diff options
Diffstat (limited to 'src/process.c')
| -rw-r--r-- | src/process.c | 39 |
1 files changed, 8 insertions, 31 deletions
diff --git a/src/process.c b/src/process.c index a371dece250..c654369627d 100644 --- a/src/process.c +++ b/src/process.c @@ -1609,14 +1609,10 @@ create_process (Lisp_Object process, char **new_argv, Lisp_Object current_dir) #if !defined (WINDOWSNT) && defined (FD_CLOEXEC) int wait_child_setup[2]; #endif +#ifdef SIGCHLD sigset_t blocked, procmask; - struct sigaction sigint_action; - struct sigaction sigquit_action; - struct sigaction sigpipe_action; -#ifdef AIX - struct sigaction sighup_action; #endif - /* Use volatile to protect variables from being clobbered by longjmp. */ + /* Use volatile to protect variables from being clobbered by vfork. */ volatile int forkin, forkout; volatile int pty_flag = 0; @@ -1708,25 +1704,13 @@ create_process (Lisp_Object process, char **new_argv, Lisp_Object current_dir) XPROCESS (process)->pty_flag = pty_flag; pset_status (XPROCESS (process), Qrun); +#ifdef SIGCHLD /* Delay interrupts until we have a chance to store the new fork's pid in its process structure */ sigemptyset (&blocked); -#ifdef SIGCHLD sigaddset (&blocked, SIGCHLD); -#endif -#ifdef HAVE_WORKING_VFORK - /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', - this sets the parent's signal handlers as well as the child's. - So delay all interrupts whose handlers the child might munge, - and record the current handlers so they can be restored later. */ - sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); - sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); - sigaddset (&blocked, SIGPIPE); sigaction (SIGPIPE, 0, &sigpipe_action); -#ifdef AIX - sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); -#endif -#endif /* HAVE_WORKING_VFORK */ pthread_sigmask (SIG_BLOCK, &blocked, &procmask); +#endif FD_SET (inchannel, &input_wait_mask); FD_SET (inchannel, &non_keyboard_wait_mask); @@ -1879,8 +1863,10 @@ create_process (Lisp_Object process, char **new_argv, Lisp_Object current_dir) in the child. */ signal (SIGPIPE, SIG_DFL); +#ifdef SIGCHLD /* Stop blocking signals in the child. */ pthread_sigmask (SIG_SETMASK, &procmask, 0); +#endif if (pty_flag) child_setup_tty (xforkout); @@ -1959,19 +1945,10 @@ create_process (Lisp_Object process, char **new_argv, Lisp_Object current_dir) #endif } - /* Restore the signal state whether vfork succeeded or not. - (We will signal an error, below, if it failed.) */ -#ifdef HAVE_WORKING_VFORK - /* Restore the parent's signal handlers. */ - sigaction (SIGINT, &sigint_action, 0); - sigaction (SIGQUIT, &sigquit_action, 0); - sigaction (SIGPIPE, &sigpipe_action, 0); -#ifdef AIX - sigaction (SIGHUP, &sighup_action, 0); -#endif -#endif /* HAVE_WORKING_VFORK */ +#ifdef SIGCHLD /* Stop blocking signals in the parent. */ pthread_sigmask (SIG_SETMASK, &procmask, 0); +#endif /* Now generate the error if vfork failed. */ if (pid < 0) |