sys/src/cmd/rc/trap.c

   1 #include "rc.h"
   2 #include "exec.h"
   3 #include "fns.h"
   4 #include "io.h"
   5 extern char *Signame[];
   6
   7 void
   8 dotrap(void)
   9 {
  10         int i;
  11         struct var *trapreq;
  12         struct word *starval;
  13         starval = vlook("*")->val;
  14         while(ntrap) for(i = 0;i!=NSIG;i++) while(trap[i]){
  15                 --trap[i];
  16                 --ntrap;
  17                 if(getpid()!=mypid) Exit(getstatus());
  18                 trapreq = vlook(Signame[i]);
  19                 if(trapreq->fn){
  20                         start(trapreq->fn, trapreq->pc, (struct var *)0);
  21                         runq->local = newvar(strdup("*"), runq->local);
  22                         runq->local->val = copywords(starval, (struct word *)0);
  23                         runq->local->changed = 1;
  24                         runq->redir = runq->startredir = 0;
  25                 }
  26                 else if(i==SIGINT || i==SIGQUIT){
  27                         /*
  28                          * run the stack down until we uncover the
  29                          * command reading loop.  Xreturn will exit
  30                          * if there is none (i.e. if this is not
  31                          * an interactive rc.)
  32                          */
  33                         while(!runq->iflag) Xreturn();
  34                 }
  35                 else Exit(getstatus());
  36         }
  37 }