shithub: riscv

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ratrace: fix fork/exec race with "nohang" procctl (like a debugger)

--- a/sys/src/cmd/ratrace.c

+++ b/sys/src/cmd/ratrace.c

@@ -192,6 +192,7 @@

 		if (pid < 0)

 			sysfatal("fork failed: %r");

 		if(pid == 0) {

+			write(open(smprint("/proc/%d/ctl", getpid()), OWRITE|OCEXEC), "hang", 4);

 			exec(cmd, args);

 			if(cmd[0] != '/')

 				exec(smprint("/bin/%s", cmd), args);