X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=trunk%2Fltt-control%2Flttctl%2Flttctl.c;h=c0bf93dbcea6c60e553b2a2c0557f82c75c44f0e;hb=c68a769243b3c071553bf550f72258423392f623;hp=c1a49cd4f8dff16179e6ad03436cc98376885ed8;hpb=b1f29379e7920a8368b85fffc676c054795d6498;p=ltt-control.git

diff --git a/trunk/ltt-control/lttctl/lttctl.c b/trunk/ltt-control/lttctl/lttctl.c
index c1a49cd..c0bf93d 100644
--- a/trunk/ltt-control/lttctl/lttctl.c
+++ b/trunk/ltt-control/lttctl/lttctl.c
@@ -121,7 +121,8 @@ static void show_arguments(void)
 	printf("        channel.<channelname>.enable=\n");
 	printf("        channel.<channelname>.overwrite=\n");
 	printf("        channel.<channelname>.bufnum=\n");
-	printf("        channel.<channelname>.bufsize=\n");
+	printf("        channel.<channelname>.bufsize= (in bytes, rounded to "
+	       "next power of 2)\n");
 	printf("        <channelname> can be set to all for all channels\n");
 	printf("\n");
 	printf(" Integration options:\n");
@@ -142,26 +143,6 @@ static void show_arguments(void)
 	printf("\n");
 }
 
-static int getdebugfsmntdir(char *mntdir)
-{
-	char mnt_dir[PATH_MAX];
-	char mnt_type[PATH_MAX];
-
-	FILE *fp = fopen("/proc/mounts", "r");
-	if (!fp)
-		return -EINVAL;
-
-	while (1) {
-		if (fscanf(fp, "%*s %s %s %*s %*s %*s", mnt_dir, mnt_type) <= 0)
-			return -ENOENT;
-
-		if (!strcmp(mnt_type, "debugfs")) {
-			strcpy(mntdir, mnt_dir);
-			return 0;
-		}
-	}
-}
-
 /*
  * Separate option name to 3 fields
  * Ex:
@@ -559,19 +540,15 @@ static int parse_arguments(int argc, char **argv)
 			if (getdebugfsmntdir(channel_root_default) == 0) {
 				strcat(channel_root_default, "/ltt");
 				opt_channel_root = channel_root_default;
+			} else {
+				fprintf(stderr,
+					"Channel_root is necessary for -w"
+					" option, but neither --channel_root"
+					" option\n"
+					"specified, nor debugfs's mount dir"
+					" found, mount debugfs also failed\n");
+				return -EINVAL;
 			}
-		/* Todo:
-		 * if (!opt_channel_root)
-		 *	if (auto_mount_debugfs_dir(channel_root_default) == 0)
-		 *		opt_channel_root = debugfs_dir_mnt_point;
-		 */
-		if (!opt_channel_root) {
-			fprintf(stderr,
-				"Channel_root is necessary for -w option,"
-				" but neither --channel_root option\n"
-				"specified, nor debugfs's mount dir found.\n");
-			return -EINVAL;
-		}
 
 		if (opt_dump_threads == 0)
 			opt_dump_threads = 1;