plan9fox/sys/src/cmd/rc/trap.c
cinap_lenrek a2f7d03d4e rc: fix slow Xqdol(), avoid recursion in conclist(), estrdup(), avoid copying
Xqdol() used to take quadratic time because of strcat(),
the code isnt really needed as list2str() aready does the
same thing in linear time without the strcat().

add estrdup() which uses emalloc() so allocation error are
catched.

move strdups() of name from callers into newvar().

avoid recursion of conclist(), and avoid copying of word
strings by providing Newword() function which doesnt copy
the word string.
2014-07-23 15:28:37 +02:00

37 lines
870 B
C

#include "rc.h"
#include "exec.h"
#include "fns.h"
#include "io.h"
extern char *Signame[];
void
dotrap(void)
{
int i;
struct var *trapreq;
struct word *starval;
starval = vlook("*")->val;
while(ntrap) for(i = 0;i!=NSIG;i++) while(trap[i]){
--trap[i];
--ntrap;
if(getpid()!=mypid) Exit(getstatus());
trapreq = vlook(Signame[i]);
if(trapreq->fn){
start(trapreq->fn, trapreq->pc, (struct var *)0);
runq->local = newvar("*", runq->local);
runq->local->val = copywords(starval, (struct word *)0);
runq->local->changed = 1;
runq->redir = runq->startredir = 0;
}
else if(i==SIGINT || i==SIGQUIT){
/*
* run the stack down until we uncover the
* command reading loop. Xreturn will exit
* if there is none (i.e. if this is not
* an interactive rc.)
*/
while(!runq->iflag) Xreturn();
}
else Exit(getstatus());
}
}