copy uid, gid, permissions, and timestamps

[adammoody]

If AXL_COPY_METADATA=1, then copy file metadata, including uid, gid, permissions, and timestamps.

This only applies to pthread and sync so far, with the assumption that IBM BB and Cray Datawarp may already be copying this metadata. If not, it can be added to those.

Resolves: https://github.com/ECP-VeloC/AXL/issues/41

[tonyhutter]

Would you mind including this patch as well? It add flags to axl_cp to preserve timestamps/permissions.

diff --git a/test/axl_cp.c b/test/axl_cp.c
index 44d1516..62e0a11 100644
--- a/test/axl_cp.c
+++ b/test/axl_cp.c
@@ -6,9 +6,11 @@
 #include <errno.h>
 #include <sys/stat.h>
 #include <signal.h>
+#include <stdlib.h>
 #include "axl.h"

 int id = -1;
+char *old_env = NULL;

 /* Return 1 if path is a directory */
 static int
@@ -51,9 +53,11 @@ axl_xfer_str_to_xfer(const char *xfer_str)
 static void
 usage(void)
 {
-    printf("Usage: axl_cp [-r|-R] [-X xfer_type] SOURCE DEST\n");
-    printf("       axl_cp [-r|-R] [-X xfer_type] SOURCE... DIRECTORY\n");
+    printf("Usage: axl_cp [-ap] [-r|-R] [-X xfer_type] SOURCE DEST\n");
+    printf("       axl_cp [-ap] [-r|-R] [-X xfer_type] SOURCE... DIRECTORY\n");
     printf("\n");
+    printf("-a:             Archive mode.  Preserve permissions + times + recursive.  Implies -pr\n");
+    printf("-p:             Preserve permissions + times.\n");
     printf("-r|-R:          Copy directories recursively\n");
     printf("-X xfer_type:   AXL transfer type:  default native pthread sync dw bbapi cppr\n");
     printf("\n");
@@ -86,6 +90,9 @@ void sig_func(int signum)
         exit(rc);
     }

+    if (old_env)
+        setenv("AXL_COPY_METADATA", old_env, 1);
+
     exit(AXL_SUCCESS);
 }

@@ -107,9 +114,17 @@ main(int argc, char **argv) {
     action.sa_handler = sig_func;
     sigaction(SIGTERM, &action, NULL);
     char *state_file = NULL;
+    int preserve = 0;

-    while ((opt = getopt(argc, argv, "rRSX:")) != -1) {
+    while ((opt = getopt(argc, argv, "aprRSX:")) != -1) {
         switch (opt) {
+            case 'p':
+                preserve = 1;
+                break;
+            case 'a':
+                preserve = 1;
+                recursive = 1;
+                break;
             case 'X':
                 xfer_str = optarg;
                 break;
@@ -125,6 +140,10 @@ main(int argc, char **argv) {
                 exit(1);
         }
     }
+
+    if (preserve)
+       old_env = getenv("AXL_COPY_METADATA");
+
     args_left = argc - optind;

     /* Did they specify source(s) and destination? */
@@ -163,6 +182,9 @@ main(int argc, char **argv) {
         xfer = AXL_XFER_SYNC;
     }

+    if (preserve)
+        setenv("AXL_COPY_METADATA", "1", 1);
+
     rc = AXL_Init(state_file);
     if (rc != AXL_SUCCESS) {
         printf("AXL_Init() failed (error %d)\n", rc);
@@ -212,5 +234,8 @@ main(int argc, char **argv) {
         return rc;
     }

+    if (old_env)
+        setenv("AXL_COPY_METADATA", old_env, 1);
+
     return AXL_SUCCESS;
 }

[adammoody]

@tonyhutter , yeah that's good. Thanks. Go ahead and directly push that commit to the existing metadata branch.

[tonyhutter]

Thanks, pushed.

[adammoody]

Thanks for adding your patch, @tonyhutter !