vos: complain if no fields are passed

to vos "setfields". It might be a misleading if it exists
sucessfully when clearly invoked wrongly.

Change-Id: Ic92f4e17fde0a0dfc182f9713350800c72fa165e
Reviewed-on: http://gerrit.openafs.org/10271
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>

diff --git a/src/volser/vos.c b/src/volser/vos.c
index b0368d4..4e1a743 100644 (file)
--- a/src/volser/vos.c
+++ b/src/volser/vos.c
@@ -1714,6 +1714,7 @@ SetFields(struct cmd_syndesc *as, void *arock)
     afs_uint32 aserver;
     afs_int32 apart;
     int previdx = -1;
+    int have_field = 0;
 
     volid = vsu_GetVolumeID(as->parms[0].items->data, cstruct, &err);  /* -id */
     if (volid == 0) {
@@ -1747,6 +1748,7 @@ SetFields(struct cmd_syndesc *as, void *arock)
 
     if (as->parms[1].items) {
        /* -max <quota> */
+       have_field = 1;
        code = util_GetHumanInt32(as->parms[1].items->data, &info.maxquota);
        if (code) {
            fprintf(STDERR, "invalid quota value\n");
@@ -1755,12 +1757,18 @@ SetFields(struct cmd_syndesc *as, void *arock)
     }
     if (as->parms[2].items) {
        /* -clearuse */
+       have_field = 1;
        info.dayUse = 0;
     }
     if (as->parms[3].items) {
        /* -clearVolUpCounter */
+       have_field = 1;
        info.spare2 = 0;
     }
+    if (!have_field) {
+       fprintf(STDERR,"Nothing to set.\n");
+       return (1);
+    }
     code = UV_SetVolumeInfo(aserver, apart, volid, &info);
     if (code)
        fprintf(STDERR,