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authorLennart Poettering <lennart@poettering.net>2015-01-14 02:21:51 +0100
committerLennart Poettering <lennart@poettering.net>2015-01-14 23:18:33 +0100
commit01b725684f6ba54f0db815669e4e07eb0e02fedb (patch)
tree26dc8954b513cbc33347f3c9ae1fbbfc0a776f7e /src/shared/util.c
parent45030287af1e8e76b0feb1cfc3011a0ef2b37d0d (diff)
machined: use the FS_IMMUTABLE_FL file flag, if available, to implement a "read-only" concept for raw disk images, too
Diffstat (limited to 'src/shared/util.c')
-rw-r--r--src/shared/util.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/src/shared/util.c b/src/shared/util.c
index 9fd2d89556..857bb1b726 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -7791,9 +7791,31 @@ int chattr_path(const char *p, bool b, unsigned mask) {
if (mask == 0)
return 0;
- fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
+ fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
if (fd < 0)
return -errno;
return chattr_fd(fd, b, mask);
}
+
+int read_attr_fd(int fd, unsigned *ret) {
+ assert(fd >= 0);
+
+ if (ioctl(fd, FS_IOC_GETFLAGS, ret) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int read_attr_path(const char *p, unsigned *ret) {
+ _cleanup_close_ int fd = -1;
+
+ assert(p);
+ assert(ret);
+
+ fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
+ if (fd < 0)
+ return -errno;
+
+ return read_attr_fd(fd, ret);
+}