Last change
on this file since 3737 was 3621, checked in by Bruno Cornec, 8 years ago |
New 3?3 banch for incorporation of latest busybox 1.25. Changing minor version to handle potential incompatibilities.
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1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Utility routines.
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4 | *
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5 | * Copyright (C) 2016 Denys Vlasenko
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6 | *
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7 | * Licensed under GPLv2, see file LICENSE in this source tree.
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8 | */
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9 | //kbuild:lib-y += ubi.o
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10 |
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11 | #include "libbb.h"
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12 |
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13 | // from ubi-media.h
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14 | #define UBI_MAX_VOLUME_NAME 127
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15 | #define UBI_MAX_VOLUMES 128
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16 |
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17 | unsigned FAST_FUNC ubi_devnum_from_devname(const char *str)
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18 | {
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19 | unsigned ubi_devnum;
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20 |
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21 | if (sscanf(str, "/dev/ubi%u", &ubi_devnum) != 1)
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22 | bb_error_msg_and_die("not an UBI device: '%s'", str);
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23 | return ubi_devnum;
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24 | }
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25 |
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26 | int FAST_FUNC ubi_get_volid_by_name(unsigned ubi_devnum, const char *vol_name)
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27 | {
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28 | unsigned i;
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29 |
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30 | for (i = 0; i < UBI_MAX_VOLUMES; i++) {
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31 | char buf[UBI_MAX_VOLUME_NAME + 1];
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32 | char fname[sizeof("/sys/class/ubi/ubi%u_%u/name") + 2 * sizeof(int)*3];
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33 |
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34 | sprintf(fname, "/sys/class/ubi/ubi%u_%u/name", ubi_devnum, i);
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35 | if (open_read_close(fname, buf, sizeof(buf)) <= 0)
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36 | continue;
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37 |
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38 | strchrnul(buf, '\n')[0] = '\0';
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39 | if (strcmp(vol_name, buf) == 0)
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40 | return i;
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41 | }
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42 | bb_error_msg_and_die("volume '%s' not found", vol_name);
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43 | }
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