Add a '--list-options' option to each command.

[lttng-tools.git] / src / bin / lttng / commands / enable_channels.c

diff --git a/src/bin/lttng/commands/enable_channels.c b/src/bin/lttng/commands/enable_channels.c
index 5443d78a3c8826138cf9e3813de8ea88936befa8..e27fe88cecff1a826e62e849539bdaa4187a8a93 100644 (file)
--- a/src/bin/lttng/commands/enable_channels.c
+++ b/src/bin/lttng/commands/enable_channels.c
@@ -48,6 +48,7 @@ enum {
        OPT_SWITCH_TIMER,
        OPT_READ_TIMER,
        OPT_USERSPACE,
+       OPT_LIST_OPTIONS,
 };
 
 static struct lttng_handle *handle;
@@ -70,6 +71,7 @@ static struct poptOption long_options[] = {
        {"num-subbuf",     0,   POPT_ARG_INT, 0, OPT_NUM_SUBBUF, 0, 0},
        {"switch-timer",   0,   POPT_ARG_INT, 0, OPT_SWITCH_TIMER, 0, 0},
        {"read-timer",     0,   POPT_ARG_INT, 0, OPT_READ_TIMER, 0, 0},
+       {"list-options",   0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
        {0, 0, 0, 0, 0, 0, 0}
 };
 
@@ -81,6 +83,7 @@ static void usage(FILE *ofp)
        fprintf(ofp, "usage: lttng enable-channel NAME[,NAME2,...] [options] [channel_options]\n");
        fprintf(ofp, "\n");
        fprintf(ofp, "  -h, --help               Show this help\n");
+       fprintf(ofp, "      --list-options       Simple listing of options\n");
        fprintf(ofp, "  -s, --session            Apply on session name\n");
        fprintf(ofp, "  -k, --kernel             Apply on the kernel tracer\n");
 #if 0
@@ -258,6 +261,10 @@ int cmd_enable_channels(int argc, const char **argv)
                case OPT_USERSPACE:
                        opt_userspace = 1;
                        break;
+               case OPT_LIST_OPTIONS:
+                       list_cmd_options(stdout, long_options);
+                       ret = CMD_SUCCESS;
+                       goto end;
                default:
                        usage(stderr);
                        ret = CMD_UNDEFINED;