mirror of
https://github.com/systemd/systemd.git
synced 2024-12-23 21:35:11 +03:00
[PATCH] fix permission handling logic
Now we can handle wildcards properly within the permission file.
This commit is contained in:
parent
206d3623c6
commit
61219c756a
129
namedev.c
129
namedev.c
@ -39,6 +39,7 @@
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#include "klibc_fixups.h"
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LIST_HEAD(config_device_list);
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LIST_HEAD(perm_device_list);
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/* compare string with pattern (supports * ? [0-9] [!A-Z]) */
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static int strcmp_pattern(const char *p, const char *s)
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@ -113,7 +114,6 @@ int add_config_dev(struct config_device *new_dev)
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if (strncmp(dev->bus, new_dev->bus, sizeof(dev->name)))
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continue;
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copy_var(dev, new_dev, type);
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copy_var(dev, new_dev, mode);
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copy_string(dev, new_dev, bus);
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copy_string(dev, new_dev, sysfs_file);
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copy_string(dev, new_dev, sysfs_value);
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@ -121,8 +121,6 @@ int add_config_dev(struct config_device *new_dev)
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copy_string(dev, new_dev, place);
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copy_string(dev, new_dev, kernel_name);
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copy_string(dev, new_dev, exec_program);
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copy_string(dev, new_dev, owner);
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copy_string(dev, new_dev, group);
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return 0;
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}
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@ -136,6 +134,46 @@ int add_config_dev(struct config_device *new_dev)
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return 0;
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}
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int add_perm_dev(struct perm_device *new_dev)
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{
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struct list_head *tmp;
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struct perm_device *tmp_dev;
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/* update the values if we already have the device */
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list_for_each(tmp, &perm_device_list) {
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struct perm_device *dev = list_entry(tmp, struct perm_device, node);
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if (strcmp_pattern(new_dev->name, dev->name))
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continue;
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copy_var(dev, new_dev, mode);
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copy_string(dev, new_dev, owner);
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copy_string(dev, new_dev, group);
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return 0;
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}
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/* not found, add new structure to the perm list */
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tmp_dev = malloc(sizeof(*tmp_dev));
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if (!tmp_dev)
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return -ENOMEM;
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memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
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list_add_tail(&tmp_dev->node, &perm_device_list);
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//dump_perm_dev(tmp_dev);
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return 0;
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}
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static struct perm_device *find_perm(char *name)
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{
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struct list_head *tmp;
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struct perm_device *perm = NULL;
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list_for_each(tmp, &perm_device_list) {
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perm = list_entry(tmp, struct perm_device, node);
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if (strcmp_pattern(perm->name, name))
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continue;
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return perm;
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}
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return NULL;
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}
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static mode_t get_default_mode(struct sysfs_class_device *class_dev)
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{
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mode_t mode = 0600; /* default to owner rw only */
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@ -328,15 +366,8 @@ static int do_callout(struct sysfs_class_device *class_dev, struct udevice *udev
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if (strcmp_pattern(dev->id, udev->callout_value) != 0)
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continue;
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strfieldcpy(udev->name, dev->name);
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if (dev->mode != 0) {
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udev->mode = dev->mode;
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strfieldcpy(udev->owner, dev->owner);
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strfieldcpy(udev->group, dev->group);
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}
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dbg("callout returned matching value '%s', '%s' becomes '%s'"
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" - owner='%s', group='%s', mode=%#o",
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dev->id, class_dev->name, udev->name,
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dev->owner, dev->group, dev->mode);
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dbg("callout returned matching value '%s', '%s' becomes '%s'",
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dev->id, class_dev->name, udev->name);
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return 0;
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}
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return -ENODEV;
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@ -382,15 +413,8 @@ label_found:
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continue;
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strfieldcpy(udev->name, dev->name);
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if (dev->mode != 0) {
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udev->mode = dev->mode;
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strfieldcpy(udev->owner, dev->owner);
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strfieldcpy(udev->group, dev->group);
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}
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dbg("found matching attribute '%s', '%s' becomes '%s' "
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"- owner='%s', group='%s', mode=%#o",
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dev->sysfs_file, class_dev->name, udev->name,
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dev->owner, dev->group, dev->mode);
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dbg("found matching attribute '%s', '%s' becomes '%s' ",
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dev->sysfs_file, class_dev->name, udev->name);
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return 0;
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}
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@ -434,15 +458,8 @@ static int do_number(struct sysfs_class_device *class_dev, struct udevice *udev,
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if (!found)
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continue;
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strfieldcpy(udev->name, dev->name);
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if (dev->mode != 0) {
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udev->mode = dev->mode;
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strfieldcpy(udev->owner, dev->owner);
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strfieldcpy(udev->group, dev->group);
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}
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dbg("found matching id '%s', '%s' becomes '%s'"
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" - owner='%s', group ='%s', mode=%#o",
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dev->id, class_dev->name, udev->name,
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dev->owner, dev->group, dev->mode);
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dbg("found matching id '%s', '%s' becomes '%s'",
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dev->id, class_dev->name, udev->name);
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return 0;
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}
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return -ENODEV;
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@ -486,15 +503,8 @@ static int do_topology(struct sysfs_class_device *class_dev, struct udevice *ude
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continue;
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strfieldcpy(udev->name, dev->name);
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if (dev->mode != 0) {
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udev->mode = dev->mode;
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strfieldcpy(udev->owner, dev->owner);
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strfieldcpy(udev->group, dev->group);
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}
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dbg("found matching place '%s', '%s' becomes '%s'"
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" - owner='%s', group ='%s', mode=%#o",
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dev->place, class_dev->name, udev->name,
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dev->owner, dev->group, dev->mode);
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dbg("found matching place '%s', '%s' becomes '%s'",
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dev->place, class_dev->name, udev->name);
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return 0;
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}
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return -ENODEV;
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@ -515,15 +525,7 @@ static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev
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continue;
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strfieldcpy(udev->name, dev->name);
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if (dev->mode != 0) {
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udev->mode = dev->mode;
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strfieldcpy(udev->owner, dev->owner);
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strfieldcpy(udev->group, dev->group);
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}
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dbg("found name, '%s' becomes '%s'"
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" - owner='%s', group='%s', mode = %#o",
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dev->kernel_name, udev->name,
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dev->owner, dev->group, dev->mode);
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dbg("found name, '%s' becomes '%s'", dev->kernel_name, udev->name);
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return 0;
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}
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@ -532,24 +534,8 @@ static int do_replace(struct sysfs_class_device *class_dev, struct udevice *udev
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static void do_kernelname(struct sysfs_class_device *class_dev, struct udevice *udev)
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{
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struct config_device *dev;
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struct list_head *tmp;
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int len;
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/* heh, this is pretty simple... */
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strfieldcpy(udev->name, class_dev->name);
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/* look for permissions */
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list_for_each(tmp, &config_device_list) {
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dev = list_entry(tmp, struct config_device, node);
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len = strlen(dev->name);
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if (strcmp_pattern(dev->name, class_dev->name))
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continue;
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if (dev->mode != 0) {
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dbg("found permissions for '%s'", class_dev->name);
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udev->mode = dev->mode;
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strfieldcpy(udev->owner, dev->owner);
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strfieldcpy(udev->group, dev->group);
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}
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}
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}
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int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *udev)
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@ -558,6 +544,7 @@ int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *ud
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struct sysfs_class_device *class_dev_parent = NULL;
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int retval = 0;
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char *temp = NULL;
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struct perm_device *perm;
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udev->mode = 0;
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@ -632,12 +619,19 @@ found:
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apply_format(udev, udev->name);
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done:
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/* mode was never set above */
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if (!udev->mode) {
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perm = find_perm(udev->name);
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if (perm) {
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udev->mode = perm->mode;
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strfieldcpy(udev->owner, perm->owner);
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strfieldcpy(udev->group, perm->group);
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} else {
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/* no matching perms found :( */
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udev->mode = get_default_mode(class_dev);
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udev->owner[0] = 0x00;
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udev->group[0] = 0x00;
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}
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dbg("name, '%s' is going to have owner='%s', group='%s', mode = %#o",
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udev->name, udev->owner, udev->group, udev->mode);
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if (class_dev_parent)
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sysfs_close_class_device(class_dev_parent);
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@ -658,5 +652,6 @@ int namedev_init(void)
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return retval;
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dump_config_dev_list();
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dump_perm_dev_list();
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return retval;
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}
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10
namedev.h
10
namedev.h
@ -62,8 +62,12 @@ struct config_device {
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char place[PLACE_SIZE];
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char kernel_name[NAME_SIZE];
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char exec_program[FILE_SIZE];
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char name[NAME_SIZE];
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};
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struct perm_device {
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struct list_head node;
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/* what to set the device to */
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char name[NAME_SIZE];
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char owner[OWNER_SIZE];
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char group[GROUP_SIZE];
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@ -71,6 +75,7 @@ struct config_device {
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};
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extern struct list_head config_device_list;
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extern struct list_head perm_device_list;
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extern int namedev_init(void);
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extern int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *dev);
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@ -78,8 +83,11 @@ extern int namedev_init_permissions(void);
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extern int namedev_init_rules(void);
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extern int add_config_dev(struct config_device *new_dev);
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extern int add_perm_dev(struct perm_device *new_dev);
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extern void dump_config_dev(struct config_device *dev);
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extern void dump_config_dev_list(void);
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extern void dump_perm_dev(struct perm_device *dev);
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extern void dump_perm_dev_list(void);
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extern int get_pair(char **orig_string, char **left, char **right);
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@ -88,39 +88,27 @@ void dump_config_dev(struct config_device *dev)
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{
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switch (dev->type) {
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case KERNEL_NAME:
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dbg_parse("KERNEL name='%s' ,"
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"owner='%s', group='%s', mode=%#o",
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dev->name, dev->owner, dev->group, dev->mode);
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dbg_parse("KERNEL name='%s'", dev->name);
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break;
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case LABEL:
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dbg_parse("LABEL name='%s', bus='%s', sysfs_file='%s', sysfs_value='%s', "
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"owner='%s', group='%s', mode=%#o",
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dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value,
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dev->owner, dev->group, dev->mode);
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dbg_parse("LABEL name='%s', bus='%s', sysfs_file='%s', sysfs_value='%s'",
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dev->name, dev->bus, dev->sysfs_file, dev->sysfs_value);
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break;
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case NUMBER:
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dbg_parse("NUMBER name='%s', bus='%s', id='%s', "
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"owner='%s', group='%s', mode=%#o",
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dev->name, dev->bus, dev->id,
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dev->owner, dev->group, dev->mode);
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dbg_parse("NUMBER name='%s', bus='%s', id='%s'",
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dev->name, dev->bus, dev->id);
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break;
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case TOPOLOGY:
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dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s', "
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"owner='%s', group='%s', mode=%#o",
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dev->name, dev->bus, dev->place,
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dev->owner, dev->group, dev->mode);
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dbg_parse("TOPOLOGY name='%s', bus='%s', place='%s'",
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dev->name, dev->bus, dev->place);
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break;
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case REPLACE:
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dbg_parse("REPLACE name=%s, kernel_name=%s, "
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"owner='%s', group='%s', mode=%#o",
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dev->name, dev->kernel_name,
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dev->owner, dev->group, dev->mode);
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dbg_parse("REPLACE name=%s, kernel_name=%s",
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dev->name, dev->kernel_name);
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break;
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case CALLOUT:
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dbg_parse("CALLOUT name='%s', bus='%s', program='%s', id='%s', "
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"owner='%s', group='%s', mode=%#o",
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dev->name, dev->bus, dev->exec_program, dev->id,
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dev->owner, dev->group, dev->mode);
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dbg_parse("CALLOUT name='%s', bus='%s', program='%s', id='%s'",
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dev->name, dev->bus, dev->exec_program, dev->id);
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break;
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default:
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dbg_parse("unknown type of method");
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@ -136,7 +124,24 @@ void dump_config_dev_list(void)
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dump_config_dev(dev);
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}
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}
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void dump_perm_dev(struct perm_device *dev)
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{
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dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
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dev->name, dev->owner, dev->group, dev->mode);
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}
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void dump_perm_dev_list(void)
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{
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struct list_head *tmp;
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list_for_each(tmp, &perm_device_list) {
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struct perm_device *dev = list_entry(tmp, struct perm_device, node);
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dump_perm_dev(dev);
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}
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}
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int namedev_init_rules(void)
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{
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char line[255];
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@ -344,7 +349,7 @@ int namedev_init_permissions(void)
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char *temp2;
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FILE *fd;
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int retval = 0;
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struct config_device dev;
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struct perm_device dev;
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fd = fopen(udev_permissions_filename, "r");
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if (fd != NULL) {
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@ -407,7 +412,7 @@ int namedev_init_permissions(void)
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dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
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dev.name, dev.owner, dev.group,
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dev.mode);
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retval = add_config_dev(&dev);
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retval = add_perm_dev(&dev);
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if (retval) {
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dbg("add_config_dev returned with error %d", retval);
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goto exit;
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@ -3,4 +3,4 @@ ttyUSB0:root:uucp:0660
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ttyUSB1:root:uucp:0666
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visor:500:500:0666
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dsp1:::0666
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boot_disk?:::0666
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