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authorDenis Vlasenko2006-12-26 01:30:59 +0000
committerDenis Vlasenko2006-12-26 01:30:59 +0000
commitc4f623ef2a7980a63de7c9f1d539a656b83f10e7 (patch)
treea294e28b0112052cb9d58b403554b3390e76f50c /e2fsprogs/old_e2fsprogs/e2p/uuid.c
parent64c54025842f205ad722675105b88044a5b6845a (diff)
downloadbusybox-c4f623ef2a7980a63de7c9f1d539a656b83f10e7.zip
busybox-c4f623ef2a7980a63de7c9f1d539a656b83f10e7.tar.gz
put small subset of e2fsprogs back in the tree:
lsattr, chattr, fsck. Old e2fsprogs tree is in e2fsprogs/old_e2fsprogs/*.
Diffstat (limited to 'e2fsprogs/old_e2fsprogs/e2p/uuid.c')
-rw-r--r--e2fsprogs/old_e2fsprogs/e2p/uuid.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/e2fsprogs/old_e2fsprogs/e2p/uuid.c b/e2fsprogs/old_e2fsprogs/e2p/uuid.c
new file mode 100644
index 0000000..474d64a
--- /dev/null
+++ b/e2fsprogs/old_e2fsprogs/e2p/uuid.c
@@ -0,0 +1,78 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * uuid.c -- utility routines for manipulating UUID's.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "../ext2fs/ext2_types.h"
+
+#include "e2p.h"
+
+struct uuid {
+ __u32 time_low;
+ __u16 time_mid;
+ __u16 time_hi_and_version;
+ __u16 clock_seq;
+ __u8 node[6];
+};
+
+/* Returns 1 if the uuid is the NULL uuid */
+int e2p_is_null_uuid(void *uu)
+{
+ __u8 *cp;
+ int i;
+
+ for (i=0, cp = uu; i < 16; i++)
+ if (*cp)
+ return 0;
+ return 1;
+}
+
+static void e2p_unpack_uuid(void *in, struct uuid *uu)
+{
+ __u8 *ptr = in;
+ __u32 tmp;
+
+ tmp = *ptr++;
+ tmp = (tmp << 8) | *ptr++;
+ tmp = (tmp << 8) | *ptr++;
+ tmp = (tmp << 8) | *ptr++;
+ uu->time_low = tmp;
+
+ tmp = *ptr++;
+ tmp = (tmp << 8) | *ptr++;
+ uu->time_mid = tmp;
+
+ tmp = *ptr++;
+ tmp = (tmp << 8) | *ptr++;
+ uu->time_hi_and_version = tmp;
+
+ tmp = *ptr++;
+ tmp = (tmp << 8) | *ptr++;
+ uu->clock_seq = tmp;
+
+ memcpy(uu->node, ptr, 6);
+}
+
+void e2p_uuid_to_str(void *uu, char *out)
+{
+ struct uuid uuid;
+
+ e2p_unpack_uuid(uu, &uuid);
+ sprintf(out,
+ "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+ uuid.time_low, uuid.time_mid, uuid.time_hi_and_version,
+ uuid.clock_seq >> 8, uuid.clock_seq & 0xFF,
+ uuid.node[0], uuid.node[1], uuid.node[2],
+ uuid.node[3], uuid.node[4], uuid.node[5]);
+}
+
+const char *e2p_uuid2str(void *uu)
+{
+ static char buf[80];
+ if (e2p_is_null_uuid(uu))
+ return "<none>";
+ e2p_uuid_to_str(uu, buf);
+ return buf;
+}