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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) 2016 Denys Vlasenko
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
//kbuild:lib-y += ubi.o
#include "libbb.h"
// from ubi-media.h
#define UBI_MAX_VOLUME_NAME 127
#define UBI_MAX_VOLUMES 128
unsigned FAST_FUNC ubi_devnum_from_devname(const char *str)
{
unsigned ubi_devnum;
if (sscanf(str, "/dev/ubi%u", &ubi_devnum) != 1)
bb_error_msg_and_die("not an UBI device: '%s'", str);
return ubi_devnum;
}
int FAST_FUNC ubi_get_volid_by_name(unsigned ubi_devnum, const char *vol_name)
{
unsigned i;
for (i = 0; i < UBI_MAX_VOLUMES; i++) {
char buf[UBI_MAX_VOLUME_NAME + 1];
char fname[sizeof("/sys/class/ubi/ubi%u_%u/name") + 2 * sizeof(int)*3];
sprintf(fname, "/sys/class/ubi/ubi%u_%u/name", ubi_devnum, i);
if (open_read_close(fname, buf, sizeof(buf)) <= 0)
continue;
buf[UBI_MAX_VOLUME_NAME] = '\0';
strchrnul(buf, '\n')[0] = '\0';
if (strcmp(vol_name, buf) == 0)
return i;
}
bb_error_msg_and_die("volume '%s' not found", vol_name);
}
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