X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fcommands%2Fset_session.c;h=d143c7dd45ff2623899047b8b5e89ef0ed45dbcc;hb=7d81aa9fff703f8fcf35f8ac426aa37d0ffffb16;hp=fd3d9a11813a3a7fdd9bb9f8b47afb8a74b0e4ca;hpb=ce91cd0baf698b0c53f97f1101d863db87cf861a;p=lttng-tools.git

diff --git a/src/bin/lttng/commands/set_session.c b/src/bin/lttng/commands/set_session.c
index fd3d9a118..d143c7dd4 100644
--- a/src/bin/lttng/commands/set_session.c
+++ b/src/bin/lttng/commands/set_session.c
@@ -15,7 +15,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <popt.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -31,6 +31,12 @@
 
 static char *opt_session_name;
 
+#ifdef LTTNG_EMBED_HELP
+static const char help_msg[] =
+#include <lttng-set-session.1.h>
+;
+#endif
+
 enum {
 	OPT_HELP = 1,
 	OPT_LIST_OPTIONS,
@@ -45,19 +51,6 @@ static struct poptOption long_options[] = {
 	{0, 0, 0, 0, 0, 0, 0}
 };
 
-/*
- * usage
- */
-static void usage(FILE *ofp)
-{
-	fprintf(ofp, "usage: lttng set-session NAME [OPTIONS]\n");
-	fprintf(ofp, "\n");
-	fprintf(ofp, "Options:\n");
-	fprintf(ofp, "  -h, --help               Show this help\n");
-	fprintf(ofp, "      --list-options       Simple listing of options\n");
-	fprintf(ofp, "\n");
-}
-
 /*
  * Print the necessary mi for a session and name.
  */
@@ -105,11 +98,34 @@ end:
 static int set_session(void)
 {
 	int ret = CMD_SUCCESS;
+	int count, i;
+	unsigned int session_found = 0;
+	struct lttng_session *sessions;
 
 	if (opt_session_name && strlen(opt_session_name) > NAME_MAX) {
 		ERR("Session name too long. Length must be lower or equal to %d",
 			NAME_MAX);
 		ret = CMD_ERROR;
+		goto end;
+	}
+
+	count = lttng_list_sessions(&sessions);
+	if (count < 0) {
+		ret = CMD_ERROR;
+		ERR("%s", lttng_strerror(count));
+		goto end;
+	}
+
+	for (i = 0; i < count; i++) {
+		if (strncmp(sessions[i].name, opt_session_name, NAME_MAX) == 0) {
+			session_found = 1;
+			break;
+		}
+	}
+
+	if (!session_found) {
+		ERR("Session '%s' not found", opt_session_name);
+		ret = CMD_ERROR;
 		goto error;
 	}
 
@@ -132,6 +148,8 @@ static int set_session(void)
 	ret = CMD_SUCCESS;
 
 error:
+	free(sessions);
+end:
 	return ret;
 }
 
@@ -149,13 +167,12 @@ int cmd_set_session(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, long_options);
 			goto end;
 		default:
-			usage(stderr);
 			ret = CMD_UNDEFINED;
 			goto end;
 		}
@@ -164,7 +181,6 @@ int cmd_set_session(int argc, const char **argv)
 	opt_session_name = (char *) poptGetArg(pc);
 	if (opt_session_name == NULL) {
 		ERR("Missing session name");
-		usage(stderr);
 		ret = CMD_ERROR;
 		goto end;
 	}
@@ -231,7 +247,7 @@ end:
 		ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
 	}
 
-	/* Overwrite ret if an error occured during set_session() */
+	/* Overwrite ret if an error occurred during set_session() */
 	ret = command_ret ? command_ret : ret;
 
 	poptFreeContext(pc);