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* exceptions.cc: (ctrl_c_handler): Do nothing while a Cygwin subprocess is

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starting.
* child_info.h (init_child_info): Remove pid argument from declaration.
* cygheap.h (init_cygheap::pid): New element.
* dcrt0.cc (dll_crt0_0): Eliminate handling of now-noexistent cygpid parameter
in child_info struct.  Set forkee to 'true' rather than cygpid since the pid
value was never used.
(dll_crt0_1): Ditto.
(_dll_crt0): Ditto.
* fork.cc (fork_child): Don't wait for sigthread.  This is handled in the fork
call now.
(fork_parent): Remove obsolete pid argument from init_child_info call.  Don't
do anything special with cygpid when DEBUGGING.
(fork): Delay all signals during fork.
(fork_init): Don't do anything special when DEBUGGING.
* pinfo.cc (set_myself): Remove pid parameter.  Use new pid field in cygheap.
(pinfo_init): Don't pass pid argument to set_myself.
* sigproc.cc (sig_send): Wait for dwProcessId to be non-zero as well as
sendsig.
(init_child_info): Eliminate handling of pid.
(wait_sig): Implement method to temporarily hold off sending signals.
* sigproc.h (__SIGHOLD): New enum.
(__SIGNOHOLD): Ditto.
* spawn.cc (spawn_guts): Remove obsolete pid argument from init_child_info
call.
This commit is contained in:
Christopher Faylor
2004-09-12 03:47:57 +00:00
parent ca5ec6685a
commit d584454c82
21 changed files with 235 additions and 216 deletions
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114
winsup/cygwin/pipe.cc
View File

@@ -223,9 +223,9 @@ leave:
unlike CreatePipe, which returns a bool for success or failure. */
static int
create_selectable_pipe (PHANDLE read_pipe_ptr,
PHANDLE write_pipe_ptr,
LPSECURITY_ATTRIBUTES sa_ptr,
DWORD psize)
PHANDLE write_pipe_ptr,
LPSECURITY_ATTRIBUTES sa_ptr,
DWORD psize)
{
/* Default to error. */
*read_pipe_ptr = *write_pipe_ptr = INVALID_HANDLE_VALUE;
@@ -251,62 +251,62 @@ create_selectable_pipe (PHANDLE read_pipe_ptr,
debug_printf ("CreateNamedPipe: name %s, size %lu", pipename, psize);
/* Use CreateNamedPipe instead of CreatePipe, because the latter
returns a write handle that does not permit FILE_READ_ATTRIBUTES
access, on versions of win32 earlier than WinXP SP2.
CreatePipe also stupidly creates a full duplex pipe, which is
a waste, since only a single direction is actually used.
It's important to only allow a single instance, to ensure that
the pipe was not created earlier by some other process, even if
the pid has been reused. We avoid FILE_FLAG_FIRST_PIPE_INSTANCE
because that is only available for Win2k SP2 and WinXP. */
returns a write handle that does not permit FILE_READ_ATTRIBUTES
access, on versions of win32 earlier than WinXP SP2.
CreatePipe also stupidly creates a full duplex pipe, which is
a waste, since only a single direction is actually used.
It's important to only allow a single instance, to ensure that
the pipe was not created earlier by some other process, even if
the pid has been reused. We avoid FILE_FLAG_FIRST_PIPE_INSTANCE
because that is only available for Win2k SP2 and WinXP. */
SetLastError (0);
read_pipe = CreateNamedPipe (pipename,
PIPE_ACCESS_INBOUND,
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE,
1, /* max instances */
psize, /* output buffer size */
psize, /* input buffer size */
NMPWAIT_USE_DEFAULT_WAIT,
sa_ptr);
PIPE_ACCESS_INBOUND,
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE,
1, /* max instances */
psize, /* output buffer size */
psize, /* input buffer size */
NMPWAIT_USE_DEFAULT_WAIT,
sa_ptr);
DWORD err = GetLastError ();
/* Win 95 seems to return NULL instead of INVALID_HANDLE_VALUE */
if ((read_pipe || !err) && read_pipe != INVALID_HANDLE_VALUE)
{
debug_printf ("pipe read handle %p", read_pipe);
break;
}
{
debug_printf ("pipe read handle %p", read_pipe);
break;
}
switch (err)
{
case ERROR_PIPE_BUSY:
/* The pipe is already open with compatible parameters.
Pick a new name and retry. */
debug_printf ("pipe busy, retrying");
continue;
case ERROR_ACCESS_DENIED:
/* The pipe is already open with incompatible parameters.
Pick a new name and retry. */
debug_printf ("pipe access denied, retrying");
continue;
case ERROR_CALL_NOT_IMPLEMENTED:
/* We are on an older Win9x platform without named pipes.
Return an anonymous pipe as the best approximation. */
debug_printf ("CreateNamedPipe not implemented, resorting to "
"CreatePipe size %lu", psize);
if (CreatePipe (read_pipe_ptr, write_pipe_ptr, sa_ptr, psize))
{
debug_printf ("pipe read handle %p", *read_pipe_ptr);
debug_printf ("pipe write handle %p", *write_pipe_ptr);
return NO_ERROR;
}
err = GetLastError ();
debug_printf ("CreatePipe failed, %E");
return err;
default:
debug_printf ("CreateNamedPipe failed, %E");
return err;
}
{
case ERROR_PIPE_BUSY:
/* The pipe is already open with compatible parameters.
Pick a new name and retry. */
debug_printf ("pipe busy, retrying");
continue;
case ERROR_ACCESS_DENIED:
/* The pipe is already open with incompatible parameters.
Pick a new name and retry. */
debug_printf ("pipe access denied, retrying");
continue;
case ERROR_CALL_NOT_IMPLEMENTED:
/* We are on an older Win9x platform without named pipes.
Return an anonymous pipe as the best approximation. */
debug_printf ("CreateNamedPipe not implemented, resorting to "
"CreatePipe size %lu", psize);
if (CreatePipe (read_pipe_ptr, write_pipe_ptr, sa_ptr, psize))
{
debug_printf ("pipe read handle %p", *read_pipe_ptr);
debug_printf ("pipe write handle %p", *write_pipe_ptr);
return NO_ERROR;
}
err = GetLastError ();
debug_printf ("CreatePipe failed, %E");
return err;
default:
debug_printf ("CreateNamedPipe failed, %E");
return err;
}
/* NOTREACHED */
}
@@ -315,12 +315,12 @@ create_selectable_pipe (PHANDLE read_pipe_ptr,
/* Open the named pipe for writing.
Be sure to permit FILE_READ_ATTRIBUTES access. */
write_pipe = CreateFile (pipename,
GENERIC_WRITE | FILE_READ_ATTRIBUTES,
0, /* share mode */
sa_ptr,
OPEN_EXISTING,
0, /* flags and attributes */
0); /* handle to template file */
GENERIC_WRITE | FILE_READ_ATTRIBUTES,
0, /* share mode */
sa_ptr,
OPEN_EXISTING,
0, /* flags and attributes */
0); /* handle to template file */
if (write_pipe == INVALID_HANDLE_VALUE)
{