ucm: recognize first '-' character as ignore error for exec/shell

It may be useful to ignore the returned errors (like modprobe etc).

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/src/ucm/main.c b/src/ucm/main.c
index 81bed83..361952f 100644 (file)
--- a/src/ucm/main.c
+++ b/src/ucm/main.c
@@ -674,6 +674,7 @@ static int execute_sequence(snd_use_case_mgr_t *uc_mgr,
        char *cdev = NULL;
        snd_ctl_t *ctl = NULL;
        struct ctl_list *ctl_list;
+       bool ignore_error;
        int err = 0;
 
        list_for_each(pos, seq) {
@@ -767,19 +768,25 @@ static int execute_sequence(snd_use_case_mgr_t *uc_mgr,
                        usleep(s->data.sleep);
                        break;
                case SEQUENCE_ELEMENT_TYPE_EXEC:
-                       err = uc_mgr_exec(s->data.exec);
-                       if (err != 0) {
+                       if (s->data.exec == NULL)
+                               break;
+                       ignore_error = s->data.exec[0] == '-';
+                       err = uc_mgr_exec(s->data.exec + (ignore_error ? 1 : 0));
+                       if (ignore_error == false && err != 0) {
                                uc_error("exec '%s' failed (exit code %d)", s->data.exec, err);
                                goto __fail;
                        }
                        break;
                case SEQUENCE_ELEMENT_TYPE_SHELL:
+                       if (s->data.exec == NULL)
+                               break;
+                       ignore_error = s->data.exec[0] == '-';
 shell_retry:
-                       err = system(s->data.exec);
+                       err = system(s->data.exec + (ignore_error ? 1 : 0));
                        if (WIFSIGNALED(err)) {
                                err = -EINTR;
                        } if (WIFEXITED(err)) {
-                               if (WEXITSTATUS(err) != 0) {
+                               if (ignore_error == false && WEXITSTATUS(err) != 0) {
                                        uc_error("command '%s' failed (exit code %d)", s->data.exec, WEXITSTATUS(err));
                                        err = -EINVAL;
                                        goto __fail;