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-rw-r--r--erts/emulator/beam/erl_alloc.types2
-rw-r--r--erts/emulator/drivers/unix/ttsl_drv.c166
-rw-r--r--erts/emulator/drivers/win32/ttsl_drv.c16
-rw-r--r--erts/emulator/sys/unix/sys.c253
-rw-r--r--lib/kernel/src/group.erl148
-rw-r--r--lib/kernel/src/user_drv.erl131
-rw-r--r--lib/ssh/src/ssh_cli.erl51
7 files changed, 614 insertions, 153 deletions
diff --git a/erts/emulator/beam/erl_alloc.types b/erts/emulator/beam/erl_alloc.types
index df33bbc2f7..6163e4129a 100644
--- a/erts/emulator/beam/erl_alloc.types
+++ b/erts/emulator/beam/erl_alloc.types
@@ -414,6 +414,8 @@ type CS_PROG_PATH LONG_LIVED SYSTEM cs_prog_path
type ENVIRONMENT TEMPORARY SYSTEM environment
type PUTENV_STR SYSTEM SYSTEM putenv_string
type PRT_REP_EXIT STANDARD SYSTEM port_report_exit
+type SYS_BLOCKING STANDARD SYSTEM sys_blocking
+type SYS_WRITE_BUF TEMPORARY SYSTEM sys_write_buf
+endif
diff --git a/erts/emulator/drivers/unix/ttsl_drv.c b/erts/emulator/drivers/unix/ttsl_drv.c
index 491e0a090e..be2fee1f25 100644
--- a/erts/emulator/drivers/unix/ttsl_drv.c
+++ b/erts/emulator/drivers/unix/ttsl_drv.c
@@ -32,6 +32,10 @@ static ErlDrvData ttysl_start(ErlDrvPort, char*);
#ifdef HAVE_TERMCAP /* else make an empty driver that can not be opened */
+#ifndef WANT_NONBLOCKING
+#define WANT_NONBLOCKING
+#endif
+
#include "sys.h"
#include <ctype.h>
#include <stdlib.h>
@@ -39,6 +43,7 @@ static ErlDrvData ttysl_start(ErlDrvPort, char*);
#include <string.h>
#include <signal.h>
#include <fcntl.h>
+#include <limits.h>
#include <locale.h>
#include <unistd.h>
#include <termios.h>
@@ -57,6 +62,14 @@ static ErlDrvData ttysl_start(ErlDrvPort, char*);
#include <langinfo.h>
#endif
+#if defined IOV_MAX
+#define MAXIOV IOV_MAX
+#elif defined UIO_MAXIOV
+#define MAXIOV UIO_MAXIOV
+#else
+#define MAXIOV 16
+#endif
+
#define TRUE 1
#define FALSE 0
@@ -80,12 +93,15 @@ static volatile int cols_needs_update = FALSE;
#define OP_INSC 2
#define OP_DELC 3
#define OP_BEEP 4
+#define OP_PUTC_SYNC 5
/* Control op */
#define CTRL_OP_GET_WINSIZE 100
#define CTRL_OP_GET_UNICODE_STATE 101
#define CTRL_OP_SET_UNICODE_STATE 102
-
+/* We use 1024 as the buf size as that was the default buf size of FILE streams
+ on all platforms that I checked. */
+#define TTY_BUFFSIZE 1024
static int lbuf_size = BUFSIZ;
static Uint32 *lbuf; /* The current line buffer */
@@ -113,13 +129,19 @@ static int lpos; /* The current "cursor position" in the line buf
/* Main interface functions. */
static void ttysl_stop(ErlDrvData);
static void ttysl_from_erlang(ErlDrvData, char*, ErlDrvSizeT);
+static void ttysl_to_tty(ErlDrvData, ErlDrvEvent);
+static void ttysl_flush_tty(ErlDrvData);
static void ttysl_from_tty(ErlDrvData, ErlDrvEvent);
static void ttysl_stop_select(ErlDrvEvent, void*);
static Sint16 get_sint16(char*);
static ErlDrvPort ttysl_port;
static int ttysl_fd;
-static FILE *ttysl_out;
+static int ttysl_terminate = 0;
+static int ttysl_send_ok = 0;
+static ErlDrvBinary *putcbuf;
+static int putcpos;
+static int putclen;
/* Functions that work on the line buffer. */
static int start_lbuf(void);
@@ -201,22 +223,22 @@ struct erl_drv_entry ttsl_driver_entry = {
IF_IMPL(ttysl_stop),
IF_IMPL(ttysl_from_erlang),
IF_IMPL(ttysl_from_tty),
- NULL,
- "tty_sl",
- NULL,
- NULL,
+ IF_IMPL(ttysl_to_tty),
+ "tty_sl", /* driver_name */
+ NULL, /* finish */
+ NULL, /* handle */
IF_IMPL(ttysl_control),
NULL, /* timeout */
NULL, /* outputv */
NULL, /* ready_async */
- NULL, /* flush */
+ IF_IMPL(ttysl_flush_tty),
NULL, /* call */
NULL, /* event */
ERL_DRV_EXTENDED_MARKER,
ERL_DRV_EXTENDED_MAJOR_VERSION,
ERL_DRV_EXTENDED_MINOR_VERSION,
0, /* ERL_DRV_FLAGs */
- NULL,
+ NULL, /* handle2 */
NULL, /* process_exit */
IF_IMPL(ttysl_stop_select)
};
@@ -296,8 +318,7 @@ static ErlDrvData ttysl_start(ErlDrvPort port, char* buf)
return ERL_DRV_ERROR_GENERAL;
}
- /* Open the terminal and set the terminal */
- ttysl_out = fdopen(ttysl_fd, "w");
+ SET_NONBLOCKING(ttysl_fd);
#ifdef PRIMITIVE_UTF8_CHECK
setlocale(LC_CTYPE, ""); /* Set international environment,
@@ -400,12 +421,14 @@ static void ttysl_stop(ErlDrvData ttysl_data)
stop_lbuf();
stop_termcap();
tty_reset(ttysl_fd);
- driver_select(ttysl_port, (ErlDrvEvent)(UWord)ttysl_fd, ERL_DRV_READ|ERL_DRV_USE, 0);
+ driver_select(ttysl_port, (ErlDrvEvent)(UWord)ttysl_fd,
+ ERL_DRV_WRITE|ERL_DRV_READ|ERL_DRV_USE, 0);
sys_sigset(SIGCONT, SIG_DFL);
sys_sigset(SIGWINCH, SIG_DFL);
}
ttysl_port = (ErlDrvPort)-1;
ttysl_fd = -1;
+ ttysl_terminate = 0;
/* return TRUE; */
}
@@ -650,10 +673,26 @@ static int check_buf_size(byte *s, int n)
static void ttysl_from_erlang(ErlDrvData ttysl_data, char* buf, ErlDrvSizeT count)
{
+ ErlDrvSizeT sz;
+
+ sz = driver_sizeq(ttysl_port);
+
+ putclen = count > TTY_BUFFSIZE ? TTY_BUFFSIZE : count;
+ putcbuf = driver_alloc_binary(putclen);
+ putcpos = 0;
+
if (lpos > MAXSIZE)
put_chars((byte*)"\n", 1);
switch (buf[0]) {
+ case OP_PUTC_SYNC:
+ /* Using sync means that we have to send an ok to the
+ controlling process for each command call. We delay
+ sending ok if the driver queue exceeds a certain size.
+ We do not set ourselves as a busy port, as this
+ could be very bad for user_drv, if it gets blocked on
+ the port_command. */
+ /* fall through */
case OP_PUTC:
DEBUGLOG(("OP: Putc(%lu)",(unsigned long) count-1));
if (check_buf_size((byte*)buf+1, count-1) == 0)
@@ -678,10 +717,104 @@ static void ttysl_from_erlang(ErlDrvData ttysl_data, char* buf, ErlDrvSizeT coun
/* Unknown op, just ignore. */
break;
}
- fflush(ttysl_out);
+
+ driver_enq_bin(ttysl_port,putcbuf,0,putcpos);
+
+ if (sz == 0) {
+ for (;;) {
+ int written, qlen;
+ SysIOVec *iov;
+
+ iov = driver_peekq(ttysl_port,&qlen);
+ if (iov)
+ written = writev(ttysl_fd, iov, qlen > MAXIOV ? MAXIOV : qlen);
+ else
+ written = 0;
+ if (written < 0) {
+ if (errno == EAGAIN) {
+ driver_select(ttysl_port,(ErlDrvEvent)(long)ttysl_fd,
+ ERL_DRV_USE|ERL_DRV_WRITE,1);
+ break;
+ } else {
+ /* we ignore all other errors */
+ break;
+ }
+ } else {
+ if (driver_deq(ttysl_port, written) == 0)
+ break;
+ }
+ }
+ }
+
+ if (buf[0] == OP_PUTC_SYNC) {
+ if (driver_sizeq(ttysl_port) > TTY_BUFFSIZE && !ttysl_terminate) {
+ /* We delay sending the ack until the buffer has been consumed */
+ ttysl_send_ok = 1;
+ } else {
+ ErlDrvTermData spec[] = {
+ ERL_DRV_PORT, driver_mk_port(ttysl_port),
+ ERL_DRV_ATOM, driver_mk_atom("ok"),
+ ERL_DRV_TUPLE, 2
+ };
+ ASSERT(ttysl_send_ok == 0);
+ erl_drv_output_term(driver_mk_port(ttysl_port), spec,
+ sizeof(spec) / sizeof(spec[0]));
+ }
+ }
+
return; /* TRUE; */
}
+static void ttysl_to_tty(ErlDrvData ttysl_data, ErlDrvEvent fd) {
+ for (;;) {
+ int written, qlen;
+ SysIOVec *iov;
+ ErlDrvSizeT sz;
+
+ iov = driver_peekq(ttysl_port,&qlen);
+ if (iov)
+ written = writev(ttysl_fd, iov, qlen > MAXIOV ? MAXIOV : qlen);
+ else
+ written = 0;
+ if (written < 0) {
+ if (errno == EAGAIN) {
+ break;
+ } else {
+ /* we ignore all other errors */
+ }
+ } else {
+ sz = driver_deq(ttysl_port, written);
+ if (sz < TTY_BUFFSIZE && ttysl_send_ok) {
+ ErlDrvTermData spec[] = {
+ ERL_DRV_PORT, driver_mk_port(ttysl_port),
+ ERL_DRV_ATOM, driver_mk_atom("ok"),
+ ERL_DRV_TUPLE, 2
+ };
+ ttysl_send_ok = 0;
+ erl_drv_output_term(driver_mk_port(ttysl_port), spec,
+ sizeof(spec) / sizeof(spec[0]));
+ }
+ if (sz == 0) {
+ driver_select(ttysl_port,(ErlDrvEvent)(long)ttysl_fd,
+ ERL_DRV_WRITE,0);
+ if (ttysl_terminate)
+ /* flush has been called, which means we should terminate
+ when queue is empty. This will not send any exit
+ message */
+ driver_failure_atom(ttysl_port, "normal");
+ break;
+ }
+ }
+ }
+
+ return;
+}
+
+static void ttysl_flush_tty(ErlDrvData ttysl_data) {
+ ttysl_terminate = 1;
+ return;
+}
+
static void ttysl_from_tty(ErlDrvData ttysl_data, ErlDrvEvent fd)
{
byte b[1024];
@@ -1070,7 +1203,14 @@ static int write_buf(Uint32 *s, int n)
/* The basic procedure for outputting one character. */
static int outc(int c)
{
- return (int)putc(c, ttysl_out);
+ putcbuf->orig_bytes[putcpos++] = c;
+ if (putcpos == putclen) {
+ driver_enq_bin(ttysl_port,putcbuf,0,putclen);
+ putcpos = 0;
+ putclen = TTY_BUFFSIZE;
+ putcbuf = driver_alloc_binary(BUFSIZ);
+ }
+ return 1;
}
static int move_cursor(int from, int to)
diff --git a/erts/emulator/drivers/win32/ttsl_drv.c b/erts/emulator/drivers/win32/ttsl_drv.c
index 502cb58dfa..851c336a11 100644
--- a/erts/emulator/drivers/win32/ttsl_drv.c
+++ b/erts/emulator/drivers/win32/ttsl_drv.c
@@ -46,6 +46,7 @@ static int rows; /* Number of rows available. */
#define OP_INSC 2
#define OP_DELC 3
#define OP_BEEP 4
+#define OP_PUTC_SYNC 5
/* Control op */
#define CTRL_OP_GET_WINSIZE 100
@@ -458,6 +459,7 @@ static void ttysl_from_erlang(ErlDrvData ttysl_data, char* buf, ErlDrvSizeT coun
switch (buf[0]) {
case OP_PUTC:
+ case OP_PUTC_SYNC:
DEBUGLOG(("OP: Putc(%I64u)",(unsigned long long)count-1));
if (check_buf_size((byte*)buf+1, count-1) == 0)
return;
@@ -481,6 +483,20 @@ static void ttysl_from_erlang(ErlDrvData ttysl_data, char* buf, ErlDrvSizeT coun
/* Unknown op, just ignore. */
break;
}
+
+ if (buf[0] == OP_PUTC_SYNC) {
+ /* On windows we do a blocking write to the tty so we just
+ send the ack immidiately. If at some point in the future
+ someone has a problem with tty output being blocking
+ this has to be changed. */
+ ErlDrvTermData spec[] = {
+ ERL_DRV_PORT, driver_mk_port(ttysl_port),
+ ERL_DRV_ATOM, driver_mk_atom("ok"),
+ ERL_DRV_TUPLE, 2
+ };
+ erl_drv_output_term(driver_mk_port(ttysl_port), spec,
+ sizeof(spec) / sizeof(spec[0]));
+ }
return;
}
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index c3d7440409..eed93cb2a0 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -34,6 +34,7 @@
#include <termios.h>
#include <ctype.h>
#include <sys/utsname.h>
+#include <sys/select.h>
#ifdef ISC32
#include <sys/bsdtypes.h>
@@ -91,8 +92,10 @@ static erts_smp_rwmtx_t environ_rwmtx;
# else
# define CHLDWTHR 0
# endif
+# define FDBLOCK 1
#else
# define CHLDWTHR 0
+# define FDBLOCK 0
#endif
/*
* [OTP-3906]
@@ -121,6 +124,15 @@ struct ErtsSysReportExit_ {
#endif
};
+/* Used by the fd driver iff the fd could not be set to non-blocking */
+typedef struct ErtsSysBlocking_ {
+ ErlDrvPDL pdl;
+ int res;
+ int err;
+ unsigned int pkey;
+} ErtsSysBlocking;
+
+
/* This data is shared by these drivers - initialized by spawn_init() */
static struct driver_data {
ErlDrvPort port_num;
@@ -129,6 +141,8 @@ static struct driver_data {
int pid;
int alive;
int status;
+ int terminating;
+ ErtsSysBlocking *blocking;
} *driver_data; /* indexed by fd */
static ErtsSysReportExit *report_exit_list;
@@ -1108,11 +1122,16 @@ void fini_getenv_state(GETENV_STATE *state)
/* Driver interfaces */
static ErlDrvData spawn_start(ErlDrvPort, char*, SysDriverOpts*);
static ErlDrvData fd_start(ErlDrvPort, char*, SysDriverOpts*);
+#if FDBLOCK
+static void fd_async(void *);
+static void fd_ready_async(ErlDrvData drv_data, ErlDrvThreadData thread_data);
+#endif
static ErlDrvSSizeT fd_control(ErlDrvData, unsigned int, char *, ErlDrvSizeT,
char **, ErlDrvSizeT);
static ErlDrvData vanilla_start(ErlDrvPort, char*, SysDriverOpts*);
static int spawn_init(void);
static void fd_stop(ErlDrvData);
+static void fd_flush(ErlDrvData);
static void stop(ErlDrvData);
static void ready_input(ErlDrvData, ErlDrvEvent);
static void ready_output(ErlDrvData, ErlDrvEvent);
@@ -1157,8 +1176,12 @@ struct erl_drv_entry fd_driver_entry = {
fd_control,
NULL,
outputv,
- NULL, /* ready_async */
- NULL, /* flush */
+#if FDBLOCK
+ fd_ready_async, /* ready_async */
+#else
+ NULL,
+#endif
+ fd_flush, /* flush */
NULL, /* call */
NULL, /* event */
ERL_DRV_EXTENDED_MARKER,
@@ -1212,13 +1235,28 @@ static RETSIGTYPE onchld(int signum)
#endif
}
+static int set_blocking_data(struct driver_data *dd) {
+
+ dd->blocking = erts_alloc(ERTS_ALC_T_SYS_BLOCKING, sizeof(ErtsSysBlocking));
+
+ erts_smp_atomic_add_nob(&sys_misc_mem_sz, sizeof(ErtsSysBlocking));
+
+ dd->blocking->pdl = driver_pdl_create(dd->port_num);
+ dd->blocking->res = 0;
+ dd->blocking->err = 0;
+ dd->blocking->pkey = driver_async_port_key(dd->port_num);
+
+ return 1;
+}
+
static int set_driver_data(ErlDrvPort port_num,
int ifd,
int ofd,
int packet_bytes,
int read_write,
int exit_status,
- int pid)
+ int pid,
+ int is_blocking)
{
Port *prt;
ErtsSysReportExit *report_exit;
@@ -1250,8 +1288,13 @@ static int set_driver_data(ErlDrvPort port_num,
driver_data[ifd].pid = pid;
driver_data[ifd].alive = 1;
driver_data[ifd].status = 0;
+ driver_data[ifd].terminating = 0;
+ driver_data[ifd].blocking = NULL;
if (read_write & DO_WRITE) {
driver_data[ifd].ofd = ofd;
+ if (is_blocking && FDBLOCK)
+ if (!set_blocking_data(driver_data+ifd))
+ return -1;
if (ifd != ofd)
driver_data[ofd] = driver_data[ifd]; /* structure copy */
} else { /* DO_READ only */
@@ -1267,6 +1310,11 @@ static int set_driver_data(ErlDrvPort port_num,
driver_data[ofd].pid = pid;
driver_data[ofd].alive = 1;
driver_data[ofd].status = 0;
+ driver_data[ofd].terminating = 0;
+ driver_data[ofd].blocking = NULL;
+ if (is_blocking && FDBLOCK)
+ if (!set_blocking_data(driver_data+ofd))
+ return -1;
return(ofd);
}
}
@@ -1276,6 +1324,7 @@ static int spawn_init()
int i;
#if CHLDWTHR
erts_thr_opts_t thr_opts = ERTS_THR_OPTS_DEFAULT_INITER;
+
thr_opts.detached = 0;
thr_opts.suggested_stack_size = 0; /* Smallest possible */
#endif
@@ -1755,7 +1804,7 @@ static ErlDrvData spawn_start(ErlDrvPort port_num, char* name, SysDriverOpts* op
}
res = set_driver_data(port_num, ifd[0], ofd[1], opts->packet_bytes,
- opts->read_write, opts->exit_status, pid);
+ opts->read_write, opts->exit_status, pid, 0);
/* Don't unblock SIGCHLD until now, since the call above must
first complete putting away the info about our new subprocess. */
unblock_signals();
@@ -1840,6 +1889,7 @@ static ErlDrvData fd_start(ErlDrvPort port_num, char* name,
SysDriverOpts* opts)
{
ErlDrvData res;
+ int non_blocking = 0;
if (((opts->read_write & DO_READ) && opts->ifd >= max_files) ||
((opts->read_write & DO_WRITE) && opts->ofd >= max_files))
@@ -1912,6 +1962,20 @@ static ErlDrvData fd_start(ErlDrvPort port_num, char* name,
* case - it can be called with any old pre-existing file descriptors,
* the relations between which (if they're even two) we can only guess
* at - still, we try our best...
+ *
+ * Added note OTP 18: Some systems seem to use stdout/stderr to log data
+ * using unix pipes, so we cannot allow the system to block on a write.
+ * Therefore we use an async thread to write the data to fd's that could
+ * not be set to non-blocking. When no async threads are available we
+ * fall back on the old behaviour.
+ *
+ * Also the guarantee about what is delivered to the OS has changed.
+ * Pre 18 the fd driver did no flushing of data before terminating.
+ * Now it does. This is because we want to be able to guarantee that things
+ * such as escripts and friends really have outputted all data before
+ * terminating. This could potentially block the termination of the system
+ * for a very long time, but if the user wants to terminate fast she should
+ * use erlang:halt with flush=false.
*/
if (opts->read_write & DO_READ) {
@@ -1934,6 +1998,7 @@ static ErlDrvData fd_start(ErlDrvPort port_num, char* name,
imagine a scenario where setting non-blocking mode
here would cause problems - go ahead and do it. */
+ non_blocking = 1;
SET_NONBLOCKING(opts->ofd);
} else { /* output fd is a tty, input fd isn't */
@@ -1976,6 +2041,7 @@ static ErlDrvData fd_start(ErlDrvPort port_num, char* name,
(nfd = open(tty, O_WRONLY)) != -1) {
dup2(nfd, opts->ofd);
close(nfd);
+ non_blocking = 1;
SET_NONBLOCKING(opts->ofd);
}
}
@@ -1984,8 +2050,9 @@ static ErlDrvData fd_start(ErlDrvPort port_num, char* name,
}
CHLD_STAT_LOCK;
res = (ErlDrvData)(long)set_driver_data(port_num, opts->ifd, opts->ofd,
- opts->packet_bytes,
- opts->read_write, 0, -1);
+ opts->packet_bytes,
+ opts->read_write, 0, -1,
+ !non_blocking);
CHLD_STAT_UNLOCK;
return res;
}
@@ -2011,14 +2078,30 @@ static void nbio_stop_fd(ErlDrvPort prt, int fd)
SET_BLOCKING(fd);
}
-static void fd_stop(ErlDrvData fd) /* Does not close the fds */
+static void fd_stop(ErlDrvData ev) /* Does not close the fds */
{
int ofd;
+ int fd = (int)(long)ev;
+ ErlDrvPort prt = driver_data[fd].port_num;
- nbio_stop_fd(driver_data[(int)(long)fd].port_num, (int)(long)fd);
- ofd = driver_data[(int)(long)fd].ofd;
- if (ofd != (int)(long)fd && ofd != -1)
- nbio_stop_fd(driver_data[(int)(long)fd].port_num, (int)(long)ofd);
+#if FDBLOCK
+ if (driver_data[fd].blocking) {
+ erts_free(ERTS_ALC_T_SYS_BLOCKING,driver_data[fd].blocking);
+ driver_data[fd].blocking = NULL;
+ erts_smp_atomic_add_nob(&sys_misc_mem_sz, -1*sizeof(ErtsSysBlocking));
+ }
+#endif
+
+ nbio_stop_fd(prt, fd);
+ ofd = driver_data[fd].ofd;
+ if (ofd != fd && ofd != -1)
+ nbio_stop_fd(prt, ofd);
+}
+
+static void fd_flush(ErlDrvData fd)
+{
+ if (!driver_data[(int)(long)fd].terminating)
+ driver_data[(int)(long)fd].terminating = 1;
}
static ErlDrvData vanilla_start(ErlDrvPort port_num, char* name,
@@ -2041,8 +2124,8 @@ static ErlDrvData vanilla_start(ErlDrvPort port_num, char* name,
CHLD_STAT_LOCK;
res = (ErlDrvData)(long)set_driver_data(port_num, fd, fd,
- opts->packet_bytes,
- opts->read_write, 0, -1);
+ opts->packet_bytes,
+ opts->read_write, 0, -1, 0);
CHLD_STAT_UNLOCK;
return res;
}
@@ -2079,6 +2162,7 @@ static void stop(ErlDrvData fd)
}
}
+/* used by fd_driver */
static void outputv(ErlDrvData e, ErlIOVec* ev)
{
int fd = (int)(long)e;
@@ -2104,12 +2188,21 @@ static void outputv(ErlDrvData e, ErlIOVec* ev)
ev->iov[0].iov_base = lbp;
ev->iov[0].iov_len = pb;
ev->size += pb;
+
+ if (driver_data[fd].blocking && FDBLOCK)
+ driver_pdl_lock(driver_data[fd].blocking->pdl);
+
if ((sz = driver_sizeq(ix)) > 0) {
driver_enqv(ix, ev, 0);
+
+ if (driver_data[fd].blocking && FDBLOCK)
+ driver_pdl_unlock(driver_data[fd].blocking->pdl);
+
if (sz + ev->size >= (1 << 13))
set_busy_port(ix, 1);
}
- else {
+ else if (!driver_data[fd].blocking || !FDBLOCK) {
+ /* We try to write directly if the fd in non-blocking */
int vsize = ev->vsize > MAX_VSIZE ? MAX_VSIZE : ev->vsize;
n = writev(ofd, (const void *) (ev->iov), vsize);
@@ -2125,10 +2218,22 @@ static void outputv(ErlDrvData e, ErlIOVec* ev)
driver_enqv(ix, ev, n); /* n is the skip value */
driver_select(ix, ofd, ERL_DRV_WRITE|ERL_DRV_USE, 1);
}
+#if FDBLOCK
+ else {
+ if (ev->size != 0) {
+ driver_enqv(ix, ev, 0);
+ driver_pdl_unlock(driver_data[fd].blocking->pdl);
+ driver_async(ix, &driver_data[fd].blocking->pkey,
+ fd_async, driver_data+fd, NULL);
+ } else {
+ driver_pdl_unlock(driver_data[fd].blocking->pdl);
+ }
+ }
+#endif
/* return 0;*/
}
-
+/* Used by spawn_driver and vanilla driver */
static void output(ErlDrvData e, char* buf, ErlDrvSizeT len)
{
int fd = (int)(long)e;
@@ -2191,6 +2296,23 @@ static int port_inp_failure(ErlDrvPort port_num, int ready_fd, int res)
ASSERT(res <= 0);
(void) driver_select(port_num, ready_fd, ERL_DRV_READ|ERL_DRV_WRITE, 0);
clear_fd_data(ready_fd);
+
+ if (driver_data[ready_fd].blocking && FDBLOCK) {
+ driver_pdl_lock(driver_data[ready_fd].blocking->pdl);
+ if (driver_sizeq(driver_data[ready_fd].port_num) > 0) {
+ driver_pdl_unlock(driver_data[ready_fd].blocking->pdl);
+ /* We have stuff in the output queue, so we just
+ set the state to terminating and wait for fd_async_ready
+ to terminate the port */
+ if (res == 0)
+ driver_data[ready_fd].terminating = 2;
+ else
+ driver_data[ready_fd].terminating = -err;
+ return 0;
+ }
+ driver_pdl_unlock(driver_data[ready_fd].blocking->pdl);
+ }
+
if (res == 0) {
if (driver_data[ready_fd].report_exit) {
CHLD_STAT_LOCK;
@@ -2241,6 +2363,7 @@ static void ready_input(ErlDrvData e, ErlDrvEvent ready_fd)
port_num = driver_data[fd].port_num;
packet_bytes = driver_data[fd].packet_bytes;
+
if (packet_bytes == 0) {
byte *read_buf = (byte *) erts_alloc(ERTS_ALC_T_SYS_READ_BUF,
ERTS_SYS_READ_BUF_SZ);
@@ -2364,6 +2487,8 @@ static void ready_output(ErlDrvData e, ErlDrvEvent ready_fd)
if ((iv = (struct iovec*) driver_peekq(ix, &vsize)) == NULL) {
driver_select(ix, ready_fd, ERL_DRV_WRITE, 0);
+ if (driver_data[fd].terminating)
+ driver_failure_atom(driver_data[fd].port_num,"normal");
return; /* 0; */
}
vsize = vsize > MAX_VSIZE ? MAX_VSIZE : vsize;
@@ -2389,6 +2514,82 @@ static void stop_select(ErlDrvEvent fd, void* _)
close((int)fd);
}
+#if FDBLOCK
+
+static void
+fd_async(void *async_data)
+{
+ int res;
+ struct driver_data *dd = (struct driver_data*)async_data;
+ SysIOVec *iov0;
+ SysIOVec *iov;
+ int iovlen;
+ int iovcnt;
+ int p;
+ /* much of this code is stolen from efile_drv:invoke_writev */
+ driver_pdl_lock(dd->blocking->pdl);
+ iov0 = driver_peekq(dd->port_num, &iovlen);
+ /* Calculate iovcnt */
+ for (p = 0, iovcnt = 0; iovcnt < iovlen;
+ p += iov0[iovcnt++].iov_len)
+ ;
+ iov = erts_alloc_fnf(ERTS_ALC_T_SYS_WRITE_BUF,
+ sizeof(SysIOVec)*iovcnt);
+ if (!iov) {
+ res = -1;
+ errno = ENOMEM;
+ erts_free(ERTS_ALC_T_SYS_WRITE_BUF, iov);
+ driver_pdl_unlock(dd->blocking->pdl);
+ } else {
+ memcpy(iov,iov0,iovcnt*sizeof(SysIOVec));
+ driver_pdl_unlock(dd->blocking->pdl);
+
+ res = writev(dd->ofd, iov, iovlen);
+
+ erts_free(ERTS_ALC_T_SYS_WRITE_BUF, iov);
+ }
+ dd->blocking->res = res;
+ dd->blocking->err = errno;
+}
+
+void fd_ready_async(ErlDrvData drv_data,
+ ErlDrvThreadData thread_data) {
+ struct driver_data *dd = (struct driver_data *)thread_data;
+ ErlDrvPort port_num = dd->port_num;
+
+ ASSERT(dd->blocking);
+ ASSERT(dd == (driver_data + (int)(long)drv_data));
+
+ if (dd->blocking->res > 0) {
+ driver_pdl_lock(dd->blocking->pdl);
+ if (driver_deq(port_num, dd->blocking->res) == 0) {
+ driver_pdl_unlock(dd->blocking->pdl);
+ set_busy_port(port_num, 0);
+ if (dd->terminating) {
+ /* The port is has been ordered to terminate
+ from either fd_flush or port_inp_failure */
+ if (dd->terminating == 1)
+ driver_failure_atom(port_num, "normal");
+ else if (dd->terminating == 2)
+ driver_failure_eof(port_num);
+ else if (dd->terminating < 0)
+ driver_failure_posix(port_num, -dd->terminating);
+ return; /* -1; */
+ }
+ } else {
+ driver_pdl_unlock(dd->blocking->pdl);
+ /* still data left to write in queue */
+ driver_async(port_num, &dd->blocking->pkey, fd_async, dd, NULL);
+ return /* 0; */;
+ }
+ } else if (dd->blocking->res < 0) {
+ driver_failure_posix(port_num, dd->blocking->err);
+ return; /* -1; */
+ }
+ return; /* 0; */
+}
+
+#endif
void erts_do_break_handling(void)
{
@@ -2658,18 +2859,30 @@ void sys_preload_end(Preload* p)
/* Nothing */
}
-/* Read a key from console (?) */
-
+/* Read a key from console, used by break.c
+ Here we assume that all schedulers are stopped so that erl_poll
+ does not interfere with the select below.
+*/
int sys_get_key(fd)
int fd;
{
- int c;
+ int c, ret;
unsigned char rbuf[64];
+ fd_set fds;
fflush(stdout); /* Flush query ??? */
- if ((c = read(fd,rbuf,64)) <= 0) {
- return c;
+ FD_ZERO(&fds);
+ FD_SET(fd,&fds);
+
+ ret = select(fd+1, &fds, NULL, NULL, NULL);
+
+ if (ret == 1) {
+ do {
+ c = read(fd,rbuf,64);
+ } while (c < 0 && errno == EAGAIN);
+ if (c <= 0)
+ return c;
}
return rbuf[0];
diff --git a/lib/kernel/src/group.erl b/lib/kernel/src/group.erl
index b36dbf33dd..046885f885 100644
--- a/lib/kernel/src/group.erl
+++ b/lib/kernel/src/group.erl
@@ -111,8 +111,13 @@ start_shell1(Fun) ->
server_loop(Drv, Shell, Buf0) ->
receive
{io_request,From,ReplyAs,Req} when is_pid(From) ->
- Buf = io_request(Req, From, ReplyAs, Drv, Buf0),
- server_loop(Drv, Shell, Buf);
+ %% This io_request may cause a transition to a couple of
+ %% selective receive loops elsewhere in this module.
+ Buf = io_request(Req, From, ReplyAs, Drv, Buf0),
+ server_loop(Drv, Shell, Buf);
+ {reply,{{From,ReplyAs},Reply}} ->
+ io_reply(From, ReplyAs, Reply),
+ server_loop(Drv, Shell, Buf0);
{driver_id,ReplyTo} ->
ReplyTo ! {self(),driver_id,Drv},
server_loop(Drv, Shell, Buf0);
@@ -172,10 +177,13 @@ set_unicode_state(Drv,Bool) ->
io_request(Req, From, ReplyAs, Drv, Buf0) ->
- case io_request(Req, Drv, Buf0) of
+ case io_request(Req, Drv, {From,ReplyAs}, Buf0) of
{ok,Reply,Buf} ->
io_reply(From, ReplyAs, Reply),
Buf;
+ {noreply,Buf} ->
+ %% We expect a {reply,_} message from the Drv when request is done
+ Buf;
{error,Reply,Buf} ->
io_reply(From, ReplyAs, Reply),
Buf;
@@ -196,78 +204,85 @@ io_request(Req, From, ReplyAs, Drv, Buf0) ->
%% io_request({put_chars,unicode,Binary}, Drv, Buf) when is_binary(Binary) ->
%% send_drv(Drv, {put_chars,Binary}),
%% {ok,ok,Buf};
-io_request({put_chars,unicode,Chars}, Drv, Buf) ->
+%%
+%% These put requests have to be synchronous to the driver as otherwise
+%% there is no guarantee that the data has actually been printed.
+io_request({put_chars,unicode,Chars}, Drv, From, Buf) ->
case catch unicode:characters_to_binary(Chars,utf8) of
Binary when is_binary(Binary) ->
- send_drv(Drv, {put_chars, unicode, Binary}),
- {ok,ok,Buf};
+ send_drv(Drv, {put_chars_sync, unicode, Binary, {From,ok}}),
+ {noreply,Buf};
_ ->
{error,{error,{put_chars, unicode,Chars}},Buf}
end;
-io_request({put_chars,unicode,M,F,As}, Drv, Buf) ->
+io_request({put_chars,unicode,M,F,As}, Drv, From, Buf) ->
case catch apply(M, F, As) of
Binary when is_binary(Binary) ->
- send_drv(Drv, {put_chars, unicode,Binary}),
- {ok,ok,Buf};
+ send_drv(Drv, {put_chars_sync, unicode, Binary, {From,ok}}),
+ {noreply,Buf};
Chars ->
case catch unicode:characters_to_binary(Chars,utf8) of
B when is_binary(B) ->
- send_drv(Drv, {put_chars, unicode,B}),
- {ok,ok,Buf};
+ send_drv(Drv, {put_chars_sync, unicode, B, {From,ok}}),
+ {noreply,Buf};
_ ->
{error,{error,F},Buf}
end
end;
-io_request({put_chars,latin1,Binary}, Drv, Buf) when is_binary(Binary) ->
- send_drv(Drv, {put_chars, unicode,unicode:characters_to_binary(Binary,latin1)}),
- {ok,ok,Buf};
-io_request({put_chars,latin1,Chars}, Drv, Buf) ->
+io_request({put_chars,latin1,Binary}, Drv, From, Buf) when is_binary(Binary) ->
+ send_drv(Drv, {put_chars_sync, unicode,
+ unicode:characters_to_binary(Binary,latin1),
+ {From,ok}}),
+ {noreply,Buf};
+io_request({put_chars,latin1,Chars}, Drv, From, Buf) ->
case catch unicode:characters_to_binary(Chars,latin1) of
Binary when is_binary(Binary) ->
- send_drv(Drv, {put_chars, unicode,Binary}),
- {ok,ok,Buf};
+ send_drv(Drv, {put_chars_sync, unicode, Binary, {From,ok}}),
+ {noreply,Buf};
_ ->
{error,{error,{put_chars,latin1,Chars}},Buf}
end;
-io_request({put_chars,latin1,M,F,As}, Drv, Buf) ->
+io_request({put_chars,latin1,M,F,As}, Drv, From, Buf) ->
case catch apply(M, F, As) of
Binary when is_binary(Binary) ->
- send_drv(Drv, {put_chars, unicode,unicode:characters_to_binary(Binary,latin1)}),
- {ok,ok,Buf};
+ send_drv(Drv, {put_chars_sync, unicode,
+ unicode:characters_to_binary(Binary,latin1),
+ {From,ok}}),
+ {noreply,Buf};
Chars ->
case catch unicode:characters_to_binary(Chars,latin1) of
B when is_binary(B) ->
- send_drv(Drv, {put_chars, unicode,B}),
- {ok,ok,Buf};
+ send_drv(Drv, {put_chars_sync, unicode, B, {From,ok}}),
+ {noreply,Buf};
_ ->
{error,{error,F},Buf}
end
end;
-io_request({get_chars,Encoding,Prompt,N}, Drv, Buf) ->
+io_request({get_chars,Encoding,Prompt,N}, Drv, _From, Buf) ->
get_chars(Prompt, io_lib, collect_chars, N, Drv, Buf, Encoding);
-io_request({get_line,Encoding,Prompt}, Drv, Buf) ->
+io_request({get_line,Encoding,Prompt}, Drv, _From, Buf) ->
get_chars(Prompt, io_lib, collect_line, [], Drv, Buf, Encoding);
-io_request({get_until,Encoding, Prompt,M,F,As}, Drv, Buf) ->
+io_request({get_until,Encoding, Prompt,M,F,As}, Drv, _From, Buf) ->
get_chars(Prompt, io_lib, get_until, {M,F,As}, Drv, Buf, Encoding);
-io_request({get_password,_Encoding},Drv,Buf) ->
+io_request({get_password,_Encoding},Drv,_From,Buf) ->
get_password_chars(Drv, Buf);
-io_request({setopts,Opts}, Drv, Buf) when is_list(Opts) ->
+io_request({setopts,Opts}, Drv, _From, Buf) when is_list(Opts) ->
setopts(Opts, Drv, Buf);
-io_request(getopts, Drv, Buf) ->
+io_request(getopts, Drv, _From, Buf) ->
getopts(Drv, Buf);
-io_request({requests,Reqs}, Drv, Buf) ->
- io_requests(Reqs, {ok,ok,Buf}, Drv);
+io_request({requests,Reqs}, Drv, From, Buf) ->
+ io_requests(Reqs, {ok,ok,Buf}, From, Drv);
%% New in R12
-io_request({get_geometry,columns},Drv,Buf) ->
+io_request({get_geometry,columns},Drv,_From,Buf) ->
case get_tty_geometry(Drv) of
{W,_H} ->
{ok,W,Buf};
_ ->
{error,{error,enotsup},Buf}
end;
-io_request({get_geometry,rows},Drv,Buf) ->
+io_request({get_geometry,rows},Drv,_From,Buf) ->
case get_tty_geometry(Drv) of
{_W,H} ->
{ok,H,Buf};
@@ -276,38 +291,49 @@ io_request({get_geometry,rows},Drv,Buf) ->
end;
%% BC with pre-R13
-io_request({put_chars,Chars}, Drv, Buf) ->
- io_request({put_chars,latin1,Chars}, Drv, Buf);
-io_request({put_chars,M,F,As}, Drv, Buf) ->
- io_request({put_chars,latin1,M,F,As}, Drv, Buf);
-io_request({get_chars,Prompt,N}, Drv, Buf) ->
- io_request({get_chars,latin1,Prompt,N}, Drv, Buf);
-io_request({get_line,Prompt}, Drv, Buf) ->
- io_request({get_line,latin1,Prompt}, Drv, Buf);
-io_request({get_until, Prompt,M,F,As}, Drv, Buf) ->
- io_request({get_until,latin1, Prompt,M,F,As}, Drv, Buf);
-io_request(get_password,Drv,Buf) ->
- io_request({get_password,latin1},Drv,Buf);
-
-
-
-io_request(_, _Drv, Buf) ->
+io_request({put_chars,Chars}, Drv, From, Buf) ->
+ io_request({put_chars,latin1,Chars}, Drv, From, Buf);
+io_request({put_chars,M,F,As}, Drv, From, Buf) ->
+ io_request({put_chars,latin1,M,F,As}, Drv, From, Buf);
+io_request({get_chars,Prompt,N}, Drv, From, Buf) ->
+ io_request({get_chars,latin1,Prompt,N}, Drv, From, Buf);
+io_request({get_line,Prompt}, Drv, From, Buf) ->
+ io_request({get_line,latin1,Prompt}, Drv, From, Buf);
+io_request({get_until, Prompt,M,F,As}, Drv, From, Buf) ->
+ io_request({get_until,latin1, Prompt,M,F,As}, Drv, From, Buf);
+io_request(get_password,Drv,From,Buf) ->
+ io_request({get_password,latin1},Drv,From,Buf);
+
+
+
+io_request(_, _Drv, _From, Buf) ->
{error,{error,request},Buf}.
-%% Status = io_requests(RequestList, PrevStat, Drv)
-%% Process a list of output requests as long as the previous status is 'ok'.
-
-io_requests([R|Rs], {ok,ok,Buf}, Drv) ->
- io_requests(Rs, io_request(R, Drv, Buf), Drv);
-io_requests([_|_], Error, _Drv) ->
+%% Status = io_requests(RequestList, PrevStat, From, Drv)
+%% Process a list of output requests as long as
+%% the previous status is 'ok' or noreply.
+%%
+%% We use undefined as the From for all but the last request
+%% in order to discards acknowledgements from those requests.
+%%
+io_requests([R|Rs], {noreply,Buf}, From, Drv) ->
+ ReqFrom = if Rs =:= [] -> From; true -> undefined end,
+ io_requests(Rs, io_request(R, Drv, ReqFrom, Buf), From, Drv);
+io_requests([R|Rs], {ok,ok,Buf}, From, Drv) ->
+ ReqFrom = if Rs =:= [] -> From; true -> undefined end,
+ io_requests(Rs, io_request(R, Drv, ReqFrom, Buf), From, Drv);
+io_requests([_|_], Error, _From, _Drv) ->
Error;
-io_requests([], Stat, _) ->
+io_requests([], Stat, _From, _) ->
Stat.
%% io_reply(From, ReplyAs, Reply)
%% The function for sending i/o command acknowledgement.
%% The ACK contains the return value.
+io_reply(undefined, _ReplyAs, _Reply) ->
+ %% Ignore these replies as they are generated from io_requests/4.
+ ok;
io_reply(From, ReplyAs, Reply) ->
From ! {io_reply,ReplyAs,Reply},
ok.
@@ -619,6 +645,10 @@ more_data(What, Cont0, Drv, Ls, Encoding) ->
io_request(Req, From, ReplyAs, Drv, []), %WRONG!!!
send_drv_reqs(Drv, edlin:redraw_line(Cont)),
get_line1({more_chars,Cont,[]}, Drv, Ls, Encoding);
+ {reply,{{From,ReplyAs},Reply}} ->
+ %% We take care of replies from puts here as well
+ io_reply(From, ReplyAs, Reply),
+ more_data(What, Cont0, Drv, Ls, Encoding);
{'EXIT',Drv,interrupt} ->
interrupted;
{'EXIT',Drv,_} ->
@@ -641,6 +671,10 @@ get_line_echo_off1({Chars,[]}, Drv) ->
{io_request,From,ReplyAs,Req} when is_pid(From) ->
io_request(Req, From, ReplyAs, Drv, []),
get_line_echo_off1({Chars,[]}, Drv);
+ {reply,{{From,ReplyAs},Reply}} when From =/= undefined ->
+ %% We take care of replies from puts here as well
+ io_reply(From, ReplyAs, Reply),
+ get_line_echo_off1({Chars,[]},Drv);
{'EXIT',Drv,interrupt} ->
interrupted;
{'EXIT',Drv,_} ->
@@ -790,6 +824,10 @@ get_password1({Chars,[]}, Drv) ->
%% set to []. But do we expect anything but plain output?
get_password1({Chars, []}, Drv);
+ {reply,{{From,ReplyAs},Reply}} ->
+ %% We take care of replies from puts here as well
+ io_reply(From, ReplyAs, Reply),
+ get_password1({Chars, []},Drv);
{'EXIT',Drv,interrupt} ->
interrupted;
{'EXIT',Drv,_} ->
diff --git a/lib/kernel/src/user_drv.erl b/lib/kernel/src/user_drv.erl
index a91c23539d..e6ce85c379 100644
--- a/lib/kernel/src/user_drv.erl
+++ b/lib/kernel/src/user_drv.erl
@@ -29,6 +29,7 @@
-define(OP_INSC,2).
-define(OP_DELC,3).
-define(OP_BEEP,4).
+-define(OP_PUTC_SYNC,5).
% Control op
-define(CTRL_OP_GET_WINSIZE,100).
-define(CTRL_OP_GET_UNICODE_STATE,101).
@@ -133,7 +134,7 @@ server1(Iport, Oport, Shell) ->
[erlang:system_info(system_version)]))},
Iport, Oport),
%% Enter the server loop.
- server_loop(Iport, Oport, Curr, User, Gr).
+ server_loop(Iport, Oport, Curr, User, Gr, queue:new()).
rem_sh_opts(Node) ->
[{expand_fun,fun(B)-> rpc:call(Node,edlin_expand,expand,[B]) end}].
@@ -158,42 +159,41 @@ start_user() ->
User
end.
-server_loop(Iport, Oport, User, Gr) ->
+server_loop(Iport, Oport, User, Gr, IOQueue) ->
Curr = gr_cur_pid(Gr),
put(current_group, Curr),
- server_loop(Iport, Oport, Curr, User, Gr).
+ server_loop(Iport, Oport, Curr, User, Gr, IOQueue).
-server_loop(Iport, Oport, Curr, User, Gr) ->
+server_loop(Iport, Oport, Curr, User, Gr, IOQueue) ->
receive
{Iport,{data,Bs}} ->
BsBin = list_to_binary(Bs),
Unicode = unicode:characters_to_list(BsBin,utf8),
- port_bytes(Unicode, Iport, Oport, Curr, User, Gr);
+ port_bytes(Unicode, Iport, Oport, Curr, User, Gr, IOQueue);
{Iport,eof} ->
Curr ! {self(),eof},
- server_loop(Iport, Oport, Curr, User, Gr);
- {User,Req} -> % never block from user!
- io_request(Req, Iport, Oport),
- server_loop(Iport, Oport, Curr, User, Gr);
- {Curr,tty_geometry} ->
- Curr ! {self(),tty_geometry,get_tty_geometry(Iport)},
- server_loop(Iport, Oport, Curr, User, Gr);
- {Curr,get_unicode_state} ->
- Curr ! {self(),get_unicode_state,get_unicode_state(Iport)},
- server_loop(Iport, Oport, Curr, User, Gr);
- {Curr,set_unicode_state, Bool} ->
- Curr ! {self(),set_unicode_state,set_unicode_state(Iport,Bool)},
- server_loop(Iport, Oport, Curr, User, Gr);
- {Curr,Req} ->
- io_request(Req, Iport, Oport),
- server_loop(Iport, Oport, Curr, User, Gr);
+ server_loop(Iport, Oport, Curr, User, Gr, IOQueue);
+ Req when element(1,Req) =:= User orelse element(1,Req) =:= Curr,
+ tuple_size(Req) =:= 2 orelse tuple_size(Req) =:= 3 ->
+ %% We match {User|Curr,_}|{User|Curr,_,_}
+ NewQ = handle_req(Req, Iport, Oport, IOQueue),
+ server_loop(Iport, Oport, Curr, User, Gr, NewQ);
+ {Oport,ok} ->
+ %% We get this ok from the port, in io_request we store
+ %% info about where to send reply at head of queue
+ {{value,{Origin,Reply}},ReplyQ} = queue:out(IOQueue),
+ Origin ! {reply,Reply},
+ NewQ = handle_req(next, Iport, Oport, ReplyQ),
+ server_loop(Iport, Oport, Curr, User, Gr, NewQ);
{'EXIT',Iport,_R} ->
- server_loop(Iport, Oport, Curr, User, Gr);
+ server_loop(Iport, Oport, Curr, User, Gr, IOQueue);
{'EXIT',Oport,_R} ->
- server_loop(Iport, Oport, Curr, User, Gr);
+ server_loop(Iport, Oport, Curr, User, Gr, IOQueue);
+ {'EXIT',User,shutdown} -> % force data to port
+ server_loop(Iport, Oport, Curr, User, Gr, IOQueue);
{'EXIT',User,_R} -> % keep 'user' alive
NewU = start_user(),
- server_loop(Iport, Oport, Curr, NewU, gr_set_num(Gr, 1, NewU, {}));
+ server_loop(Iport, Oport, Curr, NewU, gr_set_num(Gr, 1, NewU, {}), IOQueue);
{'EXIT',Pid,R} -> % shell and group leader exit
case gr_cur_pid(Gr) of
Pid when R =/= die ,
@@ -213,18 +213,51 @@ server_loop(Iport, Oport, Curr, User, Gr) ->
{ok,Gr2} = gr_set_cur(gr_set_num(Gr1, Ix, Pid1,
{shell,start,Params}), Ix),
put(current_group, Pid1),
- server_loop(Iport, Oport, Pid1, User, Gr2);
+ server_loop(Iport, Oport, Pid1, User, Gr2, IOQueue);
_ -> % remote shell
io_requests([{put_chars,unicode,"(^G to start new job) ***\n"}],
Iport, Oport),
- server_loop(Iport, Oport, Curr, User, Gr1)
+ server_loop(Iport, Oport, Curr, User, Gr1, IOQueue)
end;
_ -> % not current, just remove it
- server_loop(Iport, Oport, Curr, User, gr_del_pid(Gr, Pid))
+ server_loop(Iport, Oport, Curr, User, gr_del_pid(Gr, Pid), IOQueue)
end;
_X ->
%% Ignore unknown messages.
- server_loop(Iport, Oport, Curr, User, Gr)
+ server_loop(Iport, Oport, Curr, User, Gr, IOQueue)
+ end.
+
+%% We always handle geometry and unicode requests
+handle_req({Curr,tty_geometry},Iport,_Oport,IOQueue) ->
+ Curr ! {self(),tty_geometry,get_tty_geometry(Iport)},
+ IOQueue;
+handle_req({Curr,get_unicode_state},Iport,_Oport,IOQueue) ->
+ Curr ! {self(),get_unicode_state,get_unicode_state(Iport)},
+ IOQueue;
+handle_req({Curr,set_unicode_state, Bool},Iport,_Oport,IOQueue) ->
+ Curr ! {self(),set_unicode_state,set_unicode_state(Iport,Bool)},
+ IOQueue;
+handle_req(next,Iport,Oport,IOQueue) ->
+ case queue:out(IOQueue) of
+ {{value,Next},ExecQ} ->
+ NewQ = handle_req(Next,Iport,Oport,queue:new()),
+ queue:join(NewQ,ExecQ);
+ {empty,_} ->
+ IOQueue
+ end;
+handle_req(Msg,Iport,Oport,IOQueue) ->
+ case queue:peek(IOQueue) of
+ empty ->
+ {Origin,Req} = Msg,
+ case io_request(Req, Iport, Oport) of
+ ok -> IOQueue;
+ Reply ->
+ %% Push reply info to front of queue
+ queue:in_r({Origin,Reply},IOQueue)
+ end;
+ _Else ->
+ %% All requests are queued when we have outstanding sync put_chars
+ queue:in(Msg,IOQueue)
end.
%% port_bytes(Bytes, InPort, OutPort, CurrentProcess, UserProcess, Group)
@@ -232,34 +265,34 @@ server_loop(Iport, Oport, Curr, User, Gr) ->
%% either escape to switch_loop or restart the shell. Otherwise send
%% the bytes to Curr.
-port_bytes([$\^G|_Bs], Iport, Oport, _Curr, User, Gr) ->
- handle_escape(Iport, Oport, User, Gr);
+port_bytes([$\^G|_Bs], Iport, Oport, _Curr, User, Gr, IOQueue) ->
+ handle_escape(Iport, Oport, User, Gr, IOQueue);
-port_bytes([$\^C|_Bs], Iport, Oport, Curr, User, Gr) ->
- interrupt_shell(Iport, Oport, Curr, User, Gr);
+port_bytes([$\^C|_Bs], Iport, Oport, Curr, User, Gr, IOQueue) ->
+ interrupt_shell(Iport, Oport, Curr, User, Gr, IOQueue);
-port_bytes([B], Iport, Oport, Curr, User, Gr) ->
+port_bytes([B], Iport, Oport, Curr, User, Gr, IOQueue) ->
Curr ! {self(),{data,[B]}},
- server_loop(Iport, Oport, Curr, User, Gr);
-port_bytes(Bs, Iport, Oport, Curr, User, Gr) ->
+ server_loop(Iport, Oport, Curr, User, Gr, IOQueue);
+port_bytes(Bs, Iport, Oport, Curr, User, Gr, IOQueue) ->
case member($\^G, Bs) of
true ->
- handle_escape(Iport, Oport, User, Gr);
+ handle_escape(Iport, Oport, User, Gr, IOQueue);
false ->
Curr ! {self(),{data,Bs}},
- server_loop(Iport, Oport, Curr, User, Gr)
+ server_loop(Iport, Oport, Curr, User, Gr, IOQueue)
end.
-interrupt_shell(Iport, Oport, Curr, User, Gr) ->
+interrupt_shell(Iport, Oport, Curr, User, Gr, IOQueue) ->
case gr_get_info(Gr, Curr) of
undefined ->
ok; % unknown
_ ->
exit(Curr, interrupt)
end,
- server_loop(Iport, Oport, Curr, User, Gr).
+ server_loop(Iport, Oport, Curr, User, Gr, IOQueue).
-handle_escape(Iport, Oport, User, Gr) ->
+handle_escape(Iport, Oport, User, Gr, IOQueue) ->
case application:get_env(stdlib, shell_esc) of
{ok,abort} ->
Pid = gr_cur_pid(Gr),
@@ -278,11 +311,11 @@ handle_escape(Iport, Oport, User, Gr) ->
Pid1 = group:start(self(), {shell,start,[]}),
io_request({put_chars,unicode,"\n"}, Iport, Oport),
server_loop(Iport, Oport, User,
- gr_add_cur(Gr1, Pid1, {shell,start,[]}));
+ gr_add_cur(Gr1, Pid1, {shell,start,[]}), IOQueue);
_ -> % {ok,jcl} | undefined
io_request({put_chars,unicode,"\nUser switch command\n"}, Iport, Oport),
- server_loop(Iport, Oport, User, switch_loop(Iport, Oport, Gr))
+ server_loop(Iport, Oport, User, switch_loop(Iport, Oport, Gr), IOQueue)
end.
switch_loop(Iport, Oport, Gr) ->
@@ -492,9 +525,12 @@ set_unicode_state(Iport, Bool) ->
io_request(Request, Iport, Oport) ->
try io_command(Request) of
- Command ->
+ {command,_} = Command ->
Oport ! {self(),Command},
- ok
+ ok;
+ {Command,Reply} ->
+ Oport ! {self(),Command},
+ Reply
catch
{requests,Rs} ->
io_requests(Rs, Iport, Oport);
@@ -511,6 +547,13 @@ io_requests([], _Iport, _Oport) ->
put_int16(N, Tail) ->
[(N bsr 8)band 255,N band 255|Tail].
+%% When a put_chars_sync command is used, user_drv guarantees that
+%% the bytes have been put in the buffer of the port before an acknowledgement
+%% is sent back to the process sending the request. This command was added in
+%% OTP 18 to make sure that data sent from io:format is actually printed
+%% to the console before the vm stops when calling erlang:halt(integer()).
+io_command({put_chars_sync, unicode,Cs,Reply}) ->
+ {{command,[?OP_PUTC_SYNC|unicode:characters_to_binary(Cs,utf8)]},Reply};
io_command({put_chars, unicode,Cs}) ->
{command,[?OP_PUTC|unicode:characters_to_binary(Cs,utf8)]};
io_command({move_rel,N}) ->
diff --git a/lib/ssh/src/ssh_cli.erl b/lib/ssh/src/ssh_cli.erl
index 18841e3d2d..de6d246403 100644
--- a/lib/ssh/src/ssh_cli.erl
+++ b/lib/ssh/src/ssh_cli.erl
@@ -98,7 +98,7 @@ handle_ssh_msg({ssh_cm, ConnectionHandler,
Pty = Pty0#ssh_pty{width = Width, height = Height,
pixel_width = PixWidth,
pixel_height = PixHeight},
- {Chars, NewBuf} = io_request({window_change, Pty0}, Buf, Pty),
+ {Chars, NewBuf} = io_request({window_change, Pty0}, Buf, Pty, undefined),
write_chars(ConnectionHandler, ChannelId, Chars),
{ok, State#state{pty = Pty, buf = NewBuf}};
@@ -188,7 +188,7 @@ handle_msg({Group, tty_geometry}, #state{group = Group,
handle_msg({Group, Req}, #state{group = Group, buf = Buf, pty = Pty,
cm = ConnectionHandler,
channel = ChannelId} = State) ->
- {Chars, NewBuf} = io_request(Req, Buf, Pty),
+ {Chars, NewBuf} = io_request(Req, Buf, Pty, Group),
write_chars(ConnectionHandler, ChannelId, Chars),
{ok, State#state{buf = NewBuf}};
@@ -263,40 +263,49 @@ eval(Error) ->
%%% displaying device...
%%% We are *not* really unicode aware yet, we just filter away characters
%%% beyond the latin1 range. We however handle the unicode binaries...
-io_request({window_change, OldTty}, Buf, Tty) ->
+io_request({window_change, OldTty}, Buf, Tty, _Group) ->
window_change(Tty, OldTty, Buf);
-io_request({put_chars, Cs}, Buf, Tty) ->
+io_request({put_chars, Cs}, Buf, Tty, _Group) ->
put_chars(bin_to_list(Cs), Buf, Tty);
-io_request({put_chars, unicode, Cs}, Buf, Tty) ->
+io_request({put_chars, unicode, Cs}, Buf, Tty, _Group) ->
put_chars(unicode:characters_to_list(Cs,unicode), Buf, Tty);
-io_request({insert_chars, Cs}, Buf, Tty) ->
+io_request({insert_chars, Cs}, Buf, Tty, _Group) ->
insert_chars(bin_to_list(Cs), Buf, Tty);
-io_request({insert_chars, unicode, Cs}, Buf, Tty) ->
+io_request({insert_chars, unicode, Cs}, Buf, Tty, _Group) ->
insert_chars(unicode:characters_to_list(Cs,unicode), Buf, Tty);
-io_request({move_rel, N}, Buf, Tty) ->
+io_request({move_rel, N}, Buf, Tty, _Group) ->
move_rel(N, Buf, Tty);
-io_request({delete_chars,N}, Buf, Tty) ->
+io_request({delete_chars,N}, Buf, Tty, _Group) ->
delete_chars(N, Buf, Tty);
-io_request(beep, Buf, _Tty) ->
+io_request(beep, Buf, _Tty, _Group) ->
{[7], Buf};
%% New in R12
-io_request({get_geometry,columns},Buf,Tty) ->
+io_request({get_geometry,columns},Buf,Tty, _Group) ->
{ok, Tty#ssh_pty.width, Buf};
-io_request({get_geometry,rows},Buf,Tty) ->
+io_request({get_geometry,rows},Buf,Tty, _Group) ->
{ok, Tty#ssh_pty.height, Buf};
-io_request({requests,Rs}, Buf, Tty) ->
- io_requests(Rs, Buf, Tty, []);
-io_request(tty_geometry, Buf, Tty) ->
- io_requests([{move_rel, 0}, {put_chars, unicode, [10]}], Buf, Tty, []);
+io_request({requests,Rs}, Buf, Tty, Group) ->
+ io_requests(Rs, Buf, Tty, [], Group);
+io_request(tty_geometry, Buf, Tty, Group) ->
+ io_requests([{move_rel, 0}, {put_chars, unicode, [10]}],
+ Buf, Tty, [], Group);
%{[], Buf};
-io_request(_R, Buf, _Tty) ->
+
+%% New in 18
+io_request({put_chars_sync, Class, Cs, Reply}, Buf, Tty, Group) ->
+ %% We handle these asynchronous for now, if we need output guarantees
+ %% we have to handle these synchronously
+ Group ! {reply, Reply},
+ io_request({put_chars, Class, Cs}, Buf, Tty, Group);
+
+io_request(_R, Buf, _Tty, _Group) ->
{[], Buf}.
-io_requests([R|Rs], Buf, Tty, Acc) ->
- {Chars, NewBuf} = io_request(R, Buf, Tty),
- io_requests(Rs, NewBuf, Tty, [Acc|Chars]);
-io_requests([], Buf, _Tty, Acc) ->
+io_requests([R|Rs], Buf, Tty, Acc, Group) ->
+ {Chars, NewBuf} = io_request(R, Buf, Tty, Group),
+ io_requests(Rs, NewBuf, Tty, [Acc|Chars], Group);
+io_requests([], Buf, _Tty, Acc, _Group) ->
{Acc, Buf}.
%%% return commands for cursor navigation, assume everything is ansi