1 files changed, 141 insertions, 0 deletions
diff --git a/src/libsystemd/sd-device/device-util.c b/src/libsystemd/sd-device/device-util.c
new file mode 100644
index 0000000..529eff2
--- /dev/null
+++ b/src/libsystemd/sd-device/device-util.c
@@ -0,0 +1,141 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "device-private.h"
+#include "device-util.h"
+#include "devnum-util.h"
+#include "fd-util.h"
+#include "string-util.h"
+#include "strv.h"
+
+int devname_from_devnum(mode_t mode, dev_t devnum, char **ret) {
+        _cleanup_(sd_device_unrefp) sd_device *dev = NULL;
+        _cleanup_free_ char *s = NULL;
+        const char *devname;
+        int r;
+
+        assert(ret);
+
+        if (devnum_is_zero(devnum))
+                return device_path_make_inaccessible(mode, ret);
+
+        r = device_new_from_mode_and_devnum(&dev, mode, devnum);
+        if (r < 0)
+                return r;
+
+        r = sd_device_get_devname(dev, &devname);
+        if (r < 0)
+                return r;
+
+        s = strdup(devname);
+        if (!s)
+                return -ENOMEM;
+
+        *ret = TAKE_PTR(s);
+        return 0;
+}
+
+int device_open_from_devnum(mode_t mode, dev_t devnum, int flags, char **ret) {
+        _cleanup_(sd_device_unrefp) sd_device *dev = NULL;
+        _cleanup_close_ int fd = -EBADF;
+        int r;
+
+        r = device_new_from_mode_and_devnum(&dev, mode, devnum);
+        if (r < 0)
+                return r;
+
+        fd = sd_device_open(dev, flags);
+        if (fd < 0)
+                return fd;
+
+        if (ret) {
+                const char *devname;
+                char *s;
+
+                r = sd_device_get_devname(dev, &devname);
+                if (r < 0)
+                        return r;
+
+                s = strdup(devname);
+                if (!s)
+                        return -ENOMEM;
+
+                *ret = s;
+        }
+
+        return TAKE_FD(fd);
+}
+
+static int add_string_field(
+                sd_device *device,
+                const char *field,
+                int (*func)(sd_device *dev, const char **s),
+                char ***strv) {
+
+        const char *s;
+        int r;
+
+        assert(device);
+        assert(field);
+        assert(func);
+        assert(strv);
+
+        r = func(device, &s);
+        if (r < 0 && r != -ENOENT)
+                log_device_debug_errno(device, r, "Failed to get device \"%s\" property, ignoring: %m", field);
+        if (r >= 0)
+                (void) strv_extend_assignment(strv, field, s);
+
+        return 0;
+}
+
+char** device_make_log_fields(sd_device *device) {
+        _cleanup_strv_free_ char **strv = NULL;
+        dev_t devnum;
+        int ifindex;
+        sd_device_action_t action;
+        uint64_t seqnum, diskseq;
+        int r;
+
+        assert(device);
+
+        (void) add_string_field(device, "SYSPATH", sd_device_get_syspath, &strv);
+        (void) add_string_field(device, "SUBSYSTEM", sd_device_get_subsystem, &strv);
+        (void) add_string_field(device, "DEVTYPE", sd_device_get_devtype, &strv);
+        (void) add_string_field(device, "DRIVER", sd_device_get_driver, &strv);
+        (void) add_string_field(device, "DEVPATH", sd_device_get_devpath, &strv);
+        (void) add_string_field(device, "DEVNAME", sd_device_get_devname, &strv);
+        (void) add_string_field(device, "SYSNAME", sd_device_get_sysname, &strv);
+        (void) add_string_field(device, "SYSNUM", sd_device_get_sysnum, &strv);
+
+        r = sd_device_get_devnum(device, &devnum);
+        if (r < 0 && r != -ENOENT)
+                log_device_debug_errno(device, r, "Failed to get device \"DEVNUM\" property, ignoring: %m");
+        if (r >= 0)
+                (void) strv_extendf(&strv, "DEVNUM="DEVNUM_FORMAT_STR, DEVNUM_FORMAT_VAL(devnum));
+
+        r = sd_device_get_ifindex(device, &ifindex);
+        if (r < 0 && r != -ENOENT)
+                log_device_debug_errno(device, r, "Failed to get device \"IFINDEX\" property, ignoring: %m");
+        if (r >= 0)
+                (void) strv_extendf(&strv, "IFINDEX=%i", ifindex);
+
+        r = sd_device_get_action(device, &action);
+        if (r < 0 && r != -ENOENT)
+                log_device_debug_errno(device, r, "Failed to get device \"ACTION\" property, ignoring: %m");
+        if (r >= 0)
+                (void) strv_extendf(&strv, "ACTION=%s", device_action_to_string(action));
+
+        r = sd_device_get_seqnum(device, &seqnum);
+        if (r < 0 && r != -ENOENT)
+                log_device_debug_errno(device, r, "Failed to get device \"SEQNUM\" property, ignoring: %m");
+        if (r >= 0)
+                (void) strv_extendf(&strv, "SEQNUM=%"PRIu64, seqnum);
+
+        r = sd_device_get_diskseq(device, &diskseq);
+        if (r < 0 && r != -ENOENT)
+                log_device_debug_errno(device, r, "Failed to get device \"DISKSEQ\" property, ignoring: %m");
+        if (r >= 0)
+                (void) strv_extendf(&strv, "DISKSEQ=%"PRIu64, diskseq);
+
+        return TAKE_PTR(strv);
+}