63c372cb9d
After all it is now much more like strjoin() than strappend(). At the same time, add support for NULL sentinels, even if they are normally not necessary.
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/*
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* Copyright (C) 2008-2009 Kay Sievers <kay@vrfy.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "udevadm-util.h"
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struct udev_device *find_device(struct udev *udev,
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const char *id,
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const char *prefix) {
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assert(udev);
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assert(id);
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if (prefix && !startswith(id, prefix))
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id = strjoina(prefix, id);
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if (startswith(id, "/dev/")) {
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struct stat statbuf;
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char type;
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if (stat(id, &statbuf) < 0)
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return NULL;
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if (S_ISBLK(statbuf.st_mode))
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type = 'b';
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else if (S_ISCHR(statbuf.st_mode))
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type = 'c';
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else
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return NULL;
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return udev_device_new_from_devnum(udev, type, statbuf.st_rdev);
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} else if (startswith(id, "/sys/"))
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return udev_device_new_from_syspath(udev, id);
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else
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return NULL;
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}
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