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#if !defined(lint) && !defined(DOS)
static char rcsid[] = "$Id: signals.c 769 2007-10-24 00:15:40Z hubert@u.washington.edu $";
#endif
/*
* ========================================================================
* Copyright 2006-2007 University of Washington
* Copyright 2013-2020 Eduardo Chappa
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* ========================================================================
*/
#include <system.h>
#include <general.h>
#include "../headers.h"
#include "../../pith/charconv/filesys.h"
#include "tty.h"
#include "signals.h"
/* internal prototypes */
#ifndef _WINDOWS
RETSIGTYPE do_hup_signal(int);
#endif
/*
* picosigs - Install any handlers for the signals we're interested
* in catching.
*/
void
picosigs(void)
{
#ifndef _WINDOWS
signal(SIGHUP, do_hup_signal); /* deal with SIGHUP */
signal(SIGTERM, do_hup_signal); /* deal with SIGTERM */
#ifdef SIGTSTP
signal(SIGTSTP, SIG_DFL);
#endif
#if defined(SIGWINCH) && defined(TIOCGWINSZ)
signal(SIGWINCH, winch_handler); /* window size changes */
#endif
#endif /* !_WINDOWS */
}
#ifndef _WINDOWS
/*
* do_hup_signal - jump back in the stack to where we can handle this
*/
RETSIGTYPE
do_hup_signal(int sig)
{
signal(SIGHUP, SIG_IGN); /* ignore further SIGHUP's */
signal(SIGTERM, SIG_IGN); /* ignore further SIGTERM's */
if(Pmaster){
extern jmp_buf finstate;
longjmp(finstate, COMP_GOTHUP);
}
else{
/*
* if we've been interrupted and the buffer is changed,
* save it...
*/
if(anycb() == TRUE){ /* time to save */
if(curbp->b_fname[0] == '\0'){ /* name it */
strncpy(curbp->b_fname, "pico.save", sizeof(curbp->b_fname));
curbp->b_fname[sizeof(curbp->b_fname)-1] = '\0';
}
else{
strncat(curbp->b_fname, ".save", sizeof(curbp->b_fname)-strlen(curbp->b_fname)-1);
curbp->b_fname[sizeof(curbp->b_fname)-1] = '\0';
}
our_unlink(curbp->b_fname);
writeout(curbp->b_fname, TRUE);
}
vttidy();
exit(1);
}
}
#endif /* !_WINDOWS */
#if defined(SIGWINCH) && defined(TIOCGWINSZ)
/*
* winch_handler - handle window change signal
*/
RETSIGTYPE
winch_handler(int sig)
{
int i;
signal(SIGWINCH, winch_handler);
if(wheadp != NULL)
ttresize();
else if (Pmaster){
i = Pmaster->arm_winch_cleanup;
Pmaster->arm_winch_cleanup = 1;
}
if(Pmaster && Pmaster->winch_cleanup && Pmaster->arm_winch_cleanup)
(*Pmaster->winch_cleanup)();
if(wheadp == NULL && Pmaster != NULL)
Pmaster->arm_winch_cleanup = i;
}
#endif /* SIGWINCH and friends */
#ifdef POSIX_SIGNALS
/*----------------------------------------------------------------------
Reset signals after critical imap code
----*/
void
(*posix_signal(int sig_num, RETSIGTYPE (*action)(int)))(int)
{
struct sigaction new_action, old_action;
memset((void *)&new_action, 0, sizeof(struct sigaction));
sigemptyset (&new_action.sa_mask);
new_action.sa_handler = action;
#ifdef SA_RESTART
new_action.sa_flags = SA_RESTART;
#else
new_action.sa_flags = 0;
#endif
sigaction(sig_num, &new_action, &old_action);
return(old_action.sa_handler);
}
int
posix_sigunblock(int mask)
{
sigset_t sig_mask;
sigemptyset(&sig_mask);
sigaddset(&sig_mask, mask);
#if HAVE_PTHREAD
# define sigprocmask pthread_sigmask
#endif
return(sigprocmask(SIG_UNBLOCK, &sig_mask, NULL));
}
#endif /* POSIX_SIGNALS */
#if defined(sv3) || defined(ct)
/* Placed by rll to handle the rename function not found in AT&T */
int
rename(char *oldname, char *newname)
{
int rtn;
char b[NLINE];
strncpy(b, fname_to_locale(oldname), sizeof(b));
b[sizeof(b)-1] = '\0';
if ((rtn = link(b, fname_to_locale(newname))) != 0) {
perror("Was not able to rename file.");
return(rtn);
}
if ((rtn = our_unlink(b)) != 0)
perror("Was not able to unlink file.");
return(rtn);
}
#endif
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