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libutil: add function to get base device for blockdevice

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Some operations are only possible on base devices not on partitions.
Add functions to determine if a given device is a partition or a base
device and to get the base device to a given partition.

Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Stefan Haberland
2020-07-29 11:24:55 +02:00
committed by Jan Höppner
parent 7eb04cdc54
commit fa7a4dafa3
2 changed files with 102 additions and 0 deletions
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include/lib/util_sys.h
+5
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@@ -12,6 +12,11 @@
#ifndef LIB_UTIL_SYS_H
#define LIB_UTIL_SYS_H
#include <stdbool.h>
int util_sys_get_dev_addr(const char *dev, char *addr);
bool util_sys_dev_is_partition(dev_t dev);
int util_sys_get_partnum(dev_t dev);
int util_sys_get_base_dev(dev_t dev, dev_t *base_dev);
#endif /** LIB_UTIL_SYS_H @} */