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-rw-r--r--src/shared/util.c22
-rw-r--r--src/shared/util.h1
2 files changed, 23 insertions, 0 deletions
diff --git a/src/shared/util.c b/src/shared/util.c
index 5cbbe8fb7d..ad548da82a 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -7843,6 +7843,28 @@ int chattr_path(const char *p, bool b, unsigned mask) {
return chattr_fd(fd, b, mask);
}
+int change_attr_fd(int fd, unsigned value, unsigned mask) {
+ unsigned old_attr, new_attr;
+
+ assert(fd >= 0);
+
+ if (mask == 0)
+ return 0;
+
+ if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
+ return -errno;
+
+ new_attr = (old_attr & ~mask) |(value & mask);
+
+ if (new_attr == old_attr)
+ return 0;
+
+ if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0)
+ return -errno;
+
+ return 0;
+}
+
int read_attr_fd(int fd, unsigned *ret) {
assert(fd >= 0);
diff --git a/src/shared/util.h b/src/shared/util.h
index d229e1e68c..29e85bb7e1 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -1053,6 +1053,7 @@ int same_fd(int a, int b);
int chattr_fd(int fd, bool b, unsigned mask);
int chattr_path(const char *p, bool b, unsigned mask);
+int change_attr_fd(int fd, unsigned value, unsigned mask);
int read_attr_fd(int fd, unsigned *ret);
int read_attr_path(const char *p, unsigned *ret);