/*
* udev_rules.c
*
- * Userspace devfs
- *
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2003-2005 Kay Sievers <kay.sievers@vrfy.org>
*
- *
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2 of the License.
#include <ctype.h>
#include <unistd.h>
#include <errno.h>
+#include <syslog.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include "udev_rules.h"
#include "udev_db.h"
-static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, char *attr);
-
-/* compare string with pattern (supports * ? [0-9] [!A-Z]) */
-static int strcmp_pattern(const char *p, const char *s)
-{
- if (s[0] == '\0') {
- while (p[0] == '*')
- p++;
- return (p[0] != '\0');
- }
- switch (p[0]) {
- case '[':
- {
- int not = 0;
- p++;
- if (p[0] == '!') {
- not = 1;
- p++;
- }
- while ((p[0] != '\0') && (p[0] != ']')) {
- int match = 0;
- if (p[1] == '-') {
- if ((s[0] >= p[0]) && (s[0] <= p[2]))
- match = 1;
- p += 3;
- } else {
- match = (p[0] == s[0]);
- p++;
- }
- if (match ^ not) {
- while ((p[0] != '\0') && (p[0] != ']'))
- p++;
- if (p[0] == ']')
- return strcmp_pattern(p+1, s+1);
- }
- }
- }
- break;
- case '*':
- if (strcmp_pattern(p, s+1))
- return strcmp_pattern(p+1, s);
- return 0;
- case '\0':
- if (s[0] == '\0') {
- return 0;
- }
- break;
- default:
- if ((p[0] == s[0]) || (p[0] == '?'))
- return strcmp_pattern(p+1, s+1);
- break;
- }
- return 1;
-}
/* extract possible {attr} and move str behind it */
static char *get_format_attribute(char **str)
if (*str[0] == '{') {
pos = strchr(*str, '}');
if (pos == NULL) {
- dbg("missing closing brace for format");
+ err("missing closing brace for format");
return NULL;
}
pos[0] = '\0';
dbg("format length=%i", num);
return num;
} else {
- dbg("format parsing error '%s'", *str);
+ err("format parsing error '%s'", *str);
}
}
return -1;
}
-/** Finds the lowest positive N such that <name>N isn't present in
- * $(udevroot) either as a file or a symlink.
- *
- * @param name Name to check for
- * @return 0 if <name> didn't exist and N otherwise.
- */
-static int find_free_number(struct udevice *udev, const char *name)
+static int get_key(char **line, char **key, char **value)
{
- char devpath[PATH_SIZE];
+ char *linepos;
+ char *temp;
+
+ linepos = *line;
+ if (!linepos)
+ return -1;
+
+ if (strchr(linepos, '\\')) {
+ dbg("escaped characters are not supported, skip");
+ return -1;
+ }
+
+ /* skip whitespace */
+ while (isspace(linepos[0]))
+ linepos++;
+
+ /* get the key */
+ *key = linepos;
+ while (1) {
+ linepos++;
+ if (linepos[0] == '\0')
+ return -1;
+ if (isspace(linepos[0]))
+ break;
+ if (linepos[0] == '=')
+ break;
+ }
+
+ /* terminate key */
+ linepos[0] = '\0';
+ linepos++;
+
+ /* skip whitespace */
+ while (isspace(linepos[0]))
+ linepos++;
+
+ /* get the value*/
+ if (linepos[0] == '"') {
+ linepos++;
+ temp = strchr(linepos, '"');
+ if (!temp) {
+ dbg("missing closing quote");
+ return -1;
+ }
+ dbg("value is quoted");
+ temp[0] = '\0';
+ } else if (linepos[0] == '\'') {
+ linepos++;
+ temp = strchr(linepos, '\'');
+ if (!temp) {
+ dbg("missing closing quote");
+ return -1;
+ }
+ dbg("value is quoted");
+ temp[0] = '\0';
+ } else if (linepos[0] == '\0') {
+ dbg("value is empty");
+ } else {
+ temp = linepos;
+ while (temp[0] && !isspace(temp[0]))
+ temp++;
+ temp[0] = '\0';
+ }
+ *value = linepos;
+
+ return 0;
+}
+
+static int import_keys_into_env(struct udevice *udev, const char *buf, size_t bufsize)
+{
+ char line[LINE_SIZE];
+ const char *bufline;
+ char *linepos;
+ char *variable;
+ char *value;
+ size_t cur;
+ size_t count;
+ int lineno;
+
+ /* loop through the whole buffer */
+ lineno = 0;
+ cur = 0;
+ while (cur < bufsize) {
+ count = buf_get_line(buf, bufsize, cur);
+ bufline = &buf[cur];
+ cur += count+1;
+ lineno++;
+
+ if (count >= sizeof(line)) {
+ err("line too long, conf line skipped %s, line %d", udev_config_filename, lineno);
+ continue;
+ }
+
+ /* eat the whitespace */
+ while ((count > 0) && isspace(bufline[0])) {
+ bufline++;
+ count--;
+ }
+ if (count == 0)
+ continue;
+
+ /* see if this is a comment */
+ if (bufline[0] == COMMENT_CHARACTER)
+ continue;
+
+ memcpy(line, bufline, count);
+ line[count] = '\0';
+
+ linepos = line;
+ if (get_key(&linepos, &variable, &value) == 0) {
+ dbg("import '%s=%s'", variable, value);
+ name_list_key_add(&udev->env_list, variable, value);
+ setenv(variable, value, 1);
+ }
+ }
+
+ return 0;
+}
+
+static int import_file_into_env(struct udevice *udev, const char *filename)
+{
+ char *buf;
+ size_t bufsize;
+
+ if (file_map(filename, &buf, &bufsize) != 0) {
+ err("can't open '%s': %s", filename, strerror(errno));
+ return -1;
+ }
+ import_keys_into_env(udev, buf, bufsize);
+ file_unmap(buf, bufsize);
+
+ return 0;
+}
+
+static int import_program_into_env(struct udevice *udev, const char *program)
+{
+ char result[1024];
+ size_t reslen;
+
+ if (run_program(program, udev->subsystem, result, sizeof(result), &reslen, (udev_log_priority >= LOG_INFO)) != 0)
+ return -1;
+ return import_keys_into_env(udev, result, reslen);
+}
+
+static int import_parent_into_env(struct udevice *udev, struct sysfs_class_device *class_dev, const char *filter)
+{
+ struct sysfs_class_device *parent = sysfs_get_classdev_parent(class_dev);
+ int rc = -1;
+
+ if (parent != NULL) {
+ struct udevice udev_parent;
+ struct name_entry *name_loop;
+
+ dbg("found parent '%s', get the node name", parent->path);
+ udev_init_device(&udev_parent, NULL, NULL, NULL);
+ /* import the udev_db of the parent */
+ if (udev_db_get_device(&udev_parent, &parent->path[strlen(sysfs_path)]) == 0) {
+ dbg("import stored parent env '%s'", udev_parent.name);
+ list_for_each_entry(name_loop, &udev_parent.env_list, node) {
+ char name[NAME_SIZE];
+ char *pos;
+
+ strlcpy(name, name_loop->name, sizeof(name));
+ pos = strchr(name, '=');
+ if (pos) {
+ pos[0] = '\0';
+ pos++;
+ if (strcmp_pattern(filter, name) == 0) {
+ dbg("import key '%s'", name_loop->name);
+ name_list_add(&udev->env_list, name_loop->name, 0);
+ setenv(name, pos, 1);
+ } else
+ dbg("skip key '%s'", name_loop->name);
+ }
+ }
+ rc = 0;
+ } else
+ dbg("parent not found in database");
+ udev_cleanup_device(&udev_parent);
+ }
+
+ return rc;
+}
+
+static int match_name_and_get_number(const char *base, const char *devname)
+{
+ size_t baselen;
+ char *endptr;
+ int num;
+
+ baselen = strlen(base);
+ if (strncmp(base, devname, baselen) != 0)
+ return -1;
+ if (devname[baselen] == '\0')
+ return 0;
+ if (!isdigit(devname[baselen]))
+ return -1;
+ num = strtoul(&devname[baselen], &endptr, 10);
+ if (endptr[0] != '\0')
+ return -1;
+ return num;
+}
+
+/* finds the lowest positive device number such that <name>N isn't present in the udevdb
+ * if <name> doesn't exist, 0 is returned, N otherwise */
+static int find_free_number(const char *base, const char *devpath)
+{
+ char db_devpath[PATH_SIZE];
char filename[PATH_SIZE];
+ struct udevice udev_db;
int num = 0;
- strlcpy(filename, name, sizeof(filename));
+ /* check if the device already owns a matching name */
+ udev_init_device(&udev_db, NULL, NULL, NULL);
+ if (udev_db_get_device(&udev_db, devpath) == 0) {
+ struct name_entry *name_loop;
+ int devnum;
+
+ devnum = match_name_and_get_number(base, udev_db.name);
+ if (devnum >= 0) {
+ num = devnum;
+ dbg("device '%s', already has the node '%s' with num %u, use it", devpath, base, num);
+ goto out;
+ }
+ list_for_each_entry(name_loop, &udev_db.symlink_list, node) {
+ devnum = match_name_and_get_number(base, name_loop->name);
+ if (devnum >= 0) {
+ num = devnum;
+ dbg("device '%s', already has a symlink '%s' with num %u, use it", devpath, base, num);
+ goto out;
+ }
+ }
+ }
+
+ /* just search the database again and again until a free name is found */
+ strlcpy(filename, base, sizeof(filename));
while (1) {
dbg("look for existing node '%s'", filename);
- if (udev_db_search_name(devpath, sizeof(devpath), filename) != 0) {
+ if (udev_db_lookup_name(filename, db_devpath, sizeof(db_devpath)) != 0) {
dbg("free num=%d", num);
- return num;
+ break;
}
num++;
- if (num > 1000) {
- info("find_free_number gone crazy (num=%d), aborted", num);
- return -1;
+ if (num > 100000) {
+ err("find_free_number aborted at num=%d", num);
+ num = -1;
+ break;
}
- snprintf(filename, sizeof(filename), "%s%d", name, num);
+ snprintf(filename, sizeof(filename), "%s%d", base, num);
filename[sizeof(filename)-1] = '\0';
}
+
+out:
+ udev_cleanup_device(&udev_db);
+ return num;
+}
+
+static int find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device,
+ const char *name, char *value, size_t len)
+{
+ struct sysfs_class_device *class_dev_parent;
+ struct sysfs_attribute *tmpattr;
+
+ dbg("look for device attribute '%s'", name);
+ if (class_dev) {
+ dbg("look for class attribute '%s/%s'", class_dev->path, name);
+ tmpattr = sysfs_get_classdev_attr(class_dev, name);
+ if (tmpattr)
+ goto attr_found;
+ class_dev_parent = sysfs_get_classdev_parent(class_dev);
+ if (class_dev_parent) {
+ tmpattr = sysfs_get_classdev_attr(class_dev_parent, name);
+ if (tmpattr)
+ goto attr_found;
+ }
+ }
+ if (sysfs_device) {
+ dbg("look for devices attribute '%s/%s'", sysfs_device->path, name);
+ tmpattr = sysfs_get_device_attr(sysfs_device, name);
+ if (tmpattr)
+ goto attr_found;
+ }
+ return -1;
+
+attr_found:
+ strlcpy(value, tmpattr->value, len);
+ remove_trailing_chars(value, '\n');
+
+ dbg("found attribute '%s'", tmpattr->path);
+ return 0;
+}
+
+#define WAIT_LOOP_PER_SECOND 50
+static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
+{
+ char filename[PATH_SIZE];
+ struct stat stats;
+ int loop = timeout * WAIT_LOOP_PER_SECOND;
+
+ snprintf(filename, sizeof(filename), "%s%s/%s", sysfs_path, udev->devpath, file);
+ filename[sizeof(filename)-1] = '\0';
+ dbg("wait %i sec for '%s'", timeout, filename);
+
+ while (--loop) {
+ if (stat(filename, &stats) == 0) {
+ info("file appeared after %i loops", (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
+ return 0;
+ }
+ info("wait for %i mseconds", 1000 / WAIT_LOOP_PER_SECOND);
+ usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
+ }
+ err("waiting for '%s' failed", filename);
+ return -1;
}
static void apply_format(struct udevice *udev, char *string, size_t maxsize,
{
char temp[PATH_SIZE];
char temp2[PATH_SIZE];
- char *tail, *pos, *cpos, *attr, *rest;
+ char *head, *tail, *pos, *cpos, *attr, *rest;
int len;
int i;
- char c;
- struct sysfs_attribute *tmpattr;
+ int count;
unsigned int next_free_number;
struct sysfs_class_device *class_dev_parent;
-
- pos = string;
+ enum subst_type {
+ SUBST_UNKNOWN,
+ SUBST_DEVPATH,
+ SUBST_ID,
+ SUBST_KERNEL_NUMBER,
+ SUBST_KERNEL_NAME,
+ SUBST_MAJOR,
+ SUBST_MINOR,
+ SUBST_RESULT,
+ SUBST_SYSFS,
+ SUBST_ENUM,
+ SUBST_PARENT,
+ SUBST_TEMP_NODE,
+ SUBST_ROOT,
+ SUBST_MODALIAS,
+ SUBST_ENV,
+ };
+ static const struct subst_map {
+ char *name;
+ char fmt;
+ enum subst_type type;
+ } map[] = {
+ { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
+ { .name = "id", .fmt = 'b', .type = SUBST_ID },
+ { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
+ { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL_NAME },
+ { .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
+ { .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
+ { .name = "result", .fmt = 'c', .type = SUBST_RESULT },
+ { .name = "sysfs", .fmt = 's', .type = SUBST_SYSFS },
+ { .name = "enum", .fmt = 'e', .type = SUBST_ENUM },
+ { .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
+ { .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
+ { .name = "root", .fmt = 'r', .type = SUBST_ROOT },
+ { .name = "modalias", .fmt = 'A', .type = SUBST_MODALIAS },
+ { .name = "env", .fmt = 'E', .type = SUBST_ENV },
+ { NULL, '\0', 0 }
+ };
+ enum subst_type type;
+ const struct subst_map *subst;
+
+ head = string;
while (1) {
- pos = strchr(pos, '%');
- if (pos == NULL)
- break;
-
- pos[0] = '\0';
- tail = pos+1;
- len = get_format_len(&tail);
- c = tail[0];
- strlcpy(temp, tail+1, sizeof(temp));
- tail = temp;
- dbg("format=%c, string='%s', tail='%s'",c , string, tail);
+ len = -1;
+ while (head[0] != '\0') {
+ if (head[0] == '$') {
+ /* substitute named variable */
+ if (head[1] == '\0')
+ break;
+ if (head[1] == '$') {
+ strlcpy(temp, head+2, sizeof(temp));
+ 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("will substitute format name '%s'", subst->name);
+ goto found;
+ }
+ }
+ }
+ else if (head[0] == '%') {
+ /* substitute format char */
+ if (head[1] == '\0')
+ break;
+ if (head[1] == '%') {
+ strlcpy(temp, head+2, sizeof(temp));
+ strlcpy(head+1, temp, maxsize);
+ head++;
+ continue;
+ }
+ head[0] = '\0';
+ tail = head+1;
+ len = get_format_len(&tail);
+ for (subst = map; subst->name; subst++) {
+ if (tail[0] == subst->fmt) {
+ type = subst->type;
+ tail++;
+ dbg("will substitute format char '%c'", subst->fmt);
+ goto found;
+ }
+ }
+ }
+ head++;
+ }
+ break;
+found:
attr = get_format_attribute(&tail);
+ strlcpy(temp, tail, sizeof(temp));
+ dbg("format=%i, string='%s', tail='%s', class_dev=%p, sysfs_dev=%p",
+ type ,string, tail, class_dev, sysfs_device);
- switch (c) {
- case 'p':
+ switch (type) {
+ case SUBST_DEVPATH:
strlcat(string, udev->devpath, maxsize);
- dbg("substitute kernel name '%s'", udev->kernel_name);
+ dbg("substitute devpath '%s'", udev->devpath);
break;
- case 'b':
+ case SUBST_ID:
strlcat(string, udev->bus_id, maxsize);
dbg("substitute bus_id '%s'", udev->bus_id);
break;
- case 'k':
+ case SUBST_KERNEL_NAME:
strlcat(string, udev->kernel_name, maxsize);
dbg("substitute kernel name '%s'", udev->kernel_name);
break;
- case 'n':
+ case SUBST_KERNEL_NUMBER:
strlcat(string, udev->kernel_number, maxsize);
dbg("substitute kernel number '%s'", udev->kernel_number);
- break;
- case 'm':
- sprintf(temp2, "%d", minor(udev->devt));
- strlcat(string, temp2, maxsize);
- dbg("substitute minor number '%s'", temp2);
break;
- case 'M':
+ case SUBST_MAJOR:
sprintf(temp2, "%d", major(udev->devt));
strlcat(string, temp2, maxsize);
dbg("substitute major number '%s'", temp2);
break;
- case 'c':
+ case SUBST_MINOR:
+ sprintf(temp2, "%d", minor(udev->devt));
+ strlcat(string, temp2, maxsize);
+ dbg("substitute minor number '%s'", temp2);
+ break;
+ case SUBST_RESULT:
if (udev->program_result[0] == '\0')
break;
/* get part part of the result string */
cpos++;
}
if (i > 0) {
- dbg("requested part of result string not found");
+ err("requested part of result string not found");
break;
}
strlcpy(temp2, cpos, sizeof(temp2));
dbg("substitute result string '%s'", udev->program_result);
}
break;
- case 's':
- if (!class_dev)
- break;
+ case SUBST_SYSFS:
if (attr == NULL) {
dbg("missing attribute");
break;
}
- tmpattr = find_sysfs_attribute(class_dev, sysfs_device, attr);
- if (tmpattr == NULL) {
- dbg("sysfa attribute '%s' not found", attr);
- break;
- }
- /* strip trailing whitespace of matching value */
- if (isspace(tmpattr->value[strlen(tmpattr->value)-1])) {
- i = len = strlen(tmpattr->value);
- while (i > 0 && isspace(tmpattr->value[i-1]))
- i--;
- if (i < len) {
- tmpattr->value[i] = '\0';
- dbg("remove %i trailing whitespace chars from '%s'",
- len - i, tmpattr->value);
+ if (find_sysfs_attribute(class_dev, sysfs_device, attr, temp2, sizeof(temp2)) != 0) {
+ struct sysfs_device *parent_device;
+
+ dbg("sysfs attribute '%s' not found, walk up the physical devices", attr);
+ parent_device = sysfs_get_device_parent(sysfs_device);
+ while (parent_device) {
+ dbg("looking at '%s'", parent_device->path);
+ if (find_sysfs_attribute(NULL, parent_device, attr, temp2, sizeof(temp2)) == 0)
+ break;
+ parent_device = sysfs_get_device_parent(parent_device);
}
+ if (!parent_device)
+ break;
}
- strlcat(string, tmpattr->value, maxsize);
- dbg("substitute sysfs value '%s'", tmpattr->value);
- break;
- case '%':
- strlcat(string, "%", maxsize);
- pos++;
+ /* strip trailing whitespace of sysfs value */
+ i = strlen(temp2);
+ while (i > 0 && isspace(temp2[i-1]))
+ temp2[--i] = '\0';
+ count = replace_untrusted_chars(temp2);
+ if (count)
+ info("%i untrusted character(s) replaced" , count);
+ strlcat(string, temp2, maxsize);
+ dbg("substitute sysfs value '%s'", temp2);
break;
- case 'e':
- next_free_number = find_free_number(udev, string);
+ case SUBST_ENUM:
+ next_free_number = find_free_number(string, udev->devpath);
if (next_free_number > 0) {
sprintf(temp2, "%d", next_free_number);
strlcat(string, temp2, maxsize);
}
break;
- case 'P':
+ case SUBST_PARENT:
if (!class_dev)
break;
class_dev_parent = sysfs_get_classdev_parent(class_dev);
struct udevice udev_parent;
dbg("found parent '%s', get the node name", class_dev_parent->path);
- udev_init_device(&udev_parent, NULL, NULL);
+ udev_init_device(&udev_parent, NULL, NULL, NULL);
/* lookup the name in the udev_db with the DEVPATH of the parent */
if (udev_db_get_device(&udev_parent, &class_dev_parent->path[strlen(sysfs_path)]) == 0) {
strlcat(string, udev_parent.name, maxsize);
udev_cleanup_device(&udev_parent);
}
break;
- case 'N':
+ case SUBST_TEMP_NODE:
if (udev->tmp_node[0] == '\0') {
dbg("create temporary device node for callout");
snprintf(udev->tmp_node, sizeof(udev->tmp_node), "%s/.tmp-%u-%u",
strlcat(string, udev->tmp_node, maxsize);
dbg("substitute temporary device node name '%s'", udev->tmp_node);
break;
- case 'r':
+ case SUBST_ROOT:
strlcat(string, udev_root, maxsize);
dbg("substitute udev_root '%s'", udev_root);
break;
+ case SUBST_MODALIAS:
+ if (find_sysfs_attribute(NULL, sysfs_device, "modalias", temp2, sizeof(temp2)) != 0)
+ break;
+ strlcat(string, temp2, maxsize);
+ dbg("substitute MODALIAS '%s'", temp2);
+ break;
+ case SUBST_ENV:
+ if (attr == NULL) {
+ dbg("missing attribute");
+ break;
+ }
+ pos = getenv(attr);
+ if (pos == NULL) {
+ dbg("env '%s' not available", attr);
+ break;
+ }
+ dbg("substitute env '%s=%s'", attr, pos);
+ strlcat(string, pos, maxsize);
+ break;
default:
- dbg("unknown substitution type '%%%c'", c);
+ err("unknown substitution type=%i", type);
break;
}
- /* truncate to specified length */
- if (len > 0)
- pos[len] = '\0';
-
- strlcat(string, tail, maxsize);
+ /* possibly truncate to format-char specified length */
+ if (len != -1) {
+ head[len] = '\0';
+ dbg("truncate to %i chars, subtitution string becomes '%s'", len, head);
+ }
+ strlcat(string, temp, maxsize);
}
}
-static int execute_program(struct udevice *udev, const char *path, char *value, int len)
+static char *key_val(struct udev_rule *rule, struct key *key)
{
- int retval;
- int count;
- int status;
- int fds[2];
- pid_t pid;
- char *pos;
- char arg[PATH_SIZE];
- char *argv[(sizeof(arg) / 2) + 1];
- int i;
+ return rule->buf + key->val_off;
+}
- strlcpy(arg, path, sizeof(arg));
- i = 0;
- if (strchr(path, ' ')) {
- pos = arg;
- while (pos != NULL) {
- if (pos[0] == '\'') {
- /* don't separate if in apostrophes */
- pos++;
- argv[i] = strsep(&pos, "\'");
- while (pos && pos[0] == ' ')
- pos++;
- } else {
- argv[i] = strsep(&pos, " ");
- }
- dbg("arg[%i] '%s'", i, argv[i]);
- i++;
- }
- argv[i] = NULL;
- dbg("execute '%s' with parsed arguments", arg);
- } else {
- argv[0] = arg;
- argv[1] = udev->subsystem;
- argv[2] = NULL;
- dbg("execute '%s' with subsystem '%s' argument", arg, argv[1]);
- }
+static char *key_pair_name(struct udev_rule *rule, struct key_pair *pair)
+{
+ return rule->buf + pair->key_name_off;
+}
- retval = pipe(fds);
- if (retval != 0) {
- dbg("pipe failed");
- return -1;
- }
+static int match_key(const char *key_name, struct udev_rule *rule, struct key *key, const char *val)
+{
+ int match;
+ char value[PATH_SIZE];
+ char *key_value;
+ char *pos;
- pid = fork();
- switch(pid) {
- case 0:
- /* child */
- /* dup2 write side of pipe to STDOUT */
- dup2(fds[1], STDOUT_FILENO);
- retval = execv(arg, argv);
-
- info(KEY_PROGRAM " execution of '%s' failed", path);
- exit(1);
- case -1:
- dbg("fork failed");
- return -1;
- default:
- /* parent reads from fds[0] */
- close(fds[1]);
- retval = 0;
- i = 0;
- while (1) {
- count = read(fds[0], value + i, len - i-1);
- if (count <= 0)
- break;
+ if (key->operation == KEY_OP_UNSET)
+ return 0;
- i += count;
- if (i >= len-1) {
- dbg("result len %d too short", len);
- retval = -1;
- break;
- }
- }
+ strlcpy(value, rule->buf + key->val_off, sizeof(value));
+ key_value = value;
- if (count < 0) {
- dbg("read failed with '%s'", strerror(errno));
- retval = -1;
+ dbg("key %s value='%s'", key_name, key_value);
+ while (key_value) {
+ pos = strchr(key_value, '|');
+ if (pos) {
+ pos[0] = '\0';
+ pos++;
}
-
- if (i > 0 && value[i-1] == '\n')
- i--;
- value[i] = '\0';
- dbg("result is '%s'", value);
-
- close(fds[0]);
- waitpid(pid, &status, 0);
-
- if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
- dbg("exec program status 0x%x", status);
- retval = -1;
+ dbg("match %s '%s' <-> '%s'", key_name, key_value, val);
+ match = (strcmp_pattern(key_value, val) == 0);
+ if (match && (key->operation != KEY_OP_NOMATCH)) {
+ dbg("%s is true (matching value)", key_name);
+ return 0;
+ }
+ if (!match && (key->operation == KEY_OP_NOMATCH)) {
+ dbg("%s is true (non-matching value)", key_name);
+ return 0;
}
+ key_value = pos;
}
- return retval;
+ dbg("%s is false", key_name);
+ return -1;
}
-static struct sysfs_attribute *find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, char *attr)
+/* match a single rule against a given device and possibly its parent devices */
+static int match_rule(struct udevice *udev, struct udev_rule *rule,
+ struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
{
- struct sysfs_attribute *tmpattr = NULL;
- char *c;
-
- dbg("look for device attribute '%s'", attr);
- /* try to find the attribute in the class device directory */
- tmpattr = sysfs_get_classdev_attr(class_dev, attr);
- if (tmpattr)
- goto attr_found;
-
- /* look in the class device directory if present */
- if (sysfs_device) {
- tmpattr = sysfs_get_device_attr(sysfs_device, attr);
- if (tmpattr)
- goto attr_found;
- }
+ struct sysfs_device *parent_device = sysfs_device;
+ int i;
- return NULL;
+ if (match_key("ACTION", rule, &rule->action, udev->action))
+ goto exit;
-attr_found:
- c = strchr(tmpattr->value, '\n');
- if (c != NULL)
- c[0] = '\0';
+ if (match_key("KERNEL", rule, &rule->kernel_name, udev->kernel_name))
+ goto exit;
- dbg("found attribute '%s'", tmpattr->path);
- return tmpattr;
-}
+ if (match_key("SUBSYSTEM", rule, &rule->subsystem, udev->subsystem))
+ goto exit;
-static int compare_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device, struct key_pair *pair)
-{
- struct sysfs_attribute *tmpattr;
- int i;
- int len;
-
- if ((pair == NULL) || (pair->name[0] == '\0') || (pair->value == '\0'))
- return -ENODEV;
+ if (match_key("DEVPATH", rule, &rule->devpath, udev->devpath))
+ goto exit;
- tmpattr = find_sysfs_attribute(class_dev, sysfs_device, pair->name);
- if (tmpattr == NULL)
- return -ENODEV;
+ if (rule->modalias.operation != KEY_OP_UNSET) {
+ char value[NAME_SIZE];
- /* strip trailing whitespace of value, if not asked to match for it */
- if (! isspace(pair->value[strlen(pair->value)-1])) {
- i = len = strlen(tmpattr->value);
- while (i > 0 && isspace(tmpattr->value[i-1]))
- i--;
- if (i < len) {
- tmpattr->value[i] = '\0';
- dbg("remove %i trailing whitespace chars from '%s'",
- len - i, tmpattr->value);
+ if (find_sysfs_attribute(NULL, sysfs_device, "modalias", value, sizeof(value)) != 0) {
+ dbg("MODALIAS value not found");
+ goto exit;
}
+ if (match_key("MODALIAS", rule, &rule->modalias, value))
+ goto exit;
}
- dbg("compare attribute '%s' value '%s' with '%s'",
- pair->name, tmpattr->value, pair->value);
- if (strcmp_pattern(pair->value, tmpattr->value) != 0)
- return -ENODEV;
+ for (i = 0; i < rule->env.count; i++) {
+ struct key_pair *pair = &rule->env.keys[i];
- dbg("found matching attribute '%s' with value '%s'",
- pair->name, pair->value);
- return 0;
-}
+ /* we only check for matches, assignments will be handled later */
+ if (pair->key.operation != KEY_OP_ASSIGN) {
+ const char *key_name = key_pair_name(rule, pair);
+ const char *value = getenv(key_name);
-static int match_rule(struct udevice *udev, struct udev_rule *rule,
- struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
-{
- if (rule->kernel[0] != '\0') {
- dbg("check for " KEY_KERNEL " rule->kernel='%s' class_dev->name='%s'",
- rule->kernel, class_dev->name);
- if (strcmp_pattern(rule->kernel, class_dev->name) != 0) {
- dbg(KEY_KERNEL " is not matching");
- if (rule->kernel_operation != KEY_OP_NOMATCH)
- goto exit;
- } else {
- dbg(KEY_KERNEL " matches");
- if (rule->kernel_operation == KEY_OP_NOMATCH)
- goto exit;
- }
- dbg(KEY_KERNEL " key is true");
- }
-
- if (rule->subsystem[0] != '\0') {
- dbg("check for " KEY_SUBSYSTEM " rule->subsystem='%s' class_dev->name='%s'",
- rule->subsystem, class_dev->name);
- if (strcmp_pattern(rule->subsystem, udev->subsystem) != 0) {
- dbg(KEY_SUBSYSTEM " is not matching");
- if (rule->subsystem_operation != KEY_OP_NOMATCH)
- goto exit;
- } else {
- dbg(KEY_SUBSYSTEM " matches");
- if (rule->subsystem_operation == KEY_OP_NOMATCH)
+ if (!value) {
+ dbg("ENV{'%s'} is not set, treat as empty", key_name);
+ value = "";
+ }
+ if (match_key("ENV", rule, &pair->key, value))
goto exit;
}
- dbg(KEY_SUBSYSTEM " key is true");
}
- if (rule->env_pair_count) {
- int i;
-
- dbg("check for " KEY_ENV " pairs");
- for (i = 0; i < rule->env_pair_count; i++) {
- struct key_pair *pair;
- const char *value;
+ if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) {
+ int match;
- pair = &rule->env_pair[i];
- value = getenv(pair->name);
- if (!value) {
- dbg(KEY_ENV "{'%s'} is not found", pair->name);
- goto exit;
- }
- if (strcmp_pattern(pair->value, value) != 0) {
- dbg(KEY_ENV "{'%s'} is not matching", pair->name);
- if (pair->operation != KEY_OP_NOMATCH)
- goto exit;
- } else {
- dbg(KEY_ENV "{'%s'} matches", pair->name);
- if (pair->operation == KEY_OP_NOMATCH)
- goto exit;
- }
+ match = (wait_for_sysfs(udev, key_val(rule, &rule->wait_for_sysfs), 3) == 0);
+ if (match && (rule->wait_for_sysfs.operation != KEY_OP_NOMATCH)) {
+ dbg("WAIT_FOR_SYSFS is true (matching value)");
+ return 0;
+ }
+ if (!match && (rule->wait_for_sysfs.operation == KEY_OP_NOMATCH)) {
+ dbg("WAIT_FOR_SYSFS is true, (non matching value)");
+ return 0;
}
- dbg(KEY_ENV " key is true");
+ dbg("WAIT_FOR_SYSFS is false");
+ return -1;
}
/* walk up the chain of physical devices and find a match */
while (1) {
/* check for matching driver */
- if (rule->driver[0] != '\0') {
- if (sysfs_device == NULL) {
+ if (rule->driver.operation != KEY_OP_UNSET) {
+ if (parent_device == NULL) {
dbg("device has no sysfs_device");
- goto try_parent;
- }
- dbg("check for " KEY_DRIVER " rule->driver='%s' sysfs_device->driver_name='%s'",
- rule->driver, sysfs_device->driver_name);
- if (strcmp_pattern(rule->driver, sysfs_device->driver_name) != 0) {
- dbg(KEY_DRIVER " is not matching");
- if (rule->driver_operation != KEY_OP_NOMATCH)
- goto try_parent;
- } else {
- dbg(KEY_DRIVER " matches");
- if (rule->driver_operation == KEY_OP_NOMATCH)
- goto try_parent;
+ goto exit;
}
- dbg(KEY_DRIVER " key is true");
+ if (match_key("DRIVER", rule, &rule->driver, parent_device->driver_name))
+ goto try_parent;
}
/* check for matching bus value */
- if (rule->bus[0] != '\0') {
- if (sysfs_device == NULL) {
+ if (rule->bus.operation != KEY_OP_UNSET) {
+ if (parent_device == NULL) {
dbg("device has no sysfs_device");
- goto try_parent;
- }
- dbg("check for " KEY_BUS " rule->bus='%s' sysfs_device->bus='%s'",
- rule->bus, sysfs_device->bus);
- if (strcmp_pattern(rule->bus, sysfs_device->bus) != 0) {
- dbg(KEY_BUS " is not matching");
- if (rule->bus_operation != KEY_OP_NOMATCH)
- goto try_parent;
- } else {
- dbg(KEY_BUS " matches");
- if (rule->bus_operation == KEY_OP_NOMATCH)
- goto try_parent;
+ goto exit;
}
- dbg(KEY_BUS " key is true");
+ if (match_key("BUS", rule, &rule->bus, parent_device->bus))
+ goto try_parent;
}
/* check for matching bus id */
- if (rule->id[0] != '\0') {
- if (sysfs_device == NULL) {
+ if (rule->id.operation != KEY_OP_UNSET) {
+ if (parent_device == NULL) {
dbg("device has no sysfs_device");
- goto try_parent;
- }
- dbg("check " KEY_ID);
- if (strcmp_pattern(rule->id, sysfs_device->bus_id) != 0) {
- dbg(KEY_ID " is not matching");
- if (rule->id_operation != KEY_OP_NOMATCH)
- goto try_parent;
- } else {
- dbg(KEY_ID " matches");
- if (rule->id_operation == KEY_OP_NOMATCH)
- goto try_parent;
+ goto exit;
}
- dbg(KEY_ID " key is true");
+ if (match_key("ID", rule, &rule->id, parent_device->bus_id))
+ goto try_parent;
}
/* check for matching sysfs pairs */
- if (rule->sysfs_pair_count) {
- int i;
-
- dbg("check " KEY_SYSFS " pairs");
- for (i = 0; i < rule->sysfs_pair_count; i++) {
- struct key_pair *pair;
-
- pair = &rule->sysfs_pair[i];
- if (compare_sysfs_attribute(class_dev, sysfs_device, pair) != 0) {
- dbg(KEY_SYSFS "{'%s'} is not matching", pair->name);
- if (pair->operation != KEY_OP_NOMATCH)
- goto try_parent;
- } else {
- dbg(KEY_SYSFS "{'%s'} matches", pair->name);
- if (pair->operation == KEY_OP_NOMATCH)
- goto try_parent;
+ if (rule->sysfs.count) {
+ dbg("check %i SYSFS keys", rule->sysfs.count);
+ for (i = 0; i < rule->sysfs.count; i++) {
+ struct key_pair *pair = &rule->sysfs.keys[i];
+ const char *key_name = key_pair_name(rule, pair);
+ const char *key_value = key_val(rule, &pair->key);
+ char value[VALUE_SIZE];
+ size_t len;
+
+ if (find_sysfs_attribute(class_dev, parent_device, key_name, value, sizeof(value)) != 0)
+ goto try_parent;
+
+ /* strip trailing whitespace of value, if not asked to match for it */
+ len = strlen(key_value);
+ if (len && !isspace(key_value[len-1])) {
+ len = strlen(value);
+ while (len > 0 && isspace(value[len-1]))
+ value[--len] = '\0';
+ dbg("removed %zi trailing whitespace chars from '%s'", strlen(value)-len, value);
}
+
+ if (match_key("SYSFS", rule, &pair->key, value))
+ goto try_parent;
}
- dbg(KEY_SYSFS " keys are true");
+ dbg("all %i SYSFS keys matched", rule->sysfs.count);
}
/* found matching physical device */
break;
try_parent:
dbg("try parent sysfs device");
- sysfs_device = sysfs_get_device_parent(sysfs_device);
- if (sysfs_device == NULL)
+ parent_device = sysfs_get_device_parent(parent_device);
+ if (parent_device == NULL)
goto exit;
- dbg("sysfs_device->path='%s'", sysfs_device->path);
- dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
+ dbg("look at sysfs_device->path='%s'", parent_device->path);
+ dbg("look at sysfs_device->bus_id='%s'", parent_device->bus_id);
}
/* execute external program */
- if (rule->program[0] != '\0') {
+ if (rule->program.operation != KEY_OP_UNSET) {
char program[PATH_SIZE];
+ char result[PATH_SIZE];
- dbg("check " KEY_PROGRAM);
- strlcpy(program, rule->program, sizeof(program));
+ strlcpy(program, key_val(rule, &rule->program), sizeof(program));
apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
- if (execute_program(udev, program, udev->program_result, sizeof(udev->program_result)) != 0) {
- dbg(KEY_PROGRAM " returned nonzero");
- if (rule->program_operation != KEY_OP_NOMATCH)
+ if (run_program(program, udev->subsystem, result, sizeof(result), NULL, (udev_log_priority >= LOG_INFO)) != 0) {
+ dbg("PROGRAM is false");
+ udev->program_result[0] = '\0';
+ if (rule->program.operation != KEY_OP_NOMATCH)
goto exit;
} else {
- dbg(KEY_PROGRAM " returned successful");
- if (rule->program_operation == KEY_OP_NOMATCH)
+ int count;
+
+ dbg("PROGRAM matches");
+ remove_trailing_chars(result, '\n');
+ count = replace_untrusted_chars(result);
+ if (count)
+ info("%i untrusted character(s) replaced" , count);
+ dbg("result is '%s'", result);
+ strlcpy(udev->program_result, result, sizeof(udev->program_result));
+ dbg("PROGRAM returned successful");
+ if (rule->program.operation == KEY_OP_NOMATCH)
goto exit;
}
- dbg(KEY_PROGRAM " key is true");
+ dbg("PROGRAM key is true");
}
/* check for matching result of external program */
- if (rule->result[0] != '\0') {
- dbg("check for " KEY_RESULT " rule->result='%s', udev->program_result='%s'",
- rule->result, udev->program_result);
- if (strcmp_pattern(rule->result, udev->program_result) != 0) {
- dbg(KEY_RESULT " is not matching");
- if (rule->result_operation != KEY_OP_NOMATCH)
- goto exit;
- } else {
- dbg(KEY_RESULT " matches");
- if (rule->result_operation == KEY_OP_NOMATCH)
+ if (match_key("RESULT", rule, &rule->result, udev->program_result))
+ goto exit;
+
+ /* import variables returned from program or or file into environment */
+ if (rule->import.operation != KEY_OP_UNSET) {
+ char import[PATH_SIZE];
+ int rc = -1;
+
+ strlcpy(import, key_val(rule, &rule->import), sizeof(import));
+ apply_format(udev, import, sizeof(import), class_dev, sysfs_device);
+ dbg("check for IMPORT import='%s'", import);
+ if (rule->import_type == IMPORT_PROGRAM) {
+ rc = import_program_into_env(udev, import);
+ } else if (rule->import_type == IMPORT_FILE) {
+ dbg("import file import='%s'", import);
+ rc = import_file_into_env(udev, import);
+ } else if (rule->import_type == IMPORT_PARENT && class_dev) {
+ dbg("import parent import='%s'", import);
+ rc = import_parent_into_env(udev, class_dev, import);
+ }
+ if (rc) {
+ dbg("IMPORT failed");
+ if (rule->import.operation != KEY_OP_NOMATCH)
goto exit;
+ } else
+ dbg("IMPORT '%s' imported", key_val(rule, &rule->import));
+ dbg("IMPORT key is true");
+ }
+
+ /* rule matches, if we have ENV assignments export it */
+ for (i = 0; i < rule->env.count; i++) {
+ struct key_pair *pair = &rule->env.keys[i];
+
+ if (pair->key.operation == KEY_OP_ASSIGN) {
+ const char *key_name = key_pair_name(rule, pair);
+ const char *value = key_val(rule, &pair->key);
+
+ name_list_key_add(&udev->env_list, key_name, value);
+ setenv(key_name, value, 1);
+ dbg("export ENV '%s=%s'", key_name, value);
}
- dbg(KEY_RESULT " key is true");
}
- /* rule matches */
return 0;
exit:
return -1;
}
-int udev_rules_get_name(struct udevice *udev, struct sysfs_class_device *class_dev)
+int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct sysfs_class_device *class_dev)
{
struct sysfs_class_device *class_dev_parent;
struct sysfs_device *sysfs_device = NULL;
struct udev_rule *rule;
+ int name_set = 0;
dbg("class_dev->name='%s'", class_dev->name);
dbg("udev->kernel_name='%s'", udev->kernel_name);
/* look for a matching rule to apply */
- list_for_each_entry(rule, &udev_rule_list, node) {
+ udev_rules_iter_init(rules);
+ while (1) {
+ rule = udev_rules_iter_next(rules);
+ if (rule == NULL)
+ break;
+
+ if (name_set && rule->name.operation != KEY_OP_UNSET) {
+ dbg("node name already set, rule ignored");
+ continue;
+ }
+
dbg("process rule");
if (match_rule(udev, rule, class_dev, sysfs_device) == 0) {
-
/* apply options */
if (rule->ignore_device) {
- info("configured rule in '%s[%i]' applied, '%s' is ignored",
- rule->config_file, rule->config_line, udev->kernel_name);
- return -1;
+ info("rule applied, '%s' is ignored", udev->kernel_name);
+ udev->ignore_device = 1;
+ return 0;
}
if (rule->ignore_remove) {
udev->ignore_remove = 1;
}
/* apply permissions */
- if (rule->mode != 0000) {
+ if (!udev->mode_final && rule->mode != 0000) {
+ if (rule->mode_operation == KEY_OP_ASSIGN_FINAL)
+ udev->mode_final = 1;
udev->mode = rule->mode;
- dbg("applied mode=%#o to '%s'", udev->mode, udev->kernel_name);
+ dbg("applied mode=%#o to '%s'", rule->mode, udev->kernel_name);
}
- if (rule->owner[0] != '\0') {
- strlcpy(udev->owner, rule->owner, sizeof(udev->owner));
+ if (!udev->owner_final && rule->owner.operation != KEY_OP_UNSET) {
+ if (rule->owner.operation == KEY_OP_ASSIGN_FINAL)
+ udev->owner_final = 1;
+ strlcpy(udev->owner, key_val(rule, &rule->owner), sizeof(udev->owner));
apply_format(udev, udev->owner, sizeof(udev->owner), class_dev, sysfs_device);
dbg("applied owner='%s' to '%s'", udev->owner, udev->kernel_name);
}
- if (rule->group[0] != '\0') {
- strlcpy(udev->group, rule->group, sizeof(udev->group));
+ if (!udev->group_final && rule->group.operation != KEY_OP_UNSET) {
+ if (rule->group.operation == KEY_OP_ASSIGN_FINAL)
+ udev->group_final = 1;
+ strlcpy(udev->group, key_val(rule, &rule->group), sizeof(udev->group));
apply_format(udev, udev->group, sizeof(udev->group), class_dev, sysfs_device);
dbg("applied group='%s' to '%s'", udev->group, udev->kernel_name);
}
/* collect symlinks */
- if (rule->symlink[0] != '\0') {
+ if (!udev->symlink_final && rule->symlink.operation != KEY_OP_UNSET) {
char temp[PATH_SIZE];
char *pos, *next;
+ int count;
- info("configured rule in '%s[%i]' applied, added symlink '%s'",
- rule->config_file, rule->config_line, rule->symlink);
- strlcpy(temp, rule->symlink, sizeof(temp));
+ if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL)
+ udev->symlink_final = 1;
+ if (rule->symlink.operation == KEY_OP_ASSIGN || rule->symlink.operation == KEY_OP_ASSIGN_FINAL) {
+ info("reset symlink list");
+ name_list_cleanup(&udev->symlink_list);
+ }
+ strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp));
apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device);
+ count = replace_untrusted_chars(temp);
+ if (count)
+ info("%i untrusted character(s) replaced" , count);
+ dbg("rule applied, added symlink(s) '%s'", temp);
/* add multiple symlinks separated by spaces */
pos = temp;
- next = strchr(temp, ' ');
+ while (isspace(pos[0]))
+ pos++;
+ next = strchr(pos, ' ');
while (next) {
next[0] = '\0';
- dbg("add symlink '%s'", pos);
+ info("add symlink '%s'", pos);
name_list_add(&udev->symlink_list, pos, 0);
+ while (isspace(next[1]))
+ next++;
pos = &next[1];
next = strchr(pos, ' ');
}
- dbg("add symlink '%s'", pos);
- name_list_add(&udev->symlink_list, pos, 0);
+ if (pos[0] != '\0') {
+ info("add symlink '%s'", pos);
+ name_list_add(&udev->symlink_list, pos, 0);
+ }
}
- /* rule matches */
- if (rule->name[0] != '\0') {
- info("configured rule in '%s[%i]' applied, '%s' becomes '%s'",
- rule->config_file, rule->config_line, udev->kernel_name, rule->name);
-
- strlcpy(udev->name, rule->name, sizeof(udev->name));
+ /* set name, later rules with name set will be ignored */
+ if (rule->name.operation != KEY_OP_UNSET) {
+ int count;
+ name_set = 1;
+ strlcpy(udev->name, key_val(rule, &rule->name), sizeof(udev->name));
apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device);
- strlcpy(udev->config_file, rule->config_file, sizeof(udev->config_file));
- udev->config_line = rule->config_line;
+ count = replace_untrusted_chars(udev->name);
+ if (count)
+ info("%i untrusted character(s) replaced", count);
+ info("rule applied, '%s' becomes '%s'", udev->kernel_name, udev->name);
if (udev->type != DEV_NET)
dbg("name, '%s' is going to have owner='%s', group='%s', mode=%#o partitions=%i",
udev->name, udev->owner, udev->group, udev->mode, udev->partitions);
+ }
- break;
+ if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
+ char program[PATH_SIZE];
+
+ if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
+ udev->run_final = 1;
+ if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
+ info("reset run list");
+ name_list_cleanup(&udev->run_list);
+ }
+ strlcpy(program, key_val(rule, &rule->run), sizeof(program));
+ apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
+ dbg("add run '%s'", program);
+ name_list_add(&udev->run_list, program, 0);
}
if (rule->last_rule) {
break;
}
+ if (rule->goto_label.operation != KEY_OP_UNSET) {
+ dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label));
+ udev_rules_iter_label(rules, key_val(rule, &rule->goto_label));
+ }
}
}
- if (udev->name[0] == '\0') {
- /* no rule matched, so we use the kernel name */
+ if (!name_set) {
strlcpy(udev->name, udev->kernel_name, sizeof(udev->name));
- dbg("no rule found, use kernel name '%s'", udev->name);
+ info("no node name set, will use kernel name '%s'", udev->name);
}
if (udev->tmp_node[0] != '\0') {
return 0;
}
+
+int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev,
+ struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_dev)
+{
+ struct udev_rule *rule;
+
+ if (class_dev && !sysfs_dev)
+ sysfs_dev = sysfs_get_classdev_device(class_dev);
+ if (sysfs_dev) {
+ dbg("found devices device: path='%s', bus_id='%s', bus='%s'",
+ sysfs_dev->path, sysfs_dev->bus_id, sysfs_dev->bus);
+ strlcpy(udev->bus_id, sysfs_dev->bus_id, sizeof(udev->bus_id));
+ }
+
+ dbg("udev->kernel_name='%s'", udev->kernel_name);
+
+ /* look for a matching rule to apply */
+ udev_rules_iter_init(rules);
+ while (1) {
+ rule = udev_rules_iter_next(rules);
+ if (rule == NULL)
+ break;
+
+ dbg("process rule");
+ if (rule->name.operation != KEY_OP_UNSET || rule->symlink.operation != KEY_OP_UNSET ||
+ rule->mode_operation != KEY_OP_UNSET || rule->owner.operation != KEY_OP_UNSET || rule->group.operation != KEY_OP_UNSET) {
+ dbg("skip rule that names a device");
+ continue;
+ }
+
+ if (match_rule(udev, rule, class_dev, sysfs_dev) == 0) {
+ if (rule->ignore_device) {
+ info("rule applied, '%s' is ignored", udev->kernel_name);
+ udev->ignore_device = 1;
+ return 0;
+ }
+
+ if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
+ char program[PATH_SIZE];
+
+ if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
+ info("reset run list");
+ name_list_cleanup(&udev->run_list);
+ }
+ strlcpy(program, key_val(rule, &rule->run), sizeof(program));
+ apply_format(udev, program, sizeof(program), class_dev, sysfs_dev);
+ dbg("add run '%s'", program);
+ name_list_add(&udev->run_list, program, 0);
+ if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
+ break;
+ }
+
+ if (rule->last_rule) {
+ dbg("last rule to be applied");
+ break;
+ }
+
+ if (rule->goto_label.operation != KEY_OP_UNSET) {
+ dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label));
+ udev_rules_iter_label(rules, key_val(rule, &rule->goto_label));
+ }
+ }
+ }
+
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff