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authorLennart Poettering <lennart@poettering.net>2014-12-24 16:39:55 +0100
committerLennart Poettering <lennart@poettering.net>2014-12-24 16:53:04 +0100
commit4a4d89b682d2a8d32e899c4b47950f64df74fb7c (patch)
treea76ee43721157dbbbe53ce1bd0c2db000ab6689f /src/shared/util.c
parentde33fc625725d199629ed074d6278504deb23deb (diff)
util: make creation time xattr logic more generic
Diffstat (limited to 'src/shared/util.c')
-rw-r--r--src/shared/util.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/src/shared/util.c b/src/shared/util.c
index e95f6ed247..98b3465d4a 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -59,6 +59,7 @@
#include <langinfo.h>
#include <locale.h>
#include <sys/personality.h>
+#include <sys/xattr.h>
#include <libgen.h>
#undef basename
@@ -84,6 +85,7 @@
#include "gunicode.h"
#include "virt.h"
#include "def.h"
+#include "sparse-endian.h"
int saved_argc = 0;
char **saved_argv = NULL;
@@ -7558,3 +7560,62 @@ int openpt_in_namespace(pid_t pid, int flags) {
return -EIO;
}
+
+int fd_getcrtime(int fd, usec_t *usec) {
+ uint64_t u;
+ le64_t le;
+ ssize_t n;
+
+ assert(fd >= 0);
+ assert(usec);
+
+ /* Until Linux gets a real concept of birthtime/creation time,
+ * let's fake one with xattrs */
+
+ n = fgetxattr(fd, "user.crtime_usec", &le, sizeof(le));
+ if (n < 0)
+ return -errno;
+ if (n != sizeof(le))
+ return -EIO;
+
+ u = le64toh(le);
+ if (u == 0 || u == (uint64_t) -1)
+ return -EIO;
+
+ *usec = (usec_t) u;
+ return 0;
+}
+
+int path_getcrtime(const char *p, usec_t *usec) {
+ uint64_t u;
+ le64_t le;
+ ssize_t n;
+
+ assert(p);
+ assert(usec);
+
+ n = getxattr(p, "user.crtime_usec", &le, sizeof(le));
+ if (n < 0)
+ return -errno;
+ if (n != sizeof(le))
+ return -EIO;
+
+ u = le64toh(le);
+ if (u == 0 || u == (uint64_t) -1)
+ return -EIO;
+
+ *usec = (usec_t) u;
+ return 0;
+}
+
+int fd_setcrtime(int fd, usec_t usec) {
+ le64_t le;
+
+ assert(fd >= 0);
+
+ le = htole64((uint64_t) usec);
+ if (fsetxattr(fd, "user.crtime_usec", &le, sizeof(le), XATTR_CREATE) < 0)
+ return -errno;
+
+ return 0;
+}