#include <ctype.h>
#include <unistd.h>
#include <errno.h>
-#include <syslog.h>
#include <dirent.h>
#include <fnmatch.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
#include "udev.h"
-#include "udev-rules.h"
-extern char **environ;
+struct udev_rules {
+ struct udev *udev;
+ char *buf;
+ size_t bufsize;
+ int resolve_names;
+};
+
+struct udev_rules_iter {
+ struct udev_rules *rules;
+ size_t current;
+};
+
+enum key_operation {
+ KEY_OP_UNSET,
+ KEY_OP_MATCH,
+ KEY_OP_NOMATCH,
+ KEY_OP_ADD,
+ KEY_OP_ASSIGN,
+ KEY_OP_ASSIGN_FINAL,
+};
+
+struct key {
+ enum key_operation operation;
+ size_t val_off;
+};
+
+struct key_pair {
+ struct key key;
+ size_t key_name_off;
+};
+
+#define PAIRS_MAX 5
+struct key_pairs {
+ int count;
+ struct key_pair keys[PAIRS_MAX];
+};
+
+enum import_type {
+ IMPORT_UNSET,
+ IMPORT_PROGRAM,
+ IMPORT_FILE,
+ IMPORT_PARENT,
+};
+
+enum escape_type {
+ ESCAPE_UNSET,
+ ESCAPE_NONE,
+ ESCAPE_REPLACE,
+};
+
+struct udev_rule {
+ struct key action;
+ struct key devpath;
+ struct key kernel;
+ struct key subsystem;
+ struct key driver;
+ struct key_pairs attr;
+
+ struct key kernels;
+ struct key subsystems;
+ struct key drivers;
+ struct key_pairs attrs;
+
+ struct key_pairs env;
+ struct key program;
+ struct key result;
+ struct key import;
+ enum import_type import_type;
+ struct key test;
+ mode_t test_mode_mask;
+ struct key run;
+ struct key wait_for;
+ struct key label;
+ struct key goto_label;
+ size_t goto_rule_off;
+
+ struct key name;
+ struct key symlink;
+ struct key symlink_match;
+ struct key owner;
+ struct key group;
+ struct key mode;
+ enum escape_type string_escape;
+
+ unsigned int link_priority;
+ int event_timeout;
+ unsigned int partitions;
+ unsigned int last_rule:1,
+ run_ignore_error:1,
+ ignore_device:1,
+ ignore_remove:1;
+
+ size_t bufsize;
+ char buf[];
+};
+
+static void udev_rules_iter_init(struct udev_rules_iter *iter, struct udev_rules *rules)
+{
+ dbg(rules->udev, "bufsize=%zi\n", rules->bufsize);
+ iter->rules = rules;
+ iter->current = 0;
+}
+
+static struct udev_rule *udev_rules_iter_next(struct udev_rules_iter *iter)
+{
+ struct udev_rules *rules;
+ struct udev_rule *rule;
+
+ rules = iter->rules;
+ if (!rules)
+ return NULL;
+
+ dbg(rules->udev, "current=%zi\n", iter->current);
+ if (iter->current >= rules->bufsize) {
+ dbg(rules->udev, "no more rules\n");
+ return NULL;
+ }
+
+ /* get next rule */
+ rule = (struct udev_rule *) (rules->buf + iter->current);
+ iter->current += sizeof(struct udev_rule) + rule->bufsize;
+
+ return rule;
+}
+
+static struct udev_rule *udev_rules_iter_goto(struct udev_rules_iter *iter, size_t rule_off)
+{
+ struct udev_rules *rules = iter->rules;
+ struct udev_rule *rule;
+
+ dbg(rules->udev, "current=%zi\n", iter->current);
+ iter->current = rule_off;
+ rule = (struct udev_rule *) (rules->buf + iter->current);
+
+ return rule;
+}
+
+static size_t find_label(const struct udev_rules_iter *iter, const char *label)
+{
+ struct udev_rule *rule;
+ struct udev_rules *rules = iter->rules;
+ size_t current = iter->current;
+
+next:
+ dbg(rules->udev, "current=%zi\n", current);
+ if (current >= rules->bufsize) {
+ dbg(rules->udev, "LABEL='%s' not found\n", label);
+ return 0;
+ }
+ rule = (struct udev_rule *) (rules->buf + current);
+
+ if (strcmp(&rule->buf[rule->label.val_off], label) != 0) {
+ dbg(rules->udev, "moving forward, looking for label '%s'\n", label);
+ current += sizeof(struct udev_rule) + rule->bufsize;
+ goto next;
+ }
+
+ dbg(rules->udev, "found label '%s'\n", label);
+ return current;
+}
/* extract possible {attr} and move str behind it */
static char *get_format_attribute(struct udev *udev, char **str)
return -1;
}
-static int run_program(struct udev_device *dev, const char *command,
- char *result, size_t ressize, size_t *reslen)
-{
- struct udev *udev = udev_device_get_udev(dev);
- int status;
- char **envp;
- int outpipe[2] = {-1, -1};
- int errpipe[2] = {-1, -1};
- pid_t pid;
- char arg[UTIL_PATH_SIZE];
- char program[UTIL_PATH_SIZE];
- char *argv[(sizeof(arg) / 2) + 1];
- int devnull;
- int i;
- int err = 0;
-
- /* build argv from command */
- util_strlcpy(arg, command, sizeof(arg));
- i = 0;
- if (strchr(arg, ' ') != NULL) {
- char *pos = arg;
-
- while (pos != NULL && pos[0] != '\0') {
- if (pos[0] == '\'') {
- /* do not separate quotes */
- pos++;
- argv[i] = strsep(&pos, "\'");
- while (pos != NULL && pos[0] == ' ')
- pos++;
- } else {
- argv[i] = strsep(&pos, " ");
- }
- dbg(udev, "arg[%i] '%s'\n", i, argv[i]);
- i++;
- }
- argv[i] = NULL;
- } else {
- argv[0] = arg;
- argv[1] = NULL;
- }
- info(udev, "'%s'\n", command);
-
- /* prepare pipes from child to parent */
- if (result != NULL || udev_get_log_priority(udev) >= LOG_INFO) {
- if (pipe(outpipe) != 0) {
- err(udev, "pipe failed: %m\n");
- return -1;
- }
- }
- if (udev_get_log_priority(udev) >= LOG_INFO) {
- if (pipe(errpipe) != 0) {
- err(udev, "pipe failed: %m\n");
- return -1;
- }
- }
-
- /* allow programs in /lib/udev/ to be called without the path */
- if (strchr(argv[0], '/') == NULL) {
- util_strlcpy(program, UDEV_PREFIX "/lib/udev/", sizeof(program));
- util_strlcat(program, argv[0], sizeof(program));
- argv[0] = program;
- }
-
- envp = udev_device_get_properties_envp(dev);
-
- pid = fork();
- switch(pid) {
- case 0:
- /* child closes parent ends of pipes */
- if (outpipe[READ_END] > 0)
- close(outpipe[READ_END]);
- if (errpipe[READ_END] > 0)
- close(errpipe[READ_END]);
-
- /* discard child output or connect to pipe */
- devnull = open("/dev/null", O_RDWR);
- if (devnull > 0) {
- dup2(devnull, STDIN_FILENO);
- if (outpipe[WRITE_END] < 0)
- dup2(devnull, STDOUT_FILENO);
- if (errpipe[WRITE_END] < 0)
- dup2(devnull, STDERR_FILENO);
- close(devnull);
- } else
- err(udev, "open /dev/null failed: %m\n");
- if (outpipe[WRITE_END] > 0) {
- dup2(outpipe[WRITE_END], STDOUT_FILENO);
- close(outpipe[WRITE_END]);
- }
- if (errpipe[WRITE_END] > 0) {
- dup2(errpipe[WRITE_END], STDERR_FILENO);
- close(errpipe[WRITE_END]);
- }
- execve(argv[0], argv, envp);
- if (errno == ENOENT || errno == ENOTDIR) {
- /* may be on a filesytem which is not mounted right now */
- info(udev, "program '%s' not found\n", argv[0]);
- } else {
- /* other problems */
- err(udev, "exec of program '%s' failed\n", argv[0]);
- }
- _exit(1);
- case -1:
- err(udev, "fork of '%s' failed: %m\n", argv[0]);
- return -1;
- default:
- /* read from child if requested */
- if (outpipe[READ_END] > 0 || errpipe[READ_END] > 0) {
- ssize_t count;
- size_t respos = 0;
-
- /* parent closes child ends of pipes */
- if (outpipe[WRITE_END] > 0)
- close(outpipe[WRITE_END]);
- if (errpipe[WRITE_END] > 0)
- close(errpipe[WRITE_END]);
-
- /* read child output */
- while (outpipe[READ_END] > 0 || errpipe[READ_END] > 0) {
- int fdcount;
- fd_set readfds;
-
- FD_ZERO(&readfds);
- if (outpipe[READ_END] > 0)
- FD_SET(outpipe[READ_END], &readfds);
- if (errpipe[READ_END] > 0)
- FD_SET(errpipe[READ_END], &readfds);
- fdcount = select(UDEV_MAX(outpipe[READ_END], errpipe[READ_END])+1, &readfds, NULL, NULL, NULL);
- if (fdcount < 0) {
- if (errno == EINTR)
- continue;
- err = -1;
- break;
- }
-
- /* get stdout */
- if (outpipe[READ_END] > 0 && FD_ISSET(outpipe[READ_END], &readfds)) {
- char inbuf[1024];
- char *pos;
- char *line;
-
- count = read(outpipe[READ_END], inbuf, sizeof(inbuf)-1);
- if (count <= 0) {
- close(outpipe[READ_END]);
- outpipe[READ_END] = -1;
- if (count < 0) {
- err(udev, "stdin read failed: %m\n");
- err = -1;
- }
- continue;
- }
- inbuf[count] = '\0';
-
- /* store result for rule processing */
- if (result) {
- if (respos + count < ressize) {
- memcpy(&result[respos], inbuf, count);
- respos += count;
- } else {
- err(udev, "ressize %ld too short\n", (long)ressize);
- err = -1;
- }
- }
- pos = inbuf;
- while ((line = strsep(&pos, "\n")))
- if (pos || line[0] != '\0')
- info(udev, "'%s' (stdout) '%s'\n", argv[0], line);
- }
-
- /* get stderr */
- if (errpipe[READ_END] > 0 && FD_ISSET(errpipe[READ_END], &readfds)) {
- char errbuf[1024];
- char *pos;
- char *line;
-
- count = read(errpipe[READ_END], errbuf, sizeof(errbuf)-1);
- if (count <= 0) {
- close(errpipe[READ_END]);
- errpipe[READ_END] = -1;
- if (count < 0)
- err(udev, "stderr read failed: %m\n");
- continue;
- }
- errbuf[count] = '\0';
- pos = errbuf;
- while ((line = strsep(&pos, "\n")))
- if (pos || line[0] != '\0')
- info(udev, "'%s' (stderr) '%s'\n", argv[0], line);
- }
- }
- if (outpipe[READ_END] > 0)
- close(outpipe[READ_END]);
- if (errpipe[READ_END] > 0)
- close(errpipe[READ_END]);
-
- /* return the childs stdout string */
- if (result) {
- result[respos] = '\0';
- dbg(udev, "result='%s'\n", result);
- if (reslen)
- *reslen = respos;
- }
- }
- waitpid(pid, &status, 0);
- if (WIFEXITED(status)) {
- info(udev, "'%s' returned with status %i\n", argv[0], WEXITSTATUS(status));
- if (WEXITSTATUS(status) != 0)
- err = -1;
- } else {
- err(udev, "'%s' abnormal exit\n", argv[0]);
- err = -1;
- }
- }
-
- return err;
-}
-
static int import_property_from_string(struct udev_device *dev, char *line)
{
struct udev *udev = udev_device_get_udev(dev);
f = fopen(filename, "r");
if (f == NULL)
return -1;
- while (fgets(line, sizeof(line), f))
+ while (fgets(line, sizeof(line), f) != NULL)
import_property_from_string(dev, line);
fclose(f);
return 0;
static int import_program_into_env(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;
- if (run_program(dev, program, result, sizeof(result), &reslen) != 0)
+ envp = udev_device_get_properties_envp(dev);
+ if (run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
return -1;
line = result;
return 0;
}
-int udev_rules_run(struct udev_event *event)
-{
- struct udev_list_entry *list_entry;
- int err = 0;
-
- dbg(event->udev, "executing run list\n");
- udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
- const char *cmd = udev_list_entry_get_name(list_entry);
-
- if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
- struct udev_monitor *monitor;
-
- monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
- if (monitor == NULL)
- continue;
- udev_monitor_send_device(monitor, event->dev);
- udev_monitor_unref(monitor);
- } else {
- char program[UTIL_PATH_SIZE];
-
- util_strlcpy(program, cmd, sizeof(program));
- udev_rules_apply_format(event, program, sizeof(program));
- if (run_program(event->dev, program, NULL, 0, NULL) != 0) {
- if (!udev_list_entry_get_flag(list_entry))
- err = -1;
- }
- }
- }
- return err;
-}
-
#define WAIT_LOOP_PER_SECOND 50
static int wait_for_file(struct udev_event *event, const char *file, int timeout)
{
/* execute external program */
if (rule->program.operation != KEY_OP_UNSET) {
char program[UTIL_PATH_SIZE];
+ char **envp;
char result[UTIL_PATH_SIZE];
util_strlcpy(program, key_val(rule, &rule->program), sizeof(program));
udev_rules_apply_format(event, program, sizeof(program));
- if (run_program(event->dev, program, result, sizeof(result), NULL) != 0) {
+ 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");
event->program_result[0] = '\0';
if (rule->program.operation != KEY_OP_NOMATCH)
if (match_key(event->udev, "RESULT", rule, &rule->result, event->program_result))
goto nomatch;
- /* import variables returned from program or or file into environment */
+ /* import variables returned from program or or file into properties */
if (rule->import.operation != KEY_OP_UNSET) {
char import[UTIL_PATH_SIZE];
int rc = -1;
return 0;
}
+
+static int get_key(struct udev_rules *rules, char **line, char **key, enum key_operation *operation, 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] == '=') {
+ *operation = KEY_OP_MATCH;
+ linepos += 2;
+ dbg(rules->udev, "match:\n");
+ } else if (linepos[0] == '!' && linepos[1] == '=') {
+ *operation = KEY_OP_NOMATCH;
+ linepos += 2;
+ dbg(rules->udev, "nomatch:\n");
+ } else if (linepos[0] == '+' && linepos[1] == '=') {
+ *operation = KEY_OP_ADD;
+ linepos += 2;
+ dbg(rules->udev, "add:\n");
+ } else if (linepos[0] == '=') {
+ *operation = KEY_OP_ASSIGN;
+ linepos++;
+ dbg(rules->udev, "assign:\n");
+ } else if (linepos[0] == ':' && linepos[1] == '=') {
+ *operation = KEY_OP_ASSIGN_FINAL;
+ linepos += 2;
+ dbg(rules->udev, "assign_final:\n");
+ } 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;
+
+ temp = strchr(linepos, '"');
+ if (!temp)
+ return -1;
+ temp[0] = '\0';
+ temp++;
+ dbg(rules->udev, "'%s'-'%s'\n", *key, *value);
+
+ /* move line to next key */
+ *line = temp;
+ return 0;
+}
+
+/* extract possible KEY{attr} */
+static char *get_key_attribute(struct udev_rules *rules, char *str)
+{
+ char *pos;
+ char *attr;
+
+ attr = strchr(str, '{');
+ if (attr != NULL) {
+ attr++;
+ pos = strchr(attr, '}');
+ if (pos == NULL) {
+ err(rules->udev, "missing closing brace for format\n");
+ return NULL;
+ }
+ pos[0] = '\0';
+ dbg(rules->udev, "attribute='%s'\n", attr);
+ return attr;
+ }
+
+ return NULL;
+}
+
+static int add_rule_key(struct udev_rule *rule, struct key *key,
+ enum key_operation operation, const char *value)
+{
+ size_t val_len = strnlen(value, UTIL_PATH_SIZE);
+
+ key->operation = operation;
+
+ key->val_off = rule->bufsize;
+ util_strlcpy(rule->buf + rule->bufsize, value, val_len+1);
+ rule->bufsize += val_len+1;
+
+ return 0;
+}
+
+static int add_rule_key_pair(struct udev_rules *rules, struct udev_rule *rule, struct key_pairs *pairs,
+ enum key_operation operation, const char *key, const char *value)
+{
+ size_t key_len = strnlen(key, UTIL_PATH_SIZE);
+
+ if (pairs->count >= PAIRS_MAX) {
+ err(rules->udev, "skip, too many keys of the same type in a single rule\n");
+ return -1;
+ }
+
+ add_rule_key(rule, &pairs->keys[pairs->count].key, operation, value);
+
+ /* add the key-name of the pair */
+ pairs->keys[pairs->count].key_name_off = rule->bufsize;
+ util_strlcpy(rule->buf + rule->bufsize, key, key_len+1);
+ rule->bufsize += key_len+1;
+
+ pairs->count++;
+
+ return 0;
+}
+
+static int add_to_rules(struct udev_rules *rules, char *line, const char *filename, unsigned int lineno)
+{
+ char buf[sizeof(struct udev_rule) + UTIL_LINE_SIZE];
+ struct udev_rule *rule;
+ size_t rule_size;
+ int valid;
+ char *linepos;
+ char *attr;
+ size_t padding;
+ int physdev = 0;
+
+ memset(buf, 0x00, sizeof(buf));
+ rule = (struct udev_rule *) buf;
+ rule->event_timeout = -1;
+ linepos = line;
+ valid = 0;
+
+ /* get all the keys */
+ while (1) {
+ char *key;
+ char *value;
+ enum key_operation operation = KEY_OP_UNSET;
+
+ if (get_key(rules, &linepos, &key, &operation, &value) != 0)
+ break;
+
+ if (strcasecmp(key, "ACTION") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err(rules->udev, "invalid ACTION operation\n");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->action, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "DEVPATH") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err(rules->udev, "invalid DEVPATH operation\n");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->devpath, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "KERNEL") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err(rules->udev, "invalid KERNEL operation\n");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->kernel, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "SUBSYSTEM") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ 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);
+ add_rule_key(rule, &rule->subsystem, operation, "subsystem|class|bus");
+ } else
+ add_rule_key(rule, &rule->subsystem, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "DRIVER") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err(rules->udev, "invalid DRIVER operation\n");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->driver, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
+ attr = get_key_attribute(rules, key + sizeof("ATTR")-1);
+ if (attr == NULL) {
+ err(rules->udev, "error parsing ATTR attribute\n");
+ goto invalid;
+ }
+ if (add_rule_key_pair(rules, rule, &rule->attr, operation, attr, value) != 0)
+ goto invalid;
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "KERNELS") == 0 ||
+ strcasecmp(key, "ID") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err(rules->udev, "invalid KERNELS operation\n");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->kernels, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
+ strcasecmp(key, "BUS") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err(rules->udev, "invalid SUBSYSTEMS operation\n");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->subsystems, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "DRIVERS") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err(rules->udev, "invalid DRIVERS operation\n");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->drivers, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
+ strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err(rules->udev, "invalid ATTRS operation\n");
+ goto invalid;
+ }
+ attr = get_key_attribute(rules, 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);
+ if (add_rule_key_pair(rules, rule, &rule->attrs, operation, attr, value) != 0)
+ goto invalid;
+ valid = 1;
+ continue;
+ }
+
+ if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
+ attr = get_key_attribute(rules, 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 (add_rule_key_pair(rules, rule, &rule->env, operation, attr, value) != 0)
+ goto invalid;
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "PROGRAM") == 0) {
+ add_rule_key(rule, &rule->program, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "RESULT") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err(rules->udev, "invalid RESULT operation\n");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->result, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
+ attr = get_key_attribute(rules, key + sizeof("IMPORT")-1);
+ if (attr != NULL && strstr(attr, "program")) {
+ dbg(rules->udev, "IMPORT will be executed\n");
+ rule->import_type = IMPORT_PROGRAM;
+ } else if (attr != NULL && strstr(attr, "file")) {
+ dbg(rules->udev, "IMPORT will be included as file\n");
+ rule->import_type = IMPORT_FILE;
+ } else if (attr != NULL && strstr(attr, "parent")) {
+ dbg(rules->udev, "IMPORT will include the parent values\n");
+ rule->import_type = IMPORT_PARENT;
+ } 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 is executable, will be executed (autotype)\n");
+ rule->import_type = IMPORT_PROGRAM;
+ } else {
+ dbg(rules->udev, "IMPORT is not executable, will be included as file (autotype)\n");
+ rule->import_type = IMPORT_FILE;
+ }
+ }
+ add_rule_key(rule, &rule->import, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err(rules->udev, "invalid TEST operation\n");
+ goto invalid;
+ }
+ attr = get_key_attribute(rules, key + sizeof("TEST")-1);
+ if (attr != NULL)
+ rule->test_mode_mask = strtol(attr, NULL, 8);
+ add_rule_key(rule, &rule->test, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
+ attr = get_key_attribute(rules, key + sizeof("RUN")-1);
+ if (attr != NULL) {
+ if (strstr(attr, "ignore_error"))
+ rule->run_ignore_error = 1;
+ }
+ add_rule_key(rule, &rule->run, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
+ add_rule_key(rule, &rule->wait_for, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "LABEL") == 0) {
+ add_rule_key(rule, &rule->label, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "GOTO") == 0) {
+ add_rule_key(rule, &rule->goto_label, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
+ attr = get_key_attribute(rules, key + sizeof("NAME")-1);
+ if (attr != NULL) {
+ if (strstr(attr, "all_partitions") != NULL) {
+ dbg(rules->udev, "creation of partition nodes requested\n");
+ rule->partitions = DEFAULT_FAKE_PARTITIONS_COUNT;
+ }
+ if (strstr(attr, "ignore_remove") != NULL) {
+ dbg(rules->udev, "remove event should be ignored\n");
+ rule->ignore_remove = 1;
+ }
+ }
+ if (value[0] == '\0')
+ dbg(rules->udev, "name empty, node creation supressed\n");
+ add_rule_key(rule, &rule->name, operation, value);
+ continue;
+ }
+
+ if (strcasecmp(key, "SYMLINK") == 0) {
+ if (operation == KEY_OP_MATCH ||
+ operation == KEY_OP_NOMATCH)
+ add_rule_key(rule, &rule->symlink_match, operation, value);
+ else
+ add_rule_key(rule, &rule->symlink, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "OWNER") == 0) {
+ valid = 1;
+ if (rules->resolve_names && (!strchr(value, '$') && !strchr(value, '%'))) {
+ char *endptr;
+ strtoul(value, &endptr, 10);
+ if (endptr[0] != '\0') {
+ char owner[32];
+ uid_t uid = lookup_user(rules->udev, value);
+ dbg(rules->udev, "replacing username='%s' by id=%i\n", value, uid);
+ sprintf(owner, "%u", (unsigned int) uid);
+ add_rule_key(rule, &rule->owner, operation, owner);
+ continue;
+ }
+ }
+
+ add_rule_key(rule, &rule->owner, operation, value);
+ continue;
+ }
+
+ if (strcasecmp(key, "GROUP") == 0) {
+ valid = 1;
+ if (rules->resolve_names && (!strchr(value, '$') && !strchr(value, '%'))) {
+ char *endptr;
+ strtoul(value, &endptr, 10);
+ if (endptr[0] != '\0') {
+ char group[32];
+ gid_t gid = lookup_group(rules->udev, value);
+ dbg(rules->udev, "replacing groupname='%s' by id=%i\n", value, gid);
+ sprintf(group, "%u", (unsigned int) gid);
+ add_rule_key(rule, &rule->group, operation, group);
+ continue;
+ }
+ }
+
+ add_rule_key(rule, &rule->group, operation, value);
+ continue;
+ }
+
+ if (strcasecmp(key, "MODE") == 0) {
+ add_rule_key(rule, &rule->mode, operation, value);
+ 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->last_rule = 1;
+ }
+ if (strstr(value, "ignore_device") != NULL) {
+ dbg(rules->udev, "device should be ignored\n");
+ rule->ignore_device = 1;
+ }
+ if (strstr(value, "ignore_remove") != NULL) {
+ dbg(rules->udev, "remove event should be ignored\n");
+ rule->ignore_remove = 1;
+ }
+ pos = strstr(value, "link_priority=");
+ if (pos != NULL) {
+ rule->link_priority = atoi(&pos[strlen("link_priority=")]);
+ dbg(rules->udev, "link priority=%i\n", rule->link_priority);
+ }
+ pos = strstr(value, "event_timeout=");
+ if (pos != NULL) {
+ rule->event_timeout = atoi(&pos[strlen("event_timeout=")]);
+ dbg(rules->udev, "event timout=%i\n", rule->event_timeout);
+ }
+ pos = strstr(value, "string_escape=");
+ if (pos != NULL) {
+ pos = &pos[strlen("string_escape=")];
+ if (strncmp(pos, "none", strlen("none")) == 0)
+ rule->string_escape = ESCAPE_NONE;
+ else if (strncmp(pos, "replace", strlen("replace")) == 0)
+ rule->string_escape = ESCAPE_REPLACE;
+ }
+ if (strstr(value, "all_partitions") != NULL) {
+ dbg(rules->udev, "creation of partition nodes requested\n");
+ rule->partitions = DEFAULT_FAKE_PARTITIONS_COUNT;
+ }
+ valid = 1;
+ continue;
+ }
+
+ err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
+ }
+
+ if (physdev && rule->wait_for.operation == KEY_OP_UNSET)
+ err(rules->udev, "PHYSDEV* values are deprecated and will be removed from a future kernel, \n"
+ "please fix it in %s:%u", filename, lineno);
+
+ /* skip line if not any valid key was found */
+ if (!valid)
+ goto invalid;
+
+ /* grow buffer and add rule */
+ rule_size = sizeof(struct udev_rule) + rule->bufsize;
+ padding = (sizeof(size_t) - rule_size % sizeof(size_t)) % sizeof(size_t);
+ dbg(rules->udev, "add %zi padding bytes\n", padding);
+ rule_size += padding;
+ rule->bufsize += padding;
+
+ rules->buf = realloc(rules->buf, rules->bufsize + rule_size);
+ if (!rules->buf) {
+ err(rules->udev, "realloc failed\n");
+ goto exit;
+ }
+ dbg(rules->udev, "adding rule to offset %zi\n", rules->bufsize);
+ memcpy(rules->buf + rules->bufsize, rule, rule_size);
+ rules->bufsize += rule_size;
+exit:
+ 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;
+ char line[UTIL_LINE_SIZE];
+ size_t start;
+ struct udev_rule *rule;
+ struct udev_rules_iter iter;
+
+ start = rules->bufsize;
+ info(rules->udev, "reading '%s' as rules file\n", filename);
+
+ f = fopen(filename, "r");
+ if (f == NULL)
+ return -1;
+
+ while(fgets(line, sizeof(line), f) != NULL) {
+ int line_nr = 0;
+ 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_to_rules(rules, key, filename, line_nr);
+ }
+ fclose(f);
+
+ /* compute all goto targets within this file */
+ udev_rules_iter_init(&iter, rules);
+ udev_rules_iter_goto(&iter, start);
+ while((rule = udev_rules_iter_next(&iter))) {
+ if (rule->goto_label.operation != KEY_OP_UNSET) {
+ char *goto_label = &rule->buf[rule->goto_label.val_off];
+
+ dbg(rules->udev, "resolving goto label '%s'\n", goto_label);
+ rule->goto_rule_off = find_label(&iter, goto_label);
+ if (rule->goto_rule_off == 0) {
+ err(rules->udev, "ignore goto to nonexistent label '%s' in '%s'\n",
+ goto_label, filename);
+ rule->goto_rule_off = iter.current;
+ }
+ }
+ }
+ 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;
+
+ rules = malloc(sizeof(struct udev_rules));
+ if (rules == NULL)
+ return rules;
+ memset(rules, 0x00, sizeof(struct udev_rules));
+ rules->udev = udev;
+ rules->resolve_names = resolve_names;
+ udev_list_init(&file_list);
+
+ 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) {
+ 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);
+ }
+ return rules;
+}
+
+void udev_rules_unref(struct udev_rules *rules)
+{
+ if (rules == NULL)
+ return;
+ if (rules->buf) {
+ free(rules->buf);
+ rules->buf = NULL;
+ }
+ free(rules);
+}
~ianmdlvl / elogind.git / blobdiff