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Added handling of SIGUSR2 for the new event interruption handling,

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bumping up the protocol revision. Made some debug messages not be
output when it's not necessary.
This commit is contained in:
Ove Kaaven 1999-03-25 10:52:03 +00:00 committed by Alexandre Julliard
parent 866b3376a5
commit 9ea09ca866
1 changed files with 23 additions and 8 deletions
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25
loader/dos/dosmod.c
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@ -69,6 +69,7 @@ int XREAD(int fd,void*buf,int size) {
perror("dosmod read");
return -1;
}
if (res) /* don't print the EOF condition */
fprintf(stderr,"dosmod read only %d of %d bytes.\n",res,size);
return res;
}
@ -108,7 +109,7 @@ void get_timer(struct timeval*tim)
*tim=cur.it_value;
}
volatile int sig_pend,sig_fatal=0,sig_alrm=0;
volatile int sig_pend,sig_fatal=0,sig_alrm=0,sig_cb=0;
void*img;
struct vm86plus_struct VM86;
@ -121,8 +122,10 @@ void sig_handler(int sig)
void bad_handler(int sig)
{
if (sig!=SIGTERM) {
fprintf(stderr,"DOSMOD caught fatal signal %d\n",sig);
fprintf(stderr,"(Last known VM86 CS:IP was %04x:%04lx)\n",VM86.regs.cs,VM86.regs.eip);
}
sig_pend=sig; sig_fatal++;
signal(sig,bad_handler);
}
@ -133,6 +136,12 @@ void alarm_handler(int sig)
signal(sig,alarm_handler);
}
void cb_handler(int sig)
{
sig_cb++;
signal(sig,cb_handler);
}
int main(int argc,char**argv)
{
int mfd=open(argv[0],O_RDWR);
@ -169,7 +178,7 @@ int main(int argc,char**argv)
signal(SIGHUP,sig_handler);
signal(SIGINT,sig_handler);
signal(SIGUSR1,sig_handler);
signal(SIGUSR2,sig_handler);
signal(SIGUSR2,cb_handler);
signal(SIGALRM,alarm_handler);
signal(SIGQUIT,bad_handler);
@ -183,7 +192,7 @@ int main(int argc,char**argv)
set_timer(&tim);
#endif
/* report back to the main program that we're ready */
ret=1; /* dosmod protocol revision 1 */
ret=2; /* dosmod protocol revision */
XWRITE(1,&ret,sizeof(ret));
/* context exchange loop */
do {
@ -202,14 +211,20 @@ int main(int argc,char**argv)
case DOSMOD_ENTER:
default:
if (XREAD(0,&VM86,sizeof(VM86))!=sizeof(VM86)) return 1;
if (sig_pend||sig_alrm) ret=DOSMOD_SIGNAL; else
if (sig_pend||sig_alrm||sig_cb) ret=DOSMOD_SIGNAL; else
ret=vm86plus(func,&VM86);
if (XWRITE(1,&ret,sizeof(ret))!=sizeof(ret)) return 1;
if (XWRITE(1,&VM86,sizeof(VM86))!=sizeof(VM86)) return 1;
switch (ret&0xff) {
case DOSMOD_SIGNAL:
ret=sig_pend; sig_pend=0;
if (!ret) { ret=SIGALRM; sig_alrm--; }
if (!ret) {
if (sig_alrm) {
ret=SIGALRM; sig_alrm--;
} else {
ret=SIGUSR2; sig_cb--;
}
}
if (XWRITE(1,&ret,sizeof(ret))!=sizeof(ret)) return 1;
if (sig_fatal) return 1;
break;