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aliguori 279e694bc7 Attempt to detect unconnected ptys (Gerd Hoffman) 
This patch moves the pty char device imlementation away from the generic
filehandle code.  It tries to detect as good as possible whenever there
is someone connected to the slave pty device and only send data down the
road in case someone is listening.  Unfortunaly we have to poll via
timer once in a while to check the status because we have to use read()
on the master pty to figure the status (returns -EIO when unconnected).

Poll intervall for an idle guest is one second, when the guest sends
data to the virtual device linked to the pty we check more frequently.

The point for all of this is to avoid qemu blocking and not responding
any more.  Writing to the master pty handle succeeds even when nobody is
connected to (and reading from) to the slave end of the pty.  The kernel
just bufferes the writes.  And as soon as the kernel buffer is full the
write() call blocks forever ...

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4956 c046a42c-6fe2-441c-8c8c-71466251a162
2008-07-28 18:55:32 +00:00
audio Restore old value of buffer_size 2008-07-09 19:25:30 +00:00
darwin-user variable dynamic translation buffer size 2008-05-28 12:30:31 +00:00
fpu
hw Fix OMAP GPMC register offsets and SYSCTL 8bit io (Kyungmin Park). 2008-07-25 21:07:21 +00:00
keymaps Improve jp106 keyboard support, by Akio Takebe. 2008-07-07 19:29:49 +00:00
linux-user linux-user: Fix target_statfs[64] on 64-bit hosts 2008-07-19 09:38:52 +00:00
pc-bios Add e1000 etherboot ROM from http://www.rom-o-matic.net 2008-07-26 16:53:22 +00:00
slirp Missing include for Slirp on win32 (Eduardo Felipe). 2008-05-17 18:07:00 +00:00
target-alpha Small cleanup of gen_intermediate_code(_internal), by Laurent Desnogues. 2008-07-18 18:01:29 +00:00
target-arm ARMv6: fix SIMD add/sub carry flags (Vincent Palatin). 2008-07-19 10:46:13 +00:00
target-cris CRIS: Correct condition for when to apply fast move flags evaluation. Correct single-stepping over branches. 2008-07-25 21:20:21 +00:00
target-i386 Fix task register type after reset (Avi Kivity) 2008-07-23 13:29:23 +00:00
target-m68k Small cleanup of gen_intermediate_code(_internal), by Laurent Desnogues. 2008-07-18 18:01:29 +00:00
target-mips Use plain standard inline. 2008-07-23 16:16:31 +00:00
target-ppc Small cleanup of gen_intermediate_code(_internal), by Laurent Desnogues. 2008-07-18 18:01:29 +00:00
target-sh4 Small cleanup of gen_intermediate_code(_internal), by Laurent Desnogues. 2008-07-18 18:01:29 +00:00
target-sparc Make MAXTL dynamic, bounds check tl when indexing 2008-07-25 07:42:14 +00:00
tcg Special-case some paths inside tcg_out_tlb_read 2008-07-27 11:09:21 +00:00
tests Make the tests run when built with experimental gcc-cris 4.4. Prettify the logs. 2008-06-06 11:07:50 +00:00
a.out.h
aes.c
aes.h
alpha-dis.c
alpha.ld
arm-dis.c
arm-semi.c Add missing return in arm-semi, by Laurent Desnogues. 2008-07-01 16:40:04 +00:00
arm.ld Link ARM prologue closer to code segment to avoid a build failure 2008-07-10 17:21:31 +00:00
block-bochs.c
block-cloop.c
block-cow.c
block-dmg.c
block-nbd.c Fix typo 2008-07-08 18:57:05 +00:00
block-parallels.c
block-qcow.c Remove dead-code (else-block) from block-qcow.c, by Marc Bevand. 2008-06-05 22:00:45 +00:00
block-qcow2.c Revert fix for CVE-2008-0928. Will be fixed in a different way later. 2008-03-11 23:30:22 +00:00
block-raw-posix.c Add a parameter to disable host cache, by Laurent Vivier. 2008-07-03 11:47:46 +00:00
block-raw-win32.c
block-vmdk.c Fix block-vmdk.c:vmdk_close() use-after-free, by Ed Maste. 2008-05-22 13:51:48 +00:00
block-vpc.c
block-vvfat.c Remove >= asserts on unsigned inputs 2008-07-05 13:41:02 +00:00
block.c Allow QEMU to connect directly to an NBD server, by Laurent Vivier. 2008-07-03 13:41:03 +00:00
block.h Allow QEMU to connect directly to an NBD server, by Laurent Vivier. 2008-07-03 13:41:03 +00:00
block_int.h Revert fix for CVE-2008-0928. Will be fixed in a different way later. 2008-03-11 23:30:22 +00:00
bswap.h e1000: fix unaligned access 2008-03-28 22:30:48 +00:00
Changelog Update 2008-06-08 01:55:07 +00:00
check_ops.sh
cocoa.m Let the USB tablet reach the far bottom and right pixels 2008-03-10 19:34:27 +00:00
configure Do exit if test for hostlongbits on ppc64 fails 2008-07-24 17:51:36 +00:00
console.c Force screen resize if no buffer set (Avi Kivity). 2008-07-19 14:09:20 +00:00
console.h Implement resolution switching in common console code. 2008-07-01 16:24:38 +00:00
COPYING
COPYING.LIB
cpu-all.h Avoid compiler warning. 2008-07-03 21:36:35 +00:00
cpu-defs.h Move interrupt_request and user_mode_only to common cpu state. 2008-07-01 20:01:19 +00:00
cpu-exec.c Support for address masking 2008-07-17 12:53:05 +00:00
cris-dis.c Teach the CRIS disassembler to stay within the provided buffer. 2008-05-06 08:45:10 +00:00
curses.c The non-ncurses curses doesn't have resize_term, so make resizing conditional. 2008-02-22 18:21:28 +00:00
curses_keys.h Typo in curses_keys.h. 2008-03-18 06:55:27 +00:00
cutils.c Prevent guest reusing host memory allocations. 2008-06-09 13:47:45 +00:00
d3des.c
d3des.h
dis-asm.h Fix compiler warnings in common files 2008-05-10 10:14:22 +00:00
disas.c HPPA (PA-RISC) host support 2008-04-12 20:14:54 +00:00
disas.h
dyngen-exec.h Try to avoid glibc global register mangling, again 2008-07-26 17:19:35 +00:00
dyngen.c Preliminary PPC64/Linux host support 2008-07-23 19:17:46 +00:00
elf.h
elf_ops.h
exec-all.h Preliminary PPC64/Linux host support 2008-07-23 19:17:46 +00:00
exec.c Map code buffers below 2G on Sparc64 2008-07-26 15:05:57 +00:00
gdbstub.c More efficient target register / TC accesses. 2008-06-27 10:02:35 +00:00
gdbstub.h
gen-icount.h Spelling fixes, spotted by Stuart Brady. 2008-06-30 17:22:19 +00:00
host-utils.c
host-utils.h Fix always_inline definition for Darwin, by Andreas Faerber. 2008-06-05 22:55:54 +00:00
hostregs_helper.h
hpet.h
hppa-dis.c HPPA (PA-RISC) host support 2008-04-12 20:14:54 +00:00
hppa.ld HPPA (PA-RISC) host support 2008-04-12 20:14:54 +00:00
i386-dis.c Add missing const, by Stefan Weil. 2008-07-20 18:55:00 +00:00
i386.ld Add TLS sections. 2008-05-31 16:21:33 +00:00
ia64.ld
keymaps.c
kqemu.c Fix error reporting under Win32 (CreateFile does not set errno) 2008-06-08 01:55:09 +00:00
kqemu.h kqemu API change - allow use of kqemu with 32 bit QEMU on a 64 bit host 2008-05-30 20:48:25 +00:00
LICENSE use the TCG code generator 2008-02-01 10:50:11 +00:00
loader.c Remove most uses of phys_ram_base (initial patch by Ian Jackson) 2008-05-12 17:22:13 +00:00
m68k-dis.c
m68k-semi.c
m68k.ld
MAINTAINERS update 2008-06-04 14:57:43 +00:00
Makefile Add e1000 etherboot ROM from http://www.rom-o-matic.net 2008-07-26 16:53:22 +00:00
Makefile.target Try to avoid glibc global register mangling, again 2008-07-26 17:19:35 +00:00
mips-dis.c
mips.ld
mipsel.ld
monitor.c More efficient target register / TC accesses. 2008-06-27 10:02:35 +00:00
nbd.c Add missing return 2008-07-04 11:53:53 +00:00
nbd.h Allow QEMU to connect directly to an NBD server, by Laurent Vivier. 2008-07-03 13:41:03 +00:00
net.h Remove the NIC from vlan on usb destroy. 2008-07-17 21:00:05 +00:00
osdep.c Use correct types to enable > 2G support, based on a patch from 2008-04-27 21:12:55 +00:00
osdep.h Fix always_inline definition for Darwin, by Andreas Faerber. 2008-06-05 22:55:54 +00:00
ppc-dis.c
ppc.ld
ppc64.ld Preliminary PPC64/Linux host support 2008-07-23 19:17:46 +00:00
qemu-binfmt-conf.sh
qemu-char.h
qemu-common.h Implement resolution switching in common console code. 2008-07-01 16:24:38 +00:00
qemu-doc.texi Add T1 and T2 CPUs, add a Sun4v machine 2008-07-22 07:07:34 +00:00
qemu-img.c New qemu-img convert -B option, by Marc Bevand. 2008-06-05 21:53:49 +00:00
qemu-img.texi New qemu-img convert -B option, by Marc Bevand. 2008-06-05 21:53:49 +00:00
qemu-lock.h Multithreaded locking fixes. 2008-06-07 20:50:51 +00:00
qemu-malloc.c Prevent guest reusing host memory allocations. 2008-06-09 13:47:45 +00:00
qemu-nbd.c Allow qemu-nbd --version to show the application name dynamically, by 2008-07-18 18:06:23 +00:00
qemu-nbd.texi Allow QEMU to connect directly to an NBD server, by Laurent Vivier. 2008-07-03 13:41:03 +00:00
qemu-tech.texi Spelling fixes, by Stefan Weil. 2008-06-03 19:51:57 +00:00
qemu-timer.h
qemu_socket.h
readline.c
README
s390-dis.c
s390.ld
sdl.c Fix detection of 15 bit display depth 2008-07-24 11:25:30 +00:00
sdl_keysym.h
sh4-dis.c
softmmu-semi.h
softmmu_exec.h
softmmu_header.h Convert remaining __builtin_expect to likely/unlikely, by Jan Kiszka. 2008-07-03 17:57:36 +00:00
softmmu_template.h Add instruction counter. 2008-06-29 01:03:05 +00:00
sparc-dis.c
sparc.ld
sparc64.ld Map code buffers below 2G on Sparc64 2008-07-26 15:05:57 +00:00
sysemu.h Move CPU save/load registration to common code. 2008-06-30 16:31:04 +00:00
tap-win32.c
texi2pod.pl Update texi2pod.pl. 2008-02-04 14:47:49 +00:00
thunk.c
thunk.h
TODO update 2008-05-13 18:26:52 +00:00
translate-all.c Small cleanup of gen_intermediate_code(_internal), by Laurent Desnogues. 2008-07-18 18:01:29 +00:00
uboot_image.h
usb-linux.c
VERSION
vgafont.h
vl.c Attempt to detect unconnected ptys (Gerd Hoffman) 2008-07-28 18:55:32 +00:00
vnc.c Don't forget to save VNC FB dimensions after resize (Brad Campbell). 2008-06-02 01:40:29 +00:00
vnc_keysym.h Improve jp106 keyboard support, by Akio Takebe. 2008-07-07 19:29:49 +00:00
vnchextile.h
x86_64.ld
x_keymap.c

README 

Read the documentation in qemu-doc.html.

Fabrice Bellard.