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Diffstat (limited to 'erts/etc/vxworks/erl_io.c')
| -rw-r--r-- | erts/etc/vxworks/erl_io.c | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/erts/etc/vxworks/erl_io.c b/erts/etc/vxworks/erl_io.c deleted file mode 100644 index 0032b77079..0000000000 --- a/erts/etc/vxworks/erl_io.c +++ /dev/null @@ -1,108 +0,0 @@ -/* - * %CopyrightBegin% - * - * Copyright Ericsson AB 1997-2009. All Rights Reserved. - * - * The contents of this file are subject to the Erlang Public License, - * Version 1.1, (the "License"); you may not use this file except in - * compliance with the License. You should have received a copy of the - * Erlang Public License along with this software. If not, it can be - * retrieved online at http://www.erlang.org/. - * - * Software distributed under the License is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See - * the License for the specific language governing rights and limitations - * under the License. - * - * %CopyrightEnd% - */ -/* Some stuff to let the Erlang and VxWorks shells coexist peacefully. - Basically, run Erlang as a spawned task with input redirected to - the slave side of a pseudo-tty, and connect explicitly to the master - side of the pseudo-tty to send input to Erlang when desired. */ - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif -#include <stdio.h> -#include <ioLib.h> -#include <taskLib.h> -#include <ptyDrv.h> - -extern int spTaskPriority, spTaskOptions; - -#define TBUFSIZ 512 - -#define DEFAULT_STACK_SIZE 100000 - -static int slavefd = -1, masterfd = -1; -static run_erl(); - -/* Frontend to the Erlang startup function - callable from VxWorks shell - or script. 'arg' is actually a string passed to the real startup. */ -start_erl(arg) -int arg; -{ - int stacksize; - char *stackenv; - - /* create and open the pty - we want the master side to be open - all the time, since closing it probably generates EOF on the - slave side */ - (void)ptyDevCreate("/pty/erlang.", TBUFSIZ, TBUFSIZ); - if (slavefd != -1) - (void)close(slavefd); - slavefd = open("/pty/erlang.S", O_RDONLY, 0); - if (masterfd != -1) - (void)close(masterfd); - masterfd = open("/pty/erlang.M", O_WRONLY, 0); - - /* flush any old leftover garbage */ - (void) ioctl(masterfd, FIOFLUSH, 0); - if ((stackenv = getenv("ERLSTACKSIZE")) == NULL) - stacksize = DEFAULT_STACK_SIZE; - else - stacksize = atoi(stackenv); - /* spawn Erlang, via stub below */ - return(taskSpawn("erlang", spTaskPriority, spTaskOptions, stacksize, - run_erl, arg, 0,0,0,0,0,0,0,0,0)); -} - -/* Little stub that runs in the spawned task - we need this to redirect - stdin reliably (redirections aren't "inherited" in VxWorks) */ -static -run_erl(arg) -int arg; -{ - ioTaskStdSet(0, 0, slavefd); /* redirect stdin to slave side of pty */ - - /* We don't want to redirect stdout/err since no one will be reading - from the master side (to_erl - and the open()s above - could be - made bidirectional, but still the master side would only be read - when to_erl was running), and output can eventually fill the pty - buffer and cause the Erlang system to block. Not redirecting - stdout/err will have the effect that output from Erlang, e.g. the - shell prompt, will appear on console/rlogin/whatever even when - to_erl isn't running, which may be confusing - can't win 'em all... */ - - erl_exec(arg, 0,0,0,0,0,0,0,0); /* call the real startup */ -} - -/* Function callable from VxWorks shell to talk to Erlang - stop talking - and return to VxWorks shell through ^D (EOF) */ -to_erl() -{ - char buf[TBUFSIZ]; - int cc; - - if (masterfd == -1) { /* sanity check */ - fprintf(stderr, "Must start_erl first!\n"); - return(-1); - } - while ((cc = read(0, buf, TBUFSIZ)) > 0) /* just pass everything through */ - if (write(masterfd, buf, cc) != cc) { - fprintf(stderr, "Write to Erlang failed!\n"); - return(-1); - } - return(cc); -} |