#include <ctype.h>
#include <unistd.h>
#include <errno.h>
+#include <time.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include "list.h"
#include "udev.h"
#include "udev_version.h"
+#include "logging.h"
#include "namedev.h"
#include "libsysfs/libsysfs.h"
#include "klibc_fixups.h"
/* compare string with pattern (supports * ? [0-9] [!A-Z]) */
static int strcmp_pattern(const char *p, const char *s)
{
- if (*s == '\0') {
- while (*p == '*')
+ if (s[0] == '\0') {
+ while (p[0] == '*')
p++;
- return (*p != '\0');
+ return (p[0] != '\0');
}
- switch (*p) {
+ switch (p[0]) {
case '[':
{
int not = 0;
p++;
- if (*p == '!') {
+ if (p[0] == '!') {
not = 1;
p++;
}
- while (*p && (*p != ']')) {
+ while ((p[0] != '\0') && (p[0] != ']')) {
int match = 0;
if (p[1] == '-') {
- if ((*s >= *p) && (*s <= p[2]))
+ if ((s[0] >= p[0]) && (s[0] <= p[2]))
match = 1;
p += 3;
} else {
- match = (*p == *s);
+ match = (p[0] == s[0]);
p++;
}
if (match ^ not) {
- while (*p && (*p != ']'))
+ while ((p[0] != '\0') && (p[0] != ']'))
p++;
- return strcmp_pattern(p+1, s+1);
+ if (p[0] == ']')
+ return strcmp_pattern(p+1, s+1);
}
}
}
return strcmp_pattern(p+1, s);
return 0;
case '\0':
- if (*s == '\0') {
+ if (s[0] == '\0') {
return 0;
}
break;
default:
- if ((*p == *s) || (*p == '?'))
+ if ((p[0] == s[0]) || (p[0] == '?'))
return strcmp_pattern(p+1, s+1);
break;
}
return NULL;
}
-static mode_t get_default_mode(struct sysfs_class_device *class_dev)
+static mode_t get_default_mode(void)
{
mode_t mode = 0600; /* default to owner rw only */
- if (strlen(default_mode_str) != 0) {
+ if (strlen(default_mode_str) != 0)
mode = strtol(default_mode_str, NULL, 8);
- }
+
return mode;
}
+static char *get_default_owner(void)
+{
+ if (strlen(default_owner_str) == 0)
+ strncpy(default_owner_str, "root", OWNER_SIZE);
+
+ return default_owner_str;
+}
+
+static char *get_default_group(void)
+{
+ if (strlen(default_group_str) == 0)
+ strncpy(default_group_str, "root", GROUP_SIZE);
+
+ return default_group_str;
+}
+
static void apply_format(struct udevice *udev, unsigned char *string)
{
char temp[NAME_SIZE];
strcat(pos, udev->kernel_number);
dbg("substitute kernel number '%s'", udev->kernel_number);
break;
- case 'D':
- if (strlen(udev->kernel_number) == 0) {
- strcat(pos, "disc");
- dbg("substitute devfs disc");
- break;
- }
- strcat(pos, "part");
- strcat(pos, udev->kernel_number);
- dbg("substitute devfs part '%s'", udev->kernel_number);
- break;
case 'm':
sprintf(pos, "%u", udev->minor);
dbg("substitute minor number '%u'", udev->minor);
/* sleep to give the kernel a chance to create the file */
sleep(1);
}
- dbg("Timed out waiting for '%s' file, continuing on anyway...", b->file);
+ dbg("timed out waiting for '%s' file, continuing on anyway...", b->file);
goto exit;
}
b++;
}
- dbg("Did not find bus type '%s' on list of bus_id_files, contact greg@kroah.com", sysfs_device->bus);
+ dbg("did not find bus type '%s' on list of bus_id_files, contact greg@kroah.com", sysfs_device->bus);
exit:
return; /* here to prevent compiler warning... */
}
+static void fix_kernel_name(struct udevice *udev)
+{
+ char *temp = udev->kernel_name;
+
+ while (*temp != 0x00) {
+ /* Some block devices have a ! in their name,
+ * we need to change that to / */
+ if (*temp == '!')
+ *temp = '/';
+ ++temp;
+ }
+}
+
static int execute_program(char *path, char *value, int len)
{
int retval;
return -1;
}
pid = fork();
- if (pid == -1) {
- dbg("fork failed");
- return -1;
- }
-
- if (pid == 0) {
+ switch(pid) {
+ case 0:
/* child */
close(STDOUT_FILENO);
dup(fds[1]); /* dup write side of pipe to STDOUT */
dbg("too many args - %d", i);
args[i] = NULL;
}
- retval = execve(args[0], args, main_envp);
+ retval = execv(args[0], args);
} else {
- retval = execve(path, main_argv, main_envp);
+ retval = execv(path, main_argv);
}
- if (retval != 0) {
- dbg("child execve failed");
- exit(1);
- }
- return -1; /* avoid compiler warning */
- } else {
+ dbg("child execve failed");
+ exit(1);
+ case -1:
+ dbg("fork failed");
+ return -1;
+ default:
/* parent reads from fds[0] */
close(fds[1]);
retval = 0;
static int match_id(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
{
char path[SYSFS_PATH_MAX];
- int found;
char *temp = NULL;
/* we have to have a sysfs device for ID to work */
if (!sysfs_device)
return -ENODEV;
- found = 0;
strfieldcpy(path, sysfs_device->path);
temp = strrchr(path, '/');
+ temp++;
dbg("search '%s' in '%s', path='%s'", dev->id, temp, path);
- if (strstr(temp, dev->id) != NULL) {
- found = 1;
- } else {
- *temp = 0x00;
- temp = strrchr(path, '/');
- dbg("search '%s' in '%s', path='%s'", dev->id, temp, path);
- if (strstr(temp, dev->id) != NULL)
- found = 1;
- }
- if (!found) {
- dbg("id doesn't match");
+ if (strcmp_pattern(dev->id, temp) != 0)
return -ENODEV;
- }
-
- return 0;
+ else
+ return 0;
}
static int match_place(struct config_device *dev, struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
{
struct sysfs_device *sysfs_device;
struct sysfs_class_device *class_dev_parent;
+ struct timespec tspec;
int loop;
- char filename[SYSFS_PATH_MAX + 6];
- int retval;
- char *temp;
- int partition = 0;
/* Figure out where the device symlink is at. For char devices this will
* always be in the class_dev->path. But for block devices, it's different.
* symlink yet. We do sit and spin on waiting for them right now, we should
* possibly have a whitelist for these devices here...
*/
- strcpy(filename, class_dev->path);
- dbg("filename = %s", filename);
- if (strcmp(class_dev->classname, SYSFS_BLOCK_NAME) == 0) {
- if (isdigit(class_dev->path[strlen(class_dev->path)-1])) {
- temp = strrchr(filename, '/');
- if (temp) {
- char *temp2 = strrchr(filename, '/');
- partition = 1;
- *temp = 0x00;
- dbg("temp2 = %s", temp2);
- if (temp2 && (strcmp(temp2, "/block") == 0)) {
- /* oops, we have no parent block device, so go back to original directory */
- strcpy(filename, class_dev->path);
- partition = 0;
- }
- }
- }
- }
- strcat(filename, "/device");
+ class_dev_parent = sysfs_get_classdev_parent(class_dev);
+ if (class_dev_parent)
+ dbg("Really a partition");
- loop = 2;
+ tspec.tv_sec = 0;
+ tspec.tv_nsec = 10000000; /* sleep 10 millisec */
+ loop = 10;
while (loop--) {
- struct stat buf;
- dbg("looking for '%s'", filename);
- retval = stat(filename, &buf);
- if (!retval)
- break;
- /* sleep to give the kernel a chance to create the device file */
- sleep(1);
- }
+ nanosleep(&tspec, NULL);
+ if (class_dev_parent)
+ sysfs_device = sysfs_get_classdev_device(class_dev_parent);
+ else
+ sysfs_device = sysfs_get_classdev_device(class_dev);
- loop = 1; /* FIXME put a real value in here for when everything is fixed... */
- while (loop--) {
- /* find the sysfs_device for this class device */
- /* Wouldn't it really be nice if libsysfs could do this for us? */
- sysfs_device = sysfs_get_classdev_device(class_dev);
if (sysfs_device != NULL)
- goto exit;
-
- /* if it's a partition, we need to get the parent device */
- if (partition) {
- /* FIXME HACK HACK HACK HACK
- * for some reason partitions need this extra sleep here, in order
- * to wait for the device properly. Once the libsysfs code is
- * fixed properly, this sleep should go away, and we can just loop above.
- */
- sleep(1);
- dbg("really is a partition");
- class_dev_parent = sysfs_get_classdev_parent(class_dev);
- if (class_dev_parent == NULL) {
- dbg("sysfs_get_classdev_parent for class device '%s' failed", class_dev->name);
- } else {
- dbg("class_dev_parent->name='%s'", class_dev_parent->name);
- sysfs_device = sysfs_get_classdev_device(class_dev_parent);
- if (sysfs_device != NULL)
- goto exit;
- }
+ goto device_found;
+ }
+ dbg("timed out waiting for device symlink, continuing on anyway...");
+
+device_found:
+ /* We have another issue with just the wait above - the sysfs part of
+ * the kernel may not be quick enough to have created the link to the
+ * device under the "bus" subsystem. Due to this, the sysfs_device->bus
+ * will not contain the actual bus name :(
+ *
+ * Libsysfs now provides a new API sysfs_get_device_bus(), so use it
+ * if needed
+ */
+ if (sysfs_device) {
+ if (sysfs_device->bus[0] != '\0')
+ goto bus_found;
+
+ loop = 10;
+ tspec.tv_nsec = 10000000;
+ while (loop--) {
+ nanosleep(&tspec, NULL);
+ sysfs_get_device_bus(sysfs_device);
+
+ if (sysfs_device->bus[0] != '\0')
+ goto bus_found;
}
- /* sleep to give the kernel a chance to create the link */
- /* FIXME remove comment...
- sleep(1); */
+ dbg("timed out waiting to find the device bus, continuing on anyway");
+ goto exit;
+bus_found:
+ dbg("device %s is registered with bus '%s'",
+ sysfs_device->name, sysfs_device->bus);
}
- dbg("Timed out waiting for device symlink, continuing on anyway...");
exit:
return sysfs_device;
}
-int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev)
+static int match_rule(struct config_device *dev, struct sysfs_class_device *class_dev, struct udevice *udev, struct sysfs_device *sysfs_device)
{
- struct sysfs_device *sysfs_device = NULL;
- struct config_device *dev;
- struct perm_device *perm;
- char *pos;
-
- udev->mode = 0;
-
- /* find the sysfs_device associated with this class device */
- sysfs_device = get_sysfs_device(class_dev);
- if (sysfs_device) {
- dbg("sysfs_device->path='%s'", sysfs_device->path);
- dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
- dbg("sysfs_device->bus='%s'", sysfs_device->bus);
- strfieldcpy(udev->bus_id, sysfs_device->bus_id);
- wait_for_device_to_initialize(sysfs_device);
- } else {
- dbg("class_dev->name = '%s'", class_dev->name);
- }
-
- strfieldcpy(udev->kernel_name, class_dev->name);
-
- /* get kernel number */
- pos = class_dev->name + strlen(class_dev->name);
- while (isdigit(*(pos-1)))
- pos--;
- strfieldcpy(udev->kernel_number, pos);
- dbg("kernel_number='%s'", udev->kernel_number);
-
- /* look for a matching rule to apply */
- list_for_each_entry(dev, &config_device_list, node) {
- dbg("process rule");
-
+ while (1) {
/* check for matching bus value */
if (dev->bus[0] != '\0') {
if (sysfs_device == NULL) {
dbg("device has no bus");
- continue;
+ goto try_parent;
}
dbg("check for " FIELD_BUS " dev->bus='%s' sysfs_device->bus='%s'", dev->bus, sysfs_device->bus);
if (strcmp_pattern(dev->bus, sysfs_device->bus) != 0) {
dbg(FIELD_BUS " is not matching");
- continue;
+ goto try_parent;
} else {
dbg(FIELD_BUS " matches");
}
dbg("check for " FIELD_KERNEL " dev->kernel='%s' class_dev->name='%s'", dev->kernel, class_dev->name);
if (strcmp_pattern(dev->kernel, class_dev->name) != 0) {
dbg(FIELD_KERNEL " is not matching");
- continue;
+ goto try_parent;
} else {
dbg(FIELD_KERNEL " matches");
}
dbg("check " FIELD_ID);
if (match_id(dev, class_dev, sysfs_device) != 0) {
dbg(FIELD_ID " is not matching");
- continue;
+ goto try_parent;
} else {
dbg(FIELD_ID " matches");
}
dbg("check " FIELD_PLACE);
if (match_place(dev, class_dev, sysfs_device) != 0) {
dbg(FIELD_PLACE " is not matching");
- continue;
+ goto try_parent;
} else {
dbg(FIELD_PLACE " matches");
}
dbg("check " FIELD_SYSFS " pairs");
if (match_sysfs_pairs(dev, class_dev, sysfs_device) != 0) {
dbg(FIELD_SYSFS " is not matching");
- continue;
+ goto try_parent;
} else {
dbg(FIELD_SYSFS " matches");
}
apply_format(udev, dev->program);
if (execute_program(dev->program, udev->program_result, NAME_SIZE) != 0) {
dbg(FIELD_PROGRAM " returned nozero");
- continue;
+ goto try_parent;
} else {
dbg(FIELD_PROGRAM " returned successful");
}
dev->result, udev->program_result);
if (strcmp_pattern(dev->result, udev->program_result) != 0) {
dbg(FIELD_RESULT " is not matching");
- continue;
+ goto try_parent;
} else {
dbg(FIELD_RESULT " matches");
}
}
- /* check if we are instructed to ignore this device */
- if (dev->name[0] == '\0') {
- dbg("instructed to ignore this device");
- return -1;
- }
+ /* Yeah, we matched! */
+ return 0;
+
+try_parent:
+ dbg("try parent sysfs device");
+ sysfs_device = sysfs_get_device_parent(sysfs_device);
+ if (sysfs_device == NULL)
+ return -ENODEV;
+ dbg("sysfs_device->path='%s'", sysfs_device->path);
+ dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
+ dbg("sysfs_device->bus='%s'", sysfs_device->bus);
+ }
+
+}
+
+int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev)
+{
+ struct sysfs_device *sysfs_device = NULL;
+ struct config_device *dev;
+ struct perm_device *perm;
+ char *pos;
+
+ udev->mode = 0;
- /* Yup, this rule belongs to us! */
- dbg("found matching rule, '%s' becomes '%s'", dev->kernel, dev->name);
- strfieldcpy(udev->name, dev->name);
- strfieldcpy(udev->symlink, dev->symlink);
- goto found;
+ /* find the sysfs_device associated with this class device */
+ sysfs_device = get_sysfs_device(class_dev);
+ if (sysfs_device) {
+ dbg("sysfs_device->path='%s'", sysfs_device->path);
+ dbg("sysfs_device->bus_id='%s'", sysfs_device->bus_id);
+ dbg("sysfs_device->bus='%s'", sysfs_device->bus);
+ strfieldcpy(udev->bus_id, sysfs_device->bus_id);
+ wait_for_device_to_initialize(sysfs_device);
+ }
+ dbg("class_dev->name = '%s'", class_dev->name);
+
+ strfieldcpy(udev->kernel_name, class_dev->name);
+ fix_kernel_name(udev);
+ dbg("udev->kernel_name = '%s'", udev->kernel_name);
+
+ /* get kernel number */
+ pos = class_dev->name + strlen(class_dev->name);
+ while (isdigit(*(pos-1)))
+ pos--;
+ strfieldcpy(udev->kernel_number, pos);
+ dbg("kernel_number='%s'", udev->kernel_number);
+
+ /* look for a matching rule to apply */
+ list_for_each_entry(dev, &config_device_list, node) {
+ dbg("process rule");
+ if (match_rule(dev, class_dev, udev, sysfs_device) == 0) {
+ if (dev->name[0] == '\0') {
+ info("configured rule in '%s' at line %i applied, '%s' is ignored",
+ udev_rules_filename, dev->config_line, udev->kernel_name);
+ return -1;
+ }
+
+ info("configured rule in '%s' at line %i applied, '%s' becomes '%s'",
+ udev_rules_filename, dev->config_line, udev->kernel_name, dev->name);
+ strfieldcpy(udev->name, dev->name);
+ strfieldcpy(udev->symlink, dev->symlink);
+ goto found;
+ }
}
/* no rule was found so we use the kernel name */
strfieldcpy(udev->group, perm->group);
} else {
/* no matching perms found :( */
- udev->mode = get_default_mode(class_dev);
- udev->owner[0] = 0x00;
- udev->group[0] = 0x00;
+ udev->mode = get_default_mode();
+ strncpy(udev->owner, get_default_owner(), OWNER_SIZE);
+ strncpy(udev->group, get_default_group(), GROUP_SIZE);
}
dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o",
udev->name, udev->owner, udev->group, udev->mode);
~ianmdlvl / elogind.git / blobdiff