Rush Logo Rush Submit and Render Scripts
(C) Copyright 1995,2000 Greg Ercolano. All rights reserved.
V 102.43 04/03/08

   Submit/Render Scripts  

     Submit/Render Scripts 
    Simple Maya Submit/Render Scripts
    These are simple examples to run Maya's 'render' command through Rush.     
    These self contained scripts act as both a submit and render script.

    Advanced Maya Submit/Render Scripts That Autostart Irush
    These are slightly more complex examples that read back the jobid     
    from a submitted job, and automatically bring up Irush.


  Simple Submit/Render Scripts

    Here are some simple examples of submitting a Maya 'Render' command in various scripting languages.

    Here is the simple Maya render script written in Csh; it doesn't try to do anything fancy, it just submits the job and starts it rendering, without popping up irush.

    It's important to put your scripts on your file server, and to invoke the script with an absolute path, because the script will submit itself with that path, so the path must be resolvable on all machines that will be rendering.

    Here's the Csh script:

      Csh Simple Maya Submit/Render Script 
      #!/bin/csh -f

# SUBMIT THE JOB IF NO ARGS SPECIFIED
if ( "$1" == "" ) then
    if ( $?RUSH_ISDAEMON ) exit 1                                 # Prevent 'network worm' style recursion

    set scene  = "//server/scenes/foo.ma"                       # CHANGE THIS: scene file to render
    set logdir = "$scene.log"                                   # log directory based on scene pathname
       
    if ( ! -d $logdir ) mkdir -m 0777 $logdir                   # create log directory if none

    # Submit the job
    rush -submit << EOF
    title       SHOW/SHOT
    ram         250
    frames      1-10
    logdir      $logdir
    command     csh $0 -render $scene
    cpus        +any=5@1
EOF
    if ( $status != 0 ) exit 1                                  # Submit Failed
    exit 0                                                      # Submit OK
endif

# RENDERING ON REMOTE MACHINE?
if ( "$1" == "-render" ) then
    echo "--- Working on frame $RUSH_FRAME"
    set cmd = "Render -s $RUSH_FRAME -e $RUSH_FRAME $2"         # command to run, $2 is scene
    echo "--- Executing: $cmd"                                  # print what we're executing
    $cmd                                                        # run the command..
    set err = $status                                           # ..get exit code
    if ( $err != 0 ) then
        echo "--- Render failed (EXIT CODE=$err)"               # Failed? show error code
        exit 1                                                  # 'exit 1' tells rush frame "Fail"
    endif
    echo --- Render OK                                          # Worked?
    exit 0                                                      # 'exit 0' tells rush frame "Done"
endif
                                                                      

    ..and the same script written as a Bourne Shell:

      Bourne Simple Maya Submit/Render Script 
      #!/bin/sh

# SUBMIT THE JOB IF NO ARGS SPECIFIED
if [ "$1" = "" ]; then
    if [ "$RUSH_ISDAEMON" != "" ]; then exit 1; fi                # Prevent 'network worm' style recursion

    scene="//server/scenes/foo.ma"                              # CHANGE THIS: scene file to render
    logdir="$scene.log"                                         # log directory based on scene pathname

    if [ ! -d $logdir ]; then mkdir -m 0777 $logdir; fi         # create log directory if none

    # SUBMIT JOB
    rush -submit << EOF
    title       SHOW/SHOT
    ram         250
    frames      1-10
    logdir      $logdir
    command     sh $0 -render $scene
    cpus        +any=5@1
EOF

    if [ $? != 0 ]; then exit 1; fi                             # Submit Failed
    exit 0                                                      # Submit OK
fi

# RENDERING ON REMOTE MACHINE?
if [ "$1" = "-render" ]; then
    echo "--- Working on frame $RUSH_FRAME"

    cmd="Render -s $RUSH_FRAME -e $RUSH_FRAME $2"               # command to run, $2 is scene
    echo "--- Executing: $cmd"                                  # print what we're executing
    eval $cmd                                                   # run the command..
    err=$?                                                      # ..get exit code
    if [ $err != 0 ]; then
        echo "--- Render failed (EXIT CODE=$err)"               # Failed? show error code
        exit 1                                                  # 'exit 1' tells rush frame "Fail"
    fi
    echo --- Render OK                                          # Worked?
    exit 0                                                      # 'exit 0' tells rush frame "Done"
fi
                                                                      

    ..and the same script in Perl:

      Perl Simple Maya Submit/Render Script 
      #!/usr/bin/perl -w
use strict;
$|=1;

# SUBMIT JOB IF NO ARGS SPECIFIED
if ( ! defined($ARGV[0]) ) {
    if ( defined($ENV{RUSH_ISDAEMON}) ) { exit(1); }                 # Prevent 'network worm' style recursion

    my $scene = "//server/scenes/foo.ma";                          # CHANGE THIS: scene file to render
    my $logdir = "$scene.log";                                     # log directory based on scene pathname

    if ( ! -d $logdir ) {                                          # create log directory if none
        unless(mkdir($logdir, 0777)) {
            print STDERR "mkdir $logdir: $!\n"; exit(1);
        }
    }

    # SUBMIT JOB
    unless( open(SUBMIT, "|rush -submit") )
        { print STDERR "rush -submit: $!\n"; exit(1); }
    print SUBMIT <<"EOF";
    title       SHOW/SHOT
    ram         250
    frames      1-10
    logdir      $logdir
    command     perl $0 -render $scene
    cpus        +any=5\@1
EOF
    close(SUBMIT);

    # Non-zero exit indicates submit failed
    if ( $? >> 8 ) 
        { print STDERR "--- Submit failed\n"; exit(1); }                 # Submit Failed
    exit(0);                                                             # Submit OK
}

# RENDERING ON REMOTE MACHINE?
if ( $ARGV[0] eq "-render" ) {
    print "--- Working on frame $ENV{RUSH_FRAME}\n";

    my $cmd = "Render -s $ENV{RUSH_FRAME} -e $ENV{RUSH_FRAME} $ARGV[1]"; # command to run, $ARGV[1] is scene
    printf("--- Executing: %s\n", $cmd);                                 # print what we're executing
    my $err = system($cmd);                                              # run the command, get exit code
    if ( $err != 0 ) {
        printf("--- Render failed (EXIT CODE=%d)\n", $err << 8);         # Failed? show error code
        exit(1);                                                         # exit(1) tells rush frame "Fail"
    }
    print "--- Render OK\n";                                             # Worked?
    exit(0);                                                             # exit(0) tells rush frame "Done"
}
                                                                      

    ..and the same script in Python:

      Python Simple Maya Submit/Render Script 
      #!/usr/bin/env python
import os
import sys

# SUBMIT THE JOB IF NO ARGS SPECIFIED
if ( len(sys.argv) <= 1 ):
    if ( os.environ.has_key("RUSH_ISDAEMON") ):                        # Prevent 'network worm' style recursion
        sys.exit(1)

    scene = "//server/scenes/foo.ma"                                 # CHANGE THIS: scene file to render
    logdir = scene + ".log"                                          # log directory based on scene pathname

    # Create log directory if none
    if ( not os.path.isdir(logdir) ):
        os.mkdir(logdir, 0777)

    # Submit the job
    submit = os.popen("rush -submit", 'w')
    submit.write("title    SHOW/SHOT\n" +
                 "ram      250\n" +
                 "frames   1-10\n" +
                 "logdir   %s\n" % logdir +
                 "command  python %s -render %s\n" % ( sys.argv[0] , scene ) +
                 "cpus     +any=5@1\n")
    err = submit.close()

    # Non-zero exit indicates submit failed
    if err:
        sys.exit(1)                                                  # Submit Failed
    sys.exit(0)                                                      # Submit OK

# RENDERING ON REMOTE MACHINE?
if ( sys.argv[1] == "-render" ):
    print "--- Working on frame %s" % os.environ["RUSH_FRAME"]

    # Command to execute, sys.argv[2] is scene file
    cmd = "Render -s %s -e %s %s" % \
          ( os.environ["RUSH_FRAME"], os.environ["RUSH_FRAME"], sys.argv[2] )

    print "--- Executing: %s" % cmd                                  # print what we're executing
    sys.stdout.flush()
    err = os.system(cmd)                                             # run command, get exit code
    if err:
        print "--- Render failed (EXIT CODE=%s)" % (err >> 8)  # Failed? show error code
        sys.exit(1)                                                  # 'sys.exit(1)' tells rush frame "Fail"

    print "--- Render OK"                                            # Worked?
    sys.exit(0)                                                      # 'sys.exit(0)' tells rush frame "Done"
                                                                      

    ..and the same script in Ruby:

      Ruby Simple Maya Submit/Render Script 
      #!/usr/bin/env ruby

if ARGV[0] == nil

    # SUBMIT THE JOB IF NO ARGS ARE SPECIFIED

    if ( ENV['RUSH_ISDAEMON'] )			# Prevent 'network worm' recursion
        exit(1)
    end

    scene  = "//meade/net/tmp/scenes/foo.ma"	# CHANGE THIS: scene file to render
    logdir = scene + ".log"			# log dir based on scene pathname

    if ( ! File.directory?(logdir) )
        Dir.mkdir(logdir, 0777)			# create log directory if none
    end

    # SUBMIT JOB
    submit = IO.popen("rush -submit", "w")
    submit.puts <<-EOF
	title   SHOW/SHOT
	ram     250
	frames  1-10
	logdir  #{logdir}
	command ruby #{$0} -render #{scene}
	cpus    +any=5
    EOF
    submit.close_write()

    # Non-zero exit indicates submit failed
    if ($? >> 8) != 0
        print "--- submit failed\n"
	exit(1)
    end
    exit(0)

elsif ARGV[0] == "-render"

    # RENDERING ON REMOTE MACHINE?
    scene = ARGV[1]
    print "--- Working on frame #{ENV['RUSH_FRAME']}...\n"

    cmd = "echo Render -r sw -s #{ENV['RUSH_FRAME']} -e #{ENV['RUSH_FRAME']} #{scene}"
    print "--- Executing: #{cmd}\n"
    system(cmd)
    if $? != 0
	printf("--- Render failed (EXIT CODE=%d)\n", ($? >> 8))
	exit(1)			# RUSH: FAIL
    else
	print "--- Render OK\n"
	exit(0)			# RUSH: OK
    end
else
    print "#{$0}: Unknown argument '#{ARGV[0]}'\n"
    exit(1)
end
                                                                      

    ..and the same script in C++:

      C Simple Maya Submit/Render Script 
      
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <iostream>
#include <string>

using namespace std;

// C++ EXAMPLE: Submit and Render
//
//        UNIX COMPILE: g++ filename.cpp -o filename
//     WINDOWS COMPILE: cl /TP filename.cpp
//

#ifdef _WIN32
#include <direct.h>
#define popen           _popen 
#define pclose          _pclose 
#define mkdir(a,b)      _mkdir(a)
#endif

int main(int argc, char **argv) {
    // SUBMIT THE JOB IF NO ARGS SPECIFIED
    if ( argc < 2 ) {
        if ( getenv("RUSH_ISDAEMON") ) exit(1);                                      // Prevent 'network worm' style recursion

        string scene = "/meade/net/tmp/scenes/foo.ma";                             // CHANGE THIS: scene file to render
        string logdir = scene; logdir += ".log";                                   // log directory based on scene pathname

        // MAKE LOGDIR IF NONE
        struct stat buf;
        if ( stat(logdir.c_str(), &buf) < 0 && errno == ENOENT ) {
            if ( mkdir(logdir.c_str(), 0777) < 0 ) {                               // create log directory if none
                perror(logdir.c_str()); exit(1);
            }
        }

        // Submit the job
        FILE *fp;
        if ( ( fp = popen("rush -submit", "w") ) == NULL )
            { perror("couldn't popen(rush -submit)"); exit(1); }
        fprintf(fp, "title     SHOW/SHOT\n");
        fprintf(fp, "ram       250\n");
        fprintf(fp, "frames    1-10\n");
        fprintf(fp, "logdir    %s\n", logdir.c_str());
        fprintf(fp, "command   %s -render %s\n", argv[0], scene.c_str());
        fprintf(fp, "cpus      +any=5@1\n");
        if ( pclose(fp) < 0 )                                                      // Submit Failed
            { cerr << "--- Submit failed" << endl; exit(1); }                      // Submit OK
        exit(0);
    }

    // RENDERING ON REMOTE MACHINE?
    if ( argc >= 2 && strcmp(argv[1], "-render") == 0 ) {
        cout << "--- Working on frame " << getenv("RUSH_FRAME") << endl;

        string cmd = "Render";                                                     // build command to run..
               cmd += " -s "; cmd += getenv("RUSH_FRAME");
               cmd += " -e "; cmd += getenv("RUSH_FRAME");
               cmd += " ";    cmd += argv[2];                                      // ..argv[2] will be scene filename

        cerr << "--- Executing: " << cmd << endl;                                  // print command being executed
        int err = system(cmd.c_str());                                             // run command, get exit code
        if ( err != 0 ) {
            cerr << "--- Render failed (EXIT CODE=" << (err>>8) << ")" << endl;    // Failed? show error code
            exit(1);                                                               // exit(1) tells rush frame "Fail"
        }
        cerr << "--- Render OK" << endl;                                           // Worked?
        exit(0);                                                                   // exit(0) tells rush frame "Done"
    }
    return(0);
}
                                                                      







  Submit/Render Scripts That Auto-Start Irush
    Here are fleshed out versions of the above simple submit scripts that auto-launch irush, and adds batching.

    Here's the modified Csh script:

      Csh 'Autostart Irush' Maya Submit/Render Script 
      #!/bin/csh -f

# SUBMIT THE JOB IF NO ARGS SPECIFIED
if ( "$1" == "" ) then
    if ( $?RUSH_ISDAEMON ) exit 1                 # Prevent 'network worm' style recursion

    # User should change these as needed
    set sfrm   = 1                              # Start frame
    set efrm   = 53                             # End frame
    set batch  = 5                              # Batch frames (1 disables)
    set scene  = "//server/scenes/foo.ma"       # Scene file to render
    set logdir = "$scene.log"                   # Log directory based on scene pathname
       
    if ( ! -d $logdir ) mkdir -m 0777 $logdir   # create log directory if none

    # SUBMIT THE JOB
    #    'eval' parses the 'setenv RUSH_JOBID' environment setting
    #
    eval `rush -submit` << EOF
    title       SHOW/SHOT
    ram         250
    frames      $sfrm-$efrm,$batch
    logdir      $logdir
    command     csh $0 -render $scene $batch $efrm
    cpus        +any=5@1
EOF
    if ( $status != 0 ) exit 1                  # Submit Failed

    # Submit OK
    #    Print jobid, start irush monitoring job
    #
    echo "--- RUSH_JOBID is $RUSH_JOBID"
    irush -button Frames
    exit 0
endif

# RENDERING ON REMOTE MACHINE?
if ( "$1" == "-render" ) then
    set scene = "$2"

    # HANDLE BATCHING
    @ batch   = $3
    @ lastfrm = $4
    @ sfrm    = $RUSH_FRAME
    @ efrm    = $RUSH_FRAME + $batch - 1
    if ( $efrm > $lastfrm ) @ efrm = $lastfrm

    # PRINT FRAMES BEING RENDERED
    if ( $sfrm == $efrm ) echo "--- Working on frame $sfrm"
    if ( $sfrm != $efrm ) echo "--- Working on frames $sfrm - $efrm"

    # START RENDER, CHECK FOR ERRORS
    set cmd = "Render -s $sfrm -e $efrm $scene"    # command to run
    echo "--- Executing: $cmd"                     # print what we're executing
    $cmd                                           # run the command
    set err = $status                              # check for non-zero exit code from Render
    if ( $err != 0 ) then
        echo "--- Render failed (EXIT CODE=$err)"  # Failed? show error code
        exit 1                                     # 'exit 1' tells rush frame "Fail"
    endif
    echo "--- Render OK"                           # Worked?
    exit 0                                         # 'exit 0' tells rush frame "Done"
endif

# BAD ARGUMENT
echo "${0}: unknown argument $1"
exit 1
                                                                      

    ..and the same script written as a Bourne Shell:

      Bourne 'Autostart Irush' Maya Submit/Render Script 
      #!/bin/sh

# SUBMIT THE JOB IF NO ARGS SPECIFIED
if [ "$1" = "" ]; then
    if [ "$RUSH_ISDAEMON" != "" ]; then exit 1; fi    # Prevent 'network worm' style recursion

    # User should change these as needed
    sfrm=1                                          # Start frame
    efrm=53                                         # End frame
    batch=5                                         # Batch frames (1 disables)
    scene="//server/scenes/foo.ma"                  # Scene file to render
    logdir="$scene.log"                             # Log directory based on scene pathname

    if [ ! -d $logdir ]; then                       # create log directory if none
        mkdir -m 0777 $logdir
    fi

    # SUBMIT JOB, GRAB OUTPUT
    RUSHOUT=$(rush -submit << EOF
    title       SHOW/SHOT
    ram         250
    frames      $sfrm-$efrm,$batch
    logdir      $logdir
    command     sh $0 -render $scene $batch $efrm
    cpus        +any=5@1
EOF
)
    echo "$RUSHOUT"
    if [ $? != 0 ]; then exit 1; fi          # Submit Failed

    # Submit OK
    #    Parse jobid, print, start irush
    #
    export RUSH_JOBID=${RUSHOUT##setenv RUSH_JOBID }
    echo "--- RUSH_JOBID is $RUSH_JOBID"
    irush -button Frames
    exit 0
fi

# RENDERING ON REMOTE MACHINE?
if [ "$1" = "-render" ]; then
    scene="$2"
    batch="$3"
    lastfrm="$4"
    sfrm=$RUSH_FRAME
    efrm=$(( $RUSH_FRAME + $batch - 1 ))
    if [ $efrm -gt $lastfrm ]; then efrm=$lastfrm; fi

    # PRINT FRAMES BEING RENDERED
    if [ $efrm -gt $lastfrm ]; then
        echo "--- Working on frame $sfrm"
    else
        echo "--- Working on frames $sfrm - $efrm"
    fi

    # START RENDER, CHECK FOR ERRORS
    cmd="Render -s $sfrm -e $efrm $scene"            # command to run
    echo "--- Executing: $cmd"                       # print what we're executing
    eval $cmd                                        # run the command
    err=$?                                           # check for non-zero exit code from Render
    if [ $err != 0 ]; then
        echo "--- Render failed (EXIT CODE=$err)"    # Failed? show error code
        exit 1                                       # 'exit 1' tells rush frame "Fail"
    fi
    echo --- Render OK                               # Worked?
    exit 0                                           # 'exit 0' tells rush frame "Done"
fi

# BAD ARGUMENT
echo "${0}: unknown argument $1"
exit 1
                                                                      

    ..and the same script in Perl:

      Perl 'Autostart Irush' Maya Submit/Render Script 
      
#!/usr/bin/perl -w
use strict;
$|=1;

# SUBMIT JOB IF NO ARGS SPECIFIED
if ( ! defined($ARGV[0]) ) {
    if ( defined($ENV{RUSH_ISDAEMON}) ) { exit(1); }   # Prevent 'network worm' style recursion

    # User should change these as needed
    my $sfrm   = 1;                                  # Start frame
    my $efrm   = 53;                                 # End frame
    my $batch  = 5;                                  # Batch frames (1 disables)
    my $scene  = "//server/scenes/foo.ma";           # Scene file to render
    my $logdir = "$scene.log";                       # Log directory based on scene pathname

    if ( ! -d $logdir )                              # create log directory if none
        { mkdir($logdir, 0777); }

    # SUBMIT THE JOB
    #    Save output to a temp file so we can parse back jobid..
    #
    my $tmpfile = ( ( -d "/var/tmp" ) ? "/var/tmp" : "c:/temp" ) . "/submit-out.$$";
    unless( open(SUBMIT, "|rush -submit > $tmpfile") )
        { print STDERR "rush -submit: $!\n"; exit(1); }
    print SUBMIT <<"EOF";
    title       SHOW/SHOT
    ram         250
    frames      $sfrm-$efrm,$batch
    logdir      $logdir
    command     perl $0 -render $scene $batch $efrm
    cpus        +any=5\@1
EOF
    close(SUBMIT);
    my $err = $?;        # Save exit code for submit

    # Parse jobid from submit output, remove tmpfile
    my $jobid;
    open(RUSHOUT, "<$tmpfile");
    while ( <RUSHOUT> ) {
        print $_;
        if ( /RUSH_JOBID.(\S+)/ ) { $jobid = $1; }
    }
    close(RUSHOUT);
    unlink($tmpfile);

    # Submit failed?
    if ( $? >> 8 || ! defined($jobid) )
        { print STDERR "--- Submit failed\n"; exit(1); }
    
    # Submit OK?
    #    Set RUSH_JOBID, start irush monitoring job
    #
    $ENV{RUSH_JOBID} = $jobid;
    system("irush -button Frames");
    exit(0);
}

# RENDERING ON REMOTE MACHINE?
if ( $ARGV[0] eq "-render" ) {
    my $scene   = $ARGV[1];
    my $batch   = $ARGV[2];
    my $lastfrm = $ARGV[3];
    my $sfrm    = $ENV{RUSH_FRAME};
    my $efrm    = $ENV{RUSH_FRAME} + $batch - 1;
    if ( $efrm > $lastfrm )
        { $efrm = $lastfrm; }

    # PRINT FRAMES BEING RENDERED
    if ( $sfrm == $efrm )
        { print "--- Working on frame $sfrm\n"; }
    else
        { print "--- Working on frames $sfrm - $efrm\n"; }

    # START RENDER, CHECK FOR ERRORS
    my $cmd = "Render -s $sfrm -e $efrm $scene";                  # command to run, $ARGV[1] is scene
    printf("--- Executing: %s\n", $cmd);
    my $err = system($cmd);
    if ( $err != 0 ) {
        printf("--- Render failed (EXIT CODE=%d)\n", $err << 8);  # Failed? show error code
        exit(1);                                                  # exit(1) tells rush frame "Fail"
    }
    print "--- Render OK\n";                                      # Worked?
    exit(0);                                                      # exit(0) tells rush frame "Done"
}

# BAD ARGUMENT
print STDERR "$0: unknown argument $ARGV[0]\n";
exit(1);
                                                                      

    ..and the same script in Python:

      Python 'Autostart Irush' Maya Submit/Render Script 
      #!/usr/bin/env python
import os
import sys
import re

# Parse jobid from rush submit
def ParseJobid(rushoutfile):
    rushout = open(rushoutfile, 'r')
    rushout_lines = ""
    while 1:
        line = rushout.readline()
        if ( line == "" ):
            break
        rushout_lines += line
    print rushout_lines
    rushout.close()
    return(re.search("RUSH_JOBID.(\S+)", rushout_lines).groups()[0])

# SUBMIT THE JOB IF NO ARGS SPECIFIED
if len(sys.argv) <= 1:
    if ( os.environ.has_key("RUSH_ISDAEMON") ):   # Prevent 'network worm' style recursion
        sys.exit(1)

    # User should change these as needed
    sfrm   = 1                                  # Start frame
    efrm   = 53                                 # End frame
    batch  = 5                                  # Batch frames (1 disables)
    scene  = "//server/scenes/foo.ma"           # Scene file to render
    logdir = scene + ".log"                     # Log directory based on scene pathname

    # Create log directory if none
    if ( not os.path.isdir(logdir) ):
        os.mkdir(logdir, 0777)

    # SUBMIT THE JOB
    #    Save output to a temp file so we can parse back jobid..
    #
    tmpfile = "/var/tmp"
    if ( os.path.isdir("c:/temp") ):
        tmpfile = "c:/temp"
    tmpfile = "%s/submit-out.%d" % ( tmpfile, os.getpid() )

    # Submit the job
    submit = os.popen("rush -submit > " + tmpfile, 'w')
    submit.write("title    SHOW/SHOT\n" +
                 "ram      250\n" +
                 "frames   %d-%d,%d\n" % ( sfrm, efrm, batch) +
                 "logdir   %s\n" % logdir +
                 "command  python %s -render %s %s %s\n" % ( sys.argv[0], scene, batch, efrm ) +
                 "cpus     +any=5@1\n")
    err = submit.close()

    # Read submit output, parse jobid, remove tmp file
    os.environ["RUSH_JOBID"] = ParseJobid(tmpfile);
    os.remove(tmpfile)

    # Submit Failed
    if ( err or os.environ["RUSH_JOBID"] == "" ):
        sys.exit(1)

    # Submit OK
    print "--- Starting irush.."
    os.system("irush -button Frames")
    sys.exit(0)

# RENDERING ON REMOTE MACHINE?
if ( sys.argv[1] == "-render" ):
    scene   = sys.argv[2]
    batch   = int(sys.argv[3])
    lastfrm = int(sys.argv[4])
    sfrm    = int(os.environ["RUSH_FRAME"])
    efrm    = int(os.environ["RUSH_FRAME"]) + batch - 1
    if ( efrm > lastfrm ):
        efrm = lastfrm

    # PRINT FRAMES BEING RENDERED
    if ( sfrm == efrm ):
        print "--- Working on frame %d" % sfrm
    else:
        print "--- Working on frames %d - %d" % ( sfrm, efrm )

    # START RENDER, CHECK FOR ERRORS
    cmd = "Render -s %d -e %d %s" % ( sfrm, efrm, sys.argv[2] )
    print "--- Executing: %s" % cmd
    sys.stdout.flush()
    err = os.system(cmd)
    if err:
        print "--- Render failed (EXIT CODE=%s)" % (err >> 8)  # Failed? show error code
        sys.exit(1)                                            # 'sys.exit(1)' tells rush frame "Fail"

    print "--- Render OK"                                      # Worked?
    sys.exit(0)                                                # 'sys.exit(0)' tells rush frame "Done"

# BAD ARGUMENT
stderr.write("%s: unknown argument %s\n" % ( sys.argv[0], sys.argv[1] ) )
sys.exit(1)
                                                                      

    ..and the same script in C++:

      C 'Autostart Irush' Maya Submit/Render Script 
      
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <iostream>
#include <string>

using namespace std;

// C++ EXAMPLE: Submit and Render
//
//        UNIX COMPILE: g++ filename.cpp -o filename
//     WINDOWS COMPILE: cl /TP filename.cpp
//

#ifdef _WIN32
#include <direct.h>
#define popen           _popen 
#define pclose          _pclose 
#define mkdir(a,b)      _mkdir(a)
#endif

// Parse jobid from rush submit
string ParseJobid(const char *tmpfile) {
    string jobid;
    FILE *fp;
    if ( ( fp = fopen(tmpfile, "r") ) != 0 ) {
        char s[1024];
        while ( fgets(s, 1023, fp) ) {
            const char *ss;
            if ( ( ss = strstr(s, "RUSH_JOBID") ) != NULL ) {
                char c;
                char tmp[80];
                if ( sscanf(ss, "RUSH_JOBID%c%79s", &c, tmp) == 2 ) {
                    jobid = tmp;
                }
            }
        }
        fclose(fp);
    } else {
        perror(tmpfile);
    }
    return(jobid);
}

// See if pathname is an existing directory
int IsDirectory(const char *pathname) {
    struct stat buf;
    return ( stat(pathname, &buf) == 0 && S_ISDIR(buf.st_mode) ? 1 : 0 );
}

int main(int argc, char **argv) {
    // SUBMIT THE JOB IF NO ARGS SPECIFIED
    if ( argc < 2 ) {
        if ( getenv("RUSH_ISDAEMON") ) exit(1);                            // Prevent 'network worm' style recursion

        string scene = "/meade/net/tmp/scenes/foo.ma";                   // CHANGE THIS: scene file to render
        string logdir = scene; logdir += ".log";                         // log directory based on scene pathname

        // MAKE LOGDIR IF NONE
        if ( ! IsDirectory(logdir.c_str()) ) {
            if ( mkdir(logdir.c_str(), 0777) < 0 ) {                     // create log directory if none
                perror(logdir.c_str()); exit(1);
            }
        }

        // Submit the job
        char tmpfile[80];
        if ( IsDirectory("c:/temp") )
            { sprintf(tmpfile, "c:/temp/submit-out.%ld", (unsigned long)getpid()); }
        else
            { sprintf(tmpfile, "/var/tmp/submit-out.%ld", (unsigned long)getpid()); }

        string cmd = "rush -submit > "; cmd += tmpfile;
        FILE *fp;
        if ( ( fp = popen(cmd.c_str(), "w") ) == NULL )
            { perror(cmd.c_str()); exit(1); }
        fprintf(fp, "title     SHOW/SHOT\n");
        fprintf(fp, "ram       250\n");
        fprintf(fp, "frames    1-10\n");
        fprintf(fp, "logdir    %s\n", logdir.c_str());
        fprintf(fp, "command   %s -render %s\n", argv[0], scene.c_str());
        fprintf(fp, "cpus      +any=5@1\n");
        int err = pclose(fp);

        // Open the tmpfile, parse the jobid (if any)
        string jobid = ParseJobid(tmpfile);             // get jobid from submit
        setenv("RUSH_JOBID", jobid.c_str(), 1);         // set RUSH_JOBID environment variable
        remove(tmpfile);                                // remove tmpfile

        // Submit Failed?
        if ( err < 0 || jobid == "" )
            { cerr << "--- Submit failed" << endl; exit(1); }

        // Submit OK
        cerr << "--- Starting irush.." << endl;
        system("irush -button Frames");
        exit(0);
    }

    // RENDERING ON REMOTE MACHINE?
    if ( argc >= 2 && strcmp(argv[1], "-render") == 0 ) {
        cout << "--- Working on frame " << getenv("RUSH_FRAME") << endl;

        string cmd = "Render";
        cmd += " -s "; cmd += getenv("RUSH_FRAME");
        cmd += " -e "; cmd += getenv("RUSH_FRAME");
        cmd += " ";    cmd += argv[2];                                             // argv[2] will be scene filename

        int err;
        cerr << "--- Executing: " << cmd << endl;
        if ( ( err = system(cmd.c_str()) ) != 0 ) {
            cerr << "--- Render failed (EXIT CODE=" << (err>>8) << ")" << endl;    // Failed? show error code
            exit(1);                                                               // exit(1) tells rush frame "Fail"
        }
        cerr << "--- Render OK" << endl;                                           // Worked?
        exit(0);                                                                   // exit(0) tells rush frame "Done"
    }
    return(0);
}