newlib-cygwin/winsup/cygwin/pinfo.h

289 lines
7.9 KiB
C++

/* pinfo.h: process table info
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#pragma once
#include <sys/resource.h>
#include "thread.h"
struct commune_result
{
char *s;
DWORD n;
HANDLE handles[2];
};
enum picom
{
PICOM_EXTRASTR = 0x80000000,
PICOM_CMDLINE = 1,
PICOM_CWD = 2,
PICOM_ROOT = 3,
PICOM_FDS = 4,
PICOM_FD = 5,
PICOM_PIPE_FHANDLER = 6
};
#define EXITCODE_SET 0x8000000
#define EXITCODE_NOSET 0x4000000
#define EXITCODE_RETRY 0x2000000
#define EXITCODE_OK 0x1000000
#define EXITCODE_FORK_FAILED 0x0800000
class fhandler_pipe;
class _pinfo
{
public:
/* Cygwin pid */
pid_t pid;
/* Various flags indicating the state of the process. See PID_
constants in <sys/cygwin.h>. */
DWORD process_state;
pid_t ppid; /* Parent process id. */
DWORD exitcode; /* set when process exits */
#define PINFO_REDIR_SIZE ((char *) &myself.procinfo->exitcode - (char *) myself.procinfo)
/* > 0 if started by a cygwin process */
DWORD cygstarted;
/* dwProcessId contains the processid used for sending signals. It
will be reset in a child process when it is capable of receiving
signals. */
DWORD dwProcessId;
/* Used to spawn a child for fork(), among other things. The other
members of _pinfo take only a bit over 200 bytes. So cut off a
couple of bytes from progname to allow the _pinfo structure not
to exceed 64K. Otherwise it blocks another 64K block of VM for
the process. */
WCHAR progname[NT_MAX_PATH - 512];
/* User information.
The information is derived from the GetUserName system call,
with the name looked up in /etc/passwd and assigned a default value
if not found. This data resides in the shared data area (allowing
tasks to store whatever they want here) so it's for informational
purposes only. */
uid_t uid; /* User ID */
gid_t gid; /* Group ID */
pid_t pgid; /* Process group ID */
pid_t sid; /* Session ID */
int ctty; /* Control tty */
bool has_pgid_children;/* True if we've forked or spawned children with our GID. */
/* Resources used by process. */
long start_time;
struct rusage rusage_self;
struct rusage rusage_children;
int nice;
/* Non-zero if process was stopped by a signal. */
char stopsig;
inline void set_has_pgid_children ()
{
if (pgid == pid)
has_pgid_children = 1;
}
inline void set_has_pgid_children (bool val) {has_pgid_children = val;}
commune_result commune_request (__uint32_t, ...);
bool alive ();
fhandler_pipe *pipe_fhandler (int64_t, size_t &);
char *fd (int fd, size_t &);
char *fds (size_t &);
char *root (size_t &);
char *cwd (size_t &);
char *cmdline (size_t &);
char *win_heap_info (size_t &);
bool set_ctty (class fhandler_termios *, int);
bool alert_parent (char);
int __reg2 kill (siginfo_t&);
bool __reg1 exists ();
const char *_ctty (char *);
/* signals */
HANDLE sendsig;
HANDLE exec_sendsig;
DWORD exec_dwProcessId;
public:
friend class pinfo_minimal;
};
DWORD WINAPI commune_process (void *);
enum parent_alerter
{
__ALERT_REPARENT = 111, // arbitrary non-signal value
__ALERT_ALIVE = 112
};
class pinfo_minimal
{
HANDLE h;
public:
HANDLE hProcess;
HANDLE rd_proc_pipe;
pinfo_minimal (): h (NULL), hProcess (NULL), rd_proc_pipe (NULL) {}
void set_rd_proc_pipe (HANDLE& h) {rd_proc_pipe = h;}
friend class pinfo;
};
class pinfo: public pinfo_minimal
{
bool destroy;
_pinfo *procinfo;
public:
bool waiter_ready;
class cygthread *wait_thread;
void __reg3 init (pid_t, DWORD, HANDLE);
pinfo (_pinfo *x = NULL): pinfo_minimal (), destroy (false), procinfo (x),
waiter_ready (false), wait_thread (NULL) {}
pinfo (pid_t n, DWORD flag = 0): pinfo_minimal (), destroy (false),
procinfo (NULL), waiter_ready (false),
wait_thread (NULL)
{
init (n, flag, NULL);
}
pinfo (HANDLE, pinfo_minimal&, pid_t);
void __reg2 thisproc (HANDLE);
inline void _pinfo_release ();
void release ();
bool __reg1 wait ();
~pinfo ()
{
if (destroy && procinfo)
release ();
}
void __reg2 exit (DWORD n) __attribute__ ((noreturn, ));
void __reg1 maybe_set_exit_code_from_windows ();
void __reg2 set_exit_code (DWORD n);
_pinfo *operator -> () const {return procinfo;}
int operator == (pinfo *x) const {return x->procinfo == procinfo;}
int operator == (pinfo &x) const {return x.procinfo == procinfo;}
int operator == (_pinfo *x) const {return x == procinfo;}
int operator == (void *x) const {return procinfo == x;}
_pinfo *operator * () const {return procinfo;}
operator _pinfo * () const {return procinfo;}
int operator !() const {return !procinfo;}
void preserve () { destroy = false; }
void allow_remove () { destroy = true; }
#ifndef SIG_BAD_MASK // kludge to ensure that sigproc.h included
// int reattach () {system_printf ("reattach is not here"); return 0;}
// int remember (bool) {system_printf ("remember is not here"); return 0;}
#else
int reattach ()
{
int res = proc_subproc (PROC_REATTACH_CHILD, (uintptr_t) this);
destroy = res ? false : true;
return res;
}
int remember (bool detach)
{
int res = proc_subproc (detach ? PROC_DETACHED_CHILD : PROC_ADDCHILD,
(uintptr_t) this);
destroy = res ? false : true;
return res;
}
#endif
HANDLE shared_handle () {return h;}
void set_acl ();
friend class _pinfo;
friend class winpids;
private:
DWORD status_exit (DWORD);
};
#define ISSTATE(p, f) (!!((p)->process_state & f))
#define NOTSTATE(p, f) (!((p)->process_state & f))
class winpids
{
bool make_copy;
DWORD npidlist;
DWORD *pidlist;
pinfo *pinfolist;
DWORD pinfo_access; // access type for pinfo open
DWORD enum_processes (bool winpid);
DWORD enum_init (bool winpid);
void add (DWORD& nelem, bool, DWORD pid);
public:
DWORD npids;
inline void reset () { release (); npids = 0;}
void set (bool winpid);
winpids (): make_copy (true) {}
winpids (int): make_copy (false), npidlist (0), pidlist (NULL),
pinfolist (NULL), pinfo_access (0), npids (0) {}
winpids (DWORD acc): make_copy (false), npidlist (0), pidlist (NULL),
pinfolist (NULL), pinfo_access (acc), npids (0)
{
set (0);
}
inline DWORD& winpid (int i) const {return pidlist[i];}
inline _pinfo *operator [] (int i) const {return (_pinfo *) pinfolist[i];}
~winpids ();
void release ();
};
extern __inline pid_t
cygwin_pid (pid_t pid)
{
return pid;
}
void __stdcall pinfo_init (char **, int);
extern pinfo myself;
/* Helper class to allow convenient setting and unsetting a process_state
flag in myself. This is used in certain fhandler read/write methods
to set the PID_TTYIN/PID_TTYOU flags in myself->process_state. */
class push_process_state
{
private:
int flag;
public:
push_process_state (int add_flag)
{
flag = add_flag;
myself->process_state |= flag;
}
void pop () { myself->process_state &= ~(flag); }
~push_process_state () { pop (); }
};
#define _P_VFORK 0
#define _P_SYSTEM 512
/* Add this flag in calls to child_info_spawn::worker if the calling function
is one of 'p' type functions: execlp, execvp, spawnlp, spawnvp. Per POSIX,
only these p-type functions fall back to call /bin/sh if the file is not a
binary. The setting of _P_PATH_TYPE_EXEC is used as a bool value in
av::fixup to decide if the file should be evaluated as a script, or if
ENOEXEC should be returned. */
#define _P_PATH_TYPE_EXEC 0x1000
/* Helper macro to mask actual mode and drop additional flags defined above. */
#define _P_MODE(x) ((x) & 0xfff)
#define __ctty() _ctty ((char *) alloca (sizeof ("ctty /dev/tty") + 20))
#define myctty() myself->__ctty ()
/* For mmaps across fork(). */
int __stdcall fixup_mmaps_after_fork (HANDLE parent);
/* for shm areas across fork (). */
int __stdcall fixup_shms_after_fork ();
void __stdcall fill_rusage (struct rusage *, HANDLE);
void __stdcall add_rusage (struct rusage *, struct rusage *);