct udev *udev, char *attrstr, char **subsys, char **sysname, char **attr)
{
char *pos;
if (attrstr[0] != '[')
return -1;
*subsys = &attrstr[1];
pos = strchr(*subsys, ']');
if (pos == NULL)
return -1;
pos[0] = '\0';
pos = &pos[1];
if (pos[0] == '/')
pos = &pos[1];
if (pos[0] != '\0')
*attr = pos;
else
*attr = NULL;
pos = strchr(*subsys, '/');
if (pos == NULL)
return -1;
pos[0] = '\0';
*sysname = &pos[1];
return 0;
}
static int attr_subst_subdir(char *attr, size_t len)
{
char *pos;
@ -480,345 +411,6 @@ static int attr_subst_subdir(char *attr, size_t len)
return found;
}
void udev_rules_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 {
SUBST_UNKNOWN,
SUBST_DEVPATH,
SUBST_KERNEL,
SUBST_KERNEL_NUMBER,
SUBST_ID,
SUBST_DRIVER,
SUBST_MAJOR,
SUBST_MINOR,
SUBST_RESULT,
SUBST_ATTR,
SUBST_PARENT,
SUBST_TEMP_NODE,
SUBST_NAME,
SUBST_LINKS,
SUBST_ROOT,
SUBST_SYS,
SUBST_ENV,
};
static const struct subst_map {
char *name;
char fmt;
enum subst_type type;
} map[] = {
{ .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
{ .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
{ .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL },
{ .name = "id", .fmt = 'b', .type = SUBST_ID },
{ .name = "driver", .fmt = 'd', .type = SUBST_DRIVER },
{ .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
{ .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
{ .name = "result", .fmt = 'c', .type = SUBST_RESULT },
{ .name = "attr", .fmt = 's', .type = SUBST_ATTR },
{ .name = "sysfs", .fmt = 's', .type = SUBST_ATTR },
{ .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
{ .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
{ .name = "name", .fmt = 'D', .type = SUBST_NAME },
{ .name = "links", .fmt = 'L', .type = SUBST_LINKS },
{ .name = "root", .fmt = 'r', .type = SUBST_ROOT },
{ .name = "sys", .fmt = 'S', .type = SUBST_SYS },
{ .name = "env", .fmt = 'E', .type = SUBST_ENV },
{ NULL, '\0', 0 }
};
enum subst_type type;
const struct subst_map *subst;
head = string;
while (1) {
len = -1;
while (head[0] != '\0') {
if (head[0] == '$') {
/* substitute named variable */
if (head[1] == '\0')
break;
if (head[1] == '$') {
util_strlcpy(temp, head+2, sizeof(temp));
util_strlcpy(head+1, temp, maxsize);
head++;
continue;
}
head[0] = '\0';
for (subst = map; subst->name; subst++) {
if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) {
type = subst->type;
tail = head + strlen(subst->name)+1;
dbg(event->udev, "will substitute format name '%s'\n", subst->name);
goto found;
}
}
head[0] = '$';
err(event->udev, "unknown format variable '%s'\n", head);
} else if (head[0] == '%') {
/* substitute format char */
if (head[1] == '\0')
break;
if (head[1] == '%') {
util_strlcpy(temp, head+2, sizeof(temp));
util_strlcpy(head+1, temp, maxsize);
head++;
continue;
}
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;
tail++;
dbg(event->udev, "will substitute format char '%c'\n", subst->fmt);
goto found;
}
}
head[0] = '%';
err(event->udev, "unknown format char '%c'\n", tail[0]);
}
head++;
}
break;
found:
attr = get_format_attribute(event->udev, &tail);
util_strlcpy(temp, tail, sizeof(temp));
dbg(event->udev, "format=%i, string='%s', tail='%s'\n", type ,string, tail);
switch (type) {
case SUBST_DEVPATH:
util_strlcat(string, udev_device_get_devpath(dev), maxsize);
dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev));
break;
case SUBST_KERNEL:
util_strlcat(string, udev_device_get_sysname(dev), maxsize);
dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev));
break;
case SUBST_KERNEL_NUMBER:
if (udev_device_get_sysnum(dev) == NULL)
break;
util_strlcat(string, udev_device_get_sysnum(dev), maxsize);
dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev));
break;
case SUBST_ID:
if (event->dev_parent != NULL) {
util_strlcat(string, udev_device_get_sysname(event->dev_parent), maxsize);
dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent));
}
break;
case SUBST_DRIVER:
if (event->dev_parent != NULL) {
const char *driver = udev_device_get_driver(event->dev_parent);
if (driver == NULL)
break;
util_strlcat(string, driver, maxsize);
dbg(event->udev, "substitute driver '%s'\n", driver);
}
break;
case SUBST_MAJOR:
sprintf(temp2, "%d", major(udev_device_get_devnum(dev)));
util_strlcat(string, temp2, maxsize);
dbg(event->udev, "substitute major number '%s'\n", temp2);
break;
case SUBST_MINOR:
sprintf(temp2, "%d", minor(udev_device_get_devnum(dev)));
util_strlcat(string, temp2, maxsize);
dbg(event->udev, "substitute minor number '%s'\n", temp2);
break;
case SUBST_RESULT:
if (event->program_result[0] == '\0')
break;
/* get part part of the result string */
i = 0;
if (attr != NULL)
i = strtoul(attr, &rest, 10);
if (i > 0) {
dbg(event->udev, "request part #%d of result string\n", i);
cpos = event->program_result;
while (--i) {
while (cpos[0] != '\0' && !isspace(cpos[0]))
cpos++;
while (isspace(cpos[0]))
cpos++;
}
if (i > 0) {
err(event->udev, "requested part of result string not found\n");
break;
}
util_strlcpy(temp2, cpos, sizeof(temp2));
/* %{2+}c copies the whole string from the second part on */
if (rest[0] != '+') {
cpos = strchr(temp2, ' ');
if (cpos)
cpos[0] = '\0';
}
util_strlcat(string, temp2, maxsize);
dbg(event->udev, "substitute part of result string '%s'\n", temp2);
} else {
util_strlcat(string, event->program_result, maxsize);
dbg(event->udev, "substitute result string '%s'\n", event->program_result);
}
break;
case SUBST_ATTR:
if (attr == NULL)
err(event->udev, "missing file parameter for attr\n");
else {
char *subsys;
char *sysname;
char *attrib;
char value[UTIL_NAME_SIZE] = "";
size_t size;
if (split_subsys_sysname(event->udev, attr, &subsys, &sysname, &attrib) == 0) {
struct udev_device *d;
const char *val;
if (attrib == NULL)
break;
d = udev_device_new_from_subsystem_sysname(event->udev, subsys, sysname);
if (d == NULL)
break;
val = udev_device_get_attr_value(d, attrib);
if (val != NULL)
util_strlcpy(value, val, sizeof(value));
udev_device_unref(d);
}
/* try the current device, other matches may have selected */
if (value[0]=='\0' && event->dev_parent != NULL && event->dev_parent != event->dev) {
const char *val;
val = udev_device_get_attr_value(event->dev_parent, attr);
if (val != NULL)
util_strlcpy(value, val, sizeof(value));
}
/* look at all devices along the chain of parents */
if (value[0]=='\0') {
struct udev_device *dev_parent = dev;
const char *val;
do {
dbg(event->udev, "looking at '%s'\n", udev_device_get_syspath(dev_parent));
val = udev_device_get_attr_value(dev_parent, attr);
if (val != NULL) {
util_strlcpy(value, val, sizeof(value));
break;
}
dev_parent = udev_device_get_parent(dev_parent);
} while (dev_parent != NULL);
}
if (value[0]=='\0')
break;
/* strip trailing whitespace, and replace unwanted characters */
size = strlen(value);
while (size > 0 && isspace(value[--size]))
value[size] = '\0';
count = util_replace_chars(value, ALLOWED_CHARS_INPUT);
if (count > 0)
info(event->udev, "%i character(s) replaced\n" , count);
util_strlcat(string, value, maxsize);
dbg(event->udev, "substitute sysfs value '%s'\n", value);
}
break;
case SUBST_PARENT:
{
struct udev_device *dev_parent;
const char *devnode;
dev_parent = udev_device_get_parent(event->dev);
if (dev_parent == NULL)
break;
devnode = udev_device_get_devnode(dev_parent);
if (devnode != NULL) {
size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
util_strlcat(string, &devnode[devlen], maxsize);
dbg(event->udev, "found parent '%s', got node name '%s'\n",
udev_device_get_syspath(dev_parent), &devnode[devlen]);
}
}
break;
case SUBST_TEMP_NODE:
if (event->tmp_node[0] == '\0' && major(udev_device_get_devnum(dev)) > 0) {
dbg(event->udev, "create temporary device node for callout\n");
snprintf(event->tmp_node, sizeof(event->tmp_node), "%s/.tmp-%u-%u",
udev_get_dev_path(event->udev),
major(udev_device_get_devnum(dev)), minor(udev_device_get_devnum(dev)));
udev_node_mknod(dev, event->tmp_node, makedev(0,0), 0600, 0, 0);
}
util_strlcat(string, event->tmp_node, maxsize);
dbg(event->udev, "substitute temporary device node name '%s'\n", event->tmp_node);
break;
case SUBST_NAME:
if (event->name != NULL) {
util_strlcat(string, event->name, maxsize);
dbg(event->udev, "substitute name '%s'\n", event->name);
} else {
util_strlcat(string, udev_device_get_sysname(dev), maxsize);
dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev));
}
break;
case SUBST_LINKS:
{
struct udev_list_entry *list_entry;
list_entry = udev_device_get_properties_list_entry(dev);
util_strlcpy(string, udev_list_entry_get_name(list_entry), maxsize);
udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) {
util_strlcat(string, " ", maxsize);
util_strlcat(string, udev_list_entry_get_name(list_entry), maxsize);
}
}
break;
case SUBST_ROOT:
util_strlcat(string, udev_get_dev_path(event->udev), maxsize);
dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev));
break;
case SUBST_SYS:
util_strlcat(string, udev_get_sys_path(event->udev), maxsize);
dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev));
break;
case SUBST_ENV:
if (attr == NULL) {
dbg(event->udev, "missing attribute\n");
break;
} else {
struct udev_list_entry *list_entry;
const char *value;
list_entry = udev_device_get_properties_list_entry(event->dev);
list_entry = udev_list_entry_get_by_name(list_entry, attr);
if (list_entry == NULL)
break;
value = udev_list_entry_get_value(list_entry);
dbg(event->udev, "substitute env '%s=%s'\n", attr, value);
util_strlcat(string, value, maxsize);
break;
}
default:
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);
}
}
static char *key_val(struct udev_rule *rule, struct key *key)
{
return rule->buf + key->val_off;
@ -943,34 +535,20 @@ static int match_rule(struct udev_event *event, struct udev_rule *rule)
if (rule->test.operation == KEY_OP_MATCH ||
rule->test.operation == KEY_OP_NOMATCH) {
char filename[UTIL_PATH_SIZE];
char *subsys;
char *sysname;
char *attrib;
struct stat statbuf;
int match;
util_strlcpy(filename, key_val(rule, &rule->test), sizeof(filename));
udev_rules_apply_format(event, filename, sizeof(filename));
udev_event_apply_format(event, filename, sizeof(filename));
if (udev_event_apply_subsys_kernel(event, NULL, filename, sizeof(filename), 0) != 0)
if (filename[0] != '/') {
char tmp[UTIL_PATH_SIZE];
if (split_subsys_sysname(event->udev, filename, &subsys, &sysname, &attrib) == 0) {
struct udev_device *d;
d = udev_device_new_from_subsystem_sysname(event->udev, subsys, sysname);
if (d != NULL) {
util_strlcpy(filename, udev_device_get_syspath(d), sizeof(filename));
if (attrib != NULL) {
util_strlcat(filename, "/", sizeof(filename));
util_strlcat(filename, attrib, sizeof(filename));
}
udev_device_unref(d);
util_strlcpy(tmp, udev_device_get_syspath(dev), sizeof(tmp));
util_strlcat(tmp, "/", sizeof(tmp));
util_strlcat(tmp, filename, sizeof(tmp));
util_strlcpy(filename, tmp, sizeof(filename));
}
} else if (filename[0] != '/') {
char tmp[UTIL_PATH_SIZE];
util_strlcpy(tmp, udev_device_get_syspath(dev), sizeof(tmp));
util_strlcat(tmp, "/", sizeof(tmp));
util_strlcat(tmp, filename, sizeof(tmp));
util_strlcpy(filename, tmp, sizeof(filename));
}
attr_subst_subdir(filename, sizeof(filename));
@ -994,7 +572,7 @@ static int match_rule(struct udev_event *event, struct udev_rule *rule)
int found;
util_strlcpy(filename, key_val(rule, &rule->wait_for), sizeof(filename));
udev_rules_apply_format(event, filename, sizeof(filename));
udev_event_apply_format(event, filename, sizeof(filename));
found = (wait_for_file(event, filename, 10) == 0);
if (!found && (rule->wait_for.operation != KEY_OP_NOMATCH))
goto nomatch;
@ -1009,27 +587,11 @@ static int match_rule(struct udev_event *event, struct udev_rule *rule)
char attr[UTIL_PATH_SIZE];
const char *key_name = key_pair_name(rule, pair);
const char *key_value = key_val(rule, &pair->key);
char *subsys;
char *sysname;
char *attrib;
char value[UTIL_NAME_SIZE] = "";
size_t len;
util_strlcpy(attr, key_name, sizeof(attr));
if (split_subsys_sysname(event->udev, attr, &subsys, &sysname, &attrib) == 0) {
struct udev_device *d;
const char *val;
if (attrib == NULL)
goto nomatch;
d = udev_device_new_from_subsystem_sysname(event->udev, subsys, sysname);
if (d == NULL)
goto nomatch;
val = udev_device_get_attr_value(d, attrib);
if (val != NULL)
util_strlcpy(value, val, sizeof(value));
udev_device_unref(d);
}
udev_event_apply_subsys_kernel(event, attr, value, sizeof(value), 1);
if (value[0]=='\0') {
const char *val;
@ -1126,7 +688,7 @@ try_parent:
char result[UTIL_PATH_SIZE];
util_strlcpy(program, key_val(rule, &rule->program), sizeof(program));
udev_rules_apply_format(event, program, sizeof(program));
udev_event_apply_format(event, program, sizeof(program));
envp = udev_device_get_properties_envp(dev);
if (run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
dbg(event->udev, "PROGRAM is false\n");
@ -1163,7 +725,7 @@ try_parent:
int rc = -1;
util_strlcpy(import, key_val(rule, &rule->import), sizeof(import));
udev_rules_apply_format(event, import, sizeof(import));
udev_event_apply_format(event, import, sizeof(import));
dbg(event->udev, "check for IMPORT import='%s'\n", import);
if (rule->import_type == IMPORT_PROGRAM) {
rc = import_program_into_env(event->dev, import);
@ -1194,7 +756,7 @@ try_parent:
/* make sure we don't write to the same string we possibly read from */
util_strlcpy(temp_value, value, sizeof(temp_value));
udev_rules_apply_format(event, temp_value, sizeof(temp_value));
udev_event_apply_format(event, temp_value, sizeof(temp_value));
if (temp_value[0] != '\0') {
struct udev_list_entry *entry;
@ -1213,27 +775,12 @@ try_parent:
if (pair->key.operation == KEY_OP_ASSIGN) {
const char *key_name = key_pair_name(rule, pair);
char *subsys;
char *sysname;
char *attrib;
char attr[UTIL_PATH_SIZE];
char value[UTIL_NAME_SIZE];
FILE *f;
util_strlcpy(attr, key_name, sizeof(attr));
if (split_subsys_sysname(event->udev, attr, &subsys, &sysname, &attrib) == 0) {
struct udev_device *d;
d = udev_device_new_from_subsystem_sysname(event->udev, subsys, sysname);
if (d != NULL) {
util_strlcpy(attr, udev_device_get_syspath(d), sizeof(attr));
if (attrib != NULL) {
util_strlcat(attr, "/", sizeof(attr));
util_strlcat(attr, attrib, sizeof(attr));
}
udev_device_unref(d);
}
} else {
if (udev_event_apply_subsys_kernel(event, key_name, attr, sizeof(attr), 0) != 0) {
util_strlcpy(attr, udev_device_get_syspath(dev), sizeof(attr));
util_strlcat(attr, "/", sizeof(attr));
util_strlcat(attr, key_name, sizeof(attr));
@ -1242,7 +789,7 @@ try_parent:
attr_subst_subdir(attr, sizeof(attr));
util_strlcpy(value, key_val(rule, &pair->key), sizeof(value));
udev_rules_apply_format(event, value, sizeof(value));
udev_event_apply_format(event, value, sizeof(value));
info(event->udev, "writing '%s' to sysfs file '%s'\n", value, attr);
f = fopen(attr, "w");
if (f != NULL) {
@ -1318,7 +865,7 @@ int udev_rules_get_name(struct udev_rules *rules, struct udev_event *event)
event->mode_final = 1;
char buf[20];
util_strlcpy(buf, key_val(rule, &rule->mode), sizeof(buf));
udev_rules_apply_format(event, buf, sizeof(buf));
udev_event_apply_format(event, buf, sizeof(buf));
event->mode = strtol(buf, NULL, 8);
dbg(event->udev, "applied mode=%#o to '%s'\n",
event->mode, udev_device_get_sysname(dev));
@ -1327,7 +874,7 @@ int udev_rules_get_name(struct udev_rules *rules, struct udev_event *event)
if (rule->owner.operation == KEY_OP_ASSIGN_FINAL)
event->owner_final = 1;
util_strlcpy(event->owner, key_val(rule, &rule->owner), sizeof(event->owner));
udev_rules_apply_format(event, event->owner, sizeof(event->owner));
udev_event_apply_format(event, event->owner, sizeof(event->owner));
dbg(event->udev, "applied owner='%s' to '%s'\n",
event->owner, udev_device_get_sysname(dev));
}
@ -1335,7 +882,7 @@ int udev_rules_get_name(struct udev_rules *rules, struct udev_event *event)
if (rule->group.operation == KEY_OP_ASSIGN_FINAL)
event->group_final = 1;
util_strlcpy(event->group, key_val(rule, &rule->group), sizeof(event->group));
udev_rules_apply_format(event, event->group, sizeof(event->group));
udev_event_apply_format(event, event->group, sizeof(event->group));
dbg(event->udev, "applied group='%s' to '%s'\n",
event->group, udev_device_get_sysname(dev));
}
@ -1359,7 +906,7 @@ int udev_rules_get_name(struct udev_rules *rules, struct udev_event *event)
}
/* allow multiple symlinks separated by spaces */
util_strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp));
udev_rules_apply_format(event, temp, sizeof(temp));
udev_event_apply_format(event, temp, sizeof(temp));
if (rule->string_escape == ESCAPE_UNSET)
count = util_replace_chars(temp, ALLOWED_CHARS_FILE " ");
else if (rule->string_escape == ESCAPE_REPLACE)
@ -1400,7 +947,7 @@ int udev_rules_get_name(struct udev_rules *rules, struct udev_event *event)
name_set = 1;
util_strlcpy(event->name, key_val(rule, &rule->name), sizeof(event->name));
udev_rules_apply_format(event, event->name, sizeof(event->name));
udev_event_apply_format(event, event->name, sizeof(event->name));
if (rule->string_escape == ESCAPE_UNSET ||
rule->string_escape == ESCAPE_REPLACE) {
count = util_replace_chars(event->name, ALLOWED_CHARS_FILE);

22
udev/udev.h
View File

@ -60,7 +60,6 @@ static inline void logging_close(void)
closelog();
}
/* udev-event.c */
struct udev_event {
struct udev *udev;
struct udev_device *dev;
@ -86,18 +85,22 @@ struct udev_event {
int exitstatus;
time_t queue_time;
};
struct udev_rules;
extern struct udev_event *udev_event_new(struct udev_device *dev);
extern void udev_event_unref(struct udev_event *event);
extern int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules);
extern int udev_event_execute_run(struct udev_event *event);
/* udev-rules.c */
struct udev_rules;
extern struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names);
extern void udev_rules_unref(struct udev_rules *rules);
extern int udev_rules_get_name(struct udev_rules *rules, struct udev_event *event);
extern int udev_rules_get_run(struct udev_rules *rules, struct udev_event *event);
extern void udev_rules_apply_format(struct udev_event *event, char *string, size_t maxsize);
/* udev-event.c */
extern struct udev_event *udev_event_new(struct udev_device *dev);
extern void udev_event_unref(struct udev_event *event);
extern int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules);
extern int udev_event_execute_run(struct udev_event *event);
extern void udev_event_apply_format(struct udev_event *event, char *string, size_t maxsize);
extern int udev_event_apply_subsys_kernel(struct udev_event *event, const char *string,
char *result, size_t maxsize, int read_value);
/* udev-node.c */
extern int udev_node_mknod(struct udev_device *dev, const char *file, dev_t devnum, mode_t mode, uid_t uid, gid_t gid);
@ -114,11 +117,6 @@ extern gid_t lookup_group(struct udev *udev, const char *group);
extern int run_program(struct udev *udev, const char *command, char **envp,
char *result, size_t ressize, size_t *reslen);
/* udev_utils_file.c */
extern int file_map(const char *filename, char **buf, size_t *bufsize);
extern void file_unmap(void *buf, size_t bufsize);
extern size_t buf_get_line(const char *buf, size_t buflen, size_t cur);
/* udev-selinux.c */
#ifndef USE_SELINUX
static inline void selinux_init(struct udev *udev) {}

2
udev/udevadm-test.c
View File

@ -133,7 +133,7 @@ int udevadm_test(struct udev *udev, int argc, char *argv[])
char program[UTIL_PATH_SIZE];
util_strlcpy(program, udev_list_entry_get_name(entry), sizeof(program));
udev_rules_apply_format(event, program, sizeof(program));
udev_event_apply_format(event, program, sizeof(program));
info(udev, "run: '%s'\n", program);
}
}