FILE far *freopen
(const char far *path, const char far *mode, FILE far *stream)
{
fclose(stream);
if(open2 (fileno(stream), path, mflag(mode))==-1)return NULL;
return stream;
}
FILE far* fdopen (int h, char far *type)
{FILE far *fp;
fp=FCBS;
fp+=h;
FCBS[h].flag=mflag(type);
return fp;
}
FILE far *fopen (const char far *path, const char far *mode)
{int h;
FILE far *fp;
if((h=open(path, mflag(mode)))==-1)return NULL;
fp=FCBS;
fp+=h;
return fp;
}
int
execcmd(shinstance *psh, int argc, char **argv)
{
if (argc > 1) {
struct strlist *sp;
iflag(psh) = 0; /* exit on error */
mflag(psh) = 0;
optschanged(psh);
for (sp = psh->cmdenviron; sp; sp = sp->next)
setvareq(psh, sp->text, VEXPORT|VSTACK);
shellexec(psh, argv + 1, environment(psh), pathval(psh), 0, 0);
}
return 0;
}
void
setsignal(shinstance *psh, int signo, int vforked)
{
int action;
shsig_t sigact = SH_SIG_DFL;
char *t, tsig;
if ((t = psh->trap[signo]) == NULL)
action = S_DFL;
else if (*t != '\0')
action = S_CATCH;
else
action = S_IGN;
if (psh->rootshell && !vforked && action == S_DFL) {
switch (signo) {
case SIGINT:
if (iflag(psh) || psh->minusc || sflag(psh) == 0)
action = S_CATCH;
break;
case SIGQUIT:
#ifdef DEBUG
if (debug(psh))
break;
#endif
/* FALLTHROUGH */
case SIGTERM:
if (iflag(psh))
action = S_IGN;
break;
#if JOBS
case SIGTSTP:
case SIGTTOU:
if (mflag(psh))
action = S_IGN;
break;
#endif
}
}
t = &psh->sigmode[signo - 1];
tsig = *t;
if (tsig == 0) {
/*
* current setting unknown
*/
if (!getsigaction(psh, signo, &sigact)) {
/*
* Pretend it worked; maybe we should give a warning
* here, but other shells don't. We don't alter
* sigmode, so that we retry every time.
*/
return;
}
if (sigact == SH_SIG_IGN) {
if (mflag(psh) && (signo == SIGTSTP ||
signo == SIGTTIN || signo == SIGTTOU)) {
tsig = S_IGN; /* don't hard ignore these */
} else
tsig = S_HARD_IGN;
} else {
tsig = S_RESET; /* force to be set */
}
}
if (tsig == S_HARD_IGN || tsig == action)
return;
switch (action) {
case S_DFL: sigact = SH_SIG_DFL; break;
case S_CATCH: sigact = onsig; break;
case S_IGN: sigact = SH_SIG_IGN; break;
}
if (!vforked)
*t = action;
sh_siginterrupt(psh, signo, 1);
sh_signal(psh, signo, sigact);
}
