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/* 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 (major(devnum) == 0 && minor(devnum) == 0)
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);
}
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