Strange wait for input in background processes

Hi,

   I've noticed lately that when I run our main exe in background via a command like:

   $ minosexe -b -q myscript.C &

the process hangs:

[1]+ Stopped minosexe -bq myscript.C

whereas:

   $ minosexe -b -q myscript.C < /dev/null &

works. To get the first to move on I have to bring it to the foreground for a minute and then return it to background.

Both indicate that something wants the terminal connected even if it isn't reading actual input (as far as I can tell).

If I connect to the stalled process via gdb I get the traceback below. Could a test be put in place in the readline handling to see if it is connected to a terminal before trying to do this?

I'm running under bash shell on Scientific Linux 4.4 w/ ROOT versions:

    v5.20/00, v5.22/00c, v5.24/00b, v5.26/00b and SVN HEAD.

For the SVN HEAD version the traceback is: (gdb) where
#0 0x002577a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x04bb13f0 in tcsetattr () from /lib/tls/libc.so.6
#2 0x01b5645a in tty_setup (el=0x8694888) at core/editline/src/
tty.cxx:539
#3 0x01b5661e in tty_init (el=0x8694888) at core/editline/src/
tty.cxx:575
#4 0x01b41cdc in el_init (prog=0x1eec74f "", fin=0x4c19740,
fout=0x4c195e0,

     ferr=0x4c19480) at core/editline/src/el.cxx:93
#5 0x01b4acaf in rl_initialize () at core/editline/src/readline.cxx:223
#6 0x01b4c6a9 in stifle_history (max=400)

     at core/editline/src/readline.cxx:996
#7 0x01b3bb2d in Gl_histsize (size=500, save=400)

     at core/editline/src/Getline_el.cxx:410
#8 0x017511a5 in TRint (this=0x840dd40, appClassName=0x1520eaf "TAPP",

     argc=0x153cd90, argv=0x153cda0, options=0x0, numOptions=0, noLogo=true)

     at core/rint/src/TRint.cxx:232
#9 0x014e946a in JobCRootEnv (this=0x840c8f8, argc=3, argv=0xbfffb3d4)

     at /afs/fnal.gov/files/data/minos/d120/packages/JobControl/HEAD/ JobCRootEnv.cxx:146
#10 0x014c3030 in JobCEnv (this=0x840c890, argc=3, argv=0xbfffb3d4)

     at /afs/fnal.gov/files/data/minos/d120/packages/JobControl/HEAD/ JobCEnv.cxx:100
#11 0x014c40e5 in JobCEnv::Instance (argc=3, argv=0xbfffb3d4)

     at /afs/fnal.gov/files/data/minos/d120/packages/JobControl/HEAD/ JobCEnv.cxx:376
#12 0x001fbaf2 in main (argc=3, argv=0xbfffb3d4)

     at /afs/fnal.gov/files/data/minos/d120/packages/JobControl/HEAD/ main/JobCmain.cxx:19
#13 0x04b06de3 in __libc_start_main () from /lib/tls/libc.so.6
#14 0x08048a01 in _start ()

Robert W. Hatcher | rhatcher_at_fnal.gov 630-840-3102 FNAL CD/REX (MINOS) | MS 220, PO Box 500, Batavia IL 60510 Received on Wed Mar 03 2010 - 21:24:12 CET