/* The thing that makes children, remembers them, and contains wait loops. */
-/* This file works under BSD, System V, minix, and Posix systems. */
+/* This file works under BSD, System V, minix, and Posix systems. It does
+ not implement job control. */
/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
with Bash; see the file COPYING. If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include <stdio.h>
+#include "config.h"
+
#include "bashtypes.h"
+#include "filecntl.h"
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#include <stdio.h>
#include <signal.h>
-#include <setjmp.h>
#include <errno.h>
-#include "config.h"
+#include "bashjmp.h"
+
#include "command.h"
#include "general.h"
-#include "filecntl.h"
#include "jobs.h"
#include "externs.h"
+#include "sig.h"
#include "error.h"
+#include "bashtty.h"
#if defined (BUFFERED_INPUT)
# include "input.h"
#endif
-#if !defined (USG) && !defined (_POSIX_VERSION)
-# include <sgtty.h>
+#if defined (TERMIOS_TTY_DRIVER)
+# include <termios.h>
#else
-# if defined (_POSIX_VERSION)
-# include <termios.h>
-# else
+# if defined (TERMIO_TTY_DRIVER)
# include <termio.h>
-# if !defined (AIXRT)
-# include <sys/ttold.h>
-# endif /* !AIXRT */
-# endif /* !POSIX_VERSION */
-#endif /* USG && _POSIX_VERSION */
-
-#if !defined (SIGABRT)
-# define SIGABRT SIGIOT
-#endif /* !SIGABRT */
+# else
+# include <sgtty.h>
+# endif /* !TERMIO_TTY_DRIVER */
+#endif /* TERMIOS_TTY_DRIVER */
+
+/* For struct winsize on SCO */
+/* sys/ptem.h has winsize but needs mblk_t from sys/stream.h */
+#if defined (HAVE_SYS_PTEM_H) && defined (TIOCGWINSZ) && defined (SIGWINCH)
+# if defined (HAVE_SYS_STREAM_H)
+# include <sys/stream.h>
+# endif
+# include <sys/ptem.h>
+#endif
-#if defined (USG) || defined (_POSIX_VERSION)
+#if defined (_POSIX_VERSION) || !defined (HAVE_KILLPG)
# define killpg(pg, sig) kill(-(pg),(sig))
#endif /* USG || _POSIX_VERSION */
-#if defined (USG)
+#if !defined (HAVE_SIGINTERRUPT)
# define siginterrupt(sig, code)
#endif /* USG */
-#if defined (_POSIX_VERSION)
+#if defined (HAVE_WAITPID)
# define WAITPID(pid, statusp, options) waitpid (pid, statusp, options)
#else
# define WAITPID(pid, statusp, options) wait (statusp)
-#endif /* !_POSIX_VERSION */
+#endif /* !HAVE_WAITPID */
#if !defined (errno)
extern int errno;
extern int interactive, interactive_shell, login_shell;
extern int subshell_environment;
extern int last_command_exit_value;
-#if defined (_POSIX_VERSION)
+#if defined (HAVE_POSIX_SIGNALS)
extern sigset_t top_level_mask;
#endif
/* Call this when you start making children. */
int already_making_children = 0;
-#if defined (_POSIX_VERSION)
+/* If this is non-zero, $LINES and $COLUMNS are reset after every process
+ exits from get_tty_state(). */
+int check_window_size;
+
+#if defined (HAVE_WAITPID)
static void reap_zombie_children ();
#endif
};
static struct proc_status *pid_list = (struct proc_status *)NULL;
-static int pid_list_size = 0;
+static int pid_list_size;
#define PROC_BAD -1
#define PROC_STILL_ALIVE -2
/* None of the newly allocated slots have process id's yet. */
for (i = old; i < pid_list_size; i++)
- pid_list[i].pid = NO_PID;
+ pid_list[i].pid = NO_PID;
}
/* Return the offset within the PID_LIST array of an empty slot. This can
{
register int i;
-#if defined (_POSIX_VERSION)
+#if defined (HAVE_WAITPID)
reap_zombie_children ();
#endif
get_tty_state ();
}
-#if !defined (READLINE) && defined (TIOCGWINSZ) && defined (SIGWINCH)
-static SigHandler *old_winch;
+#if defined (TIOCGWINSZ) && defined (SIGWINCH)
+static SigHandler *old_winch = (SigHandler *)SIG_DFL;
+
+static void
+get_new_window_size (from_sig)
+ int from_sig;
+{
+ struct winsize win;
+ int tty;
+
+ tty = open ("/dev/tty", O_RDONLY);
+ if (tty >= 0 && (ioctl (tty, TIOCGWINSZ, &win) == 0) &&
+ win.ws_row > 0 && win.ws_col > 0)
+ {
+#if defined (aixpc)
+ shell_tty_info.c_winsize = win; /* structure copying */
+#endif
+ set_lines_and_columns (win.ws_row, win.ws_col);
+#if defined (READLINE)
+ _rl_set_screen_size (win.ws_row, win.ws_col);
+#endif
+ }
+ close (tty);
+}
static sighandler
sigwinch_sighandler (sig)
int sig;
{
- struct winsize win;
-
-#if defined (USG) && !defined (_POSIX_VERSION)
+#if defined (MUST_REINSTALL_SIGHANDLERS)
set_signal_handler (SIGWINCH, sigwinch_sighandler);
-#endif /* USG && !_POSIX_VERSION */
- if ((ioctl (0, TIOCGWINSZ, &win) == 0) &&
- win.ws_row > 0 && win.ws_col > 0)
- set_lines_and_columns (win.ws_row, win.ws_col);
+#endif /* MUST_REINSTALL_SIGHANDLERS */
+ get_new_window_size (1);
+}
+#else
+static void
+get_new_window_size (from_sig)
+ int from_sig;
+{
+}
+#endif /* TIOCGWINSZ && SIGWINCH */
+
+void
+set_sigwinch_handler ()
+{
+#if defined (TIOCGWINSZ) && defined (SIGWINCH)
+ old_winch = set_signal_handler (SIGWINCH, sigwinch_sighandler);
+#endif
+}
+
+void
+unset_sigwinch_handler ()
+{
+#if defined (TIOCGWINSZ) && defined (SIGWINCH)
+ set_signal_handler (SIGWINCH, old_winch);
+#endif
}
-#endif /* !READLINE && TIOCGWINSZ && SIGWINCH */
/* Setup this shell to handle C-C, etc. */
void
initialize_job_signals ()
{
set_signal_handler (SIGINT, sigint_sighandler);
-#if !defined (READLINE) && defined (TIOCGWINSZ) && defined (SIGWINCH)
- set_signal_handler (SIGWINCH, sigwinch_sighandler);
-#endif /* !READLINE && TIOCGWINSZ && SIGWINCH */
+ set_sigwinch_handler ();
/* If this is a login shell we don't wish to be disturbed by
stop signals. */
if (login_shell)
- {
-#if defined (SIGTSTP)
- set_signal_handler (SIGTSTP, SIG_IGN);
- set_signal_handler (SIGTTOU, SIG_IGN);
- set_signal_handler (SIGTTIN, SIG_IGN);
-#endif
- }
+ ignore_tty_job_signals ();
}
-#if defined (_POSIX_VERSION)
+#if defined (HAVE_WAITPID)
/* Collect the status of all zombie children so that their system
resources can be deallocated. */
static void
while ((pid = waitpid (-1, (int *)&status, WNOHANG)) > 0)
set_pid_status (pid, status);
-#endif /* WNOHANG */
+#endif
}
-#endif /* _POSIX_VERSION */
+#endif /* WAITPID && WNOHANG */
/* Fork, handling errors. Returns the pid of the newly made child, or 0.
COMMAND is just for remembering the name of the command; we don't do
int async_p;
{
pid_t pid;
-#if defined (_POSIX_VERSION)
+#if defined (HAVE_WAITPID)
int retry = 1;
-#endif /* _POSIX_VERSION */
+#endif /* HAVE_WAITPID */
/* Discard saved memory. */
- if (command)
+ if (command)
free (command);
start_pipeline ();
#endif /* BUFFERED_INPUT */
/* Create the child, handle severe errors. */
-#if defined (_POSIX_VERSION)
+#if defined (HAVE_WAITPID)
retry_fork:
-#endif /* _POSIX_VERSION */
+#endif /* HAVE_WAITPID */
if ((pid = fork ()) < 0)
{
-#if defined (_POSIX_VERSION)
+#if defined (HAVE_WAITPID)
/* Posix systems with a non-blocking waitpid () system call available
get another chance after zombies are reaped. */
if (errno == EAGAIN && retry)
retry = 0;
goto retry_fork;
}
-#endif /* _POSIX_VERSION */
+#endif /* HAVE_WAITPID */
- internal_error ("fork: %s", strerror (errno));
+ sys_error ("fork");
throw_to_top_level ();
}
-
+
if (pid == 0)
{
#if defined (BUFFERED_INPUT)
}
#endif /* BUFFERED_INPUT */
-#if defined (_POSIX_VERSION)
+#if defined (HAVE_POSIX_SIGNALS)
/* Restore top-level signal mask. */
sigprocmask (SIG_SETMASK, &top_level_mask, (sigset_t *)NULL);
#endif
/* Ignore INT and QUIT in asynchronous children. */
if (async_p)
- {
-#if 0
- /* This now done by setup_async_signals (). */
- set_signal_handler (SIGINT, SIG_IGN);
- set_signal_handler (SIGQUIT, SIG_IGN);
-#endif
- last_asynchronous_pid = getpid ();
- }
+ last_asynchronous_pid = getpid ();
-#if defined (SIGTSTP)
- set_signal_handler (SIGTSTP, SIG_DFL);
- set_signal_handler (SIGTTIN, SIG_DFL);
- set_signal_handler (SIGTTOU, SIG_DFL);
-#endif
+ default_tty_job_signals ();
}
else
{
return (pid);
}
+void
+ignore_tty_job_signals ()
+{
+#if defined (SIGTSTP)
+ set_signal_handler (SIGTSTP, SIG_IGN);
+ set_signal_handler (SIGTTIN, SIG_IGN);
+ set_signal_handler (SIGTTOU, SIG_IGN);
+#endif
+}
+
+void
+default_tty_job_signals ()
+{
+#if defined (SIGTSTP)
+ set_signal_handler (SIGTSTP, SIG_DFL);
+ set_signal_handler (SIGTTIN, SIG_DFL);
+ set_signal_handler (SIGTTOU, SIG_DFL);
+#endif
+}
+
/* Wait for a single pid (PID) and return its exit status. */
wait_for_single_pid (pid)
pid_t pid;
pstatus = find_status_by_pid (pid);
if (pstatus == PROC_BAD)
- return (127);
+ {
+ internal_error ("wait: pid %d is not a child of this shell", pid);
+ return (127);
+ }
if (pstatus != PROC_STILL_ALIVE)
return (pstatus);
if (errno != EINTR && errno != ECHILD)
{
siginterrupt (SIGINT, 0);
- file_error ("wait");
+ sys_error ("wait");
}
break;
}
WAIT status;
/* If we aren't using job control, we let the kernel take care of the
- bookkeeping for us. wait () will return -1 and set errno to ECHILD
+ bookkeeping for us. wait () will return -1 and set errno to ECHILD
when there are no more unwaited-for child processes on both
4.2 BSD-based and System V-based systems. */
if (errno != EINTR && errno != ECHILD)
{
siginterrupt (SIGINT, 0);
- file_error("wait");
+ sys_error("wait");
}
siginterrupt (SIGINT, 0);
maybe_call_trap_handler (sig);
#endif
-#if !defined (VOID_SIGHANDLER)
- return (0);
-#endif /* !VOID_SIGHANDLER */
+ SIGRETURN (0);
}
/* Wait for pid (one of our children) to terminate. This is called only
break;
}
else if (got_pid < 0 && errno != EINTR)
- programming_error ("got errno %d while waiting for %d", errno, pid);
+ programming_error ("wait_for(%d): %s", pid, strerror(errno));
else if (got_pid > 0)
set_pid_status (got_pid, status);
}
set_pid_status (got_pid, status);
-#if defined (_POSIX_VERSION)
+#if defined (HAVE_WAITPID)
if (got_pid >= 0)
reap_zombie_children ();
-#endif /* _POSIX_VERSION */
+#endif /* HAVE_WAITPID */
- if (!interactive_shell)
+ if (interactive_shell == 0)
{
set_signal_handler (SIGINT, old_sigint_handler);
/* If the job exited because of SIGINT, make sure the shell acts as if
(*old_sigint_handler) (SIGINT);
}
}
-
+
/* Default return value. */
/* ``a full 8 bits of status is returned'' */
if (WIFSIGNALED (status))
return_val = 128 + WTERMSIG (status);
else
return_val = WEXITSTATUS (status);
-
+
if (!WIFSTOPPED (status) && WIFSIGNALED (status) &&
(WTERMSIG (status) != SIGINT))
{
fprintf (stderr, "\n");
}
- if (interactive_shell && !subshell_environment)
+ if (interactive_shell && subshell_environment == 0)
{
if (WIFSIGNALED (status) || WIFSTOPPED (status))
set_tty_state ();
return (result);
}
-#if defined (_POSIX_VERSION)
+#if defined (TERMIOS_TTY_DRIVER)
static struct termios shell_tty_info;
-#else
-# if defined (USG)
+#else /* !TERMIOS_TTY_DRIVER */
+# if defined (TERMIO_TTY_DRIVER)
static struct termio shell_tty_info;
# else
static struct sgttyb shell_tty_info;
-# endif /* USG */
-#endif /* _POSIX_VERSION */
+# endif /* !TERMIO_TTY_DRIVER */
+#endif /* !TERMIOS_TTY_DRIVER */
-static int got_tty_state = 0;
+static int got_tty_state;
/* Fill the contents of shell_tty_info with the current tty info. */
get_tty_state ()
{
- int tty = open ("/dev/tty", O_RDONLY);
+ int tty;
+
+ tty = open ("/dev/tty", O_RDONLY);
if (tty != -1)
{
-#if defined (_POSIX_VERSION)
+#if defined (TERMIOS_TTY_DRIVER)
tcgetattr (tty, &shell_tty_info);
#else
-# if defined (USG)
+# if defined (TERMIO_TTY_DRIVER)
ioctl (tty, TCGETA, &shell_tty_info);
# else
ioctl (tty, TIOCGETP, &shell_tty_info);
#endif
close (tty);
got_tty_state = 1;
+ if (check_window_size)
+ get_new_window_size (0);
}
}
/* Make the current tty use the state in shell_tty_info. */
set_tty_state ()
{
- int tty = open ("/dev/tty", O_RDONLY);
+ int tty;
+
+ tty = open ("/dev/tty", O_RDONLY);
if (tty != -1)
{
- if (!got_tty_state)
+ if (got_tty_state == 0)
{
close (tty);
return;
}
-#if defined (_POSIX_VERSION)
+#if defined (TERMIOS_TTY_DRIVER)
tcsetattr (tty, TCSADRAIN, &shell_tty_info);
#else
-# if defined (USG)
+# if defined (TERMIO_TTY_DRIVER)
ioctl (tty, TCSETAW, &shell_tty_info); /* Wait for output, no flush */
# else
ioctl (tty, TIOCSETN, &shell_tty_info);
{
fprintf (stderr, "%d\n", (int) pid);
}
+
+void
+unfreeze_jobs_list ()
+{
+}
projects / platform / upstream / bash.git / blobdiff