b=14471

i=nathan, andreas
To add -N option in lctl get_param which will print only path names.

lustre/utils/lctl.c

@@ -120,9 +120,10 @@ command_t cmdlist[] = {
         {"local_param", jt_lcfg_param, 0, "set a temporary, local param\n"
          "usage: local_param <target.keyword=val> ...\n"},
         {"get_param", jt_lcfg_getparam, 0, "get the Lustre or LNET parameter\n"
-         "usage: get_param [-n] path/to/param/file \n"
+         "usage: get_param [-n | -N] path/to/param/file \n"
          "Get the value of Lustre or LNET parameter from the specified path\n"
-         "Use '-n' to disable printing of the key name when printing values."},
+         "Use '-n' to disable printing of the key name when printing values.\n"
+         "Use '-N' to print only path names and not the values."},
         {"set_param", jt_lcfg_setparam, 0, "set the Lustre or LNET parameter\n"
          "usage: set_param [-n] path/to/param/file value\n"
          "Set the value of the Lustre or LNET parameter at the specified path\n"

lustre/utils/lustre_cfg.c

@@ -547,13 +547,18 @@ static char *strnchr(const char *p, char c, size_t n)
 int jt_lcfg_getparam(int argc, char **argv)
 {
         int fp;
-        int rc = 0, i, show_path = 0;
+        int rc = 0, i, show_path = 0, only_path = 0;
         char pattern[PATH_MAX];
         char *path, *tmp, *buf;
         glob_t glob_info;
 
-        if (argc == 3 && strcmp(argv[1], "-n") == 0) {
+        if (argc == 3 && (strcmp(argv[1], "-n") == 0 ||
+                          strcmp(argv[1], "-N") == 0)) {
                 path = argv[2];
+                if (strcmp(argv[1], "-N") == 0) {
+                        only_path = 1;
+                        show_path = 1;
+                }
         } else if (argc == 2) {
                 show_path = 1;
                 path = argv[1];
@@ -596,6 +601,10 @@ int jt_lcfg_getparam(int argc, char **argv)
                         char *filename;
                         filename = strdup(glob_info.gl_pathv[i]);
                         valuename = display_name(filename);
+                        if (valuename && only_path) {
+                                printf("%s\n", valuename);
+                                continue;
+                        }
                 }
 
                 /* Write the contents of file to stdout */