lttng: show man page when using command's --help

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

diff --git a/src/bin/lttng/commands/snapshot.c b/src/bin/lttng/commands/snapshot.c
index f3ef3aff41e09f6888e727b14eef703ffa07515f..1d7843954ecc60e6ad94ea62b8004338eb372325 100644 (file)
--- a/src/bin/lttng/commands/snapshot.c
+++ b/src/bin/lttng/commands/snapshot.c
@@ -15,7 +15,7 @@
  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <assert.h>
 #include <inttypes.h>
 #include <popt.h>
@@ -567,9 +567,7 @@ static int record(const char *url)
        ret = lttng_snapshot_record(current_session_name, output, 0);
        if (ret < 0) {
                if (ret == -LTTNG_ERR_MAX_SIZE_INVALID) {
-                       ERR("The minimum size of a snapshot is computed by multiplying "
-                                       "the total amount of streams with the largest subbuffer "
-                                       "in the session.");
+                       ERR("Invalid snapshot size. Cannot fit at least one packet per stream.");
                }
                goto error;
        }
@@ -717,7 +715,7 @@ int cmd_snapshot(int argc, const char **argv)
        while ((opt = poptGetNextOpt(pc)) != -1) {
                switch (opt) {
                case OPT_HELP:
-                       usage(stdout);
+                       SHOW_HELP();
                        goto end;
                case OPT_LIST_OPTIONS:
                        list_cmd_options(stdout, snapshot_opts);