/*
* Escape to local shell
*/
void
shell(void)
{
int shpid, status;
char *cp;
printf("[sh]\r\n");
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
unraw();
if ((shpid = fork())) {
while (shpid != wait(&status));
raw();
printf("\r\n!\r\n");
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
return;
} else {
signal(SIGQUIT, SIG_DFL);
signal(SIGINT, SIG_DFL);
if ((cp = rindex(value(SHELL), '/')) == NULL)
cp = value(SHELL);
else
cp++;
shell_uid();
execl(value(SHELL), cp, NULL);
printf("\r\ncan't execl!\r\n");
exit(1);
}
}
static void
execute(char *s)
{
register char *cp;
if ((cp = rindex(value(SHELL), '/')) == NULL)
cp = value(SHELL);
else
cp++;
shell_uid();
execl(value(SHELL), cp, "-c", s, NULL);
}
static void
execute(char *s)
{
char *cp;
if ((cp = strrchr(value(SHELL), '/')) == NULL)
cp = value(SHELL);
else
cp++;
shell_uid();
execl(value(SHELL), cp, "-c", s, (char *)NULL);
}
char *
expand(char *name)
{
static char xname[BUFSIZ];
char cmdbuf[BUFSIZ];
register int pid, l;
register char *cp, *Shell;
int s, pivec[2] /*, (*sigint)()*/;
if (!anyof(name, "~{[*?$`'\"\\"))
return(name);
/* sigint = signal(SIGINT, SIG_IGN); */
if (pipe(pivec) < 0) {
warn("pipe");
/* signal(SIGINT, sigint) */
return(name);
}
snprintf(cmdbuf, sizeof(cmdbuf), "echo %s", name);
if ((pid = vfork()) == 0) {
Shell = value(SHELL);
if (Shell == NULL)
Shell = _PATH_BSHELL;
close(pivec[0]);
close(1);
dup(pivec[1]);
close(pivec[1]);
close(2);
shell_uid();
execl(Shell, Shell, "-c", cmdbuf, NULL);
_exit(1);
}
if (pid == -1) {
warn("fork");
close(pivec[0]);
close(pivec[1]);
return(NULL);
}
close(pivec[1]);
l = read(pivec[0], xname, BUFSIZ);
close(pivec[0]);
while (wait(&s) != pid);
;
s &= 0377;
if (s != 0 && s != SIGPIPE) {
fprintf(stderr, "\"Echo\" failed\n");
return(NULL);
}
if (l < 0) {
warn("read");
return(NULL);
}
if (l == 0) {
fprintf(stderr, "\"%s\": No match\n", name);
return(NULL);
}
if (l == BUFSIZ) {
fprintf(stderr, "Buffer overflow expanding \"%s\"\n", name);
return(NULL);
}
xname[l] = 0;
for (cp = &xname[l-1]; *cp == '\n' && cp > xname; cp--)
;
*++cp = '\0';
return(xname);
}
