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[PATCH] fix permission handling logic 

Now we can handle wildcards properly within the permission file.
This commit is contained in:
greg@kroah.com 2003-12-03 18:33:58 -08:00 committed by Greg KH
parent 206d3623c6
commit 61219c756a
4 changed files with 103 additions and 95 deletions
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129
namedev.c
View File

@ -39,6 +39,7 @@
#include "klibc_fixups.h"
LIST_HEAD(config_device_list);
LIST_HEAD(perm_device_list);
/* compare string with pattern (supports * ? [0-9] [!A-Z]) */
static int strcmp_pattern(const char *p, const char *s)
@ -113,7 +114,6 @@ int add_config_dev(struct config_device *new_dev)
if (strncmp(dev->bus, new_dev->bus, sizeof(dev->name)))
continue;
copy_var(dev, new_dev, type);
copy_var(dev, new_dev, mode);
copy_string(dev, new_dev, bus);
copy_string(dev, new_dev, sysfs_file);
copy_string(dev, new_dev, sysfs_value);
@ -121,8 +121,6 @@ int add_config_dev(struct config_device *new_dev)
copy_string(dev, new_dev, place);
copy_string(dev, new_dev, kernel_name);
copy_string(dev, new_dev, exec_program);
copy_string(dev, new_dev, owner);
copy_string(dev, new_dev, group);
return 0;
}
@ -136,6 +134,46 @@ int add_config_dev(struct config_device *new_dev)
return 0;
}
int add_perm_dev(struct perm_device *new_dev)
{
struct list_head *tmp;
struct perm_device *tmp_dev;
/* update the values if we already have the device */
list_for_each(tmp, &perm_device_list) {
struct perm_device *dev = list_entry(tmp, struct perm_device, node);
if (strcmp_pattern(new_dev->name, dev->name))
continue;
copy_var(dev, new_dev, mode);
copy_string(dev, new_dev, owner);
copy_string(dev, new_dev, group);
return 0;
}
/* not found, add new structure to the perm list */
tmp_dev = malloc(sizeof(*tmp_dev));
if (!tmp_dev)
return -ENOMEM;
memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
list_add_tail(&tmp_dev->node, &perm_device_list);
//dump_perm_dev(tmp_dev);
return 0;
}
static struct perm_device *find_perm(char *name)
{
struct list_head *tmp;
struct perm_device *perm = NULL;
list_for_each(tmp, &perm_device_list) {
perm = list_entry(tmp, struct perm_device, node);
if (strcmp_pattern(perm->name, name))
continue;
return perm;
}
return NULL;
}
static mode_t get_default_mode(struct sysfs_class_device *class_dev)
{
mode_t mode = 0600; /* default to owner rw only */
@ -328,15 +366,8 @@ static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev
if (strcmp_pattern(dev->id, udev->callout_value) != 0)
continue;
strfieldcpy(udev->name, dev->name);
if (dev->mode != 0) {
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
dbg("callout returned matching value '%s', '%s' becomes '%s'"
" - owner='%s', group='%s', mode=%#o",
dev->id, class_dev->name, udev->name,
dev->owner, dev->group, dev->mode);
dbg("callout returned matching value '%s', '%s' becomes '%s'",
dev->id, class_dev->name, udev->name);
return 0;
}
return -ENODEV;
@ -382,15 +413,8 @@ label_found:
continue;
strfieldcpy(udev->name, dev->name);
if (dev->mode != 0) {
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
dbg("found matching attribute '%s', '%s' becomes '%s' "
"- owner='%s', group='%s', mode=%#o",
dev->sysfs_file, class_dev->name, udev->name,
dev->owner, dev->group, dev->mode);
dbg("found matching attribute '%s', '%s' becomes '%s' ",
dev->sysfs_file, class_dev->name, udev->name);
return 0;
}
@ -434,15 +458,8 @@ static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev,
if (!found)
continue;
strfieldcpy(udev->name, dev->name);
if (dev->mode != 0) {
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
dbg("found matching id '%s', '%s' becomes '%s'"
" - owner='%s', group ='%s', mode=%#o",
dev->id, class_dev->name, udev->name,
dev->owner, dev->group, dev->mode);
dbg("found matching id '%s', '%s' becomes '%s'",
dev->id, class_dev->name, udev->name);
return 0;
}
return -ENODEV;
@ -486,15 +503,8 @@ static int do_topology(struct sysfs_class_device *class_dev, struct udevice *ude
continue;
strfieldcpy(udev->name, dev->name);
if (dev->mode != 0) {
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
dbg("found matching place '%s', '%s' becomes '%s'"
" - owner='%s', group ='%s', mode=%#o",
dev->place, class_dev->name, udev->name,
dev->owner, dev->group, dev->mode);
dbg("found matching place '%s', '%s' becomes '%s'",
dev->place, class_dev->name, udev->name);
return 0;
}
return -ENODEV;
@ -515,15 +525,7 @@ static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev
continue;
strfieldcpy(udev->name, dev->name);
if (dev->mode != 0) {
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
dbg("found name, '%s' becomes '%s'"
" - owner='%s', group='%s', mode = %#o",
dev->kernel_name, udev->name,
dev->owner, dev->group, dev->mode);
dbg("found name, '%s' becomes '%s'", dev->kernel_name, udev->name);
return 0;
}
@ -532,24 +534,8 @@ static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev
static void do_kernelname(struct sysfs_class_device *class_dev, struct udevice *udev)
{
struct config_device *dev;
struct list_head *tmp;
int len;
/* heh, this is pretty simple... */
strfieldcpy(udev->name, class_dev->name);
/* look for permissions */
list_for_each(tmp, &config_device_list) {
dev = list_entry(tmp, struct config_device, node);
len = strlen(dev->name);
if (strcmp_pattern(dev->name, class_dev->name))
continue;
if (dev->mode != 0) {
dbg("found permissions for '%s'", class_dev->name);
udev->mode = dev->mode;
strfieldcpy(udev->owner, dev->owner);
strfieldcpy(udev->group, dev->group);
}
}
}
int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev)
@ -558,6 +544,7 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud
struct sysfs_class_device *class_dev_parent = NULL;
int retval = 0;
char *temp = NULL;
struct perm_device *perm;
udev->mode = 0;
@ -632,12 +619,19 @@ found:
apply_format(udev, udev->name);
done:
/* mode was never set above */
if (!udev->mode) {
perm = find_perm(udev->name);
if (perm) {
udev->mode = perm->mode;
strfieldcpy(udev->owner, perm->owner);
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;
}
dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o",
udev->name, udev->owner, udev->group, udev->mode);
if (class_dev_parent)
sysfs_close_class_device(class_dev_parent);
@ -658,5 +652,6 @@ int namedev_init(void)
return retval;
dump_config_dev_list();
dump_perm_dev_list();
return retval;
}

10
namedev.h
View File

@ -62,8 +62,12 @@ struct config_device {
char place[PLACE_SIZE];
char kernel_name[NAME_SIZE];
char exec_program[FILE_SIZE];
char name[NAME_SIZE];
};
struct perm_device {
struct list_head node;
/* what to set the device to */
char name[NAME_SIZE];
char owner[OWNER_SIZE];
char group[GROUP_SIZE];
@ -71,6 +75,7 @@ struct config_device {
};
extern struct list_head config_device_list;
extern struct list_head perm_device_list;
extern int namedev_init(void);
extern int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *dev);
@ -78,8 +83,11 @@ extern int namedev_init_permissions(void);
extern int namedev_init_rules(void);
extern int add_config_dev(struct config_device *new_dev);
extern int add_perm_dev(struct perm_device *new_dev);
extern void dump_config_dev(struct config_device *dev);
extern void dump_config_dev_list(void);
extern void dump_perm_dev(struct perm_device *dev);
extern void dump_perm_dev_list(void);
extern int get_pair(char **orig_string, char **left, char **right);

57
namedev_parse.c
View File

@ -88,39 +88,27 @@ void dump_config_dev(struct config_device *dev)
{
switch (dev->type) {
case KERNEL_NAME:
dbg_parse("KERNEL name='%s' ,"
"owner='%s', group='%s', mode=%#o",
dev->name, dev->owner, dev->group, dev->mode);
dbg_parse("KERNEL name='%s'", dev->name);
break;
case LABEL:
dbg_parse("LABEL name='%s', bus='%s', sysfs_file='%s', sysfs_value='%s', "
"owner='%s', group='%s', mode=%#o",
dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value,
dev->owner, dev->group, dev->mode);
dbg_parse("LABEL name='%s', bus='%s', sysfs_file='%s', sysfs_value='%s'",
dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value);
break;
case NUMBER:
dbg_parse("NUMBER name='%s', bus='%s', id='%s', "
"owner='%s', group='%s', mode=%#o",
dev->name, dev->bus, dev->id,
dev->owner, dev->group, dev->mode);
dbg_parse("NUMBER name='%s', bus='%s', id='%s'",
dev->name, dev->bus, dev->id);
break;
case TOPOLOGY:
dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s', "
"owner='%s', group='%s', mode=%#o",
dev->name, dev->bus, dev->place,
dev->owner, dev->group, dev->mode);
dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s'",
dev->name, dev->bus, dev->place);
break;
case REPLACE:
dbg_parse("REPLACE name=%s, kernel_name=%s, "
"owner='%s', group='%s', mode=%#o",
dev->name, dev->kernel_name,
dev->owner, dev->group, dev->mode);
dbg_parse("REPLACE name=%s, kernel_name=%s",
dev->name, dev->kernel_name);
break;
case CALLOUT:
dbg_parse("CALLOUT name='%s', bus='%s', program='%s', id='%s', "
"owner='%s', group='%s', mode=%#o",
dev->name, dev->bus, dev->exec_program, dev->id,
dev->owner, dev->group, dev->mode);
dbg_parse("CALLOUT name='%s', bus='%s', program='%s', id='%s'",
dev->name, dev->bus, dev->exec_program, dev->id);
break;
default:
dbg_parse("unknown type of method");
@ -136,7 +124,24 @@ void dump_config_dev_list(void)
dump_config_dev(dev);
}
}
void dump_perm_dev(struct perm_device *dev)
{
dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
dev->name, dev->owner, dev->group, dev->mode);
}
void dump_perm_dev_list(void)
{
struct list_head *tmp;
list_for_each(tmp, &perm_device_list) {
struct perm_device *dev = list_entry(tmp, struct perm_device, node);
dump_perm_dev(dev);
}
}
int namedev_init_rules(void)
{
char line[255];
@ -344,7 +349,7 @@ int namedev_init_permissions(void)
char *temp2;
FILE *fd;
int retval = 0;
struct config_device dev;
struct perm_device dev;
fd = fopen(udev_permissions_filename, "r");
if (fd != NULL) {
@ -407,7 +412,7 @@ int namedev_init_permissions(void)
dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
dev.name, dev.owner, dev.group,
dev.mode);
retval = add_config_dev(&dev);
retval = add_perm_dev(&dev);
if (retval) {
dbg("add_config_dev returned with error %d", retval);
goto exit;

2
test/udev.permissions
View File

@ -3,4 +3,4 @@ ttyUSB0:root:uucp:0660
ttyUSB1:root:uucp:0666
visor:500:500:0666
dsp1:::0666
boot_disk?:::0666