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40be6307ec005539635e7b8fcef67e989dc441f6
xen/tools/xl/xl_cmdtable.c
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Michal Orzel d8c3ff585b tools/xl: Guard main_dt_overlay() with LIBXL_HAVE_DT_OVERLAY 
main_dt_overlay() makes a call to libxl_dt_overlay() which is for now
only compiled for Arm. This causes the build failure as reported by
gitlab CI and OSSTEST. Fix it by guarding the function, prototype and
entry in cmd_table[] using LIBXL_HAVE_DT_OVERLAY. This has an advantage
over regular Arm guard so that the code will not need to be modified again
if other architecture gain support for this feature.

Fixes: 61765a07e3 ("tools/xl: Add new xl command overlay for device tree overlay support")
Reported-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Michal Orzel <michal.orzel@amd.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
2023-09-06 14:56:09 +02:00

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/*
* Copyright 2009-2017 Citrix Ltd and other contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; version 2.1 only. with the special
* exception on linking described in file LICENSE.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*/
#include <string.h>
#include <libxl.h>
#include <xen-tools/common-macros.h>
#include "xl.h"
const struct cmd_spec cmd_table[] = {
{ "create",
&main_create, 1, 1,
"Create a domain from config file <filename>",
"<ConfigFile> [options] [vars]",
"-c Connect to the console after the domain is created.\n"
"-d Enable debug messages.\n"
"-e Do not wait in the background for the death of the domain.\n"
"-F Run in foreground until death of the domain.\n"
"-f FILE, --defconfig=FILE\n Use the given configuration file.\n"
"-h Print this help.\n"
"-n, --dryrun Dry run - prints the resulting configuration\n"
" (deprecated in favour of global -N option).\n"
"-p Leave the domain paused after it is created.\n"
"-q, --quiet Quiet.\n"
"-V, --vncviewer Connect to the VNC display after the domain is created.\n"
"-A, --vncviewer-autopass\n"
" Pass VNC password to viewer via stdin.\n"
"--ignore-global-affinity-masks Ignore global masks in xl.conf."
},
{ "config-update",
&main_config_update, 1, 1,
"Update a running domain's saved configuration, used when rebuilding "
"the domain after reboot.\n"
"WARNING: xl now has better capability to manage domain configuration, "
"avoid using this command when possible",
"<Domain> <ConfigFile> [options] [vars]",
"-h Print this help.\n"
"-f FILE, --defconfig=FILE\n Use the given configuration file.\n"
"-d Enable debug messages.\n"
},
{ "list",
&main_list, 0, 0,
"List information about all/some domains",
"[options] [Domain]\n",
"-l, --long Output all VM details\n"
"-v, --verbose Prints out UUIDs and security context\n"
"-Z, --context Prints out security context\n"
"-c, --cpupool Prints the cpupool the domain is in\n"
"-n, --numa Prints out NUMA node affinity"
},
{ "destroy",
&main_destroy, 0, 1,
"Terminate a domain immediately",
"[options] <Domain>\n",
"-f Permit destroying domain 0, which will only succeed\n"
" when run from disaggregated toolstack domain with a\n"
" hardware domain distinct from domain 0."
},
{ "shutdown",
&main_shutdown, 0, 1,
"Issue a shutdown signal to a domain",
"[options] <-a|Domain>",
"-a, --all Shutdown all guest domains.\n"
"-h Print this help.\n"
"-F Fallback to ACPI power event for HVM guests with\n"
" no PV drivers.\n"
"-w, --wait Wait for guest(s) to shutdown.\n"
},
{ "reboot",
&main_reboot, 0, 1,
"Issue a reboot signal to a domain",
"[options] <-a|Domain>",
"-a, --all Shutdown all guest domains.\n"
"-h Print this help.\n"
"-F Fallback to ACPI reset event for HVM guests with\n"
" no PV drivers.\n"
"-w, --wait Wait for guest(s) to reboot.\n"
},
{ "pci-attach",
&main_pciattach, 0, 1,
"Insert a new pass-through pci device",
"<Domain> <PCI_SPEC_STRING>",
},
{ "pci-detach",
&main_pcidetach, 0, 1,
"Remove a domain's pass-through pci device",
"<Domain> <PCI_SPEC_STRING>",
},
{ "pci-list",
&main_pcilist, 0, 0,
"List pass-through pci devices for a domain",
"<Domain>",
},
{ "pci-assignable-add",
&main_pciassignable_add, 0, 1,
"Make a device assignable for pci-passthru",
"[options] <BDF>",
"-n NAME, --name=NAME Name the assignable device.\n"
"-h Print this help.\n"
},
{ "pci-assignable-remove",
&main_pciassignable_remove, 0, 1,
"Remove a device from being assignable",
"[options] <BDF>|NAME",
"-h Print this help.\n"
"-r Attempt to re-assign the device to the\n"
" original driver."
},
{ "pci-assignable-list",
&main_pciassignable_list, 0, 0,
"List all the assignable pci devices",
"[options]",
"-h Print this help.\n"
"-n, --show-names Display assignable device names where\n"
" supplied.\n"
},
{ "pause",
&main_pause, 0, 1,
"Pause execution of a domain",
"<Domain>",
},
{ "unpause",
&main_unpause, 0, 1,
"Unpause a paused domain",
"<Domain>",
},
{ "console",
&main_console, 0, 0,
"Attach to domain's console",
"[options] <Domain>\n"
"-t <type> console type, pv , serial or vuart\n"
"-n <number> console number\n"
"-e <escape> escape character"
},
{ "vncviewer",
&main_vncviewer, 0, 0,
"Attach to domain's VNC server.",
"[options] <Domain>\n"
"--autopass Pass VNC password to viewer via stdin and\n"
" -autopass\n"
"--vncviewer-autopass (consistency alias for --autopass)"
},
#ifndef LIBXL_HAVE_NO_SUSPEND_RESUME
{ "save",
&main_save, 0, 1,
"Save a domain state to restore later",
"[options] <Domain> <CheckpointFile> [<ConfigFile>]",
"-h Print this help.\n"
"-c Leave domain running after creating the snapshot.\n"
"-p Leave domain paused after creating the snapshot.\n"
"-D Store the domain id in the configuration."
},
{ "migrate",
&main_migrate, 0, 1,
"Migrate a domain to another host",
"[options] <Domain> <host>",
"-h Print this help.\n"
"-C <config> Send <config> instead of config file from creation.\n"
"-s <sshcommand> Use <sshcommand> instead of ssh. String will be passed\n"
" to sh. If empty, run <host> instead of ssh <host> xl\n"
" migrate-receive [-d -e]\n"
"-e Do not wait in the background (on <host>) for the death\n"
" of the domain.\n"
"--debug Print huge (!) amount of debug during the migration process.\n"
"-p Do not unpause domain after migrating it.\n"
"-D Preserve the domain id"
},
{ "restore",
&main_restore, 0, 1,
"Restore a domain from a saved state",
"[options] [<ConfigFile>] <CheckpointFile>",
"-h Print this help.\n"
"-p Do not unpause domain after restoring it.\n"
"-e Do not wait in the background for the death of the domain.\n"
"-d Enable debug messages.\n"
"-V, --vncviewer Connect to the VNC display after the domain is created.\n"
"-A, --vncviewer-autopass Pass VNC password to viewer via stdin."
},
{ "migrate-receive",
&main_migrate_receive, 0, 1,
"Restore a domain from a saved state",
"- for internal use only",
},
#endif
{ "dump-core",
&main_dump_core, 0, 1,
"Core dump a domain",
"<Domain> <filename>"
},
{ "cd-insert",
&main_cd_insert, 1, 1,
"Insert a cdrom into a guest's cd drive",
"<Domain> <VirtualDevice> <path>",
},
{ "cd-eject",
&main_cd_eject, 1, 1,
"Eject a cdrom from a guest's cd drive",
"<Domain> <VirtualDevice>",
},
{ "mem-max",
&main_memmax, 0, 1,
"Set the maximum amount reservation for a domain",
"<Domain> <MemMB['b'[bytes]|'k'[KB]|'m'[MB]|'g'[GB]|'t'[TB]]>",
},
{ "mem-set",
&main_memset, 0, 1,
"Set the current memory usage for a domain",
"<Domain> <MemMB['b'[bytes]|'k'[KB]|'m'[MB]|'g'[GB]|'t'[TB]]>",
},
{ "button-press",
&main_button_press, 0, 1,
"Indicate an ACPI button press to the domain",
"<Domain> <Button>",
"<Button> may be 'power' or 'sleep'."
},
{ "vcpu-list",
&main_vcpulist, 0, 0,
"List the VCPUs for all/some domains",
"[Domain, ...]",
},
{ "vcpu-pin",
&main_vcpupin, 1, 1,
"Set which CPUs a VCPU can use",
"[option] <Domain> <VCPU|all> <Hard affinity|-|all> <Soft affinity|-|all>",
"-f, --force undo an override pinning done by the kernel\n"
"--ignore-global-affinity-masks Ignore global masks in xl.conf",
},
{ "vcpu-set",
&main_vcpuset, 0, 1,
"Set the number of active VCPUs allowed for the domain",
"[option] <Domain> <vCPUs>",
"-i, --ignore-host Don't limit the vCPU based on the host CPU count",
},
{ "vm-list",
&main_vm_list, 0, 0,
"List guest domains, excluding dom0, stubdoms, etc.",
"",
},
{ "info",
&main_info, 0, 0,
"Get information about Xen host",
"-n, --numa List host NUMA topology information",
},
{ "sharing",
&main_sharing, 0, 0,
"Get information about page sharing",
"[Domain]",
},
{ "sched-credit",
&main_sched_credit, 0, 1,
"Get/set credit scheduler parameters",
"[-d <Domain> [-w[=WEIGHT]|-c[=CAP]]] [-s [-t TSLICE] [-r RATELIMIT]] [-p CPUPOOL]",
"-d DOMAIN, --domain=DOMAIN Domain to modify\n"
"-w WEIGHT, --weight=WEIGHT Weight (int)\n"
"-c CAP, --cap=CAP Cap (int)\n"
"-s --schedparam Query / modify scheduler parameters\n"
"-t TSLICE, --tslice_ms=TSLICE Set the timeslice, in milliseconds\n"
"-r RLIMIT, --ratelimit_us=RLIMIT Set the scheduling rate limit, in microseconds\n"
"-m DLY, --migration_delay_us=DLY Set the migration delay, in microseconds\n"
"-p CPUPOOL, --cpupool=CPUPOOL Restrict output to CPUPOOL"
},
{ "sched-credit2",
&main_sched_credit2, 0, 1,
"Get/set credit2 scheduler parameters",
"[-d <Domain> [-w[=WEIGHT]]] [-p CPUPOOL]",
"-d DOMAIN, --domain=DOMAIN Domain to modify\n"
"-w WEIGHT, --weight=WEIGHT Weight (int)\n"
"-c CAP, --cap=CAP Cap (int)\n"
"-s --schedparam Query / modify scheduler parameters\n"
"-r RLIMIT, --ratelimit_us=RLIMIT Set the scheduling rate limit, in microseconds\n"
"-p CPUPOOL, --cpupool=CPUPOOL Restrict output to CPUPOOL"
},
{ "sched-rtds",
&main_sched_rtds, 0, 1,
"Get/set rtds scheduler parameters",
"[-d <Domain> [-v[=VCPUID/all]] [-p[=PERIOD]] [-b[=BUDGET]] [-e[=Extratime]]]",
"-d DOMAIN, --domain=DOMAIN Domain to modify\n"
"-v VCPUID/all, --vcpuid=VCPUID/all VCPU to modify or output;\n"
" Using '-v all' to modify/output all vcpus\n"
"-p PERIOD, --period=PERIOD Period (us)\n"
"-b BUDGET, --budget=BUDGET Budget (us)\n"
"-e Extratime, --extratime=Extratime Extratime (1=yes, 0=no)\n"
},
{ "domid",
&main_domid, 0, 0,
"Convert a domain name to domain id",
"<DomainName>",
},
{ "domname",
&main_domname, 0, 0,
"Convert a domain id to domain name",
"<DomainId>",
},
{ "rename",
&main_rename, 0, 1,
"Rename a domain",
"<Domain> <NewDomainName>",
},
{ "trigger",
&main_trigger, 0, 1,
"Send a trigger to a domain",
"<Domain> <nmi|reset|init|power|sleep|s3resume> [<VCPU>]",
},
{ "sysrq",
&main_sysrq, 0, 1,
"Send a sysrq to a domain",
"<Domain> <letter>",
},
{ "debug-keys",
&main_debug_keys, 0, 1,
"Send debug keys to Xen",
"<Keys>",
},
{ "set-parameters",
&main_set_parameters, 0, 1,
"Set hypervisor parameters",
"<Params>",
},
{ "dmesg",
&main_dmesg, 0, 0,
"Read and/or clear dmesg buffer",
"[-c]",
" -c Clear dmesg buffer as well as printing it",
},
{ "top",
&main_top, 0, 0,
"Monitor a host and the domains in real time",
"",
},
{ "network-attach",
&main_networkattach, 1, 1,
"Create a new virtual network device",
"<Domain> [type=<type>] [mac=<mac>] [bridge=<bridge>] "
"[ip=<ip>] [script=<script>] [backend=<BackDomain>] [vifname=<name>] "
"[rate=<rate>] [model=<model>] [accel=<accel>] [mtu=<mtu>]",
},
{ "network-list",
&main_networklist, 0, 0,
"List virtual network interfaces for a domain",
"<Domain(s)>",
},
{ "network-detach",
&main_networkdetach, 0, 1,
"Destroy a domain's virtual network device",
"<Domain> <DevId|mac>",
},
{ "channel-list",
&main_channellist, 0, 0,
"List virtual channel devices for a domain",
"<Domain(s)>",
},
{ "block-attach",
&main_blockattach, 1, 1,
"Create a new virtual block device",
"<Domain> <disk-spec-component(s)>...",
},
{ "block-list",
&main_blocklist, 0, 0,
"List virtual block devices for a domain",
"<Domain(s)>",
},
{ "block-detach",
&main_blockdetach, 0, 1,
"Destroy a domain's virtual block device",
"[option] <Domain> <DevId>",
"-f, --force do not wait for the domain to release the device"
},
{ "vtpm-attach",
&main_vtpmattach, 1, 1,
"Create a new virtual TPM device",
"<Domain> [uuid=<uuid>] [backend=<BackDomain>]",
},
{ "vtpm-list",
&main_vtpmlist, 0, 0,
"List virtual TPM devices for a domain",
"<Domain(s)>",
},
{ "vtpm-detach",
&main_vtpmdetach, 0, 1,
"Destroy a domain's virtual TPM device",
"<Domain> <DevId|uuid>",
},
{ "vkb-attach",
&main_vkbattach, 1, 1,
"Create a new virtual keyboard device",
"<Domain> <vkb-spec-component(s)>...",
},
{ "vkb-list",
&main_vkblist, 0, 0,
"List virtual keyboard devices for a domain",
"<Domain(s)>",
},
{ "vkb-detach",
&main_vkbdetach, 0, 1,
"Destroy a domain's virtual keyboard device",
"<Domain> <DevId>",
},
{ "vdispl-attach",
&main_vdisplattach, 1, 1,
"Create a new virtual display device",
"<Domain> [backend=<BackDomain>] [be-alloc=<BackAlloc>] [connectors='<Connectors>']",
" BackAlloc - set to 1 to if backend allocates display buffers\n"
" Connectors - list of connector's description in ID:WxH format,\n"
" where: ID - unique connector ID, W - connector width,\n"
" H - connector height: connectors='id0:800x600;id1:1024x768'\n"
},
{ "vdispl-list",
&main_vdispllist, 0, 0,
"List virtual display devices for a domain",
"<Domain(s)>",
},
{ "vdispl-detach",
&main_vdispldetach, 0, 1,
"Destroy a domain's virtual display device",
"<Domain> <DevId>",
},
{ "vsnd-attach",
&main_vsndattach, 1, 1,
"Create a new virtual sound device",
"<Domain> <vsnd-spec-component(s)>...",
},
{ "vsnd-list",
&main_vsndlist, 0, 0,
"List virtual display devices for a domain",
"<Domain(s)>",
},
{ "vsnd-detach",
&main_vsnddetach, 0, 1,
"Destroy a domain's virtual sound device",
"<Domain> <DevId>",
},
{ "uptime",
&main_uptime, 0, 0,
"Print uptime for all/some domains",
"[-s] [Domain]",
},
{ "claims",
&main_claims, 0, 0,
"List outstanding claim information about all domains",
"",
"",
},
{ "cpupool-create",
&main_cpupoolcreate, 1, 1,
"Create a new CPU pool",
"[options] [<ConfigFile>] [Variable=value ...]",
"-h, --help Print this help.\n"
"-f FILE, --defconfig=FILE Use the given configuration file.\n"
"-n, --dryrun Dry run - prints the resulting configuration.\n"
" (deprecated in favour of global -N option).\n"
"\nSee the xlcpupool.cfg(5) manpage for more information.",
},
{ "cpupool-list",
&main_cpupoollist, 0, 0,
"List CPU pools on host",
"[-c|--cpus] [<CPU Pool>]",
"-c, --cpus Output list of CPUs used by a pool"
},
{ "cpupool-destroy",
&main_cpupooldestroy, 0, 1,
"Deactivates a CPU pool",
"<CPU Pool>",
},
{ "cpupool-rename",
&main_cpupoolrename, 0, 1,
"Renames a CPU pool",
"<CPU Pool> <new name>",
},
{ "cpupool-cpu-add",
&main_cpupoolcpuadd, 0, 1,
"Adds a CPU to a CPU pool",
"<CPU Pool> <CPU nr>|node:<node nr>",
},
{ "cpupool-cpu-remove",
&main_cpupoolcpuremove, 0, 1,
"Removes a CPU from a CPU pool",
"<CPU Pool> <CPU nr>|node:<node nr>",
},
{ "cpupool-migrate",
&main_cpupoolmigrate, 0, 1,
"Moves a domain into a CPU pool",
"<Domain> <CPU Pool>",
},
{ "cpupool-numa-split",
&main_cpupoolnumasplit, 0, 1,
"Splits up the machine into one CPU pool per NUMA node",
"",
},
{ "getenforce",
&main_getenforce, 0, 0,
"Returns the current enforcing mode of the Flask Xen security module",
"",
},
{ "setenforce",
&main_setenforce, 0, 1,
"Sets the current enforcing mode of the Flask Xen security module",
"<1|0|Enforcing|Permissive>",
},
{ "loadpolicy",
&main_loadpolicy, 0, 1,
"Loads a new policy into the Flask Xen security module",
"<policy file>",
},
#ifndef LIBXL_HAVE_NO_SUSPEND_RESUME
{ "remus",
&main_remus, 0, 1,
"Enable Remus HA for domain",
"[options] <Domain> [<host>]",
"-i MS Checkpoint domain memory every MS milliseconds (def. 200ms).\n"
"-u Disable memory checkpoint compression.\n"
"-s <sshcommand> Use <sshcommand> instead of ssh. String will be passed\n"
" to sh. If empty, run <host> instead of \n"
" ssh <host> xl migrate-receive -r [-e]\n"
"-e Do not wait in the background (on <host>) for the death\n"
" of the domain.\n"
"-N <netbufscript> Use netbufscript to setup network buffering instead of the\n"
" default script (" XEN_SCRIPT_DIR "/remus-netbuf-setup).\n"
"-F Enable unsafe configurations [-b|-n|-d flags]. Use this option\n"
" with caution as failover may not work as intended.\n"
"-b Replicate memory checkpoints to /dev/null (blackhole).\n"
" Works only in unsafe mode.\n"
"-n Disable network output buffering. Works only in unsafe mode.\n"
"-d Disable disk replication. Works only in unsafe mode.\n"
"-c Enable COLO HA. It is conflict with -i and -b, and memory\n"
" checkpoint must be disabled.\n"
"-p Use COLO userspace proxy."
},
#endif
{ "devd",
&main_devd, 0, 1,
"Daemon that listens for devices and launches backends",
"[options]",
"-F Run in the foreground.\n"
"-p, --pidfile [FILE] Write PID to pidfile when daemonizing.",
},
#if defined(__i386__) || defined(__x86_64__)
{ "psr-hwinfo",
&main_psr_hwinfo, 0, 1,
"Show hardware information for Platform Shared Resource",
"[options]",
"-m, --cmt Show Cache Monitoring Technology (CMT) hardware info\n"
"-a, --cat Show Cache Allocation Technology (CAT) hardware info\n"
"-b, --mba Show Memory Bandwidth Allocation (MBA) hardware info\n"
},
{ "psr-cmt-attach",
&main_psr_cmt_attach, 0, 1,
"Attach Cache Monitoring Technology service to a domain",
"<Domain>",
},
{ "psr-cmt-detach",
&main_psr_cmt_detach, 0, 1,
"Detach Cache Monitoring Technology service from a domain",
"<Domain>",
},
{ "psr-cmt-show",
&main_psr_cmt_show, 0, 1,
"Show Cache Monitoring Technology information",
"<PSR-CMT-Type> <Domain>",
"Available monitor types:\n"
"\"cache-occupancy\": Show L3 cache occupancy(KB)\n"
"\"total-mem-bandwidth\": Show total memory bandwidth(KB/s)\n"
"\"local-mem-bandwidth\": Show local memory bandwidth(KB/s)\n",
},
{ "psr-cat-set",
&main_psr_cat_cbm_set, 0, 1,
"Set cache capacity bitmasks(CBM) for a domain",
"[options] <Domain> <CBM>",
"-s <socket> Specify the socket to process, otherwise all sockets are processed\n"
"-l <level> Specify the cache level to process, otherwise L3 cache is processed\n"
"-c Set code CBM if CDP is supported\n"
"-d Set data CBM if CDP is supported\n"
},
{ "psr-cat-show",
&main_psr_cat_show, 0, 1,
"Show Cache Allocation Technology information",
"[options] <Domain>",
"-l <level> Specify the cache level to process, otherwise L3 cache is processed\n"
},
{ "psr-mba-set",
&main_psr_mba_set, 0, 1,
"Set throttling value (THRTL) for a domain",
"[options] <Domain> <THRTL>",
"-s <socket> Specify the socket to process, otherwise all sockets are processed\n"
},
{ "psr-mba-show",
&main_psr_mba_show, 0, 1,
"Show Memory Bandwidth Allocation information",
"<Domain>",
},
#endif
{ "usbctrl-attach",
&main_usbctrl_attach, 0, 1,
"Create a virtual USB controller for a domain",
"<Domain> [type=pv] [version=<version>] [ports=<number>]",
},
{ "usbctrl-detach",
&main_usbctrl_detach, 0, 1,
"Remove the virtual USB controller specified by <DevId> for a domain",
"<Domain> <DevId>",
},
{ "usbdev-attach",
&main_usbdev_attach, 0, 1,
"Attach a USB device to a domain",
"<Domain> hostbus=<busnum> hostaddr=<devnum> [controller=<DevId> [port=<port>]]",
},
{ "usbdev-detach",
&main_usbdev_detach, 0, 1,
"Detach a USB device from a domain",
"<Domain> <controller> <port>",
},
{ "usb-list",
&main_usblist, 0, 0,
"List information about all USB controllers and devices for a domain",
"<Domain>",
},
{ "qemu-monitor-command",
&main_qemu_monitor_command, 0, 1,
"Issue a qemu monitor command to the device model of a domain",
"<Domain> <Command>",
},
#ifdef LIBXL_HAVE_DT_OVERLAY
{ "dt-overlay",
&main_dt_overlay, 0, 1,
"Add/Remove a device tree overlay",
"add/remove <.dtbo>"
"-h print this help\n"
},
#endif
};
const int cmdtable_len = ARRAY_SIZE(cmd_table);
/* Look up a command in the table, allowing unambiguous truncation */
const struct cmd_spec *cmdtable_lookup(const char *s)
{
const struct cmd_spec *cmd = NULL;
size_t len;
int i, count = 0;
if (!s)
return NULL;
len = strlen(s);
for (i = 0; i < cmdtable_len; i++) {
if (!strncmp(s, cmd_table[i].cmd_name, len)) {
cmd = &cmd_table[i];
/* Take an exact match, even if it also prefixes another command */
if (len == strlen(cmd->cmd_name))
return cmd;
count++;
}
}
return (count == 1) ? cmd : NULL;
}
/*
* Local variables:
* mode: C
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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