add way to enable options in recording

Although most of the options are for print output, that does not even
affect the report function.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 57 insertions, 4 deletions

diff --git a/trace-cmd.c b/trace-cmd.c
index ad45081..759b6fa 100644
--- a/trace-cmd.c
+++ b/trace-cmd.c
@@ -374,6 +374,42 @@ static void set_plugin(const char *name)
         fclose(fp);
 }
 
+static void show_options(void)
+{
+        char buf[BUFSIZ];
+        char *path;
+        FILE *fp;
+        size_t n;
+
+        path = get_tracing_file("trace_options");
+        fp = fopen(path, "r");
+        if (!fp)
+                die("reading %s", path);
+        put_tracing_file(path);
+
+        do {
+                n = fread(buf, 1, BUFSIZ, fp);
+                if (n > 0)
+                        fwrite(buf, 1, n, stdout);
+        } while (n > 0);
+        fclose(fp);
+}
+
+static void set_option(const char *option)
+{
+        FILE *fp;
+        char *path;
+
+        path = get_tracing_file("trace_options");
+        fp = fopen(path, "w");
+        if (!fp)
+                die("writing to '%s'", path);
+        put_tracing_file(path);
+
+        fwrite(option, 1, strlen(option), fp);
+        fclose(fp);
+}
+
 static void enable_event(const char *name)
 {
         FILE *fp;
@@ -1033,11 +1069,12 @@ void usage(char **argv)
 
         printf("\n"
                "%s version %s\n\n"
-               "usage: %s record [-e event][-p plugin] [-d] [-o file] command ...\n"
+               "usage: %s record [-e event][-p plugin] [-d] [-o file] [-O option ] command ...\n"
                "          -e run command with event enabled\n"
                "          -p run command with plugin enabled\n"
                "          -d disable function tracer when running\n"
                "          -o data output file [default trace.dat]\n"
+               "          -O option to enable (or disable)\n"
                "\n"
                " %s report [-i file] [--cpu cpu] [-e][-f]\n"
                "          -i input file [default trace.dat]\n"
@@ -1049,6 +1086,7 @@ void usage(char **argv)
                " %s list [-e][-p]\n"
                "          -e list available events\n"
                "          -p list available plugins\n"
+               "          -o list available options\n"
                "\n", p, VERSION, p, p, p);
         exit(-1);
 }
@@ -1057,10 +1095,12 @@ int main (int argc, char **argv)
 {
         const char *plugin = NULL;
         const char *output = NULL;
+        const char *option;
         struct event_list *event;
         int disable = 0;
         int plug = 0;
         int events = 0;
+        int options = 0;
 
         int c;
 
@@ -1074,7 +1114,7 @@ int main (int argc, char **argv)
                 exit(0);
         } else if (strcmp(argv[1], "record") == 0) {
 
-                while ((c = getopt(argc-1, argv+1, "+he:p:do:")) >= 0) {
+                while ((c = getopt(argc-1, argv+1, "+he:p:do:O:")) >= 0) {
                         switch (c) {
                         case 'h':
                                 usage(argv);
@@ -1099,12 +1139,17 @@ int main (int argc, char **argv)
                                 if (output)
                                         die("only one output file allowed");
                                 output = optarg;
+                                break;
+                        case 'O':
+                                option = optarg;
+                                set_option(option);
+                                break;
                         }
                 }
 
         } else if (strcmp(argv[1], "list") == 0) {
 
-                while ((c = getopt(argc-1, argv+1, "+hep")) >= 0) {
+                while ((c = getopt(argc-1, argv+1, "+hepo")) >= 0) {
                         switch (c) {
                         case 'h':
                                 usage(argv);
@@ -1115,6 +1160,9 @@ int main (int argc, char **argv)
                         case 'p':
                                 plug = 1;
                                 break;
+                        case 'o':
+                                options = 1;
+                                break;
                         default:
                                 usage(argv);
                         }
@@ -1126,11 +1174,16 @@ int main (int argc, char **argv)
                 if (plug)
                         show_plugins();
 
-                if (!events && !plug) {
+                if (options)
+                        show_options();
+
+                if (!events && !plug && !options) {
                         printf("events:\n");
                         show_events();
                         printf("\nplugins:\n");
                         show_plugins();
+                        printf("\noptions:\n");
+                        show_options();
                 }
 
                 exit(0);