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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"
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 = -1;
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);
}
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