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mdadm/lib: Define a new helper function is_dev_alived 

The function is used to check if one member disk is alive.

Signed-off-by: Xiao Ni <xni@redhat.com>
Acked-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
This commit is contained in:
Xiao Ni 2021-10-27 20:23:13 +08:00 committed by Jes Sorensen
parent 1c66260df6
commit a35aa68fef
2 changed files with 13 additions and 0 deletions
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11
lib.c
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@ -27,6 +27,17 @@
#include <ctype.h>
#include <limits.h>
bool is_dev_alive(char *path)
{
if (!path)
return false;
if (access(path, R_OK) == 0)
return true;
return false;
}
/* This fill contains various 'library' style function. They
* have no dependency on anything outside this file.
*/

2
mdadm.h
View File

@ -45,6 +45,7 @@ extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
#include <errno.h>
#include <string.h>
#include <syslog.h>
#include <stdbool.h>
/* Newer glibc requires sys/sysmacros.h directly for makedev() */
#include <sys/sysmacros.h>
#ifdef __dietlibc__
@ -1499,6 +1500,7 @@ extern int check_partitions(int fd, char *dname,
extern int fstat_is_blkdev(int fd, char *devname, dev_t *rdev);
extern int stat_is_blkdev(char *devname, dev_t *rdev);
extern bool is_dev_alive(char *path);
extern int get_mdp_major(void);
extern int get_maj_min(char *dev, int *major, int *minor);
extern int dev_open(char *dev, int flags);