static int open_pty_slave(char *name)
{
int sfd;
struct termios tty_rmode;
if ((sfd = sf_open(name, O_RDWR, 0)) < 0) {
return -1;
}
#if defined(__sun) && defined(__SVR4)
/* Load the necessary STREAMS modules for Solaris */
if ((ioctl(sfd, I_FIND, "ldterm")) < 0) {
ERROR0(LOG_ERR, "Failed to find ldterm STREAMS module");
return -1;
}
if (ioctl(sfd, I_PUSH, "ptem") < 0) {
ERROR0(LOG_ERR, "Failed to push ptem STREAMS module");
return -1;
}
if (ioctl(sfd, I_PUSH, "ldterm") < 0) {
ERROR0(LOG_ERR, "Failed to push ldterm STREAMS module");
return -1;
}
if (ioctl(sfd, I_PUSH, "ttcompat") < 0) {
ERROR0(LOG_ERR, "Failed to push ttcompat STREAMS module");
return -1;
}
#endif
if (getenv("RUN_ERL_DISABLE_FLOWCNTRL")) {
if (tcgetattr(sfd, &tty_rmode) < 0) {
fprintf(stderr, "Cannot get terminal's current mode\n");
exit(-1);
}
tty_rmode.c_iflag &= ~IXOFF;
if (tcsetattr(sfd, TCSANOW, &tty_rmode) < 0) {
fprintf(stderr, "Cannot disable terminal's flow control on input\n");
exit(-1);
}
tty_rmode.c_iflag &= ~IXON;
if (tcsetattr(sfd, TCSANOW, &tty_rmode) < 0) {
fprintf(stderr, "Cannot disable terminal's flow control on output\n");
exit(-1);
}
}
#ifdef DEBUG
if (tcgetattr(sfd, &tty_rmode) < 0) {
fprintf(stderr, "Cannot get terminals current mode\n");
exit(-1);
}
show_terminal_settings(&tty_rmode);
#endif
return sfd;
}
static int open_pty_master(char **ptyslave, int *sfdp)
{
int mfd;
/* Use the posix_openpt if working, as this guarantees creation of the
slave device properly. */
#if defined(HAVE_WORKING_POSIX_OPENPT) || (defined(__sun) && defined(__SVR4))
# ifdef HAVE_WORKING_POSIX_OPENPT
if ((mfd = posix_openpt(O_RDWR)) >= 0) {
# elif defined(__sun) && defined(__SVR4)
mfd = sf_open("/dev/ptmx", O_RDWR, 0);
if (mfd >= 0) {
# endif
if ((*ptyslave = ptsname(mfd)) != NULL &&
grantpt(mfd) == 0 &&
unlockpt(mfd) == 0) {
return mfd;
}
sf_close(mfd);
}
/* fallback to openpty if it exist */
#endif
#if defined(HAVE_OPENPTY)
# ifdef PATH_MAX
# define SLAVE_SIZE PATH_MAX
# else
# define SLAVE_SIZE 1024
# endif
{
static char slave[SLAVE_SIZE];
# undef SLAVE_SIZE
if (openpty(&mfd, sfdp, slave, NULL, NULL) == 0) {
*ptyslave = slave;
return mfd;
}
}
#elif !defined(HAVE_WORKING_POSIX_OPENPT)
/*
* The traditional way to find ptys. We only try it if neither
* posix_openpt or openpty() are available.
*/
char *major, *minor;
static char majorchars[] = "pqrstuvwxyzabcdePQRSTUVWXYZABCDE";
static char minorchars[] = "0123456789abcdefghijklmnopqrstuv"
"wxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_+";
/* In the old time the names where /dex/ptyXY where */
/* X is in "pqrs" and Y in "0123456789abcdef" but FreeBSD */
/* and some Linux version has extended this. */
/* This code could probebly be improved alot. For example look at */
/* http://www.xcf.berkeley.edu/~ali/K0D/UNIX/PTY/code/pty.c.html */
/* http://www.xcf.berkeley.edu/~ali/K0D/UNIX/PTY/code/upty.h.html */
{
/* New style devpts or devfs /dev/pty/{m,s}{0,1....} */
static char ptyname[] = "/dev/pty/mX";
for (minor = minorchars; *minor; minor++) {
ptyname[10] = *minor;
if ((mfd = sf_open(ptyname, O_RDWR, 0)) >= 0) {
ptyname[9] = 's';
*ptyslave = ptyname;
return mfd;
}
}
}
{
/* Unix98 style /dev/ptym/ptyXY and /dev/pty/ttyXY */
static char ptyname[] = "/dev/ptym/ptyXY";
static char ttyname[] = "/dev/pty/ttyXY";
for (major = majorchars; *major; major++) {
ptyname[13] = *major;
for (minor = minorchars; *minor; minor++) {
ptyname[14] = *minor;
if ((mfd = sf_open(ptyname, O_RDWR, 0)) >= 0) {
ttyname[12] = *major;
ttyname[13] = *minor;
*ptyslave = ttyname;
return mfd;
}
}
}
}
{
/* Old style /dev/ptyXY */
static char ptyname[] = "/dev/ptyXY";
for (major = majorchars; *major; major++) {
ptyname[8] = *major;
for (minor = minorchars; *minor; minor++) {
ptyname[9] = *minor;
if ((mfd = sf_open(ptyname, O_RDWR, 0)) >= 0) {
ptyname[5] = 't';
*ptyslave = ptyname;
return mfd;
}
}
}
}
#endif /* !HAVE_OPENPTY */
return -1;
}
static int open_pty_slave(char *name)
{
int sfd;
struct termios tty_rmode;
if ((sfd = sf_open(name, O_RDWR, 0)) < 0) {
return -1;
}
#if defined(__sun) && defined(__SVR4)
/* Load the necessary STREAMS modules for Solaris */
if ((ioctl(sfd, I_FIND, "ldterm")) < 0) {
ERROR0(LOG_ERR, "Failed to find ldterm STREAMS module");
return -1;
}
if (ioctl(sfd, I_PUSH, "ptem") < 0) {
ERROR0(LOG_ERR, "Failed to push ptem STREAMS module");
return -1;
}
if (ioctl(sfd, I_PUSH, "ldterm") < 0) {
ERROR0(LOG_ERR, "Failed to push ldterm STREAMS module");
return -1;
}
if (ioctl(sfd, I_PUSH, "ttcompat") < 0) {
ERROR0(LOG_ERR, "Failed to push ttcompat STREAMS module");
return -1;
}
#endif
if (getenv("RUN_ERL_DISABLE_FLOWCNTRL")) {
if (tcgetattr(sfd, &tty_rmode) < 0) {
fprintf(stderr, "Cannot get terminal's current mode\n");
exit(-1);
}
tty_rmode.c_iflag &= ~IXOFF;
if (tcsetattr(sfd, TCSANOW, &tty_rmode) < 0) {
fprintf(stderr, "Cannot disable terminal's flow control on input\n");
exit(-1);
}
tty_rmode.c_iflag &= ~IXON;
if (tcsetattr(sfd, TCSANOW, &tty_rmode) < 0) {
fprintf(stderr, "Cannot disable terminal's flow control on output\n");
exit(-1);
}
}
#ifdef DEBUG
if (tcgetattr(sfd, &tty_rmode) < 0) {
fprintf(stderr, "Cannot get terminals current mode\n");
exit(-1);
}
show_terminal_settings(&tty_rmode);
#endif
return sfd;
}
int main(int argc, char **argv)
{
char FIFO1[FILENAME_MAX], FIFO2[FILENAME_MAX];
int i, len, wfd, rfd;
fd_set readfds;
char buf[BUFSIZ];
char pipename[FILENAME_MAX];
int pipeIx = 1;
int force_lock = 0;
int got_some = 0;
if (argc >= 2 && argv[1][0]=='-') {
switch (argv[1][1]) {
case 'h':
usage(argv[0]);
exit(1);
case 'F':
force_lock = 1;
break;
default:
fprintf(stderr,"Invalid option '%s'\n",argv[1]);
exit(1);
}
pipeIx = 2;
}
#ifdef DEBUG
fprintf(stderr, "%s: pid is : %d\n", argv[0], (int)getpid());
#endif
strn_cpy(pipename, sizeof(pipename),
(argv[pipeIx] ? argv[pipeIx] : PIPE_DIR));
if(*pipename && pipename[strlen(pipename)-1] == '/') {
/* The user wishes us to find a pipe name in the specified */
/* directory */
int highest_pipe_num = 0;
DIR *dirp;
struct dirent *direntp;
dirp = opendir(pipename);
if(!dirp) {
fprintf(stderr, "Can't access pipe directory %s: %s\n", pipename, strerror(errno));
exit(1);
}
/* Check the directory for existing pipes */
while((direntp=readdir(dirp)) != NULL) {
if(strncmp(direntp->d_name,PIPE_STUBNAME,PIPE_STUBLEN)==0) {
int num = atoi(direntp->d_name+PIPE_STUBLEN+1);
if(num > highest_pipe_num)
highest_pipe_num = num;
}
}
closedir(dirp);
strn_catf(pipename, sizeof(pipename), (highest_pipe_num?"%s.%d":"%s"),
PIPE_STUBNAME, highest_pipe_num);
} /* if */
/* read FIFO */
sn_printf(FIFO1,sizeof(FIFO1),"%s.r",pipename);
/* write FIFO */
sn_printf(FIFO2,sizeof(FIFO2),"%s.w",pipename);
/* Check that nobody is running to_erl on this pipe already */
if ((wfd = open (FIFO1, O_WRONLY|DONT_BLOCK_PLEASE, 0)) >= 0) {
/* Open as server succeeded -- to_erl is already running! */
close(wfd);
fprintf(stderr, "Another to_erl process already attached to pipe "
"%s.\n", pipename);
if (force_lock) {
fprintf(stderr, "But we proceed anyway by force (-F).\n");
}
else {
exit(1);
}
}
if ((rfd = open (FIFO1, O_RDONLY|DONT_BLOCK_PLEASE, 0)) < 0) {
#ifdef DEBUG
fprintf(stderr, "Could not open FIFO %s for reading.\n", FIFO1);
#endif
fprintf(stderr, "No running Erlang on pipe %s: %s\n", pipename, strerror(errno));
exit(1);
}
#ifdef DEBUG
fprintf(stderr, "to_erl: %s opened for reading\n", FIFO1);
#endif
if ((wfd = open (FIFO2, O_WRONLY|DONT_BLOCK_PLEASE, 0)) < 0) {
#ifdef DEBUG
fprintf(stderr, "Could not open FIFO %s for writing.\n", FIFO2);
#endif
fprintf(stderr, "No running Erlang on pipe %s: %s\n", pipename, strerror(errno));
close(rfd);
exit(1);
}
#ifdef DEBUG
fprintf(stderr, "to_erl: %s opened for writing\n", FIFO2);
#endif
fprintf(stderr, "Attaching to %s (^D to exit)\n\n", pipename);
/* Set break handler to our handler */
signal(SIGINT,handle_ctrlc);
/*
* Save the current state of the terminal, and set raw mode.
*/
if (tcgetattr(0, &tty_rmode) , 0) {
fprintf(stderr, "Cannot get terminals current mode\n");
exit(-1);
}
tty_smode = tty_rmode;
tty_eof = '\004'; /* Ctrl+D to exit */
#ifdef DEBUG
show_terminal_settings(&tty_rmode);
#endif
tty_smode.c_iflag =
1*BRKINT |/*Signal interrupt on break.*/
1*IGNPAR |/*Ignore characters with parity errors.*/
1*ISTRIP |/*Strip character.*/
0;
#if 0
0*IGNBRK |/*Ignore break condition.*/
0*PARMRK |/*Mark parity errors.*/
0*INPCK |/*Enable input parity check.*/
0*INLCR |/*Map NL to CR on input.*/
0*IGNCR |/*Ignore CR.*/
0*ICRNL |/*Map CR to NL on input.*/
0*IUCLC |/*Map upper-case to lower-case on input.*/
0*IXON |/*Enable start/stop output control.*/
0*IXANY |/*Enable any character to restart output.*/
0*IXOFF |/*Enable start/stop input control.*/
0*IMAXBEL|/*Echo BEL on input line too long.*/
#endif
tty_smode.c_oflag =
1*OPOST |/*Post-process output.*/
1*ONLCR |/*Map NL to CR-NL on output.*/
#ifdef XTABS
1*XTABS |/*Expand tabs to spaces. (Linux)*/
#endif
#ifdef OXTABS
1*OXTABS |/*Expand tabs to spaces. (FreeBSD)*/
#endif
#ifdef NL0
1*NL0 |/*Select newline delays*/
#endif
#ifdef CR0
1*CR0 |/*Select carriage-return delays*/
#endif
#ifdef TAB0
1*TAB0 |/*Select horizontal tab delays*/
#endif
#ifdef BS0
1*BS0 |/*Select backspace delays*/
#endif
#ifdef VT0
1*VT0 |/*Select vertical tab delays*/
#endif
#ifdef FF0
1*FF0 |/*Select form feed delays*/
#endif
0;
#if 0
0*OLCUC |/*Map lower case to upper on output.*/
0*OCRNL |/*Map CR to NL on output.*/
0*ONOCR |/*No CR output at column 0.*/
0*ONLRET |/*NL performs CR function.*/
0*OFILL |/*Use fill characters for delay.*/
0*OFDEL |/*Fill is DEL, else NULL.*/
0*NL1 |
0*CR1 |
0*CR2 |
0*CR3 |
0*TAB1 |
0*TAB2 |
0*TAB3 |/*Expand tabs to spaces.*/
0*BS1 |
0*VT1 |
0*FF1 |
#endif
/* JALI: removed setting the tty_smode.c_cflag flags, since this is not */
/* advisable if this is a *real* terminal, such as the console. In fact */
/* this may hang the entire machine, deep, deep down (signalling break */
/* or toggling the abort switch doesn't help) */
tty_smode.c_lflag =
0;
#if 0
0*ISIG |/*Enable signals.*/
0*ICANON |/*Canonical input (erase and kill processing).*/
0*XCASE |/*Canonical upper/lower presentation.*/
0*ECHO |/*Enable echo.*/
0*ECHOE |/*Echo erase character as BS-SP-BS.*/
0*ECHOK |/*Echo NL after kill character.*/
0*ECHONL |/*Echo NL.*/
0*NOFLSH |/*Disable flush after interrupt or quit.*/
0*TOSTOP |/*Send SIGTTOU for background output.*/
0*ECHOCTL|/*Echo control characters as ^char, delete as ^?.*/
0*ECHOPRT|/*Echo erase character as character erased.*/
0*ECHOKE |/*BS-SP-BS erase entire line on line kill.*/
0*FLUSHO |/*Output is being flushed.*/
0*PENDIN |/*Retype pending input at next read or input character.*/
0*IEXTEN |/*Enable extended (implementation-defined) functions.*/
#endif
tty_smode.c_cc[VMIN] =0;/* Note that VMIN is the same as VEOF! */
tty_smode.c_cc[VTIME] =0;/* Note that VTIME is the same as VEOL! */
tty_smode.c_cc[VINTR] =3;
tcsetattr(0, TCSANOW, &tty_smode);
#ifdef DEBUG
show_terminal_settings(&tty_smode);
#endif
/*
* "Write a ^R to the FIFO which causes the other end to redisplay
* the input line."
* This does not seem to work as was intended in old comment above.
* However, this control character is now (R12B-3) used by run_erl
* to trigger the version handshaking between to_erl and run_erl
* at the start of every new to_erl-session.
*/
if (write(wfd, "\014", 1) < 0) {
fprintf(stderr, "Error in writing ^R to FIFO.\n");
}
/*
* read and write
*/
while (1) {
FD_ZERO(&readfds);
FD_SET(0, &readfds);
FD_SET(rfd, &readfds);
if (select(rfd + 1, &readfds, NULL, NULL, NULL) < 0) {
if (recv_sig) {
FD_ZERO(&readfds);
}
else {
fprintf(stderr, "Error in select.\n");
break;
}
}
len = 0;
/*
* Read from terminal and write to FIFO
*/
if (recv_sig) {
switch (recv_sig) {
case SIGINT:
fprintf(stderr, "[Break]\n\r");
buf[0] = '\003';
len = 1;
break;
case SIGWINCH:
len = window_size_seq(buf,sizeof(buf));
break;
default:
fprintf(stderr,"Unexpected signal: %u\n",recv_sig);
}
recv_sig = 0;
}
else if (FD_ISSET(0, &readfds)) {
len = read(0, buf, sizeof(buf));
if (len <= 0) {
close(rfd);
close(wfd);
if (len < 0) {
fprintf(stderr, "Error in reading from stdin.\n");
} else {
fprintf(stderr, "[EOF]\n\r");
}
break;
}
/* check if there is an eof character in input */
for (i = 0; i < len && buf[i] != tty_eof; i++);
if (buf[i] == tty_eof) {
fprintf(stderr, "[Quit]\n\r");
break;
}
}
if (len) {
#ifdef DEBUG
if(write(1, buf, len));
#endif
if (write_all(wfd, buf, len) != len) {
fprintf(stderr, "Error in writing to FIFO.\n");
close(rfd);
close(wfd);
break;
}
STATUS("\" OK\r\n");
}
/*
* Read from FIFO, write to terminal.
*/
if (FD_ISSET(rfd, &readfds)) {
STATUS("FIFO read: ");
len = read(rfd, buf, BUFSIZ);
if (len < 0 && errno == EAGAIN) {
/*
* No data this time, but the writing end of the FIFO is still open.
* Do nothing.
*/
;
} else if (len <= 0) {
/*
* Either an error or end of file. In either case, break out
* of the loop.
*/
close(rfd);
close(wfd);
if (len < 0) {
fprintf(stderr, "Error in reading from FIFO.\n");
} else
fprintf(stderr, "[End]\n\r");
break;
} else {
if (!got_some) {
if ((len=version_handshake(buf,len,wfd)) < 0) {
close(rfd);
close(wfd);
break;
}
if (protocol_ver >= 1) {
/* Tell run_erl size of terminal window */
signal(SIGWINCH, handle_sigwinch);
raise(SIGWINCH);
}
got_some = 1;
}
/*
* We successfully read at least one character. Write what we got.
*/
STATUS("Terminal write: \"");
if (write_all(1, buf, len) != len) {
fprintf(stderr, "Error in writing to terminal.\n");
close(rfd);
close(wfd);
break;
}
STATUS("\" OK\r\n");
}
}
}
/*
* Reset terminal characterstics
* XXX
*/
tcsetattr(0, TCSANOW, &tty_rmode);
return 0;
}
int to_erl(int argc, char **argv)
{
char FIFO1[FILENAME_MAX], FIFO2[FILENAME_MAX];
int i, len, wfd, rfd;
char pipename[FILENAME_MAX];
int pipeIx = 1;
int force_lock = 0;
int got_some = 0;
#ifdef __OSE__
struct aiocb stdin_read_req, pipe_read_req;
FmHandle stdin_fh, pipe_fh;
char *stdin_buf, *pipe_buf;
char *buf;
union SIGNAL *sig;
#else /* __UNIX__ */
char buf[BUFSIZ];
fd_set readfds;
#endif
if (argc >= 2 && argv[1][0]=='-') {
switch (argv[1][1]) {
case 'h':
usage(argv[0]);
exit(1);
case 'F':
force_lock = 1;
break;
default:
fprintf(stderr,"Invalid option '%s'\n",argv[1]);
exit(1);
}
pipeIx = 2;
}
#ifdef DEBUG
fprintf(stderr, "%s: pid is : %d\n", argv[0],(int)
#ifdef __OSE__
current_process()
#else /* __UNIX__ */
getpid()
#endif
);
#endif
strn_cpy(pipename, sizeof(pipename),
(argv[pipeIx] ? argv[pipeIx] : PIPE_DIR));
if(*pipename && pipename[strlen(pipename)-1] == '/') {
/* The user wishes us to find a pipe name in the specified */
/* directory */
int highest_pipe_num = 0;
DIR *dirp;
struct dirent *direntp;
dirp = opendir(pipename);
if(!dirp) {
fprintf(stderr, "Can't access pipe directory %s: %s\n", pipename, strerror(errno));
exit(1);
}
/* Check the directory for existing pipes */
while((direntp=readdir(dirp)) != NULL) {
if(strncmp(direntp->d_name,PIPE_STUBNAME,PIPE_STUBLEN)==0) {
int num = atoi(direntp->d_name+PIPE_STUBLEN+1);
if(num > highest_pipe_num)
highest_pipe_num = num;
}
}
closedir(dirp);
strn_catf(pipename, sizeof(pipename), (highest_pipe_num?"%s.%d":"%s"),
PIPE_STUBNAME, highest_pipe_num);
} /* if */
/* read FIFO */
sn_printf(FIFO1,sizeof(FIFO1),"%s.r",pipename);
/* write FIFO */
sn_printf(FIFO2,sizeof(FIFO2),"%s.w",pipename);
#ifndef __OSE__
/* Check that nobody is running to_erl on this pipe already */
if ((wfd = open (FIFO1, O_WRONLY|DONT_BLOCK_PLEASE, 0)) >= 0) {
/* Open as server succeeded -- to_erl is already running! */
close(wfd);
fprintf(stderr, "Another to_erl process already attached to pipe "
"%s.\n", pipename);
if (force_lock) {
fprintf(stderr, "But we proceed anyway by force (-F).\n");
}
else {
exit(1);
}
}
#endif
if ((rfd = open (FIFO1, O_RDONLY|DONT_BLOCK_PLEASE, 0)) < 0) {
#ifdef DEBUG
fprintf(stderr, "Could not open FIFO %s for reading.\n", FIFO1);
#endif
fprintf(stderr, "No running Erlang on pipe %s: %s\n", pipename, strerror(errno));
exit(1);
}
#ifdef DEBUG
fprintf(stderr, "to_erl: %s opened for reading\n", FIFO1);
#endif
if ((wfd = open (FIFO2, O_WRONLY|DONT_BLOCK_PLEASE, 0)) < 0) {
#ifdef DEBUG
fprintf(stderr, "Could not open FIFO %s for writing.\n", FIFO2);
#endif
fprintf(stderr, "No running Erlang on pipe %s: %s\n", pipename, strerror(errno));
close(rfd);
exit(1);
}
#ifdef DEBUG
fprintf(stderr, "to_erl: %s opened for writing\n", FIFO2);
#endif
#ifndef __OSE__
fprintf(stderr, "Attaching to %s (^D to exit)\n\n", pipename);
#else
fprintf(stderr, "Attaching to %s (^C to exit)\n\n", pipename);
#endif
#ifndef __OSE__
/* Set break handler to our handler */
signal(SIGINT,handle_ctrlc);
/*
* Save the current state of the terminal, and set raw mode.
*/
if (tcgetattr(0, &tty_rmode) , 0) {
fprintf(stderr, "Cannot get terminals current mode\n");
exit(-1);
}
tty_smode = tty_rmode;
tty_eof = '\004'; /* Ctrl+D to exit */
#ifdef DEBUG
show_terminal_settings(&tty_rmode);
#endif
tty_smode.c_iflag =
1*BRKINT |/*Signal interrupt on break.*/
1*IGNPAR |/*Ignore characters with parity errors.*/
1*ISTRIP |/*Strip character.*/
0;
#if 0
0*IGNBRK |/*Ignore break condition.*/
0*PARMRK |/*Mark parity errors.*/
0*INPCK |/*Enable input parity check.*/
0*INLCR |/*Map NL to CR on input.*/
0*IGNCR |/*Ignore CR.*/
0*ICRNL |/*Map CR to NL on input.*/
0*IUCLC |/*Map upper-case to lower-case on input.*/
0*IXON |/*Enable start/stop output control.*/
0*IXANY |/*Enable any character to restart output.*/
0*IXOFF |/*Enable start/stop input control.*/
0*IMAXBEL|/*Echo BEL on input line too long.*/
#endif
tty_smode.c_oflag =
1*OPOST |/*Post-process output.*/
1*ONLCR |/*Map NL to CR-NL on output.*/
#ifdef XTABS
1*XTABS |/*Expand tabs to spaces. (Linux)*/
#endif
#ifdef OXTABS
1*OXTABS |/*Expand tabs to spaces. (FreeBSD)*/
#endif
#ifdef NL0
1*NL0 |/*Select newline delays*/
#endif
#ifdef CR0
1*CR0 |/*Select carriage-return delays*/
#endif
#ifdef TAB0
1*TAB0 |/*Select horizontal tab delays*/
#endif
#ifdef BS0
1*BS0 |/*Select backspace delays*/
#endif
#ifdef VT0
1*VT0 |/*Select vertical tab delays*/
#endif
#ifdef FF0
1*FF0 |/*Select form feed delays*/
#endif
0;
#if 0
0*OLCUC |/*Map lower case to upper on output.*/
0*OCRNL |/*Map CR to NL on output.*/
0*ONOCR |/*No CR output at column 0.*/
0*ONLRET |/*NL performs CR function.*/
0*OFILL |/*Use fill characters for delay.*/
0*OFDEL |/*Fill is DEL, else NULL.*/
0*NL1 |
0*CR1 |
0*CR2 |
0*CR3 |
0*TAB1 |
0*TAB2 |
0*TAB3 |/*Expand tabs to spaces.*/
0*BS1 |
0*VT1 |
0*FF1 |
#endif
/* JALI: removed setting the tty_smode.c_cflag flags, since this is not */
/* advisable if this is a *real* terminal, such as the console. In fact */
/* this may hang the entire machine, deep, deep down (signalling break */
/* or toggling the abort switch doesn't help) */
tty_smode.c_lflag =
0;
#if 0
0*ISIG |/*Enable signals.*/
0*ICANON |/*Canonical input (erase and kill processing).*/
0*XCASE |/*Canonical upper/lower presentation.*/
0*ECHO |/*Enable echo.*/
0*ECHOE |/*Echo erase character as BS-SP-BS.*/
0*ECHOK |/*Echo NL after kill character.*/
0*ECHONL |/*Echo NL.*/
0*NOFLSH |/*Disable flush after interrupt or quit.*/
0*TOSTOP |/*Send SIGTTOU for background output.*/
0*ECHOCTL|/*Echo control characters as ^char, delete as ^?.*/
0*ECHOPRT|/*Echo erase character as character erased.*/
0*ECHOKE |/*BS-SP-BS erase entire line on line kill.*/
0*FLUSHO |/*Output is being flushed.*/
0*PENDIN |/*Retype pending input at next read or input character.*/
0*IEXTEN |/*Enable extended (implementation-defined) functions.*/
#endif
tty_smode.c_cc[VMIN] =0;/* Note that VMIN is the same as VEOF! */
tty_smode.c_cc[VTIME] =0;/* Note that VTIME is the same as VEOL! */
tty_smode.c_cc[VINTR] =3;
tcsetattr(0, TCSADRAIN, &tty_smode);
#ifdef DEBUG
show_terminal_settings(&tty_smode);
#endif
#endif /* !__OSE__ */
/*
* "Write a ^L to the FIFO which causes the other end to redisplay
* the input line."
* This does not seem to work as was intended in old comment above.
* However, this control character is now (R12B-3) used by run_erl
* to trigger the version handshaking between to_erl and run_erl
* at the start of every new to_erl-session.
*/
if (write(wfd, "\014", 1) < 0) {
fprintf(stderr, "Error in writing ^L to FIFO.\n");
}
#ifdef __OSE__
/* we have a tiny stack so we malloc the buffers */
stdin_buf = malloc(sizeof(char) * BUFSIZ);
pipe_buf = malloc(sizeof(char) * BUFSIZ);
efs_examine_fd(rfd,FLIB_FD_HANDLE,&pipe_fh);
efs_examine_fd(0,FLIB_FD_HANDLE,&stdin_fh);
READ_AIO(stdin_read_req,0,BUFSIZ,stdin_buf);
READ_AIO(pipe_read_req,rfd,BUFSIZ,pipe_buf);
#endif
/*
* read and write
*/
while (1) {
#ifndef __OSE__
FD_ZERO(&readfds);
FD_SET(0, &readfds);
FD_SET(rfd, &readfds);
if (select(rfd + 1, &readfds, NULL, NULL, NULL) < 0) {
if (recv_sig) {
FD_ZERO(&readfds);
}
else {
fprintf(stderr, "Error in select.\n");
break;
}
}
len = 0;
/*
* Read from terminal and write to FIFO
*/
if (recv_sig) {
switch (recv_sig) {
case SIGINT:
fprintf(stderr, "[Break]\n\r");
buf[0] = '\003';
len = 1;
break;
case SIGWINCH:
len = window_size_seq(buf,sizeof(buf));
break;
default:
fprintf(stderr,"Unexpected signal: %u\n",recv_sig);
}
recv_sig = 0;
}
else
#else /* __OSE__ */
SIGSELECT sigsel[] = {0};
sig = receive(sigsel);
len = 0;
#endif
#ifndef __OSE__
if (FD_ISSET(0,&readfds)) {
len = read(0, buf, sizeof(buf));
#else /* __OSE__ */
if (sig->signo == FM_READ_PTR_REPLY &&
sig->fm_read_ptr.handle == stdin_fh) {
len = sig->fm_read_ptr.status == EFS_SUCCESS ? sig->fm_read_ptr.actual : -1;
buf = sig->fm_read_ptr.buffer;
#endif
if (len <= 0) {
close(rfd);
close(wfd);
if (len < 0) {
fprintf(stderr, "Error in reading from stdin.\n");
} else {
fprintf(stderr, "[EOF]\n\r");
}
break;
}
/* check if there is an eof character in input */
for (i = 0; i < len-1 && buf[i] != tty_eof; i++);
if (buf[i] == tty_eof) {
fprintf(stderr, "[Quit]\n\r");
break;
}
}
if (len) {
#ifdef DEBUG
if(write(1, buf, len));
#endif
if (write_all(wfd, buf, len) != len) {
fprintf(stderr, "Error in writing to FIFO.\n");
close(rfd);
close(wfd);
break;
}
STATUS("\" OK\r\n");
#ifdef __OSE__
aio_dispatch(sig);
READ_AIO(stdin_read_req, 0, BUFSIZ, stdin_buf);
#endif
}
/*
* Read from FIFO, write to terminal.
*/
#ifndef __OSE__
if (FD_ISSET(rfd, &readfds)) {
STATUS("FIFO read: ");
len = read(rfd, buf, BUFSIZ);
#else /* __OSE__ */
if (sig->signo == FM_READ_PTR_REPLY &&
sig->fm_read_ptr.handle == pipe_fh) {
len = sig->fm_read_ptr.status == EFS_SUCCESS ? sig->fm_read_ptr.actual : -1;
buf = sig->fm_read_ptr.buffer;
#endif
if (len < 0 && errno == EAGAIN) {
/*
* No data this time, but the writing end of the FIFO is still open.
* Do nothing.
*/
;
} else if (len <= 0) {
/*
* Either an error or end of file. In either case, break out
* of the loop.
*/
close(rfd);
close(wfd);
if (len < 0) {
fprintf(stderr, "Error in reading from FIFO.\n");
} else
fprintf(stderr, "[End]\n\r");
break;
} else {
if (!got_some) {
if ((len=version_handshake(buf,len,wfd)) < 0) {
close(rfd);
close(wfd);
break;
}
#ifndef __OSE__
if (protocol_ver >= 1) {
/* Tell run_erl size of terminal window */
signal(SIGWINCH, handle_sigwinch);
raise(SIGWINCH);
}
#endif
got_some = 1;
}
/*
* We successfully read at least one character. Write what we got.
*/
STATUS("Terminal write: \"");
if (write_all(1, buf, len) != len) {
fprintf(stderr, "Error in writing to terminal.\n");
close(rfd);
close(wfd);
break;
}
STATUS("\" OK\r\n");
#ifdef __OSE__
aio_dispatch(sig);
READ_AIO(pipe_read_req, rfd, BUFSIZ, pipe_buf);
#endif
}
}
}
#ifndef __OSE__
/*
* Reset terminal characterstics
* XXX
*/
tcsetattr(0, TCSADRAIN, &tty_rmode);
#endif
return 0;
}
/* Call write() until entire buffer has been written or error.
* Return len or -1.
*/
static int write_all(int fd, const char* buf, int len)
{
int left = len;
int written;
while (left) {
written = write(fd,buf,left);
if (written < 0) {
return -1;
}
left -= written;
buf += written;
}
return len;
}
#ifndef __OSE__
static int window_size_seq(char* buf, size_t bufsz)
{
#ifdef TIOCGWINSZ
struct winsize ws;
static const char prefix[] = "\033_";
static const char suffix[] = "\033\\";
/* This Esc sequence is called "Application Program Command"
and seems suitable to use for our own customized stuff. */
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == 0) {
int len = sn_printf(buf, bufsz, "%swinsize=%u,%u%s",
prefix, ws.ws_col, ws.ws_row, suffix);
return len;
}
#endif /* TIOCGWINSZ */
return 0;
}
#endif /* !__OSE__ */
/* to_erl run_erl
* | |
* |---------- '\014' -------->| (session start)
* | |
* |<---- "[run_erl v1-0]" ----| (version interval)
* | |
* |--- Esc_"version=1"Esc\ -->| (common version)
* | |
*/
static int version_handshake(char* buf, int len, int wfd)
{
unsigned re_high=0, re_low;
char *end = find_str(buf,len,"]\n");
if (end && sscanf(buf,"[run_erl v%u-%u",&re_high,&re_low)==2) {
char wbuf[30];
int wlen;
if (re_low > RUN_ERL_HI_VER || re_high < RUN_ERL_LO_VER) {
fprintf(stderr,"Incompatible versions: to_erl=v%u-%u run_erl=v%u-%u\n",
RUN_ERL_HI_VER, RUN_ERL_LO_VER, re_high, re_low);
return -1;
}
/* Choose highest common version */
protocol_ver = re_high < RUN_ERL_HI_VER ? re_high : RUN_ERL_HI_VER;
wlen = sn_printf(wbuf, sizeof(wbuf), "\033_version=%u\033\\",
protocol_ver);
if (write_all(wfd, wbuf, wlen) < 0) {
fprintf(stderr,"Failed to send version handshake\n");
return -1;
}
end += 2;
len -= (end-buf);
memmove(buf,end,len);
}
else { /* we assume old run_erl without version handshake */
protocol_ver = 0;
}
if (re_high != RUN_ERL_HI_VER) {
fprintf(stderr,"run_erl has different version, "
"using common protocol level %u\n", protocol_ver);
}
return len;
}
