/*
* Add a \IM. `tags' points to a zero-terminated chain of
* zero-terminated strings ("first\0second\0thirdandlast\0\0").
* `text' points to a word list.
*
* Guarantee on calling sequence: all implicit merges are given
* before the explicit ones.
*/
void index_merge(indexdata *idx, int is_explicit, wchar_t *tags, word *text,
filepos *fpos) {
indextag *t, *existing;
/*
* For an implicit merge, we want to remove all emphasis,
* because the chances are that the user didn't really want to
* index the term as emphasised.
*/
{
word *w;
for (w = text; w; w = w->next) {
if (w->type == word_Emph)
w->type = word_Normal;
else if (w->type == word_EmphSpace)
w->type = word_WhiteSpace;
else if (w->type == word_EmphQuote)
w->type = word_Quote;
}
}
/*
* FIXME: want to warn on overlapping source sets.
*/
for (; *tags; tags = uadv(tags)) {
t = make_indextag();
t->name = tags;
existing = add234(idx->tags, t);
if (existing == t) {
/*
* Duplicate this so we can free it independently.
*/
t->name = ustrdup(tags);
/*
* Every tag has an implicit \IM. So if this tag
* doesn't exist and we're explicit, then we should
* warn (and drop it, since it won't be referenced).
*/
if (is_explicit) {
error(err_nosuchidxtag, fpos, tags);
continue;
}
/*
* Otherwise, this is a new tag with an implicit \IM.
*/
t->implicit_text = text;
t->implicit_fpos = *fpos;
} else {
if (!is_explicit) {
/*
* An implicit \IM for a tag that's had an implicit
* \IM before. FIXME: we should check the text
* against the existing text and warn on
* differences. And check the tag for case match
* against the existing tag, likewise.
*/
/*
* Check the tag against its previous occurrence to
* see if the cases match.
*/
if (ustrcmp(t->name, existing->name)) {
error(err_indexcase, fpos, t->name,
&existing->implicit_fpos, existing->name);
}
sfree(t);
} else {
/*
* An explicit \IM added to a valid tag. In
* particular, this removes the implicit \IM if
* present.
*/
sfree(t);
t = existing;
if (t->implicit_text) {
free_word_list(t->implicit_text);
t->implicit_text = NULL;
}
if (t->nexplicit >= t->explicit_size) {
t->explicit_size = t->nexplicit + 8;
t->explicit_texts = sresize(t->explicit_texts,
t->explicit_size, word *);
t->explicit_fpos = sresize(t->explicit_fpos,
t->explicit_size, filepos);
}
t->explicit_texts[t->nexplicit] = text;
t->explicit_fpos[t->nexplicit] = *fpos;
t->nexplicit++;
}
}
}
Socket platform_new_connection(SockAddr addr, char *hostname,
int port, int privport,
int oobinline, int nodelay, int keepalive,
Plug plug, Conf *conf)
{
char *cmd;
static const struct socket_function_table socket_fn_table = {
sk_localproxy_plug,
sk_localproxy_close,
sk_localproxy_write,
sk_localproxy_write_oob,
sk_localproxy_write_eof,
sk_localproxy_flush,
sk_localproxy_set_frozen,
sk_localproxy_socket_error,
NULL, /* peer_info */
};
Local_Proxy_Socket ret;
int to_cmd_pipe[2], from_cmd_pipe[2], pid;
if (conf_get_int(conf, CONF_proxy_type) != PROXY_CMD)
return NULL;
cmd = format_telnet_command(addr, port, conf);
ret = snew(struct Socket_localproxy_tag);
ret->fn = &socket_fn_table;
ret->plug = plug;
ret->error = NULL;
ret->outgoingeof = EOF_NO;
bufchain_init(&ret->pending_input_data);
bufchain_init(&ret->pending_output_data);
/*
* Create the pipes to the proxy command, and spawn the proxy
* command process.
*/
if (pipe(to_cmd_pipe) < 0 ||
pipe(from_cmd_pipe) < 0) {
ret->error = dupprintf("pipe: %s", strerror(errno));
sfree(cmd);
return (Socket)ret;
}
cloexec(to_cmd_pipe[1]);
cloexec(from_cmd_pipe[0]);
pid = fork();
if (pid < 0) {
ret->error = dupprintf("fork: %s", strerror(errno));
sfree(cmd);
return (Socket)ret;
} else if (pid == 0) {
close(0);
close(1);
dup2(to_cmd_pipe[0], 0);
dup2(from_cmd_pipe[1], 1);
close(to_cmd_pipe[0]);
close(from_cmd_pipe[1]);
noncloexec(0);
noncloexec(1);
execl("/bin/sh", "sh", "-c", cmd, (void *)NULL);
_exit(255);
}
sfree(cmd);
close(to_cmd_pipe[0]);
close(from_cmd_pipe[1]);
ret->to_cmd = to_cmd_pipe[1];
ret->from_cmd = from_cmd_pipe[0];
if (!localproxy_by_fromfd)
localproxy_by_fromfd = newtree234(localproxy_fromfd_cmp);
if (!localproxy_by_tofd)
localproxy_by_tofd = newtree234(localproxy_tofd_cmp);
add234(localproxy_by_fromfd, ret);
add234(localproxy_by_tofd, ret);
uxsel_set(ret->from_cmd, 1, localproxy_select_result);
/* We are responsible for this and don't need it any more */
sk_addr_free(addr);
return (Socket) ret;
}
static void pty_open_master(Pty pty)
{
#ifdef BSD_PTYS
const char chars1[] = "pqrstuvwxyz";
const char chars2[] = "0123456789abcdef";
const char *p1, *p2;
char master_name[20];
struct group *gp;
for (p1 = chars1; *p1; p1++)
for (p2 = chars2; *p2; p2++) {
sprintf(master_name, "/dev/pty%c%c", *p1, *p2);
pty->master_fd = open(master_name, O_RDWR);
if (pty->master_fd >= 0) {
if (geteuid() == 0 ||
access(master_name, R_OK | W_OK) == 0) {
/*
* We must also check at this point that we are
* able to open the slave side of the pty. We
* wouldn't want to allocate the wrong master,
* get all the way down to forking, and _then_
* find we're unable to open the slave.
*/
strcpy(pty->name, master_name);
pty->name[5] = 't'; /* /dev/ptyXX -> /dev/ttyXX */
cloexec(pty->master_fd);
if (pty_open_slave(pty) >= 0 &&
access(pty->name, R_OK | W_OK) == 0)
goto got_one;
if (pty->slave_fd > 0)
close(pty->slave_fd);
pty->slave_fd = -1;
}
close(pty->master_fd);
}
}
/* If we get here, we couldn't get a tty at all. */
fprintf(stderr, "pterm: unable to open a pseudo-terminal device\n");
exit(1);
got_one:
/* We need to chown/chmod the /dev/ttyXX device. */
gp = getgrnam("tty");
chown(pty->name, getuid(), gp ? gp->gr_gid : -1);
chmod(pty->name, 0600);
#else
const int flags = O_RDWR
#ifdef O_NOCTTY
| O_NOCTTY
#endif
;
#ifdef HAVE_POSIX_OPENPT
#ifdef SET_NONBLOCK_VIA_OPENPT
/*
* OS X, as of 10.10 at least, doesn't permit me to set O_NONBLOCK
* on pty master fds via the usual fcntl mechanism. Fortunately,
* it does let me work around this by adding O_NONBLOCK to the
* posix_openpt flags parameter, which isn't a documented use of
* the API but seems to work. So we'll do that for now.
*/
pty->master_fd = posix_openpt(flags | O_NONBLOCK);
#else
pty->master_fd = posix_openpt(flags);
#endif
if (pty->master_fd < 0) {
perror("posix_openpt");
exit(1);
}
#else
pty->master_fd = open("/dev/ptmx", flags);
if (pty->master_fd < 0) {
perror("/dev/ptmx: open");
exit(1);
}
#endif
if (grantpt(pty->master_fd) < 0) {
perror("grantpt");
exit(1);
}
if (unlockpt(pty->master_fd) < 0) {
perror("unlockpt");
exit(1);
}
cloexec(pty->master_fd);
pty->name[FILENAME_MAX-1] = '\0';
strncpy(pty->name, ptsname(pty->master_fd), FILENAME_MAX-1);
#endif
#ifndef SET_NONBLOCK_VIA_OPENPT
nonblock(pty->master_fd);
#endif
if (!ptys_by_fd)
ptys_by_fd = newtree234(pty_compare_by_fd);
add234(ptys_by_fd, pty);
}
char *winsock_error_string(int error)
{
const char prefix[] = "Network error: ";
struct errstring *es;
/*
* Error codes we know about and have historically had reasonably
* sensible error messages for.
*/
switch (error) {
case WSAEACCES:
return "Network error: Permission denied";
case WSAEADDRINUSE:
return "Network error: Address already in use";
case WSAEADDRNOTAVAIL:
return "Network error: Cannot assign requested address";
case WSAEAFNOSUPPORT:
return
"Network error: Address family not supported by protocol family";
case WSAEALREADY:
return "Network error: Operation already in progress";
case WSAECONNABORTED:
return "Network error: Software caused connection abort";
case WSAECONNREFUSED:
return "Network error: Connection refused";
case WSAECONNRESET:
return "Network error: Connection reset by peer";
case WSAEDESTADDRREQ:
return "Network error: Destination address required";
case WSAEFAULT:
return "Network error: Bad address";
case WSAEHOSTDOWN:
return "Network error: Host is down";
case WSAEHOSTUNREACH:
return "Network error: No route to host";
case WSAEINPROGRESS:
return "Network error: Operation now in progress";
case WSAEINTR:
return "Network error: Interrupted function call";
case WSAEINVAL:
return "Network error: Invalid argument";
case WSAEISCONN:
return "Network error: Socket is already connected";
case WSAEMFILE:
return "Network error: Too many open files";
case WSAEMSGSIZE:
return "Network error: Message too long";
case WSAENETDOWN:
return "Network error: Network is down";
case WSAENETRESET:
return "Network error: Network dropped connection on reset";
case WSAENETUNREACH:
return "Network error: Network is unreachable";
case WSAENOBUFS:
return "Network error: No buffer space available";
case WSAENOPROTOOPT:
return "Network error: Bad protocol option";
case WSAENOTCONN:
return "Network error: Socket is not connected";
case WSAENOTSOCK:
return "Network error: Socket operation on non-socket";
case WSAEOPNOTSUPP:
return "Network error: Operation not supported";
case WSAEPFNOSUPPORT:
return "Network error: Protocol family not supported";
case WSAEPROCLIM:
return "Network error: Too many processes";
case WSAEPROTONOSUPPORT:
return "Network error: Protocol not supported";
case WSAEPROTOTYPE:
return "Network error: Protocol wrong type for socket";
case WSAESHUTDOWN:
return "Network error: Cannot send after socket shutdown";
case WSAESOCKTNOSUPPORT:
return "Network error: Socket type not supported";
case WSAETIMEDOUT:
return "Network error: Connection timed out";
case WSAEWOULDBLOCK:
return "Network error: Resource temporarily unavailable";
case WSAEDISCON:
return "Network error: Graceful shutdown in progress";
}
/*
* Generic code to handle any other error.
*
* Slightly nasty hack here: we want to return a static string
* which the caller will never have to worry about freeing, but on
* the other hand if we call FormatMessage to get it then it will
* want to either allocate a buffer or write into one we own.
*
* So what we do is to maintain a tree234 of error strings we've
* already used. New ones are allocated from the heap, but then
* put in this tree and kept forever.
*/
if (!errstrings)
errstrings = newtree234(errstring_compare);
es = find234(errstrings, &error, errstring_find);
if (!es) {
int bufsize, bufused;
es = snew(struct errstring);
es->error = error;
/* maximum size for FormatMessage is 64K */
bufsize = 65535 + sizeof(prefix);
es->text = snewn(bufsize, char);
strcpy(es->text, prefix);
bufused = strlen(es->text);
if (!FormatMessage((FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS), NULL, error,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
es->text + bufused, bufsize - bufused, NULL)) {
sprintf(es->text + bufused,
"Windows error code %d (and FormatMessage returned %d)",
error, GetLastError());
} else {
int len = strlen(es->text);
if (len > 0 && es->text[len-1] == '\n')
es->text[len-1] = '\0';
}
es->text = sresize(es->text, strlen(es->text) + 1, char);
add234(errstrings, es);
}