Imported from ../bash-2.0.tar.gz.
This commit is contained in:
Jari Aalto
parent
726f63884d
commit
ccc6cda312
502 changed files with 91988 additions and 69123 deletions
269
nojobs.c
269
nojobs.c
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@ -1,6 +1,7 @@
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/* The thing that makes children, remembers them, and contains wait loops. */
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/* This file works under BSD, System V, minix, and Posix systems. */
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/* This file works under BSD, System V, minix, and Posix systems. It does
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not implement job control. */
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/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
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@ -20,54 +21,65 @@
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with Bash; see the file COPYING. If not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include "config.h"
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#include "bashtypes.h"
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#include "filecntl.h"
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#include <stdio.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <errno.h>
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#include "config.h"
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#include "bashjmp.h"
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#include "command.h"
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#include "general.h"
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#include "filecntl.h"
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#include "jobs.h"
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#include "externs.h"
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#include "sig.h"
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#include "error.h"
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#include "bashtty.h"
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#if defined (BUFFERED_INPUT)
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# include "input.h"
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#endif
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#if !defined (USG) && !defined (_POSIX_VERSION)
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# include <sgtty.h>
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#if defined (TERMIOS_TTY_DRIVER)
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# include <termios.h>
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#else
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# if defined (_POSIX_VERSION)
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# include <termios.h>
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# else
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# if defined (TERMIO_TTY_DRIVER)
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# include <termio.h>
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# if !defined (AIXRT)
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# include <sys/ttold.h>
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# endif /* !AIXRT */
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# endif /* !POSIX_VERSION */
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#endif /* USG && _POSIX_VERSION */
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# else
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# include <sgtty.h>
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# endif /* !TERMIO_TTY_DRIVER */
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#endif /* TERMIOS_TTY_DRIVER */
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#if !defined (SIGABRT)
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# define SIGABRT SIGIOT
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#endif /* !SIGABRT */
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/* For struct winsize on SCO */
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/* sys/ptem.h has winsize but needs mblk_t from sys/stream.h */
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#if defined (HAVE_SYS_PTEM_H) && defined (TIOCGWINSZ) && defined (SIGWINCH)
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# if defined (HAVE_SYS_STREAM_H)
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# include <sys/stream.h>
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# endif
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# include <sys/ptem.h>
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#endif
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#if defined (USG) || defined (_POSIX_VERSION)
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#if defined (_POSIX_VERSION) || !defined (HAVE_KILLPG)
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# define killpg(pg, sig) kill(-(pg),(sig))
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#endif /* USG || _POSIX_VERSION */
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#if defined (USG)
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#if !defined (HAVE_SIGINTERRUPT)
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# define siginterrupt(sig, code)
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#endif /* USG */
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#if defined (_POSIX_VERSION)
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#if defined (HAVE_WAITPID)
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# define WAITPID(pid, statusp, options) waitpid (pid, statusp, options)
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#else
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# define WAITPID(pid, statusp, options) wait (statusp)
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#endif /* !_POSIX_VERSION */
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#endif /* !HAVE_WAITPID */
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#if !defined (errno)
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extern int errno;
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@ -76,7 +88,7 @@ extern int errno;
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extern int interactive, interactive_shell, login_shell;
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extern int subshell_environment;
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extern int last_command_exit_value;
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#if defined (_POSIX_VERSION)
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#if defined (HAVE_POSIX_SIGNALS)
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extern sigset_t top_level_mask;
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#endif
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@ -86,7 +98,11 @@ pid_t last_asynchronous_pid = NO_PID;
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/* Call this when you start making children. */
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int already_making_children = 0;
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#if defined (_POSIX_VERSION)
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/* If this is non-zero, $LINES and $COLUMNS are reset after every process
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exits from get_tty_state(). */
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int check_window_size;
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#if defined (HAVE_WAITPID)
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static void reap_zombie_children ();
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#endif
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@ -96,7 +112,7 @@ struct proc_status {
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};
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static struct proc_status *pid_list = (struct proc_status *)NULL;
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static int pid_list_size = 0;
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static int pid_list_size;
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#define PROC_BAD -1
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#define PROC_STILL_ALIVE -2
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@ -114,7 +130,7 @@ alloc_pid_list ()
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/* None of the newly allocated slots have process id's yet. */
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for (i = old; i < pid_list_size; i++)
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pid_list[i].pid = NO_PID;
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pid_list[i].pid = NO_PID;
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}
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/* Return the offset within the PID_LIST array of an empty slot. This can
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@ -197,7 +213,7 @@ cleanup_dead_jobs ()
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{
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register int i;
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#if defined (_POSIX_VERSION)
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#if defined (HAVE_WAITPID)
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reap_zombie_children ();
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#endif
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@ -212,46 +228,78 @@ initialize_jobs ()
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get_tty_state ();
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}
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#if !defined (READLINE) && defined (TIOCGWINSZ) && defined (SIGWINCH)
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static SigHandler *old_winch;
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#if defined (TIOCGWINSZ) && defined (SIGWINCH)
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static SigHandler *old_winch = (SigHandler *)SIG_DFL;
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static void
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get_new_window_size (from_sig)
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int from_sig;
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{
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struct winsize win;
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int tty;
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tty = open ("/dev/tty", O_RDONLY);
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if (tty >= 0 && (ioctl (tty, TIOCGWINSZ, &win) == 0) &&
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win.ws_row > 0 && win.ws_col > 0)
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{
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#if defined (aixpc)
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shell_tty_info.c_winsize = win; /* structure copying */
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#endif
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set_lines_and_columns (win.ws_row, win.ws_col);
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#if defined (READLINE)
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_rl_set_screen_size (win.ws_row, win.ws_col);
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#endif
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}
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close (tty);
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}
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static sighandler
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sigwinch_sighandler (sig)
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int sig;
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{
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struct winsize win;
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#if defined (USG) && !defined (_POSIX_VERSION)
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#if defined (MUST_REINSTALL_SIGHANDLERS)
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set_signal_handler (SIGWINCH, sigwinch_sighandler);
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#endif /* USG && !_POSIX_VERSION */
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if ((ioctl (0, TIOCGWINSZ, &win) == 0) &&
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win.ws_row > 0 && win.ws_col > 0)
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set_lines_and_columns (win.ws_row, win.ws_col);
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#endif /* MUST_REINSTALL_SIGHANDLERS */
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get_new_window_size (1);
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}
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#else
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static void
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get_new_window_size (from_sig)
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int from_sig;
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{
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}
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#endif /* TIOCGWINSZ && SIGWINCH */
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void
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set_sigwinch_handler ()
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{
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#if defined (TIOCGWINSZ) && defined (SIGWINCH)
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old_winch = set_signal_handler (SIGWINCH, sigwinch_sighandler);
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#endif
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}
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void
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unset_sigwinch_handler ()
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{
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#if defined (TIOCGWINSZ) && defined (SIGWINCH)
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set_signal_handler (SIGWINCH, old_winch);
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#endif
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}
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#endif /* !READLINE && TIOCGWINSZ && SIGWINCH */
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/* Setup this shell to handle C-C, etc. */
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void
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initialize_job_signals ()
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{
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set_signal_handler (SIGINT, sigint_sighandler);
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#if !defined (READLINE) && defined (TIOCGWINSZ) && defined (SIGWINCH)
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set_signal_handler (SIGWINCH, sigwinch_sighandler);
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#endif /* !READLINE && TIOCGWINSZ && SIGWINCH */
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set_sigwinch_handler ();
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/* If this is a login shell we don't wish to be disturbed by
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stop signals. */
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if (login_shell)
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{
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#if defined (SIGTSTP)
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set_signal_handler (SIGTSTP, SIG_IGN);
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set_signal_handler (SIGTTOU, SIG_IGN);
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set_signal_handler (SIGTTIN, SIG_IGN);
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#endif
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}
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ignore_tty_job_signals ();
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}
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#if defined (_POSIX_VERSION)
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#if defined (HAVE_WAITPID)
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/* Collect the status of all zombie children so that their system
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resources can be deallocated. */
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static void
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@ -263,9 +311,9 @@ reap_zombie_children ()
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while ((pid = waitpid (-1, (int *)&status, WNOHANG)) > 0)
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set_pid_status (pid, status);
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#endif /* WNOHANG */
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#endif
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}
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#endif /* _POSIX_VERSION */
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#endif /* WAITPID && WNOHANG */
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/* Fork, handling errors. Returns the pid of the newly made child, or 0.
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COMMAND is just for remembering the name of the command; we don't do
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@ -277,12 +325,12 @@ make_child (command, async_p)
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int async_p;
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{
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pid_t pid;
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#if defined (_POSIX_VERSION)
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#if defined (HAVE_WAITPID)
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int retry = 1;
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#endif /* _POSIX_VERSION */
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#endif /* HAVE_WAITPID */
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/* Discard saved memory. */
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if (command)
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if (command)
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free (command);
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start_pipeline ();
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@ -298,13 +346,13 @@ make_child (command, async_p)
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#endif /* BUFFERED_INPUT */
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/* Create the child, handle severe errors. */
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#if defined (_POSIX_VERSION)
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#if defined (HAVE_WAITPID)
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retry_fork:
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#endif /* _POSIX_VERSION */
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#endif /* HAVE_WAITPID */
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if ((pid = fork ()) < 0)
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{
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#if defined (_POSIX_VERSION)
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#if defined (HAVE_WAITPID)
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/* Posix systems with a non-blocking waitpid () system call available
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get another chance after zombies are reaped. */
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if (errno == EAGAIN && retry)
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@ -313,13 +361,13 @@ make_child (command, async_p)
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retry = 0;
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goto retry_fork;
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}
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#endif /* _POSIX_VERSION */
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#endif /* HAVE_WAITPID */
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internal_error ("fork: %s", strerror (errno));
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sys_error ("fork");
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throw_to_top_level ();
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}
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if (pid == 0)
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{
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#if defined (BUFFERED_INPUT)
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@ -330,27 +378,16 @@ make_child (command, async_p)
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}
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#endif /* BUFFERED_INPUT */
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#if defined (_POSIX_VERSION)
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#if defined (HAVE_POSIX_SIGNALS)
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/* Restore top-level signal mask. */
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sigprocmask (SIG_SETMASK, &top_level_mask, (sigset_t *)NULL);
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#endif
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/* Ignore INT and QUIT in asynchronous children. */
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if (async_p)
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{
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#if 0
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/* This now done by setup_async_signals (). */
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set_signal_handler (SIGINT, SIG_IGN);
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set_signal_handler (SIGQUIT, SIG_IGN);
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#endif
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last_asynchronous_pid = getpid ();
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}
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last_asynchronous_pid = getpid ();
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#if defined (SIGTSTP)
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set_signal_handler (SIGTSTP, SIG_DFL);
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set_signal_handler (SIGTTIN, SIG_DFL);
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set_signal_handler (SIGTTOU, SIG_DFL);
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#endif
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default_tty_job_signals ();
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}
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else
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{
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@ -366,6 +403,26 @@ make_child (command, async_p)
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return (pid);
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}
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void
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ignore_tty_job_signals ()
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{
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#if defined (SIGTSTP)
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set_signal_handler (SIGTSTP, SIG_IGN);
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set_signal_handler (SIGTTIN, SIG_IGN);
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set_signal_handler (SIGTTOU, SIG_IGN);
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#endif
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}
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void
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default_tty_job_signals ()
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{
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#if defined (SIGTSTP)
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set_signal_handler (SIGTSTP, SIG_DFL);
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set_signal_handler (SIGTTIN, SIG_DFL);
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set_signal_handler (SIGTTOU, SIG_DFL);
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#endif
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}
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/* Wait for a single pid (PID) and return its exit status. */
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wait_for_single_pid (pid)
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pid_t pid;
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@ -377,7 +434,10 @@ wait_for_single_pid (pid)
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pstatus = find_status_by_pid (pid);
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if (pstatus == PROC_BAD)
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return (127);
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{
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internal_error ("wait: pid %d is not a child of this shell", pid);
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return (127);
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}
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if (pstatus != PROC_STILL_ALIVE)
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return (pstatus);
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@ -390,7 +450,7 @@ wait_for_single_pid (pid)
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if (errno != EINTR && errno != ECHILD)
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{
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siginterrupt (SIGINT, 0);
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file_error ("wait");
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sys_error ("wait");
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}
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break;
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}
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@ -416,7 +476,7 @@ wait_for_background_pids ()
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WAIT status;
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/* If we aren't using job control, we let the kernel take care of the
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bookkeeping for us. wait () will return -1 and set errno to ECHILD
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bookkeeping for us. wait () will return -1 and set errno to ECHILD
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when there are no more unwaited-for child processes on both
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4.2 BSD-based and System V-based systems. */
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@ -429,7 +489,7 @@ wait_for_background_pids ()
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if (errno != EINTR && errno != ECHILD)
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{
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siginterrupt (SIGINT, 0);
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file_error("wait");
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sys_error("wait");
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}
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siginterrupt (SIGINT, 0);
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@ -448,9 +508,7 @@ wait_sigint_handler (sig)
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maybe_call_trap_handler (sig);
|
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#endif
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|
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#if !defined (VOID_SIGHANDLER)
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return (0);
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#endif /* !VOID_SIGHANDLER */
|
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SIGRETURN (0);
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}
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|
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/* Wait for pid (one of our children) to terminate. This is called only
|
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@ -489,19 +547,19 @@ wait_for (pid)
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break;
|
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}
|
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else if (got_pid < 0 && errno != EINTR)
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programming_error ("got errno %d while waiting for %d", errno, pid);
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programming_error ("wait_for(%d): %s", pid, strerror(errno));
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else if (got_pid > 0)
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set_pid_status (got_pid, status);
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}
|
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|
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set_pid_status (got_pid, status);
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|
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#if defined (_POSIX_VERSION)
|
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#if defined (HAVE_WAITPID)
|
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if (got_pid >= 0)
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reap_zombie_children ();
|
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#endif /* _POSIX_VERSION */
|
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#endif /* HAVE_WAITPID */
|
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|
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if (!interactive_shell)
|
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if (interactive_shell == 0)
|
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{
|
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set_signal_handler (SIGINT, old_sigint_handler);
|
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/* If the job exited because of SIGINT, make sure the shell acts as if
|
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@ -512,14 +570,14 @@ wait_for (pid)
|
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(*old_sigint_handler) (SIGINT);
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}
|
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}
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|
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|
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/* Default return value. */
|
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/* ``a full 8 bits of status is returned'' */
|
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if (WIFSIGNALED (status))
|
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return_val = 128 + WTERMSIG (status);
|
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else
|
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return_val = WEXITSTATUS (status);
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|
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|
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if (!WIFSTOPPED (status) && WIFSIGNALED (status) &&
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(WTERMSIG (status) != SIGINT))
|
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{
|
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|
|
@ -529,7 +587,7 @@ wait_for (pid)
|
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fprintf (stderr, "\n");
|
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}
|
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|
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if (interactive_shell && !subshell_environment)
|
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if (interactive_shell && subshell_environment == 0)
|
||||
{
|
||||
if (WIFSIGNALED (status) || WIFSTOPPED (status))
|
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set_tty_state ();
|
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|
|
@ -559,28 +617,30 @@ kill_pid (pid, signal, group)
|
|||
return (result);
|
||||
}
|
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|
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#if defined (_POSIX_VERSION)
|
||||
#if defined (TERMIOS_TTY_DRIVER)
|
||||
static struct termios shell_tty_info;
|
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#else
|
||||
# if defined (USG)
|
||||
#else /* !TERMIOS_TTY_DRIVER */
|
||||
# if defined (TERMIO_TTY_DRIVER)
|
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static struct termio shell_tty_info;
|
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# 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);
|
||||
|
|
@ -588,24 +648,28 @@ get_tty_state ()
|
|||
#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);
|
||||
|
|
@ -642,3 +706,8 @@ describe_pid (pid)
|
|||
{
|
||||
fprintf (stderr, "%d\n", (int) pid);
|
||||
}
|
||||
|
||||
void
|
||||
unfreeze_jobs_list ()
|
||||
{
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue