From b750101eb236130cf056c675997decbac904cc49 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:35:18 +0200 Subject: Adding upstream version 252.22. Signed-off-by: Daniel Baumann --- src/libsystemd/sd-device/device-util.c | 65 ++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 src/libsystemd/sd-device/device-util.c (limited to 'src/libsystemd/sd-device/device-util.c') diff --git a/src/libsystemd/sd-device/device-util.c b/src/libsystemd/sd-device/device-util.c new file mode 100644 index 0000000..b192914 --- /dev/null +++ b/src/libsystemd/sd-device/device-util.c @@ -0,0 +1,65 @@ +/* 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); +} -- cgit v1.2.3