1 This file is suspend.def, from which is created suspend.c.
2 It implements the builtin "suspend" in Bash.
4 Copyright (C) 1987-2003 Free Software Foundation, Inc.
6 This file is part of GNU Bash, the Bourne Again SHell.
8 Bash is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License along
19 with Bash; see the file COPYING. If not, write to the Free Software
20 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
25 $DEPENDS_ON JOB_CONTROL
26 $FUNCTION suspend_builtin
27 $SHORT_DOC suspend [-f]
28 Suspend the execution of this shell until it receives a SIGCONT
29 signal. The `-f' if specified says not to complain about this
30 being a login shell if it is; just suspend anyway.
35 #if defined (JOB_CONTROL)
36 #if defined (HAVE_UNISTD_H)
38 # include <sys/types.h>
43 #include "../bashtypes.h"
45 #include "../bashintl.h"
49 #include "bashgetopt.h"
51 static sighandler suspend_continue __P((int));
53 static SigHandler *old_cont;
55 static SigHandler *old_stop;
58 /* Continue handler. */
60 suspend_continue (sig)
63 set_signal_handler (SIGCONT, old_cont);
65 set_signal_handler (SIGSTOP, old_stop);
70 /* Suspending the shell. If -f is the arg, then do the suspend
71 no matter what. Otherwise, complain if a login shell. */
73 suspend_builtin (list)
78 reset_internal_getopt ();
80 while ((opt = internal_getopt (list, "f")) != -1)
95 sh_nojobs (_("cannot suspend"));
96 return (EXECUTION_FAILURE);
105 builtin_error (_("cannot suspend a login shell"));
106 return (EXECUTION_FAILURE);
110 /* XXX - should we put ourselves back into the original pgrp now? If so,
111 call end_job_control() here and do the right thing in suspend_continue
112 (that is, call restart_job_control()). */
113 old_cont = (SigHandler *)set_signal_handler (SIGCONT, suspend_continue);
115 old_stop = (SigHandler *)set_signal_handler (SIGSTOP, SIG_DFL);
117 killpg (shell_pgrp, SIGSTOP);
118 return (EXECUTION_SUCCESS);
121 #endif /* JOB_CONTROL */