#include <stddef.h>

#include <stdlib.h>

#include <string.h>

#include <stdio.h>

#include <fcntl.h>

#include <ctype.h>

#include <unistd.h>

#include <errno.h>

#include <dirent.h>

#include <fnmatch.h>

#include "udev.h"

#define PREALLOC_TOKEN 2048

#define PREALLOC_STRBUF 32 * 1024

enum operation_type {

OP_UNSET,

OP_MATCH,

OP_NOMATCH,

OP_MATCH_MAX,

OP_ADD,

OP_ASSIGN,

OP_ASSIGN_FINAL,

};

static const char *operation_str[] = {

[OP_UNSET] = "UNSET",

[OP_MATCH] = "match",

[OP_NOMATCH] = "nomatch",

[OP_MATCH_MAX] = "MATCH_MAX",

[OP_ADD] = "add",

[OP_ASSIGN] = "assign",

[OP_ASSIGN_FINAL] = "assign-final",

};

enum string_glob_type {

GL_UNSET,

GL_PLAIN, /* no special chars */

GL_GLOB, /* shell globs ?,*,[] */

GL_SPLIT, /* multi-value A|B */

GL_SPLIT_GLOB, /* multi-value with glob A*|B* */

GL_SOMETHING, /* commonly used "?*" */

GL_FORMAT,

};

#ifdef DEBUG

static const char *string_glob_str[] = {

[GL_UNSET] = "UNSET",

[GL_PLAIN] = "plain",

[GL_GLOB] = "glob",

[GL_SPLIT] = "split",

[GL_SPLIT_GLOB] = "split-glob",

[GL_SOMETHING] = "split-glob",

[GL_FORMAT] = "format",

};

#endif

enum token_type {

TK_UNSET,

TK_RULE,

TK_M_ACTION, /* val */

TK_M_DEVPATH, /* val */

TK_M_KERNEL, /* val */

TK_M_DEVLINK, /* val */

TK_M_NAME, /* val */

TK_M_ENV, /* val, attr */

TK_M_SUBSYSTEM, /* val */

TK_M_DRIVER, /* val */

TK_M_WAITFOR, /* val */

TK_M_ATTR, /* val, attr */

TK_M_KERNELS, /* val */

TK_M_SUBSYSTEMS, /* val */

TK_M_DRIVERS, /* val */

TK_M_ATTRS, /* val, attr */

TK_M_PARENTS_MAX,

TK_M_TEST, /* val, mode_t */

TK_M_PROGRAM, /* val */

TK_M_IMPORT_FILE, /* val */

TK_M_IMPORT_PROG, /* val */

TK_M_IMPORT_PARENT, /* val */

TK_M_RESULT, /* val */

TK_M_MAX,

TK_A_IGNORE_DEVICE,

TK_A_STRING_ESCAPE_NONE,

TK_A_STRING_ESCAPE_REPLACE,

TK_A_NUM_FAKE_PART, /* int */

TK_A_DEVLINK_PRIO, /* int */

TK_A_OWNER, /* val */

TK_A_GROUP, /* val */

TK_A_MODE, /* val */

TK_A_OWNER_ID, /* uid_t */

TK_A_GROUP_ID, /* gid_t */

TK_A_MODE_ID, /* mode_t */

TK_A_ENV, /* val, attr */

TK_A_NAME, /* val */

TK_A_DEVLINK, /* val */

TK_A_EVENT_TIMEOUT, /* int */

TK_A_IGNORE_REMOVE,

TK_A_ATTR, /* val, attr */

TK_A_RUN, /* val, bool */

TK_A_GOTO, /* size_t */

TK_A_LAST_RULE,

TK_END,

};

static const char *token_str[] = {

[TK_UNSET] = "UNSET",

[TK_RULE] = "RULE",

[TK_M_ACTION] = "M ACTION",

[TK_M_DEVPATH] = "M DEVPATH",

[TK_M_KERNEL] = "M KERNEL",

[TK_M_DEVLINK] = "M DEVLINK",

[TK_M_NAME] = "M NAME",

[TK_M_ENV] = "M ENV",

[TK_M_SUBSYSTEM] = "M SUBSYSTEM",

[TK_M_DRIVER] = "M DRIVER",

[TK_M_WAITFOR] = "M WAITFOR",

[TK_M_ATTR] = "M ATTR",

[TK_M_KERNELS] = "M KERNELS",

[TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",

[TK_M_DRIVERS] = "M DRIVERS",

[TK_M_ATTRS] = "M ATTRS",

[TK_M_PARENTS_MAX] = "M PARENTS_MAX",

[TK_M_TEST] = "M TEST",

[TK_M_PROGRAM] = "M PROGRAM",

[TK_M_IMPORT_FILE] = "M IMPORT_FILE",

[TK_M_IMPORT_PROG] = "M IMPORT_PROG",

[TK_M_IMPORT_PARENT] = "M MPORT_PARENT",

[TK_M_RESULT] = "M RESULT",

[TK_M_MAX] = "M MAX",

[TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",

[TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",

[TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",

[TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",

[TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",

[TK_A_OWNER] = "A OWNER",

[TK_A_GROUP] = "A GROUP",

[TK_A_MODE] = "A MODE",

[TK_A_OWNER_ID] = "A OWNER_ID",

[TK_A_GROUP_ID] = "A GROUP_ID",

[TK_A_MODE_ID] = "A MODE_ID",

[TK_A_ENV] = "A ENV",

[TK_A_NAME] = "A NAME",

[TK_A_DEVLINK] = "A DEVLINK",

[TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",

[TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",

[TK_A_ATTR] = "A ATTR",

[TK_A_RUN] = "A RUN",

[TK_A_GOTO] = "A GOTO",

[TK_A_LAST_RULE] = "A LAST_RULE",

[TK_END] = "END",

};

struct token {

enum token_type type;

union {

struct {

unsigned int next_rule;

unsigned int label_off;

unsigned int filename_off;

} rule;

struct {

unsigned short op;

unsigned short glob;

unsigned int value_off;

union {

unsigned int attr_off;

int ignore_error;

int i;

unsigned int rule_goto;

mode_t mode;

uid_t uid;

gid_t gid;

int num_fake_part;

int devlink_prio;

int event_timeout;

};

} key;

};

};

#define MAX_TK 64

struct rule_tmp {

struct udev_rules *rules;

struct token rule;

struct token token[MAX_TK];

unsigned int token_cur;

};

struct uid_gid {

unsigned int name_off;

union {

uid_t uid;

gid_t gid;

};

};

struct udev_rules {

struct udev *udev;

int resolve_names;

/* every key in the rules file becomes a token */

struct token *tokens;

unsigned int token_cur;

unsigned int token_max;

/* all key strings are copied to a single string buffer */

char *buf;

size_t buf_cur;

size_t buf_max;

unsigned int buf_count;

/* during rule parsing, we cache uid/gid lookup results */

struct uid_gid *uids;

unsigned int uids_cur;

unsigned int uids_max;

struct uid_gid *gids;

unsigned int gids_cur;

unsigned int gids_max;

};

static int add_string(struct udev_rules *rules, const char *str)

{

size_t len = strlen(str)+1;

int off;

/* offset 0 is always '\0' */

if (str[0] == '\0')

return 0;

/* grow buffer if needed */

if (rules->buf_cur + len+1 >= rules->buf_max) {

char *buf;

unsigned int add;

/* double the buffer size */

add = rules->buf_max;

if (add < len * 8)

add = len * 8;

buf = realloc(rules->buf, rules->buf_max + add);

if (buf == NULL)

return -1;

info(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);

rules->buf = buf;

rules->buf_max += add;

}

off = rules->buf_cur;

memcpy(&rules->buf[rules->buf_cur], str, len);

rules->buf_cur += len;

rules->buf_count++;

return off;

}

static int add_token(struct udev_rules *rules, struct token *token)

{

/* grow buffer if needed */

if (rules->token_cur+1 >= rules->token_max) {

struct token *tokens;

unsigned int add;

/* double the buffer size */

add = rules->token_max;

if (add < 8)

add = 8;

tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));

if (tokens == NULL)

return -1;

info(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);

rules->tokens = tokens;

rules->token_max += add;

}

memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));

rules->token_cur++;

return 0;

}

static uid_t add_uid(struct udev_rules *rules, const char *owner)

{

unsigned int i;

uid_t uid;

unsigned int off;

/* lookup, if we know it already */

for (i = 0; i < rules->uids_cur; i++) {

off = rules->uids[i].name_off;

if (strcmp(&rules->buf[off], owner) == 0) {

uid = rules->uids[i].uid;

dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);

return uid;

}

}

uid = util_lookup_user(rules->udev, owner);

/* grow buffer if needed */

if (rules->uids_cur+1 >= rules->uids_max) {

struct uid_gid *uids;

unsigned int add;

/* double the buffer size */

add = rules->uids_max;

if (add < 1)

add = 8;

uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));

if (uids == NULL)

return uid;

info(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);

rules->uids = uids;

rules->uids_max += add;

}

rules->uids[rules->uids_cur].uid = uid;

off = add_string(rules, owner);

if (off <= 0)

return uid;

rules->uids[rules->uids_cur].name_off = off;

rules->uids_cur++;

return uid;

}

static gid_t add_gid(struct udev_rules *rules, const char *group)

{

unsigned int i;

gid_t gid;

unsigned int off;

/* lookup, if we know it already */

for (i = 0; i < rules->gids_cur; i++) {

off = rules->gids[i].name_off;

if (strcmp(&rules->buf[off], group) == 0) {

gid = rules->gids[i].gid;

dbg(rules->udev, "return existing %u for '%s'\n", gid, group);

return gid;

}

}

gid = util_lookup_group(rules->udev, group);

/* grow buffer if needed */

if (rules->gids_cur+1 >= rules->gids_max) {

struct uid_gid *gids;

unsigned int add;

/* double the buffer size */

add = rules->gids_max;

if (add < 1)

add = 8;

gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));

if (gids == NULL)

return gid;

info(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);

rules->gids = gids;

rules->gids_max += add;

}

rules->gids[rules->gids_cur].gid = gid;

off = add_string(rules, group);

if (off <= 0)

return gid;

rules->gids[rules->gids_cur].name_off = off;

rules->gids_cur++;

return gid;

}

static int import_property_from_string(struct udev_device *dev, char *line)

{

struct udev *udev = udev_device_get_udev(dev);

char *key;

char *val;

size_t len;

/* find key */

key = line;

while (isspace(key[0]))

key++;

/* comment or empty line */

if (key[0] == '#' || key[0] == '\0')

return -1;

/* split key/value */

val = strchr(key, '=');

if (val == NULL)

return -1;

val[0] = '\0';

val++;

/* find value */

while (isspace(val[0]))

val++;

/* terminate key */

len = strlen(key);

if (len == 0)

return -1;

while (isspace(key[len-1]))

len--;

key[len] = '\0';

/* terminate value */

len = strlen(val);

if (len == 0)

return -1;

while (isspace(val[len-1]))

len--;

val[len] = '\0';

if (len == 0)

return -1;

/* unquote */

if (val[0] == '"' || val[0] == '\'') {

if (val[len-1] != val[0]) {

info(udev, "inconsistent quoting: '%s', skip\n", line);

return -1;

}

val[len-1] = '\0';

val++;

}

info(udev, "adding '%s'='%s'\n", key, val);

/* handle device, renamed by external tool, returning new path */

if (strcmp(key, "DEVPATH") == 0) {

char syspath[UTIL_PATH_SIZE];

info(udev, "updating devpath from '%s' to '%s'\n",

udev_device_get_devpath(dev), val);

util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));

util_strlcat(syspath, val, sizeof(syspath));

udev_device_set_syspath(dev, syspath);

} else {

struct udev_list_entry *entry;

entry = udev_device_add_property(dev, key, val);

/* store in db */

udev_list_entry_set_flag(entry, 1);

}

return 0;

}

static int import_file_into_properties(struct udev_device *dev, const char *filename)

{

FILE *f;

char line[UTIL_LINE_SIZE];

f = fopen(filename, "r");

if (f == NULL)

return -1;

while (fgets(line, sizeof(line), f) != NULL)

import_property_from_string(dev, line);

fclose(f);

return 0;

}

static int import_program_into_properties(struct udev_device *dev, const char *program)

{

struct udev *udev = udev_device_get_udev(dev);

char **envp;

char result[2048];

size_t reslen;

char *line;

envp = udev_device_get_properties_envp(dev);

if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)

return -1;

line = result;

while (line != NULL) {

char *pos;

pos = strchr(line, '\n');

if (pos != NULL) {

pos[0] = '\0';

pos = &pos[1];

}

import_property_from_string(dev, line);

line = pos;

}

return 0;

}

static int import_parent_into_properties(struct udev_device *dev, const char *filter)

{

struct udev *udev = udev_device_get_udev(dev);

struct udev_device *dev_parent;

struct udev_list_entry *list_entry;

dev_parent = udev_device_get_parent(dev);

if (dev_parent == NULL)

return -1;

dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));

udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {

const char *key = udev_list_entry_get_name(list_entry);

const char *val = udev_list_entry_get_value(list_entry);

if (fnmatch(filter, key, 0) == 0) {

struct udev_list_entry *entry;

dbg(udev, "import key '%s=%s'\n", key, val);

entry = udev_device_add_property(dev, key, val);

/* store in db */

udev_list_entry_set_flag(entry, 1);

}

}

return 0;

}

#define WAIT_LOOP_PER_SECOND 50

static int wait_for_file(struct udev_device *dev, const char *file, int timeout)

{

struct udev *udev = udev_device_get_udev(dev);

char filepath[UTIL_PATH_SIZE];

char devicepath[UTIL_PATH_SIZE] = "";

struct stat stats;

int loop = timeout * WAIT_LOOP_PER_SECOND;

/* a relative path is a device attribute */

if (file[0] != '/') {

util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));

util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));

util_strlcpy(filepath, devicepath, sizeof(filepath));

util_strlcat(filepath, "/", sizeof(filepath));

util_strlcat(filepath, file, sizeof(filepath));

file = filepath;

}

dbg(udev, "will wait %i sec for '%s'\n", timeout, file);

while (--loop) {

/* lookup file */

if (stat(file, &stats) == 0) {

info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);

return 0;

}

/* make sure, the device did not disappear in the meantime */

if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {

info(udev, "device disappeared while waiting for '%s'\n", file);

return -2;

}

info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);

usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);

}

info(udev, "waiting for '%s' failed\n", file);

return -1;

}

static int attr_subst_subdir(char *attr, size_t len)

{

char *pos;

int found = 0;

pos = strstr(attr, "/*/");

if (pos != NULL) {

char str[UTIL_PATH_SIZE];

DIR *dir;

pos[1] = '\0';

util_strlcpy(str, &pos[2], sizeof(str));

dir = opendir(attr);

if (dir != NULL) {

struct dirent *dent;

for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {

struct stat stats;

if (dent->d_name[0] == '.')

continue;

util_strlcat(attr, dent->d_name, len);

util_strlcat(attr, str, len);

if (stat(attr, &stats) == 0) {

found = 1;

break;

}

pos[1] = '\0';

}

closedir(dir);

}

if (!found)

util_strlcat(attr, str, len);

}

return found;

}

static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)

{

char *linepos;

char *temp;

linepos = *line;

if (linepos == NULL && linepos[0] == '\0')

return -1;

/* skip whitespace */

while (isspace(linepos[0]) || linepos[0] == ',')

linepos++;

/* get the key */

if (linepos[0] == '\0')

return -1;

*key = linepos;

while (1) {

linepos++;

if (linepos[0] == '\0')

return -1;

if (isspace(linepos[0]))

break;

if (linepos[0] == '=')

break;

if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))

if (linepos[1] == '=')

break;

}

/* remember end of key */

temp = linepos;

/* skip whitespace after key */

while (isspace(linepos[0]))

linepos++;

if (linepos[0] == '\0')

return -1;

/* get operation type */

if (linepos[0] == '=' && linepos[1] == '=') {

*op = OP_MATCH;

linepos += 2;

} else if (linepos[0] == '!' && linepos[1] == '=') {

*op = OP_NOMATCH;

linepos += 2;

} else if (linepos[0] == '+' && linepos[1] == '=') {

*op = OP_ADD;

linepos += 2;

} else if (linepos[0] == '=') {

*op = OP_ASSIGN;

linepos++;

} else if (linepos[0] == ':' && linepos[1] == '=') {

*op = OP_ASSIGN_FINAL;

linepos += 2;

} else

return -1;

/* terminate key */

temp[0] = '\0';

/* skip whitespace after operator */

while (isspace(linepos[0]))

linepos++;

if (linepos[0] == '\0')

return -1;

/* get the value */

if (linepos[0] == '"')

linepos++;

else

return -1;

*value = linepos;

/* terminate */

temp = strchr(linepos, '"');

if (!temp)

return -1;

temp[0] = '\0';

temp++;

dbg(udev, "%s '%s'-'%s'\n", operation_str[*op], *key, *value);

/* move line to next key */

*line = temp;

return 0;

}

static char *get_key_attribute(struct udev *udev, char *str)

{

char *pos;

char *attr;

attr = strchr(str, '{');

if (attr != NULL) {

attr++;

pos = strchr(attr, '}');

if (pos == NULL) {

err(udev, "missing closing brace for format\n");

return NULL;

}

pos[0] = '\0';

dbg(udev, "attribute='%s'\n", attr);

return attr;

}

return NULL;

}

static int rule_add_token(struct rule_tmp *rule_tmp, enum token_type type,

enum operation_type op,

const char *value, const void *data)

{

struct token *token = &rule_tmp->token[rule_tmp->token_cur];

const char *attr = data;

enum string_glob_type glob;

memset(token, 0x00, sizeof(struct token));

switch (type) {

case TK_M_ACTION:

case TK_M_DEVPATH:

case TK_M_KERNEL:

case TK_M_SUBSYSTEM:

case TK_M_DRIVER:

case TK_M_WAITFOR:

case TK_M_DEVLINK:

case TK_M_NAME:

case TK_M_KERNELS:

case TK_M_SUBSYSTEMS:

case TK_M_DRIVERS:

case TK_M_PROGRAM:

case TK_M_IMPORT_FILE:

case TK_M_IMPORT_PROG:

case TK_M_IMPORT_PARENT:

case TK_M_RESULT:

case TK_A_OWNER:

case TK_A_GROUP:

case TK_A_MODE:

case TK_A_NAME:

case TK_A_DEVLINK:

case TK_A_GOTO:

token->key.value_off = add_string(rule_tmp->rules, value);

break;

case TK_M_ENV:

case TK_M_ATTR:

case TK_M_ATTRS:

case TK_A_ATTR:

case TK_A_ENV:

token->key.value_off = add_string(rule_tmp->rules, value);

token->key.attr_off = add_string(rule_tmp->rules, attr);

break;

case TK_M_TEST:

token->key.value_off = add_string(rule_tmp->rules, value);

if (data != NULL)

token->key.mode = *(mode_t *)data;

break;

case TK_A_IGNORE_DEVICE:

case TK_A_STRING_ESCAPE_NONE:

case TK_A_STRING_ESCAPE_REPLACE:

case TK_A_IGNORE_REMOVE:

case TK_A_LAST_RULE:

break;

case TK_A_RUN:

token->key.value_off = add_string(rule_tmp->rules, value);

token->key.ignore_error = *(int *)data;

break;

case TK_A_NUM_FAKE_PART:

token->key.num_fake_part = *(int *)data;

break;

case TK_A_DEVLINK_PRIO:

token->key.devlink_prio = *(int *)data;

break;

case TK_A_OWNER_ID:

token->key.uid = *(uid_t *)data;

break;

case TK_A_GROUP_ID:

token->key.gid = *(gid_t *)data;

break;

case TK_A_MODE_ID:

token->key.mode = *(mode_t *)data;

break;

case TK_A_EVENT_TIMEOUT:

token->key.event_timeout = *(int *)data;

break;

case TK_RULE:

case TK_M_PARENTS_MAX:

case TK_M_MAX:

case TK_END:

case TK_UNSET:

err(rule_tmp->rules->udev, "wrong type %u\n", type);

return -1;

}

glob = GL_PLAIN;

if (value != NULL) {

if (type < TK_M_MAX) {

/* check if we need to split or call fnmatch() while matching rules */

int has_split;

int has_glob;

has_split = (strchr(value, '|') != NULL);

has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||

strchr(value, '[') != NULL || strchr(value, ']') != NULL);

if (has_split && has_glob) {

glob = GL_SPLIT_GLOB;

} else if (has_split) {

glob = GL_SPLIT;

} else if (has_glob) {

if (strcmp(value, "?*") == 0)

glob = GL_SOMETHING;

else

glob = GL_GLOB;

}

} else {

/* check if we need to substitute format strings for matching rules */

if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)

glob = GL_FORMAT;

}

}

token->type = type;

token->key.op = op;

token->key.glob = glob;

rule_tmp->token_cur++;

if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {

err(rule_tmp->rules->udev, "temporary rule array too small\n");

return -1;

}

return 0;

}

#ifdef DEBUG

static void dump_token(struct udev_rules *rules, struct token *token)

{

enum token_type type = token->type;

enum operation_type op = token->key.op;

enum string_glob_type glob = token->key.glob;

const char *value = &rules->buf[token->key.value_off];

const char *attr = &rules->buf[token->key.attr_off];

switch (type) {

case TK_RULE:

{

const char *tks_ptr = (char *)rules->tokens;

const char *tk_ptr = (char *)token;

unsigned int off = tk_ptr - tks_ptr;

dbg(rules->udev, "* RULE '%s', off: %u(%u), next: %u, label: '%s'\n",

&rules->buf[token->rule.filename_off],

off / (unsigned int) sizeof(struct token), off,

token->rule.next_rule,

&rules->buf[token->rule.label_off]);

break;

}

case TK_M_ACTION:

case TK_M_DEVPATH:

case TK_M_KERNEL:

case TK_M_SUBSYSTEM:

case TK_M_DRIVER:

case TK_M_WAITFOR:

case TK_M_DEVLINK:

case TK_M_NAME:

case TK_M_KERNELS:

case TK_M_SUBSYSTEMS:

case TK_M_DRIVERS:

case TK_M_PROGRAM:

case TK_M_IMPORT_FILE:

case TK_M_IMPORT_PROG:

case TK_M_IMPORT_PARENT:

case TK_M_RESULT:

case TK_A_NAME:

case TK_A_DEVLINK:

case TK_A_OWNER:

case TK_A_GROUP:

case TK_A_MODE:

case TK_A_RUN:

dbg(rules->udev, "%s %s '%s'(%s)\n",

token_str[type], operation_str[op], value, string_glob_str[glob]);

break;

case TK_M_ATTR:

case TK_M_ATTRS:

case TK_M_ENV:

case TK_A_ATTR:

case TK_A_ENV:

dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",

token_str[type], operation_str[op], attr, value, string_glob_str[glob]);

break;

case TK_A_IGNORE_DEVICE:

case TK_A_STRING_ESCAPE_NONE:

case TK_A_STRING_ESCAPE_REPLACE:

case TK_A_LAST_RULE:

case TK_A_IGNORE_REMOVE:

dbg(rules->udev, "%s\n", token_str[type]);

break;

case TK_M_TEST:

dbg(rules->udev, "%s %s '%s'(%s) %#o\n",

token_str[type], operation_str[op], value, string_glob_str[glob], token->key.mode);

break;

case TK_A_NUM_FAKE_PART:

dbg(rules->udev, "%s %u\n", token_str[type], token->key.num_fake_part);

break;

case TK_A_DEVLINK_PRIO:

dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.devlink_prio);

break;

case TK_A_OWNER_ID:

dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.uid);

break;

case TK_A_GROUP_ID:

dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.gid);

break;

case TK_A_MODE_ID:

dbg(rules->udev, "%s %s %#o\n", token_str[type], operation_str[op], token->key.mode);

break;

case TK_A_EVENT_TIMEOUT:

dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.event_timeout);

break;

case TK_A_GOTO:

dbg(rules->udev, "%s '%s' %u\n", token_str[type], value, token->key.rule_goto);

break;

case TK_END:

dbg(rules->udev, "* %s\n", token_str[type]);

break;

case TK_M_PARENTS_MAX:

case TK_M_MAX:

case TK_UNSET:

dbg(rules->udev, "unknown type %u\n", type);

break;

}

}

static void dump_rules(struct udev_rules *rules)

{

unsigned int i;

dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",

rules->token_cur,

rules->token_cur * sizeof(struct token),

rules->buf_count,

rules->buf_cur);

for(i = 0; i < rules->token_cur; i++)

dump_token(rules, &rules->tokens[i]);

}

#else

static inline void dump_token(struct udev_rules *rules, struct token *token) {}

static inline void dump_rules(struct udev_rules *rules) {}

#endif /* DEBUG */

static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)

{

unsigned int i;

unsigned int start = 0;

unsigned int end = rule_tmp->token_cur;

for (i = 0; i < rule_tmp->token_cur; i++) {

enum token_type next_val = TK_UNSET;

unsigned int next_idx;

unsigned int j;

/* find smallest value */

for (j = start; j < end; j++) {

if (rule_tmp->token[j].type == TK_UNSET)

continue;

if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {

next_val = rule_tmp->token[j].type;

next_idx = j;

}

}

/* add token and mark done */

if (add_token(rules, &rule_tmp->token[next_idx]) != 0)

return -1;

rule_tmp->token[next_idx].type = TK_UNSET;

/* shrink range */

if (next_idx == start)

start++;

if (next_idx+1 == end)

end--;

}

return 0;

}

static int add_rule(struct udev_rules *rules, char *line,

const char *filename, unsigned int filename_off, unsigned int lineno)

{

int valid = 0;

char *linepos;

char *attr;

int physdev = 0;

struct rule_tmp rule_tmp;

memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));

rule_tmp.rules = rules;

rule_tmp.rule.type = TK_RULE;

rule_tmp.rule.rule.filename_off = filename_off;

linepos = line;

while (1) {

char *key;

char *value;

enum operation_type op;

if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)

break;

if (strcasecmp(key, "ACTION") == 0) {

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid ACTION operation\n");

goto invalid;

}

rule_add_token(&rule_tmp, TK_M_ACTION, op, value, NULL);

valid = 1;

continue;

}

if (strcasecmp(key, "DEVPATH") == 0) {

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid DEVPATH operation\n");

goto invalid;

}

rule_add_token(&rule_tmp, TK_M_DEVPATH, op, value, NULL);

valid = 1;

continue;

}

if (strcasecmp(key, "KERNEL") == 0) {

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid KERNEL operation\n");

goto invalid;

}

rule_add_token(&rule_tmp, TK_M_KERNEL, op, value, NULL);

valid = 1;

continue;

}

if (strcasecmp(key, "SUBSYSTEM") == 0) {

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid SUBSYSTEM operation\n");

goto invalid;

}

/* bus, class, subsystem events should all be the same */

if (strcmp(value, "subsystem") == 0 ||

strcmp(value, "bus") == 0 ||

strcmp(value, "class") == 0) {

if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)

err(rules->udev, "'%s' must be specified as 'subsystem' \n"

"please fix it in %s:%u", value, filename, lineno);

rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);

} else

rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);

valid = 1;

continue;

}

if (strcasecmp(key, "DRIVER") == 0) {

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid DRIVER operation\n");

goto invalid;

}

rule_add_token(&rule_tmp, TK_M_DRIVER, op, value, NULL);

valid = 1;

continue;

}

if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {

attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);

if (attr == NULL) {

err(rules->udev, "error parsing ATTR attribute\n");

goto invalid;

}

if (op < OP_MATCH_MAX) {

rule_add_token(&rule_tmp, TK_M_ATTR, op, value, attr);

} else {

rule_add_token(&rule_tmp, TK_A_ATTR, op, value, attr);

}

valid = 1;

continue;

}

if (strcasecmp(key, "KERNELS") == 0 ||

strcasecmp(key, "ID") == 0) {

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid KERNELS operation\n");

goto invalid;

}

rule_add_token(&rule_tmp, TK_M_KERNELS, op, value, NULL);

valid = 1;

continue;

}

if (strcasecmp(key, "SUBSYSTEMS") == 0 ||

strcasecmp(key, "BUS") == 0) {

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid SUBSYSTEMS operation\n");

goto invalid;

}

rule_add_token(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);

valid = 1;

continue;

}

if (strcasecmp(key, "DRIVERS") == 0) {

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid DRIVERS operation\n");

goto invalid;

}

rule_add_token(&rule_tmp, TK_M_DRIVERS, op, value, NULL);

valid = 1;

continue;

}

if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||

strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid ATTRS operation\n");

goto invalid;

}

attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);

if (attr == NULL) {

err(rules->udev, "error parsing ATTRS attribute\n");

goto invalid;

}

if (strncmp(attr, "device/", 7) == 0)

err(rules->udev, "the 'device' link may not be available in a future kernel, "

"please fix it in %s:%u", filename, lineno);

else if (strstr(attr, "../") != NULL)

err(rules->udev, "do not reference parent sysfs directories directly, "

"it may break with a future kernel, please fix it in %s:%u", filename, lineno);

rule_add_token(&rule_tmp, TK_M_ATTRS, op, value, attr);

valid = 1;

continue;

}

if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {

attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);

if (attr == NULL) {

err(rules->udev, "error parsing ENV attribute\n");

goto invalid;

}

if (strncmp(attr, "PHYSDEV", 7) == 0)

physdev = 1;

if (op < OP_MATCH_MAX) {

if (rule_add_token(&rule_tmp, TK_M_ENV, op, value, attr) != 0)

goto invalid;

} else {

if (rule_add_token(&rule_tmp, TK_A_ENV, op, value, attr) != 0)

goto invalid;

}

valid = 1;

continue;

}

if (strcasecmp(key, "PROGRAM") == 0) {

rule_add_token(&rule_tmp, TK_M_PROGRAM, op, value, NULL);

valid = 1;

continue;

}

if (strcasecmp(key, "RESULT") == 0) {

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid RESULT operation\n");

goto invalid;

}

rule_add_token(&rule_tmp, TK_M_RESULT, op, value, NULL);

valid = 1;

continue;

}

if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {

attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);

if (attr != NULL && strstr(attr, "program")) {

dbg(rules->udev, "IMPORT will be executed\n");

rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);

valid = 1;

} else if (attr != NULL && strstr(attr, "file")) {

dbg(rules->udev, "IMPORT will be included as file\n");

rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);

valid = 1;

} else if (attr != NULL && strstr(attr, "parent")) {

dbg(rules->udev, "IMPORT will include the parent values\n");

rule_add_token(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);

valid = 1;

} else {

/* figure it out if it is executable */

char file[UTIL_PATH_SIZE];

char *pos;

struct stat statbuf;

util_strlcpy(file, value, sizeof(file));

pos = strchr(file, ' ');

if (pos)

pos[0] = '\0';

/* allow programs in /lib/udev called without the path */

if (strchr(file, '/') == NULL) {

util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));

util_strlcat(file, value, sizeof(file));

pos = strchr(file, ' ');

if (pos)

pos[0] = '\0';

}

dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);

if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {

dbg(rules->udev, "IMPORT will be executed (autotype)\n");

rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);

valid = 1;

} else {

dbg(rules->udev, "IMPORT will be included as file (autotype)\n");

rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);

valid = 1;

}

}

continue;

}

if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {

mode_t mode = 0;

if (op > OP_MATCH_MAX) {

err(rules->udev, "invalid TEST operation\n");

goto invalid;

}

attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);

if (attr != NULL) {

mode = strtol(attr, NULL, 8);

rule_add_token(&rule_tmp, TK_M_TEST, op, value, &mode);

} else {

rule_add_token(&rule_tmp, TK_M_TEST, op, value, NULL);

}

valid = 1;

continue;

}

if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {

int flag = 0;

attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);

if (attr != NULL && strstr(attr, "ignore_error"))

flag = 1;

rule_add_token(&rule_tmp, TK_A_RUN, op, value, &flag);

valid = 1;

continue;

}

if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {

rule_add_token(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);

valid = 1;

continue;

}

if (strcasecmp(key, "LABEL") == 0) {

rule_tmp.rule.rule.label_off = add_string(rules, value);

valid = 1;

continue;

}

if (strcasecmp(key, "GOTO") == 0) {

rule_add_token(&rule_tmp, TK_A_GOTO, 0, value, NULL);

valid = 1;

continue;

}

if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {

if (op < OP_MATCH_MAX) {

rule_add_token(&rule_tmp, TK_M_NAME, op, value, NULL);

} else {

if (value[0] == '\0')

dbg(rules->udev, "name empty, node creation suppressed\n");

rule_add_token(&rule_tmp, TK_A_NAME, op, value, NULL);

attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);

if (attr != NULL) {

if (strstr(attr, "all_partitions") != NULL) {

int num = DEFAULT_FAKE_PARTITIONS_COUNT;

dbg(rules->udev, "creation of partition nodes requested\n");

rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);

}

if (strstr(attr, "ignore_remove") != NULL) {

dbg(rules->udev, "remove event should be ignored\n");

rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);

}

}

}

continue;

}

if (strcasecmp(key, "SYMLINK") == 0) {

if (op < OP_MATCH_MAX)

rule_add_token(&rule_tmp, TK_M_DEVLINK, op, value, NULL);

else

rule_add_token(&rule_tmp, TK_A_DEVLINK, op, value, NULL);

valid = 1;

continue;

}

if (strcasecmp(key, "OWNER") == 0) {

uid_t uid;

char *endptr;

uid = strtoul(value, &endptr, 10);

if (endptr[0] == '\0') {

rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);

} else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {

uid = add_uid(rules, value);

rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);

} else {

rule_add_token(&rule_tmp, TK_A_OWNER, op, value, NULL);

}

valid = 1;

continue;

}

if (strcasecmp(key, "GROUP") == 0) {

gid_t gid;

char *endptr;

gid = strtoul(value, &endptr, 10);

if (endptr[0] == '\0') {

rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);

} else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {

gid = add_gid(rules, value);

rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);

} else {

rule_add_token(&rule_tmp, TK_A_GROUP, op, value, NULL);

}

valid = 1;

continue;

}

if (strcasecmp(key, "MODE") == 0) {

mode_t mode;

char *endptr;

mode = strtol(value, &endptr, 8);

if (endptr[0] == '\0')

rule_add_token(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);

else

rule_add_token(&rule_tmp, TK_A_MODE, op, value, NULL);

valid = 1;

continue;

}

if (strcasecmp(key, "OPTIONS") == 0) {

const char *pos;

if (strstr(value, "last_rule") != NULL) {

dbg(rules->udev, "last rule to be applied\n");

rule_add_token(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);

}

if (strstr(value, "ignore_device") != NULL) {

dbg(rules->udev, "device should be ignored\n");

rule_add_token(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);

}

if (strstr(value, "ignore_remove") != NULL) {

dbg(rules->udev, "remove event should be ignored\n");

rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);

}

pos = strstr(value, "link_priority=");

if (pos != NULL) {

int prio = atoi(&pos[strlen("link_priority=")]);

rule_add_token(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);

dbg(rules->udev, "link priority=%i\n", prio);

}

pos = strstr(value, "event_timeout=");

if (pos != NULL) {

int tout = atoi(&pos[strlen("event_timeout=")]);

rule_add_token(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);

dbg(rules->udev, "event timout=%i\n", tout);

}

pos = strstr(value, "string_escape=");

if (pos != NULL) {

pos = &pos[strlen("string_escape=")];

if (strncmp(pos, "none", strlen("none")) == 0)

rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);

else if (strncmp(pos, "replace", strlen("replace")) == 0)

rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);

}

if (strstr(value, "all_partitions") != NULL) {

int num = DEFAULT_FAKE_PARTITIONS_COUNT;

rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);

dbg(rules->udev, "creation of partition nodes requested\n");

}

valid = 1;

continue;

}

err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);

}

if (physdev)

err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"

"please fix it in %s:%u", filename, lineno);

/* skip line if not any valid key was found */

if (!valid)

goto invalid;

/* add rule token */

if (add_token(rules, &rule_tmp.rule) != 0)

goto invalid;

/* add tokens to list, sorted by type */

if (sort_token(rules, &rule_tmp) != 0)

goto invalid;

return 0;

invalid:

err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);

return -1;

}

static int parse_file(struct udev_rules *rules, const char *filename)

{

FILE *f;

unsigned int filename_off;

unsigned int first_token;

char line[UTIL_LINE_SIZE];

int line_nr = 0;

unsigned int i;

info(rules->udev, "reading '%s' as rules file\n", filename);

f = fopen(filename, "r");

if (f == NULL)

return -1;

filename_off = add_string(rules, filename);

first_token = rules->token_cur;

while(fgets(line, sizeof(line), f) != NULL) {

char *key;

size_t len;

/* skip whitespace */

line_nr++;

key = line;

while (isspace(key[0]))

key++;

/* comment */

if (key[0] == '#')

continue;

len = strlen(line);

if (len < 3)

continue;

/* continue reading if backslash+newline is found */

while (line[len-2] == '\\') {

if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)

break;

line_nr++;

len = strlen(line);

}

if (len+1 >= sizeof(line)) {

err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);

continue;

}

add_rule(rules, key, filename, filename_off, line_nr);

}

fclose(f);

/* link GOTOs to LABEL rules in this file to be able to fast-forward */

for (i = first_token+1; i < rules->token_cur; i++) {

if (rules->tokens[i].type == TK_A_GOTO) {

char *label = &rules->buf[rules->tokens[i].key.value_off];

unsigned int j;

for (j = i+1; j < rules->token_cur; j++) {

if (rules->tokens[j].type != TK_RULE)

continue;

if (rules->tokens[j].rule.label_off == 0)

continue;

if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)

continue;

rules->tokens[i].key.rule_goto = j;

}

if (rules->tokens[i].key.rule_goto == 0)

err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);

}

}

return 0;

}

static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)

{

struct dirent *ent;

DIR *dir;

char filename[UTIL_PATH_SIZE];

dbg(udev, "open directory '%s'\n", dirname);

dir = opendir(dirname);

if (dir == NULL) {

err(udev, "unable to open '%s': %m\n", dirname);

return -1;

}

while (1) {

ent = readdir(dir);

if (ent == NULL || ent->d_name[0] == '\0')

break;

if ((ent->d_name[0] == '.') || (ent->d_name[0] == '#'))

continue;

/* look for file matching with specified suffix */

if (suffix != NULL) {

const char *ext;

ext = strrchr(ent->d_name, '.');

if (ext == NULL)

continue;

if (strcmp(ext, suffix) != 0)

continue;

}

dbg(udev, "put file '%s/%s' into list\n", dirname, ent->d_name);

snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);

filename[sizeof(filename)-1] = '\0';

udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);

}

closedir(dir);

return 0;

}

struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)

{

struct udev_rules *rules;

struct stat statbuf;

char filename[PATH_MAX];

struct udev_list_node file_list;

struct udev_list_entry *file_loop, *file_tmp;

unsigned int prev_rule;

struct token end_token;

unsigned int i;

rules = malloc(sizeof(struct udev_rules));

if (rules == NULL)

return NULL;

memset(rules, 0x00, sizeof(struct udev_rules));

rules->udev = udev;

rules->resolve_names = resolve_names;

udev_list_init(&file_list);

/* init token array and string buffer */

rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));

if (rules->tokens == NULL)

return NULL;

rules->token_max = PREALLOC_TOKEN;

rules->buf = malloc(PREALLOC_STRBUF);

if (rules->buf == NULL)

return NULL;

rules->buf_max = PREALLOC_STRBUF;

/* offset 0 is always '\0' */

rules->buf[0] = '\0';

rules->buf_cur = 1;

info(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",

rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);

if (udev_get_rules_path(udev) != NULL) {

/* custom rules location for testing */

add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");

} else {

struct udev_list_node sort_list;

struct udev_list_entry *sort_loop, *sort_tmp;

/* read user/custom rules */

add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");

/* read dynamic/temporary rules */

util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));

util_strlcat(filename, "/.udev/rules.d", sizeof(filename));

if (stat(filename, &statbuf) != 0) {

util_create_path(udev, filename);

udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);

mkdir(filename, 0755);

udev_selinux_resetfscreatecon(udev);

}

udev_list_init(&sort_list);

add_matching_files(udev, &sort_list, filename, ".rules");

/* read default rules */

add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");

/* sort all rules files by basename into list of files */

udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {

const char *sort_name = udev_list_entry_get_name(sort_loop);

const char *sort_base = strrchr(sort_name, '/');

if (sort_base == NULL)

continue;

udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {

const char *file_name = udev_list_entry_get_name(file_loop);

const char *file_base = strrchr(file_name, '/');

if (file_base == NULL)

continue;

if (strcmp(file_base, sort_base) == 0) {

info(udev, "rule file basename '%s' already added, ignoring '%s'\n",

file_name, sort_name);

udev_list_entry_remove(sort_loop);

sort_loop = NULL;

break;

}

if (strcmp(file_base, sort_base) > 0)

break;

}

if (sort_loop != NULL)

udev_list_entry_move_before(sort_loop, file_loop);

}

}

/* parse list of files */

udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {

const char *file_name = udev_list_entry_get_name(file_loop);

if (stat(file_name, &statbuf) == 0 && statbuf.st_size > 0)

parse_file(rules, file_name);

else

info(udev, "can not read '%s'\n", file_name);

udev_list_entry_remove(file_loop);

}

memset(&end_token, 0x00, sizeof(struct token));

end_token.type = TK_END;

add_token(rules, &end_token);

/* link all TK_RULE tokens to be able to fast-forward to next TK_RULE */

prev_rule = 0;

for (i = 1; i < rules->token_cur; i++) {

if (rules->tokens[i].type == TK_RULE) {

rules->tokens[prev_rule].rule.next_rule = i;

prev_rule = i;

}

}

/* shrink allocated token and string buffer */

if (rules->token_cur < rules->token_max) {

struct token *tokens;

tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));

if (tokens != NULL || rules->token_cur == 0) {

rules->tokens = tokens;

rules->token_max = rules->token_cur;

}

}

if (rules->buf_cur < rules->buf_max) {

char *buf;

buf = realloc(rules->buf, rules->buf_cur);

if (buf != NULL || rules->buf_cur == 0) {

rules->buf = buf;

rules->buf_max = rules->buf_cur;

}

}

info(udev, "shrunk to %lu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",

rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);

/* cleanup uid/gid cache */

free(rules->uids);

rules->uids = NULL;

rules->uids_cur = 0;

rules->uids_max = 0;

free(rules->gids);

rules->gids = NULL;

rules->gids_cur = 0;

rules->gids_max = 0;

dump_rules(rules);

return rules;

}

void udev_rules_unref(struct udev_rules *rules)

{

if (rules == NULL)

return;

free(rules->tokens);

free(rules->buf);

free(rules->uids);

free(rules->gids);

free(rules);

}

static int match_key(struct udev_rules *rules, struct token *token, const char *val)

{

char *key_value = &rules->buf[token->key.value_off];

char *pos;

int match = 0;

if (val == NULL)

val = "";

switch (token->key.glob) {

case GL_PLAIN:

match = (strcmp(key_value, val) == 0);

break;

case GL_GLOB:

match = (fnmatch(key_value, val, 0) == 0);

break;

case GL_SPLIT:

{

const char *split;

size_t len;

split = &rules->buf[token->key.value_off];

len = strlen(val);

while (1) {

const char *next;

next = strchr(split, '|');

if (next != NULL) {

size_t matchlen = (size_t)(next - split);

match = (matchlen == len && strncmp(split, val, matchlen) == 0);

if (match)

break;

} else {

match = (strcmp(split, val) == 0);

break;

}

split = &next[1];

}

break;

}

case GL_SPLIT_GLOB:

{

char value[UTIL_PATH_SIZE];

util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));

key_value = value;

while (key_value != NULL) {

pos = strchr(key_value, '|');

if (pos != NULL) {

pos[0] = '\0';

pos = &pos[1];

}

dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str[token->type], key_value, val);

match = (fnmatch(key_value, val, 0) == 0);

if (match)

break;

key_value = pos;

}

break;

}

case GL_SOMETHING:

match = (val[0] != '\0');

break;

case GL_FORMAT:

case GL_UNSET:

return -1;

}

if (match && (token->key.op == OP_MATCH)) {

dbg(rules->udev, "%s is true (matching value)\n", token_str[token->type]);

return 0;

}

if (!match && (token->key.op == OP_NOMATCH)) {

dbg(rules->udev, "%s is true (non-matching value)\n", token_str[token->type]);

return 0;

}

dbg(rules->udev, "%s is not true\n", token_str[token->type]);

return -1;

}

static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)

{

char attr[UTIL_PATH_SIZE];

const char *key_name = &rules->buf[cur->key.attr_off];

const char *key_value = &rules->buf[cur->key.value_off];

char value[UTIL_NAME_SIZE] = "";

size_t len;

util_strlcpy(attr, key_name, sizeof(attr));

util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);

if (value[0] == '\0') {

const char *val;

val = udev_device_get_sysattr_value(dev, key_name);

if (val != NULL)

util_strlcpy(value, val, sizeof(value));

}

if (value[0]=='\0')

return -1;

/* strip trailing whitespace of value, if not asked to match for it */

len = strlen(key_value);

if (len > 0 && !isspace(key_value[len-1])) {

len = strlen(value);

while (len > 0 && isspace(value[--len]))

value[len] = '\0';

dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);

}

return match_key(rules, cur, value);

}

enum escape_type {

ESCAPE_UNSET,

ESCAPE_NONE,

ESCAPE_REPLACE,

};

int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)

{

struct token *cur;

struct token *rule;

if (rules->tokens == NULL)

return -1;

/* loop through token list, match, run actions or forward to next rule */

cur = &rules->tokens[0];

rule = cur;

while (cur != NULL && cur->type != TK_END) {

enum escape_type esc = ESCAPE_UNSET;

unsigned int idx;

dump_token(rules, cur);

switch (cur->type) {

case TK_RULE:

/* current rule */

rule = cur;

esc = ESCAPE_UNSET;

break;

case TK_M_ACTION:

if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)

goto nomatch;

break;

case TK_M_DEVPATH:

if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)

goto nomatch;

break;

case TK_M_KERNEL:

if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)

goto nomatch;

break;

case TK_M_DEVLINK:

{

size_t devlen = strlen(udev_get_dev_path(event->udev))+1;

struct udev_list_entry *list_entry;

int match = 0;

udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {

const char *devlink;

devlink = &udev_list_entry_get_name(list_entry)[devlen];

if (match_key(rules, cur, devlink) == 0) {

match = 1;

break;

}

}

if (!match)

goto nomatch;

break;

}

case TK_M_NAME:

if (match_key(rules, cur, event->name) != 0)

goto nomatch;

break;

case TK_M_ENV:

{

struct udev_list_entry *list_entry;

const char *key_name = &rules->buf[cur->key.attr_off];

const char *value;

list_entry = udev_device_get_properties_list_entry(event->dev);

list_entry = udev_list_entry_get_by_name(list_entry, key_name);

value = udev_list_entry_get_value(list_entry);

if (value == NULL) {

dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);

value = "";

}

if (match_key(rules, cur, value))

goto nomatch;

break;

}

case TK_M_SUBSYSTEM:

if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)

goto nomatch;

break;

case TK_M_DRIVER:

if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)

goto nomatch;

break;

case TK_M_WAITFOR:

{

char filename[UTIL_PATH_SIZE];

int found;

util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));

udev_event_apply_format(event, filename, sizeof(filename));

found = (wait_for_file(event->dev, filename, 10) == 0);

if (!found && (cur->key.op != OP_NOMATCH))

goto nomatch;

break;

}

case TK_M_ATTR:

if (match_attr(rules, event->dev, event, cur) != 0)

goto nomatch;

break;

case TK_M_KERNELS:

case TK_M_SUBSYSTEMS:

case TK_M_DRIVERS:

case TK_M_ATTRS:

{

struct token *next;

/* get whole sequence of parent matches */

next = cur;

while (next->type < TK_M_PARENTS_MAX)

next++;

/* loop over parents */

event->dev_parent = event->dev;

while (1) {

struct token *key;

dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));

/* loop over sequence of parent match keys */

for (key = cur; key < next; key++ ) {

dump_token(rules, key);

switch(key->type) {

case TK_M_KERNELS:

if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)

goto try_parent;

break;

case TK_M_SUBSYSTEMS:

if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)

goto try_parent;

break;

case TK_M_DRIVERS:

if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)

goto try_parent;

break;

case TK_M_ATTRS:

if (match_attr(rules, event->dev_parent, event, key) != 0)

goto try_parent;

break;

default:

goto nomatch;

}

dbg(event->udev, "parent key matched\n");

}

dbg(event->udev, "all parent keys matched\n");

/* all keys matched */

break;

try_parent:

event->dev_parent = udev_device_get_parent(event->dev_parent);

if (event->dev_parent == NULL)

goto nomatch;

}

/* move behind our sequence of parent match keys */

cur = next;

continue;

}

case TK_M_TEST:

{

char filename[UTIL_PATH_SIZE];

struct stat statbuf;

int match;

util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));

udev_event_apply_format(event, filename, sizeof(filename));

if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)

if (filename[0] != '/') {

char tmp[UTIL_PATH_SIZE];

util_strlcpy(tmp, udev_device_get_syspath(event->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));

match = (stat(filename, &statbuf) == 0);

info(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");

if (match && cur->key.mode > 0) {

match = ((statbuf.st_mode & cur->key.mode) > 0);

info(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,

match ? "matches" : "does not match", cur->key.mode);

}

if (match && cur->key.op == OP_NOMATCH)

goto nomatch;

if (!match && cur->key.op == OP_MATCH)

goto nomatch;

break;

}

case TK_M_PROGRAM:

{

char program[UTIL_PATH_SIZE];

char **envp;

char result[UTIL_PATH_SIZE];

free(event->program_result);

event->program_result = NULL;

util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));

udev_event_apply_format(event, program, sizeof(program));

envp = udev_device_get_properties_envp(event->dev);

if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {

if (cur->key.op != OP_NOMATCH)

goto nomatch;

} else {

int count;

util_remove_trailing_chars(result, '\n');

if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {

count = util_replace_chars(result, ALLOWED_CHARS_INPUT);

if (count > 0)

info(event->udev, "%i character(s) replaced\n" , count);

}

event->program_result = strdup(result);

dbg(event->udev, "storing result '%s'\n", event->program_result);

if (cur->key.op == OP_NOMATCH)

goto nomatch;

}

break;

}

case TK_M_IMPORT_FILE:

{

char import[UTIL_PATH_SIZE];

util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));

udev_event_apply_format(event, import, sizeof(import));

if (import_file_into_properties(event->dev, import) != 0)

if (cur->key.op != OP_NOMATCH)

goto nomatch;

break;

}

case TK_M_IMPORT_PROG:

{

char import[UTIL_PATH_SIZE];

util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));

udev_event_apply_format(event, import, sizeof(import));

if (import_program_into_properties(event->dev, import) != 0)

if (cur->key.op != OP_NOMATCH)

goto nomatch;

break;

}

case TK_M_IMPORT_PARENT:

{

char import[UTIL_PATH_SIZE];

util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));

udev_event_apply_format(event, import, sizeof(import));

if (import_parent_into_properties(event->dev, import) != 0)

if (cur->key.op != OP_NOMATCH)

goto nomatch;

break;

}

case TK_M_RESULT:

if (match_key(rules, cur, event->program_result) != 0)

goto nomatch;

break;

case TK_A_IGNORE_DEVICE:

event->ignore_device = 1;

return 0;

break;

case TK_A_STRING_ESCAPE_NONE:

esc = ESCAPE_NONE;

break;

case TK_A_STRING_ESCAPE_REPLACE:

esc = ESCAPE_REPLACE;

break;

case TK_A_NUM_FAKE_PART:

if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)

break;

if (udev_device_get_sysnum(event->dev) != NULL)

break;

udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);

break;

case TK_A_DEVLINK_PRIO:

udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);

break;

case TK_A_OWNER:

{

char owner[UTIL_NAME_SIZE];

if (event->owner_final)

break;

if (cur->key.op == OP_ASSIGN_FINAL)

event->owner_final = 1;

util_strlcpy(owner, &rules->buf[cur->key.value_off], sizeof(owner));

udev_event_apply_format(event, owner, sizeof(owner));

event->uid = util_lookup_user(event->udev, owner);

break;

}

case TK_A_GROUP:

{

char group[UTIL_NAME_SIZE];

if (event->group_final)

break;

if (cur->key.op == OP_ASSIGN_FINAL)

event->group_final = 1;

util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));

udev_event_apply_format(event, group, sizeof(group));

event->gid = util_lookup_group(event->udev, group);

break;

}

case TK_A_MODE:

{

char mode[UTIL_NAME_SIZE];

char *endptr;

if (event->mode_final)

break;

if (cur->key.op == OP_ASSIGN_FINAL)

event->mode_final = 1;

util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));

udev_event_apply_format(event, mode, sizeof(mode));

event->mode = strtol(mode, &endptr, 8);

if (endptr[0] != '\0') {

err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);

event->mode = 0660;

}

break;

}

case TK_A_OWNER_ID:

if (event->owner_final)

break;

if (cur->key.op == OP_ASSIGN_FINAL)

event->owner_final = 1;

event->uid = cur->key.uid;

break;

case TK_A_GROUP_ID:

if (event->group_final)

break;

if (cur->key.op == OP_ASSIGN_FINAL)

event->group_final = 1;

event->gid = cur->key.gid;

break;

case TK_A_MODE_ID:

if (event->mode_final)

break;

if (cur->key.op == OP_ASSIGN_FINAL)

event->mode_final = 1;

event->mode = cur->key.mode;

break;

case TK_A_ENV:

{

const char *name = &rules->buf[cur->key.attr_off];

char *value = &rules->buf[cur->key.value_off];

if (value[0] != '\0') {

char temp_value[UTIL_NAME_SIZE];

struct udev_list_entry *entry;

util_strlcpy(temp_value, value, sizeof(temp_value));

udev_event_apply_format(event, temp_value, sizeof(temp_value));

entry = udev_device_add_property(event->dev, name, temp_value);

/* store in db */

udev_list_entry_set_flag(entry, 1);

} else {

udev_device_add_property(event->dev, name, NULL);

}

break;

}

case TK_A_NAME:

{

const char *name = &rules->buf[cur->key.value_off];

char name_str[UTIL_PATH_SIZE];

int count;

if (event->name_final)

break;

if (cur->key.op == OP_ASSIGN_FINAL)

event->name_final = 1;

if (name[0] == '\0') {

free(event->name);

event->name = NULL;

break;

}

util_strlcpy(name_str, name, sizeof(name_str));

udev_event_apply_format(event, name_str, sizeof(name_str));

if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {

count = util_replace_chars(name_str, ALLOWED_CHARS_FILE);

if (count > 0)

info(event->udev, "%i character(s) replaced\n", count);

free(event->name);

event->name = strdup(name_str);

}

break;

}

case TK_A_DEVLINK:

{

char temp[UTIL_PATH_SIZE];

char filename[UTIL_PATH_SIZE];

char *pos, *next;

int count = 0;

if (event->devlink_final)

break;

if (major(udev_device_get_devnum(event->dev)) == 0)

break;

if (cur->key.op == OP_ASSIGN_FINAL)

event->devlink_final = 1;

if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)

udev_device_cleanup_devlinks_list(event->dev);

/* allow multiple symlinks separated by spaces */

util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));

udev_event_apply_format(event, temp, sizeof(temp));

if (esc == ESCAPE_UNSET)

count = util_replace_chars(temp, ALLOWED_CHARS_FILE " ");

else if (esc == ESCAPE_REPLACE)

count = util_replace_chars(temp, ALLOWED_CHARS_FILE);

if (count > 0)

info(event->udev, "%i character(s) replaced\n" , count);

dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);

pos = temp;