e5ca27b772
This is a simple wrapper around udev_device_new_from_devnum(), and uses the data from a struct stat's .st_rdev field to derive the udev_device object.
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2017 Zbigniew Jędrzejewski-Szmek
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***/
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#include <string.h>
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#include "fileio.h"
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#include "log.h"
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#include "string-util.h"
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#include "udev-util.h"
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int udev_parse_config(void) {
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_cleanup_free_ char *val = NULL;
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const char *log;
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size_t n;
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int r;
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r = parse_env_file(NULL, "/etc/udev/udev.conf", NEWLINE, "udev_log", &val, NULL);
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if (r == -ENOENT || !val)
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return 0;
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if (r < 0)
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return r;
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/* unquote */
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n = strlen(val);
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if (n >= 2 &&
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((val[0] == '"' && val[n-1] == '"') ||
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(val[0] == '\'' && val[n-1] == '\''))) {
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val[n - 1] = '\0';
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log = val + 1;
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} else
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log = val;
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/* we set the udev log level here explicitly, this is supposed
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* to regulate the code in libudev/ and udev/. */
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r = log_set_max_level_from_string_realm(LOG_REALM_UDEV, log);
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if (r < 0)
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log_debug_errno(r, "/etc/udev/udev.conf: failed to set udev log level '%s', ignoring: %m", log);
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return 0;
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}
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int udev_device_new_from_stat_rdev(struct udev *udev, const struct stat *st, struct udev_device **ret) {
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struct udev_device *nd;
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char type;
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assert(udev);
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assert(st);
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assert(ret);
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if (S_ISBLK(st->st_mode))
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type = 'b';
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else if (S_ISCHR(st->st_mode))
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type = 'c';
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else
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return -ENOTTY;
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nd = udev_device_new_from_devnum(udev, type, st->st_rdev);
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if (!nd)
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return -errno;
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*ret = nd;
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return 0;
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}
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