static void
proc_forkwait(struct proc *p, const char *file, char **argv)
{
int retryEINTR = 0, retryEAGAIN = 0;
pid_t pid;
restart:
switch(pid = fork()) {
case -1:
switch(errno) {
case EINTR:
if (++retryEINTR > NPROC + 1) {
_log_fork(LOG_INFO, errno, file);
}
goto restart;
case EAGAIN:
if (++retryEAGAIN <= RETRY_SYSCALL) {
_log_fork(LOG_INFO, errno, file);
pause_syscall(retryEAGAIN);
goto restart;
}
/* down seems more likely */
default:
die_fork(errno, file);
}
case 0:
proc_child(p, file, argv);
default:
p->pid = pid;
proc_parent(p);
}
}
void doanddie(char *user, unsigned int userlen /* including 0 byte */,
char *pass)
{
int child;
int wstat;
int pi[2];
close(3);
if (pipe(pi) == -1) die_pipe();
if (pi[0] != 3) die_pipe();
switch(child = fork()) {
case -1:
die_fork();
case 0:
close(pi[1]);
sig_pipedefault();
execvp(*childargs,childargs);
_exit(1);
}
close(pi[0]);
substdio_fdbuf(&ssup,subwrite,pi[1],upbuf,sizeof upbuf);
if (substdio_put(&ssup,user,userlen) == -1) die_write();
if (substdio_put(&ssup,pass,str_len(pass) + 1) == -1) die_write();
if (substdio_puts(&ssup,"<") == -1) die_write();
if (substdio_puts(&ssup,unique) == -1) die_write();
if (substdio_puts(&ssup,hostname) == -1) die_write();
if (substdio_put(&ssup,">",2) == -1) die_write();
if (substdio_flush(&ssup) == -1) die_write();
close(pi[1]);
byte_zero(pass,str_len(pass));
byte_zero(upbuf,sizeof upbuf);
if (wait_pid(&wstat,child) == -1) die();
if (wait_crashed(wstat)) die_childcrashed();
switch (wait_exitcode(wstat)) {
case 0: die();
case 1: die_1();
case 2: die_2();
case 25: die_25();
case 3: die_3();
case 4: die_4();
case 5: die_5();
case 6: die_6();
case 61: die_61();
case 62: die_62();
case 7: die_7();
case 8: die_nomem();
default: die_unknown();
}
die();
}
