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Diffstat (limited to 'src/libsystemd/sd-device')
-rw-r--r--src/libsystemd/sd-device/device-enumerator.c34
-rw-r--r--src/libsystemd/sd-device/device-internal.h2
-rw-r--r--src/libsystemd/sd-device/sd-device.c127
3 files changed, 110 insertions, 53 deletions
diff --git a/src/libsystemd/sd-device/device-enumerator.c b/src/libsystemd/sd-device/device-enumerator.c
index 4a7a8b1f9e..62d03ae00d 100644
--- a/src/libsystemd/sd-device/device-enumerator.c
+++ b/src/libsystemd/sd-device/device-enumerator.c
@@ -696,17 +696,19 @@ static int enumerator_scan_devices_tag(sd_device_enumerator *enumerator, const c
static int enumerator_scan_devices_tags(sd_device_enumerator *enumerator) {
const char *tag;
Iterator i;
- int r;
+ int r = 0;
assert(enumerator);
SET_FOREACH(tag, enumerator->match_tag, i) {
- r = enumerator_scan_devices_tag(enumerator, tag);
- if (r < 0)
- return r;
+ int k;
+
+ k = enumerator_scan_devices_tag(enumerator, tag);
+ if (k < 0)
+ r = k;
}
- return 0;
+ return r;
}
static int parent_add_child(sd_device_enumerator *enumerator, const char *path) {
@@ -838,7 +840,7 @@ static int enumerator_scan_devices_all(sd_device_enumerator *enumerator) {
int device_enumerator_scan_devices(sd_device_enumerator *enumerator) {
sd_device *device;
- int r;
+ int r = 0, k;
assert(enumerator);
@@ -850,22 +852,22 @@ int device_enumerator_scan_devices(sd_device_enumerator *enumerator) {
sd_device_unref(device);
if (!set_isempty(enumerator->match_tag)) {
- r = enumerator_scan_devices_tags(enumerator);
- if (r < 0)
- return r;
+ k = enumerator_scan_devices_tags(enumerator);
+ if (k < 0)
+ r = k;
} else if (enumerator->match_parent) {
- r = enumerator_scan_devices_children(enumerator);
- if (r < 0)
- return r;
+ k = enumerator_scan_devices_children(enumerator);
+ if (k < 0)
+ r = k;
} else {
- r = enumerator_scan_devices_all(enumerator);
- if (r < 0)
- return r;
+ k = enumerator_scan_devices_all(enumerator);
+ if (k < 0)
+ r = k;
}
enumerator->scan_uptodate = true;
- return 0;
+ return r;
}
_public_ sd_device *sd_device_enumerator_get_device_first(sd_device_enumerator *enumerator) {
diff --git a/src/libsystemd/sd-device/device-internal.h b/src/libsystemd/sd-device/device-internal.h
index ab222e27de..9fad388953 100644
--- a/src/libsystemd/sd-device/device-internal.h
+++ b/src/libsystemd/sd-device/device-internal.h
@@ -76,6 +76,8 @@ struct sd_device {
char *subsystem;
bool subsystem_set; /* don't reread subsystem */
+ char *driver_subsystem; /* only set for the 'drivers' subsystem */
+ bool driver_subsystem_set; /* don't reread subsystem */
char *driver;
bool driver_set; /* don't reread driver */
diff --git a/src/libsystemd/sd-device/sd-device.c b/src/libsystemd/sd-device/sd-device.c
index 5c9e00ed80..d503232505 100644
--- a/src/libsystemd/sd-device/sd-device.c
+++ b/src/libsystemd/sd-device/sd-device.c
@@ -75,6 +75,7 @@ _public_ sd_device *sd_device_unref(sd_device *device) {
free(device->devtype);
free(device->devname);
free(device->subsystem);
+ free(device->driver_subsystem);
free(device->driver);
free(device->id_filename);
free(device->properties_strv);
@@ -258,7 +259,8 @@ _public_ int sd_device_new_from_devnum(sd_device **ret, char type, dev_t devnum)
}
_public_ int sd_device_new_from_subsystem_sysname(sd_device **ret, const char *subsystem, const char *sysname) {
- char *syspath;
+ char *name, *syspath;
+ size_t len = 0;
assert_return(ret, -EINVAL);
assert_return(subsystem, -EINVAL);
@@ -297,33 +299,29 @@ _public_ int sd_device_new_from_subsystem_sysname(sd_device **ret, const char *s
syspath = strjoina("/sys/bus/", subsys, "/drivers/", driver);
if (access(syspath, F_OK) >= 0)
return sd_device_new_from_syspath(ret, syspath);
- } else
- return -EINVAL;
- } else {
- char *name;
- size_t len = 0;
+ }
+ }
- /* translate sysname back to sysfs filename */
- name = strdupa(sysname);
- while (name[len] != '\0') {
- if (name[len] == '/')
- name[len] = '!';
+ /* translate sysname back to sysfs filename */
+ name = strdupa(sysname);
+ while (name[len] != '\0') {
+ if (name[len] == '/')
+ name[len] = '!';
- len++;
- }
+ len++;
+ }
- syspath = strjoina("/sys/subsystem/", subsystem, "/devices/", name);
- if (access(syspath, F_OK) >= 0)
- return sd_device_new_from_syspath(ret, syspath);
+ syspath = strjoina("/sys/subsystem/", subsystem, "/devices/", name);
+ if (access(syspath, F_OK) >= 0)
+ return sd_device_new_from_syspath(ret, syspath);
- syspath = strjoina("/sys/bus/", subsystem, "/devices/", name);
- if (access(syspath, F_OK) >= 0)
- return sd_device_new_from_syspath(ret, syspath);
+ syspath = strjoina("/sys/bus/", subsystem, "/devices/", name);
+ if (access(syspath, F_OK) >= 0)
+ return sd_device_new_from_syspath(ret, syspath);
- syspath = strjoina("/sys/class/", subsystem, "/", name);
- if (access(syspath, F_OK) >= 0)
- return sd_device_new_from_syspath(ret, syspath);
- }
+ syspath = strjoina("/sys/class/", subsystem, "/", name);
+ if (access(syspath, F_OK) >= 0)
+ return sd_device_new_from_syspath(ret, syspath);
return -ENODEV;
}
@@ -766,21 +764,45 @@ int device_set_subsystem(sd_device *device, const char *_subsystem) {
return 0;
}
+static int device_set_drivers_subsystem(sd_device *device, const char *_subsystem) {
+ _cleanup_free_ char *subsystem = NULL;
+ int r;
+
+ assert(device);
+ assert(_subsystem);
+ assert(*_subsystem);
+
+ subsystem = strdup(_subsystem);
+ if (!subsystem)
+ return -ENOMEM;
+
+ r = device_set_subsystem(device, "drivers");
+ if (r < 0)
+ return r;
+
+ free(device->driver_subsystem);
+ device->driver_subsystem = subsystem;
+ subsystem = NULL;
+
+ return 0;
+}
+
_public_ int sd_device_get_subsystem(sd_device *device, const char **ret) {
+ const char *syspath, *drivers = NULL;
+ int r;
+
assert_return(ret, -EINVAL);
assert_return(device, -EINVAL);
+ r = sd_device_get_syspath(device, &syspath);
+ if (r < 0)
+ return r;
+
if (!device->subsystem_set) {
_cleanup_free_ char *subsystem = NULL;
- const char *syspath;
char *path;
- int r;
/* read 'subsystem' link */
- r = sd_device_get_syspath(device, &syspath);
- if (r < 0)
- return r;
-
path = strjoina(syspath, "/subsystem");
r = readlink_value(path, &subsystem);
if (r >= 0)
@@ -788,16 +810,39 @@ _public_ int sd_device_get_subsystem(sd_device *device, const char **ret) {
/* use implicit names */
else if (path_startswith(device->devpath, "/module/"))
r = device_set_subsystem(device, "module");
- else if (strstr(device->devpath, "/drivers/"))
- r = device_set_subsystem(device, "drivers");
- else if (path_startswith(device->devpath, "/subsystem/") ||
- path_startswith(device->devpath, "/class/") ||
- path_startswith(device->devpath, "/bus/"))
+ else if (!(drivers = strstr(syspath, "/drivers/")) &&
+ (path_startswith(device->devpath, "/subsystem/") ||
+ path_startswith(device->devpath, "/class/") ||
+ path_startswith(device->devpath, "/bus/")))
r = device_set_subsystem(device, "subsystem");
if (r < 0 && r != -ENOENT)
return log_debug_errno(r, "sd-device: could not set subsystem for %s: %m", device->devpath);
device->subsystem_set = true;
+ } else if (!device->driver_subsystem_set)
+ drivers = strstr(syspath, "/drivers/");
+
+ if (!device->driver_subsystem_set) {
+ if (drivers) {
+ _cleanup_free_ char *subpath = NULL;
+
+ subpath = strndup(syspath, drivers - syspath);
+ if (!subpath)
+ r = -ENOMEM;
+ else {
+ const char *subsys;
+
+ subsys = strrchr(subpath, '/');
+ if (!subsys)
+ r = -EINVAL;
+ else
+ r = device_set_drivers_subsystem(device, subsys + 1);
+ }
+ if (r < 0 && r != -ENOENT)
+ return log_debug_errno(r, "sd-device: could not set subsystem for driver %s: %m", device->devpath);
+ }
+
+ device->driver_subsystem_set = true;
}
if (!device->subsystem)
@@ -1234,9 +1279,17 @@ int device_get_id_filename(sd_device *device, const char **ret) {
if (!subsystem)
return -EINVAL;
- r = asprintf(&id, "+%s:%s", subsystem, sysname);
- if (r < 0)
- return -ENOMEM;
+ if (streq(subsystem, "drivers")) {
+ /* the 'drivers' pseudo-subsystem is special, and needs the real subsystem
+ * encoded as well */
+ r = asprintf(&id, "+drivers:%s:%s", device->driver_subsystem, sysname);
+ if (r < 0)
+ return -ENOMEM;
+ } else {
+ r = asprintf(&id, "+%s:%s", subsystem, sysname);
+ if (r < 0)
+ return -ENOMEM;
+ }
}
device->id_filename = id;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-02 05:24:36 +0000