Add error message when child exits whit error

Master proccess was not showing any error message when the child
died with an error, and it was very confusing for the user (for
example with incorrect -e command).

diff --git a/st.c b/st.c
index a2703f4..45bc89d 100644 (file)
--- a/st.c
+++ b/st.c
@@ -1176,16 +1176,15 @@ execsh(void) {
 
 void
 sigchld(int a) {
-       int stat = 0;
+       int stat, ret;
 
        if(waitpid(pid, &stat, 0) < 0)
                die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
 
-       if(WIFEXITED(stat)) {
-               exit(WEXITSTATUS(stat));
-       } else {
-               exit(EXIT_FAILURE);
-       }
+       ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
+       if (ret != EXIT_SUCCESS)
+               die("child finished with error '%d'\n", stat);
+       exit(EXIT_SUCCESS);
 }
 
 void