mirror of
https://github.com/jart/cosmopolitan.git
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95 lines
1.8 KiB
C
95 lines
1.8 KiB
C
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/* suspend.c, created from suspend.def. */
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#line 22 "./suspend.def"
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#line 40 "./suspend.def"
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#include "config.h"
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#if defined (JOB_CONTROL)
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#if defined (HAVE_UNISTD_H)
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# ifdef _MINIX
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# include <sys/types.h>
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# endif
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# include <unistd.h>
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#endif
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#include "bashtypes.h"
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#include <signal.h>
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#include "bashintl.h"
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#include "shell.h"
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#include "jobs.h"
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#include "common.h"
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#include "bashgetopt.h"
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static sighandler suspend_continue PARAMS((int));
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static SigHandler *old_cont;
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#if 0
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static SigHandler *old_stop;
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#endif
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/* Continue handler. */
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static sighandler
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suspend_continue (sig)
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int sig;
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{
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set_signal_handler (SIGCONT, old_cont);
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#if 0
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set_signal_handler (SIGSTOP, old_stop);
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#endif
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SIGRETURN (0);
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}
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/* Suspending the shell. If -f is the arg, then do the suspend
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no matter what. Otherwise, complain if a login shell. */
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int
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suspend_builtin (list)
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WORD_LIST *list;
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{
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int opt, force;
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reset_internal_getopt ();
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force = 0;
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while ((opt = internal_getopt (list, "f")) != -1)
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switch (opt)
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{
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case 'f':
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force++;
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break;
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CASE_HELPOPT;
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default:
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builtin_usage ();
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return (EX_USAGE);
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}
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list = loptend;
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no_args (list);
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if (force == 0)
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{
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if (job_control == 0)
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{
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sh_nojobs (_("cannot suspend"));
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return (EXECUTION_FAILURE);
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}
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if (login_shell)
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{
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builtin_error (_("cannot suspend a login shell"));
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return (EXECUTION_FAILURE);
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}
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}
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/* XXX - should we put ourselves back into the original pgrp now? If so,
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call end_job_control() here and do the right thing in suspend_continue
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(that is, call restart_job_control()). */
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old_cont = (SigHandler *)set_signal_handler (SIGCONT, suspend_continue);
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#if 0
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old_stop = (SigHandler *)set_signal_handler (SIGSTOP, SIG_DFL);
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#endif
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killpg (shell_pgrp, SIGSTOP);
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return (EXECUTION_SUCCESS);
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}
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#endif /* JOB_CONTROL */
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