/* Generic SLIP mangling code */
+static void slip_write(int fd, const uint8_t *p, size_t l)
+{
+ while (l) {
+ ssize_t written=write(fd,p,l);
+ if (written<0) {
+ if (errno==EINTR) {
+ continue;
+ } else if (iswouldblock(errno)) {
+ lg_perror(0,"slip",0,M_ERR,errno,"write() (packet(s) lost)");
+ return;
+ } else {
+ fatal_perror("slip_stuff: write()");
+ }
+ }
+ assert(written>0);
+ assert((size_t)written<=l);
+ p+=written;
+ l-=written;
+ }
+}
+
static void slip_stuff(struct slip *st, struct buffer_if *buf, int fd)
{
uint8_t txbuf[DEFAULT_BUFSIZE];
break;
}
if ((j+2)>DEFAULT_BUFSIZE) {
- if (write(fd,txbuf,j)<0) {
- fatal_perror("slip_stuff: write()");
- }
+ slip_write(fd,txbuf,j);
j=0;
}
}
txbuf[j++]=SLIP_END;
- if (write(fd,txbuf,j)<0) {
- fatal_perror("slip_stuff: write()");
- }
+ slip_write(fd,txbuf,j);
BUF_FREE(buf);
}
if (fds[1].revents&POLLIN) {
l=read(st->rxfd,rxbuf,DEFAULT_BUFSIZE);
if (l<0) {
- if (errno!=EINTR)
+ if (errno!=EINTR && !iswouldblock(errno))
fatal_perror("%s: userv_afterpoll: read(rxfd)",
st->slip.nl.name);
} else if (l==0) {
"(expected %d)\n",pid,st->pid);
return;
}
- if (!st->expecting_userv_exit) {
- if (WIFEXITED(status)) {
- fatal("%s: userv exited unexpectedly with status %d",
- st->slip.nl.name,WEXITSTATUS(status));
- } else if (WIFSIGNALED(status)) {
- fatal("%s: userv exited unexpectedly: uncaught signal %d",
- st->slip.nl.name,WTERMSIG(status));
- } else {
- fatal("%s: userv stopped unexpectedly",
- st->slip.nl.name);
- }
+ if (!(st->expecting_userv_exit &&
+ (!status ||
+ (WIFSIGNALED(status) && WTERMSIG(status)==SIGTERM)))) {
+ lg_exitstatus(0,st->slip.nl.name,0,
+ st->expecting_userv_exit ? M_WARNING : M_FATAL,
+ status,"userv");
}
- Message(M_WARNING,"%s: userv subprocess died with status %d\n",
- st->slip.nl.name,WEXITSTATUS(status));
st->pid=0;
}
dup2(st->out,1);
setsid();
- /* XXX We really should strdup() all of argv[] but because we'll just
- exit anyway if execvp() fails it doesn't seem worth bothering. */
execvp(st->path,(char *const*)st->argv);
perror("userv-entry: execvp()");
exit(1);
st->slip.nl.name,confirm);
}
}
+ setnonblock(st->txfd);
+ setnonblock(st->rxfd);
}
static void userv_kill_userv(struct userv *st)
if (newphase==PHASE_RUN) {
userv_invoke_userv(st);
/* Register for poll() */
- register_for_poll(st, userv_beforepoll, userv_afterpoll, 2,
+ register_for_poll(st, userv_beforepoll, userv_afterpoll,
st->slip.nl.name);
}
if (newphase==PHASE_SHUTDOWN) {