diff options
| -rw-r--r-- | sys/src/cmd/ptrap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/cmd/ptrap.c b/sys/src/cmd/ptrap.c index 30a4db07f..7cf60f7d4 100644 --- a/sys/src/cmd/ptrap.c +++ b/sys/src/cmd/ptrap.c @@ -356,7 +356,7 @@ threadmain(int argc, char **argv) default: usage(); }ARGEND; - if(argc % 2) usage(); + if(argc == 0 || argc % 2) usage(); for(i = 0; i < argc; i += 2){ f = emalloc9p(sizeof(PFilter)); f->name = strdup(argv[i]); |