Last change
on this file since 3879 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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File size:
1.0 KB
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[3621] | 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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