xenstore-chmod: handle arbitrary number of perms rather than MAX_PERMS constant

Constant MAX_PERMS 16 is too small to use in some occasions, e.g. if
there are more than 16 domU(s) on one hypervisor (it's easy to
achieve) and one wants to do xenstore-chmod PATH to all domU(s). So,
remove MAX_PERMS limitation and make it as arbitrary number of perms.

Signed-off-by: Chunyan Liu <cyliu@suse.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/tools/xenstore/xenstore_client.c b/tools/xenstore/xenstore_client.c
index 37b1bc65e19ac046a670df9485a5d4cfa7d750bb..3ac214b7aff67a643b8fe55fa482d92426a7048e 100644 (file)
--- a/tools/xenstore/xenstore_client.c
+++ b/tools/xenstore/xenstore_client.c
@@ -25,7 +25,6 @@
 #define PATH_SEP '/'
 #define MAX_PATH_LEN 256
 
-#define MAX_PERMS 16
 
 enum mode {
     MODE_unknown,
@@ -407,44 +406,41 @@ perform(enum mode mode, int optind, int argc, char **argv, struct xs_handle *xsh
                 output("%s\n", list[i]);
             }
             free(list);
-           optind++;
-           break;
-       }
-       case MODE_ls: {
-           do_ls(xsh, argv[optind], 0, prefix);
-           optind++;
-           break;
+            optind++;
+            break;
+        }
+        case MODE_ls: {
+            do_ls(xsh, argv[optind], 0, prefix);
+            optind++;
+            break;
         }
         case MODE_chmod: {
-            struct xs_permissions perms[MAX_PERMS];
-            int nperms = 0;
             /* save path pointer: */
             char *path = argv[optind++];
-            for (; argv[optind]; optind++, nperms++)
+            int nperms = argc - optind;
+            struct xs_permissions perms[nperms];
+            int i;
+            for (i = 0; argv[optind]; optind++, i++)
             {
-                if (MAX_PERMS <= nperms)
-                    errx(1, "Too many permissions specified.  "
-                        "Maximum per invocation is %d.", MAX_PERMS);
-
-                perms[nperms].id = atoi(argv[optind]+1);
+                perms[i].id = atoi(argv[optind]+1);
 
                 switch (argv[optind][0])
                 {
                 case 'n':
-                    perms[nperms].perms = XS_PERM_NONE;
+                    perms[i].perms = XS_PERM_NONE;
                     break;
                 case 'r':
-                    perms[nperms].perms = XS_PERM_READ;
+                    perms[i].perms = XS_PERM_READ;
                     break;
                 case 'w':
-                    perms[nperms].perms = XS_PERM_WRITE;
+                    perms[i].perms = XS_PERM_WRITE;
                     break;
                 case 'b':
-                    perms[nperms].perms = XS_PERM_READ | XS_PERM_WRITE;
+                    perms[i].perms = XS_PERM_READ | XS_PERM_WRITE;
                     break;
                 default:
                     errx(1, "Invalid permission specification: '%c'",
-                        argv[optind][0]);
+                         argv[optind][0]);
                 }
             }