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channel.c
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channel.c
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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
*/
/*
* Implements communication through a socket or any file handle.
*/
#include "vim.h"
#if defined(FEAT_JOB_CHANNEL) || defined(PROTO)
/* TRUE when netbeans is running with a GUI. */
#ifdef FEAT_GUI
# define CH_HAS_GUI (gui.in_use || gui.starting)
#endif
/* Note: when making changes here also adjust configure.ac. */
#ifdef WIN32
/* WinSock API is separated from C API, thus we can't use read(), write(),
* errno... */
# define SOCK_ERRNO errno = WSAGetLastError()
# undef ECONNREFUSED
# define ECONNREFUSED WSAECONNREFUSED
# undef EWOULDBLOCK
# define EWOULDBLOCK WSAEWOULDBLOCK
# undef EINPROGRESS
# define EINPROGRESS WSAEINPROGRESS
# ifdef EINTR
# undef EINTR
# endif
# define EINTR WSAEINTR
# define sock_write(sd, buf, len) send((SOCKET)sd, buf, len, 0)
# define sock_read(sd, buf, len) recv((SOCKET)sd, buf, len, 0)
# define sock_close(sd) closesocket((SOCKET)sd)
#else
# include <netdb.h>
# include <netinet/in.h>
# include <sys/socket.h>
# ifdef HAVE_LIBGEN_H
# include <libgen.h>
# endif
# define SOCK_ERRNO
# define sock_write(sd, buf, len) write(sd, buf, len)
# define sock_read(sd, buf, len) read(sd, buf, len)
# define sock_close(sd) close(sd)
# define fd_read(fd, buf, len) read(fd, buf, len)
# define fd_write(sd, buf, len) write(sd, buf, len)
# define fd_close(sd) close(sd)
#endif
static void channel_read(channel_T *channel, ch_part_T part, char *func);
/* Whether a redraw is needed for appending a line to a buffer. */
static int channel_need_redraw = FALSE;
/* Whether we are inside channel_parse_messages() or another situation where it
* is safe to invoke callbacks. */
static int safe_to_invoke_callback = 0;
static char *part_names[] = {"sock", "out", "err", "in"};
#ifdef WIN32
static int
fd_read(sock_T fd, char *buf, size_t len)
{
HANDLE h = (HANDLE)fd;
DWORD nread;
if (!ReadFile(h, buf, (DWORD)len, &nread, NULL))
return -1;
return (int)nread;
}
static int
fd_write(sock_T fd, char *buf, size_t len)
{
HANDLE h = (HANDLE)fd;
DWORD nwrite;
if (!WriteFile(h, buf, (DWORD)len, &nwrite, NULL))
return -1;
return (int)nwrite;
}
static void
fd_close(sock_T fd)
{
HANDLE h = (HANDLE)fd;
CloseHandle(h);
}
#endif
/* Log file opened with ch_logfile(). */
static FILE *log_fd = NULL;
#ifdef FEAT_RELTIME
static proftime_T log_start;
#endif
void
ch_logfile(char_u *fname, char_u *opt)
{
FILE *file = NULL;
if (log_fd != NULL)
fclose(log_fd);
if (*fname != NUL)
{
file = fopen((char *)fname, *opt == 'w' ? "w" : "a");
if (file == NULL)
{
EMSG2(_(e_notopen), fname);
return;
}
}
log_fd = file;
if (log_fd != NULL)
{
fprintf(log_fd, "==== start log session ====\n");
#ifdef FEAT_RELTIME
profile_start(&log_start);
#endif
}
}
int
ch_log_active(void)
{
return log_fd != NULL;
}
static void
ch_log_lead(const char *what, channel_T *ch)
{
if (log_fd != NULL)
{
#ifdef FEAT_RELTIME
proftime_T log_now;
profile_start(&log_now);
profile_sub(&log_now, &log_start);
fprintf(log_fd, "%s ", profile_msg(&log_now));
#endif
if (ch != NULL)
fprintf(log_fd, "%son %d: ", what, ch->ch_id);
else
fprintf(log_fd, "%s: ", what);
}
}
static int did_log_msg = TRUE;
#ifndef PROTO /* prototype is in vim.h */
void
ch_log(channel_T *ch, const char *fmt, ...)
{
if (log_fd != NULL)
{
va_list ap;
ch_log_lead("", ch);
va_start(ap, fmt);
vfprintf(log_fd, fmt, ap);
va_end(ap);
fputc('\n', log_fd);
fflush(log_fd);
did_log_msg = TRUE;
}
}
#endif
static void
ch_error(channel_T *ch, const char *fmt, ...)
#ifdef USE_PRINTF_FORMAT_ATTRIBUTE
__attribute__((format(printf, 2, 3)))
#endif
;
static void
ch_error(channel_T *ch, const char *fmt, ...)
{
if (log_fd != NULL)
{
va_list ap;
ch_log_lead("ERR ", ch);
va_start(ap, fmt);
vfprintf(log_fd, fmt, ap);
va_end(ap);
fputc('\n', log_fd);
fflush(log_fd);
did_log_msg = TRUE;
}
}
#ifdef _WIN32
# undef PERROR
# define PERROR(msg) (void)emsg3((char_u *)"%s: %s", \
(char_u *)msg, (char_u *)strerror_win32(errno))
static char *
strerror_win32(int eno)
{
static LPVOID msgbuf = NULL;
char_u *ptr;
if (msgbuf)
{
LocalFree(msgbuf);
msgbuf = NULL;
}
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
eno,
MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT),
(LPTSTR) &msgbuf,
0,
NULL);
if (msgbuf != NULL)
/* chomp \r or \n */
for (ptr = (char_u *)msgbuf; *ptr; ptr++)
switch (*ptr)
{
case '\r':
STRMOVE(ptr, ptr + 1);
ptr--;
break;
case '\n':
if (*(ptr + 1) == '\0')
*ptr = '\0';
else
*ptr = ' ';
break;
}
return msgbuf;
}
#endif
/*
* The list of all allocated channels.
*/
static channel_T *first_channel = NULL;
static int next_ch_id = 0;
/*
* Allocate a new channel. The refcount is set to 1.
* The channel isn't actually used until it is opened.
* Returns NULL if out of memory.
*/
channel_T *
add_channel(void)
{
ch_part_T part;
channel_T *channel = (channel_T *)alloc_clear((int)sizeof(channel_T));
if (channel == NULL)
return NULL;
channel->ch_id = next_ch_id++;
ch_log(channel, "Created channel");
for (part = PART_SOCK; part < PART_COUNT; ++part)
{
channel->ch_part[part].ch_fd = INVALID_FD;
#ifdef FEAT_GUI_X11
channel->ch_part[part].ch_inputHandler = (XtInputId)NULL;
#endif
#ifdef FEAT_GUI_GTK
channel->ch_part[part].ch_inputHandler = 0;
#endif
channel->ch_part[part].ch_timeout = 2000;
}
if (first_channel != NULL)
{
first_channel->ch_prev = channel;
channel->ch_next = first_channel;
}
first_channel = channel;
channel->ch_refcount = 1;
return channel;
}
int
has_any_channel(void)
{
return first_channel != NULL;
}
/*
* Called when the refcount of a channel is zero.
* Return TRUE if "channel" has a callback and the associated job wasn't
* killed.
*/
static int
channel_still_useful(channel_T *channel)
{
int has_sock_msg;
int has_out_msg;
int has_err_msg;
/* If the job was killed the channel is not expected to work anymore. */
if (channel->ch_job_killed && channel->ch_job == NULL)
return FALSE;
/* If there is a close callback it may still need to be invoked. */
if (channel->ch_close_cb != NULL)
return TRUE;
/* If reading from or a buffer it's still useful. */
if (channel->ch_part[PART_IN].ch_bufref.br_buf != NULL)
return TRUE;
/* If there is no callback then nobody can get readahead. If the fd is
* closed and there is no readahead then the callback won't be called. */
has_sock_msg = channel->ch_part[PART_SOCK].ch_fd != INVALID_FD
|| channel->ch_part[PART_SOCK].ch_head.rq_next != NULL
|| channel->ch_part[PART_SOCK].ch_json_head.jq_next != NULL;
has_out_msg = channel->ch_part[PART_OUT].ch_fd != INVALID_FD
|| channel->ch_part[PART_OUT].ch_head.rq_next != NULL
|| channel->ch_part[PART_OUT].ch_json_head.jq_next != NULL;
has_err_msg = channel->ch_part[PART_ERR].ch_fd != INVALID_FD
|| channel->ch_part[PART_ERR].ch_head.rq_next != NULL
|| channel->ch_part[PART_ERR].ch_json_head.jq_next != NULL;
return (channel->ch_callback != NULL && (has_sock_msg
|| has_out_msg || has_err_msg))
|| ((channel->ch_part[PART_OUT].ch_callback != NULL
|| channel->ch_part[PART_OUT].ch_bufref.br_buf != NULL)
&& has_out_msg)
|| ((channel->ch_part[PART_ERR].ch_callback != NULL
|| channel->ch_part[PART_ERR].ch_bufref.br_buf != NULL)
&& has_err_msg);
}
/*
* Return TRUE if "channel" is closeable (i.e. all readable fds are closed).
*/
static int
channel_can_close(channel_T *channel)
{
return channel->ch_to_be_closed == 0;
}
/*
* Close a channel and free all its resources.
*/
static void
channel_free_contents(channel_T *channel)
{
channel_close(channel, TRUE);
channel_clear(channel);
ch_log(channel, "Freeing channel");
}
static void
channel_free_channel(channel_T *channel)
{
if (channel->ch_next != NULL)
channel->ch_next->ch_prev = channel->ch_prev;
if (channel->ch_prev == NULL)
first_channel = channel->ch_next;
else
channel->ch_prev->ch_next = channel->ch_next;
vim_free(channel);
}
static void
channel_free(channel_T *channel)
{
if (!in_free_unref_items)
{
if (safe_to_invoke_callback == 0)
channel->ch_to_be_freed = TRUE;
else
{
channel_free_contents(channel);
channel_free_channel(channel);
}
}
}
/*
* Close a channel and free all its resources if there is no further action
* possible, there is no callback to be invoked or the associated job was
* killed.
* Return TRUE if the channel was freed.
*/
static int
channel_may_free(channel_T *channel)
{
if (!channel_still_useful(channel))
{
channel_free(channel);
return TRUE;
}
return FALSE;
}
/*
* Decrement the reference count on "channel" and maybe free it when it goes
* down to zero. Don't free it if there is a pending action.
* Returns TRUE when the channel is no longer referenced.
*/
int
channel_unref(channel_T *channel)
{
if (channel != NULL && --channel->ch_refcount <= 0)
return channel_may_free(channel);
return FALSE;
}
int
free_unused_channels_contents(int copyID, int mask)
{
int did_free = FALSE;
channel_T *ch;
/* This is invoked from the garbage collector, which only runs at a safe
* point. */
++safe_to_invoke_callback;
for (ch = first_channel; ch != NULL; ch = ch->ch_next)
if (!channel_still_useful(ch)
&& (ch->ch_copyID & mask) != (copyID & mask))
{
/* Free the channel and ordinary items it contains, but don't
* recurse into Lists, Dictionaries etc. */
channel_free_contents(ch);
did_free = TRUE;
}
--safe_to_invoke_callback;
return did_free;
}
void
free_unused_channels(int copyID, int mask)
{
channel_T *ch;
channel_T *ch_next;
for (ch = first_channel; ch != NULL; ch = ch_next)
{
ch_next = ch->ch_next;
if (!channel_still_useful(ch)
&& (ch->ch_copyID & mask) != (copyID & mask))
{
/* Free the channel struct itself. */
channel_free_channel(ch);
}
}
}
#if defined(FEAT_GUI) || defined(PROTO)
#if defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK)
static void
channel_read_fd(int fd)
{
channel_T *channel;
ch_part_T part;
channel = channel_fd2channel(fd, &part);
if (channel == NULL)
ch_error(NULL, "Channel for fd %d not found", fd);
else
channel_read(channel, part, "channel_read_fd");
}
#endif
/*
* Read a command from netbeans.
*/
#ifdef FEAT_GUI_X11
static void
messageFromServerX11(XtPointer clientData,
int *unused1 UNUSED,
XtInputId *unused2 UNUSED)
{
channel_read_fd((int)(long)clientData);
}
#endif
#ifdef FEAT_GUI_GTK
# if GTK_CHECK_VERSION(3,0,0)
static gboolean
messageFromServerGtk3(GIOChannel *unused1 UNUSED,
GIOCondition unused2 UNUSED,
gpointer clientData)
{
channel_read_fd(GPOINTER_TO_INT(clientData));
return TRUE; /* Return FALSE instead in case the event source is to
* be removed after this function returns. */
}
# else
static void
messageFromServerGtk2(gpointer clientData,
gint unused1 UNUSED,
GdkInputCondition unused2 UNUSED)
{
channel_read_fd((int)(long)clientData);
}
# endif
#endif
static void
channel_gui_register_one(channel_T *channel, ch_part_T part)
{
if (!CH_HAS_GUI)
return;
/* gets stuck in handling events for a not connected channel */
if (channel->ch_keep_open)
return;
# ifdef FEAT_GUI_X11
/* Tell notifier we are interested in being called when there is input on
* the editor connection socket. */
if (channel->ch_part[part].ch_inputHandler == (XtInputId)NULL)
{
ch_log(channel, "Registering part %s with fd %d",
part_names[part], channel->ch_part[part].ch_fd);
channel->ch_part[part].ch_inputHandler = XtAppAddInput(
(XtAppContext)app_context,
channel->ch_part[part].ch_fd,
(XtPointer)(XtInputReadMask + XtInputExceptMask),
messageFromServerX11,
(XtPointer)(long)channel->ch_part[part].ch_fd);
}
# else
# ifdef FEAT_GUI_GTK
/* Tell gdk we are interested in being called when there is input on the
* editor connection socket. */
if (channel->ch_part[part].ch_inputHandler == 0)
{
ch_log(channel, "Registering part %s with fd %d",
part_names[part], channel->ch_part[part].ch_fd);
# if GTK_CHECK_VERSION(3,0,0)
GIOChannel *chnnl = g_io_channel_unix_new(
(gint)channel->ch_part[part].ch_fd);
channel->ch_part[part].ch_inputHandler = g_io_add_watch(
chnnl,
G_IO_IN|G_IO_HUP|G_IO_ERR|G_IO_PRI,
messageFromServerGtk3,
GINT_TO_POINTER(channel->ch_part[part].ch_fd));
g_io_channel_unref(chnnl);
# else
channel->ch_part[part].ch_inputHandler = gdk_input_add(
(gint)channel->ch_part[part].ch_fd,
(GdkInputCondition)
((int)GDK_INPUT_READ + (int)GDK_INPUT_EXCEPTION),
messageFromServerGtk2,
(gpointer)(long)channel->ch_part[part].ch_fd);
# endif
}
# endif
# endif
}
static void
channel_gui_register(channel_T *channel)
{
if (channel->CH_SOCK_FD != INVALID_FD)
channel_gui_register_one(channel, PART_SOCK);
if (channel->CH_OUT_FD != INVALID_FD
&& channel->CH_OUT_FD != channel->CH_SOCK_FD)
channel_gui_register_one(channel, PART_OUT);
if (channel->CH_ERR_FD != INVALID_FD
&& channel->CH_ERR_FD != channel->CH_SOCK_FD
&& channel->CH_ERR_FD != channel->CH_OUT_FD)
channel_gui_register_one(channel, PART_ERR);
}
/*
* Register any of our file descriptors with the GUI event handling system.
* Called when the GUI has started.
*/
void
channel_gui_register_all(void)
{
channel_T *channel;
for (channel = first_channel; channel != NULL; channel = channel->ch_next)
channel_gui_register(channel);
}
static void
channel_gui_unregister_one(channel_T *channel, ch_part_T part)
{
# ifdef FEAT_GUI_X11
if (channel->ch_part[part].ch_inputHandler != (XtInputId)NULL)
{
ch_log(channel, "Unregistering part %s", part_names[part]);
XtRemoveInput(channel->ch_part[part].ch_inputHandler);
channel->ch_part[part].ch_inputHandler = (XtInputId)NULL;
}
# else
# ifdef FEAT_GUI_GTK
if (channel->ch_part[part].ch_inputHandler != 0)
{
ch_log(channel, "Unregistering part %s", part_names[part]);
# if GTK_CHECK_VERSION(3,0,0)
g_source_remove(channel->ch_part[part].ch_inputHandler);
# else
gdk_input_remove(channel->ch_part[part].ch_inputHandler);
# endif
channel->ch_part[part].ch_inputHandler = 0;
}
# endif
# endif
}
static void
channel_gui_unregister(channel_T *channel)
{
ch_part_T part;
for (part = PART_SOCK; part < PART_IN; ++part)
channel_gui_unregister_one(channel, part);
}
#endif
static char *e_cannot_connect = N_("E902: Cannot connect to port");
/*
* Open a socket channel to "hostname":"port".
* "waittime" is the time in msec to wait for the connection.
* When negative wait forever.
* Returns the channel for success.
* Returns NULL for failure.
*/
channel_T *
channel_open(
char *hostname,
int port_in,
int waittime,
void (*nb_close_cb)(void))
{
int sd = -1;
struct sockaddr_in server;
struct hostent *host;
#ifdef WIN32
u_short port = port_in;
u_long val = 1;
#else
int port = port_in;
#endif
channel_T *channel;
int ret;
#ifdef WIN32
channel_init_winsock();
#endif
channel = add_channel();
if (channel == NULL)
{
ch_error(NULL, "Cannot allocate channel.");
return NULL;
}
/* Get the server internet address and put into addr structure */
/* fill in the socket address structure and connect to server */
vim_memset((char *)&server, 0, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(port);
if ((host = gethostbyname(hostname)) == NULL)
{
ch_error(channel, "in gethostbyname() in channel_open()");
PERROR(_("E901: gethostbyname() in channel_open()"));
channel_free(channel);
return NULL;
}
{
char *p;
/* When using host->h_addr_list[0] directly ubsan warns for it to not
* be aligned. First copy the pointer to avoid that. */
memcpy(&p, &host->h_addr_list[0], sizeof(p));
memcpy((char *)&server.sin_addr, p, host->h_length);
}
/* On Mac and Solaris a zero timeout almost never works. At least wait
* one millisecond. Let's do it for all systems, because we don't know why
* this is needed. */
if (waittime == 0)
waittime = 1;
/*
* For Unix we need to call connect() again after connect() failed.
* On Win32 one time is sufficient.
*/
while (TRUE)
{
long elapsed_msec = 0;
int waitnow;
if (sd >= 0)
sock_close(sd);
sd = socket(AF_INET, SOCK_STREAM, 0);
if (sd == -1)
{
ch_error(channel, "in socket() in channel_open().");
PERROR(_("E898: socket() in channel_open()"));
channel_free(channel);
return NULL;
}
if (waittime >= 0)
{
/* Make connect() non-blocking. */
if (
#ifdef _WIN32
ioctlsocket(sd, FIONBIO, &val) < 0
#else
fcntl(sd, F_SETFL, O_NONBLOCK) < 0
#endif
)
{
SOCK_ERRNO;
ch_error(channel,
"channel_open: Connect failed with errno %d", errno);
sock_close(sd);
channel_free(channel);
return NULL;
}
}
/* Try connecting to the server. */
ch_log(channel, "Connecting to %s port %d", hostname, port);
ret = connect(sd, (struct sockaddr *)&server, sizeof(server));
if (ret == 0)
/* The connection could be established. */
break;
SOCK_ERRNO;
if (waittime < 0 || (errno != EWOULDBLOCK
&& errno != ECONNREFUSED
#ifdef EINPROGRESS
&& errno != EINPROGRESS
#endif
))
{
ch_error(channel,
"channel_open: Connect failed with errno %d", errno);
PERROR(_(e_cannot_connect));
sock_close(sd);
channel_free(channel);
return NULL;
}
/* Limit the waittime to 50 msec. If it doesn't work within this
* time we close the socket and try creating it again. */
waitnow = waittime > 50 ? 50 : waittime;
/* If connect() didn't finish then try using select() to wait for the
* connection to be made. For Win32 always use select() to wait. */
#ifndef WIN32
if (errno != ECONNREFUSED)
#endif
{
struct timeval tv;
fd_set rfds;
fd_set wfds;
#ifndef WIN32
int so_error = 0;
socklen_t so_error_len = sizeof(so_error);
struct timeval start_tv;
struct timeval end_tv;
#endif
FD_ZERO(&rfds);
FD_SET(sd, &rfds);
FD_ZERO(&wfds);
FD_SET(sd, &wfds);
tv.tv_sec = waitnow / 1000;
tv.tv_usec = (waitnow % 1000) * 1000;
#ifndef WIN32
gettimeofday(&start_tv, NULL);
#endif
ch_log(channel,
"Waiting for connection (waiting %d msec)...", waitnow);
ret = select((int)sd + 1, &rfds, &wfds, NULL, &tv);
if (ret < 0)
{
SOCK_ERRNO;
ch_error(channel,
"channel_open: Connect failed with errno %d", errno);
PERROR(_(e_cannot_connect));
sock_close(sd);
channel_free(channel);
return NULL;
}
#ifdef WIN32
/* On Win32: select() is expected to work and wait for up to
* "waitnow" msec for the socket to be open. */
if (FD_ISSET(sd, &wfds))
break;
elapsed_msec = waitnow;
if (waittime > 1 && elapsed_msec < waittime)
{
waittime -= elapsed_msec;
continue;
}
#else
/* On Linux-like systems: See socket(7) for the behavior
* After putting the socket in non-blocking mode, connect() will
* return EINPROGRESS, select() will not wait (as if writing is
* possible), need to use getsockopt() to check if the socket is
* actually able to connect.
* We detect a failure to connect when either read and write fds
* are set. Use getsockopt() to find out what kind of failure. */
if (FD_ISSET(sd, &rfds) || FD_ISSET(sd, &wfds))
{
ret = getsockopt(sd,
SOL_SOCKET, SO_ERROR, &so_error, &so_error_len);
if (ret < 0 || (so_error != 0
&& so_error != EWOULDBLOCK
&& so_error != ECONNREFUSED
# ifdef EINPROGRESS
&& so_error != EINPROGRESS
# endif
))
{
ch_error(channel,
"channel_open: Connect failed with errno %d",
so_error);
PERROR(_(e_cannot_connect));
sock_close(sd);
channel_free(channel);
return NULL;
}
}
if (FD_ISSET(sd, &wfds) && so_error == 0)
/* Did not detect an error, connection is established. */
break;
gettimeofday(&end_tv, NULL);
elapsed_msec = (end_tv.tv_sec - start_tv.tv_sec) * 1000
+ (end_tv.tv_usec - start_tv.tv_usec) / 1000;
#endif
}
#ifndef WIN32
if (waittime > 1 && elapsed_msec < waittime)
{
/* The port isn't ready but we also didn't get an error.
* This happens when the server didn't open the socket
* yet. Select() may return early, wait until the remaining
* "waitnow" and try again. */
waitnow -= elapsed_msec;
waittime -= elapsed_msec;
if (waitnow > 0)
{
mch_delay((long)waitnow, TRUE);
ui_breakcheck();
waittime -= waitnow;
}
if (!got_int)
{
if (waittime <= 0)
/* give it one more try */
waittime = 1;
continue;
}
/* we were interrupted, behave as if timed out */
}
#endif
/* We timed out. */
ch_error(channel, "Connection timed out");
sock_close(sd);
channel_free(channel);
return NULL;
}
ch_log(channel, "Connection made");
if (waittime >= 0)
{
#ifdef _WIN32
val = 0;
ioctlsocket(sd, FIONBIO, &val);
#else
(void)fcntl(sd, F_SETFL, 0);
#endif
}
channel->CH_SOCK_FD = (sock_T)sd;
channel->ch_nb_close_cb = nb_close_cb;
channel->ch_hostname = (char *)vim_strsave((char_u *)hostname);
channel->ch_port = port_in;
channel->ch_to_be_closed |= (1U << PART_SOCK);
#ifdef FEAT_GUI
channel_gui_register_one(channel, PART_SOCK);
#endif
return channel;
}
/*
* Implements ch_open().
*/
channel_T *
channel_open_func(typval_T *argvars)
{
char_u *address;
char_u *p;
char *rest;
int port;
jobopt_T opt;
channel_T *channel = NULL;
address = get_tv_string(&argvars[0]);
if (argvars[1].v_type != VAR_UNKNOWN
&& (argvars[1].v_type != VAR_DICT || argvars[1].vval.v_dict == NULL))
{
EMSG(_(e_invarg));
return NULL;
}
/* parse address */
p = vim_strchr(address, ':');
if (p == NULL)
{
EMSG2(_(e_invarg2), address);
return NULL;
}
*p++ = NUL;
port = strtol((char *)p, &rest, 10);
if (*address == NUL || port <= 0 || *rest != NUL)
{
p[-1] = ':';
EMSG2(_(e_invarg2), address);
return NULL;
}
/* parse options */
clear_job_options(&opt);
opt.jo_mode = MODE_JSON;
opt.jo_timeout = 2000;
if (get_job_options(&argvars[1], &opt,
JO_MODE_ALL + JO_CB_ALL + JO_WAITTIME + JO_TIMEOUT_ALL, 0) == FAIL)
goto theend;
if (opt.jo_timeout < 0)
{
EMSG(_(e_invarg));
goto theend;
}
channel = channel_open((char *)address, port, opt.jo_waittime, NULL);
if (channel != NULL)
{
opt.jo_set = JO_ALL;
channel_set_options(channel, &opt);
}
theend:
free_job_options(&opt);
return channel;
}
static void
ch_close_part(channel_T *channel, ch_part_T part)
{
sock_T *fd = &channel->ch_part[part].ch_fd;
if (*fd != INVALID_FD)
{
if (part == PART_SOCK)
sock_close(*fd);
else
{
/* When using a pty the same FD is set on multiple parts, only
* close it when the last reference is closed. */
if ((part == PART_IN || channel->CH_IN_FD != *fd)
&& (part == PART_OUT || channel->CH_OUT_FD != *fd)
&& (part == PART_ERR || channel->CH_ERR_FD != *fd))
{
#ifdef WIN32