xl: fix incorrect display of illegal option character

according to the getopt(3) manpage (and to my testing) getopt returns
'?' if an unknown option character is found and stores the insulting
character in optopt.
This patch fixes the broken output in such a situation:

root@dosorca:/data/images# xl vcpu-list -j
option `?' not supported.
Name                  ID  VCPU   CPU State   Time(s) CPU Affinity
Domain-0               0     0    0   -b-     193.1  any cpu

turns into:

root@dosorca:/data/images# xl vcpu-list -j
option `j' not supported.
Name                  ID  VCPU   CPU State   Time(s) CPU Affinity
Domain-0               0     0    0   -b-     193.1  any cpu

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

1 files changed, 35 insertions, 35 deletions

diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index be0145d12a..beece547a8 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -2974,7 +2974,7 @@ int main_dump_core(int argc, char **argv)
             help("dump-core");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -3481,7 +3481,7 @@ int main_vcpulist(int argc, char **argv)
             help("vcpu-list");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -3572,7 +3572,7 @@ int main_vcpupin(int argc, char **argv)
             help("vcpu-pin");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -3617,7 +3617,7 @@ int main_vcpuset(int argc, char **argv)
         help("vcpu-set");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -3781,7 +3781,7 @@ int main_info(int argc, char **argv)
             numa = 1;
             break;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -3853,7 +3853,7 @@ int main_sched_credit(int argc, char **argv)
             help("sched-credit");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -3912,7 +3912,7 @@ int main_domid(int argc, char **argv)
             help("domid");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -3946,7 +3946,7 @@ int main_domname(int argc, char **argv)
             help("domname");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -3987,7 +3987,7 @@ int main_rename(int argc, char **argv)
             help("rename");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4024,7 +4024,7 @@ int main_trigger(int argc, char **argv)
             help("trigger");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4065,7 +4065,7 @@ int main_sysrq(int argc, char **argv)
             help("sysrq");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4165,7 +4165,7 @@ int main_top(int argc, char **argv)
             help("top");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4188,7 +4188,7 @@ int main_networkattach(int argc, char **argv)
             help("network-attach");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4269,7 +4269,7 @@ int main_networklist(int argc, char **argv)
                 help("network-list");
                 return 0;
             default:
-                fprintf(stderr, "option `%c' not supported.\n", opt);
+                fprintf(stderr, "option `%c' not supported.\n", optopt);
                 break;
         }
     }
@@ -4318,7 +4318,7 @@ int main_networkdetach(int argc, char **argv)
             help("network-detach");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4364,7 +4364,7 @@ int main_blockattach(int argc, char **argv)
             help("block-attach");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4437,7 +4437,7 @@ int main_blocklist(int argc, char **argv)
             help("block-list");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4483,7 +4483,7 @@ int main_blockdetach(int argc, char **argv)
             help("block-detach");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4522,7 +4522,7 @@ int main_network2attach(int argc, char **argv)
             help("network2-attach");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4615,7 +4615,7 @@ int main_network2list(int argc, char **argv)
             help("network2-list");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4659,7 +4659,7 @@ int main_network2detach(int argc, char **argv)
             help("network2-detach");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4858,7 +4858,7 @@ int main_uptime(int argc, char **argv)
             help("uptime");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4893,7 +4893,7 @@ int main_tmem_list(int argc, char **argv)
             help("tmem-list");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4934,7 +4934,7 @@ int main_tmem_freeze(int argc, char **argv)
             help("tmem-freeze");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -4970,7 +4970,7 @@ int main_tmem_destroy(int argc, char **argv)
             help("tmem-destroy");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -5006,7 +5006,7 @@ int main_tmem_thaw(int argc, char **argv)
             help("tmem-thaw");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -5056,7 +5056,7 @@ int main_tmem_set(int argc, char **argv)
             help("tmem-set");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -5114,7 +5114,7 @@ int main_tmem_shared_auth(int argc, char **argv)
             help("tmem-shared-auth");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -5159,7 +5159,7 @@ int main_tmem_freeable(int argc, char **argv)
             help("tmem-freeable");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -5487,7 +5487,7 @@ int main_cpupooldestroy(int argc, char **argv)
             help("cpupool-destroy");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -5521,7 +5521,7 @@ int main_cpupoolrename(int argc, char **argv)
             help("cpupool-rename");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -5564,7 +5564,7 @@ int main_cpupoolcpuadd(int argc, char **argv)
             help("cpupool-cpu-add");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -5627,7 +5627,7 @@ int main_cpupoolcpuremove(int argc, char **argv)
             help("cpupool-cpu-remove");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -5689,7 +5689,7 @@ int main_cpupoolmigrate(int argc, char **argv)
             help("cpupool-migrate");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }
@@ -5746,7 +5746,7 @@ int main_cpupoolnumasplit(int argc, char **argv)
             help("cpupool-numa-split");
             return 0;
         default:
-            fprintf(stderr, "option `%c' not supported.\n", opt);
+            fprintf(stderr, "option `%c' not supported.\n", optopt);
             break;
         }
     }