Patch adds a simple mechanism to write a value to sysfs file giving its
full path. Existing methods need eg. mdinfo available what is not always necessary/available.
Signed-off-by: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@xxxxxxxxx>
---
mdadm.h | 1 +
sysfs.c | 21 +++++++++++++++++++++
2 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/mdadm.h b/mdadm.h
index 402a8c6..304378a 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -419,6 +419,7 @@ extern int sysfs_attr_match(const char *attr, const char *str);
extern int sysfs_match_word(const char *word, char **list);
extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
char *name, char *val);
+extern int sysfs_set_str_simple(char *fname, char *val);
extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
char *name, unsigned long long val);
extern int sysfs_uevent(struct mdinfo *sra, char *event);
diff --git a/sysfs.c b/sysfs.c
index ebf9d8a..a2353d9 100644
--- a/sysfs.c
+++ b/sysfs.c
@@ -413,6 +413,27 @@ int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
return 0;
}
+int sysfs_set_str_simple(char *fname, char *val)
+{
+ int n;
+ int fd;
+
+ if (!fname || !val)
+ return 1;
+
+ fd = open(fname, O_WRONLY | O_NONBLOCK);
+ if (fd < 0)
+ return -1;
+ n = write(fd, val, strlen(val));
+ close(fd);
+ if (n != strlen(val)) {
+ dprintf(Name ": failed to write '%s' to '%s' (%s)\n",
+ val, fname, strerror(errno));
+ return -1;
+ }
+ return 0;
+}
+
int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
char *name, unsigned long long val)
{
--
1.6.4.2
--
Best Regards,
Przemyslaw Hawrylewicz-Czarnowski
Software Development Engineer
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