300 lines
8.0 KiB
C++
300 lines
8.0 KiB
C++
/* pinfo.h: process table info
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#pragma once
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#include <sys/resource.h>
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#include "thread.h"
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union commune_result
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{
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struct {
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char *s;
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size_t n;
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};
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struct {
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sigset_t pnd;
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sigset_t blk;
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sigset_t ign;
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};
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};
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enum picom
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{
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PICOM_EXTRASTR = 0x80000000,
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PICOM_CMDLINE = 1,
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PICOM_CWD = 2,
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PICOM_ROOT = 3,
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PICOM_FDS = 4,
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PICOM_FD = 5,
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PICOM_PIPE_FHANDLER = 6,
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PICOM_FILE_PATHCONV = 7,
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PICOM_ENVIRON = 8,
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PICOM_SIGINFO = 9
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};
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#define EXITCODE_SET 0x8000000
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#define EXITCODE_NOSET 0x4000000
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#define EXITCODE_RETRY 0x2000000
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#define EXITCODE_OK 0x1000000
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#define EXITCODE_FORK_FAILED 0x0800000
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class fhandler_pipe;
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class _pinfo
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{
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public:
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/* Cygwin pid */
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pid_t pid;
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/* Various flags indicating the state of the process. See PID_
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constants in <sys/cygwin.h>. */
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DWORD process_state;
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pid_t ppid; /* Parent process id. */
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DWORD exitcode; /* set when process exits */
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/* > 0 if started by a cygwin process */
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DWORD cygstarted;
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/* dwProcessId contains the processid used for sending signals. It
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will be reset in a child process when it is capable of receiving
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signals. */
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DWORD dwProcessId;
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/* Used to spawn a child for fork(), among other things. The other
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members of _pinfo take only a bit over 200 bytes. So cut off a
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couple of bytes from progname to allow the _pinfo structure not
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to exceed 64K. Otherwise it blocks another 64K block of VM for
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the process. */
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WCHAR progname[NT_MAX_PATH - 512];
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/* User information.
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The information is derived from the GetUserName system call,
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with the name looked up in /etc/passwd and assigned a default value
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if not found. This data resides in the shared data area (allowing
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tasks to store whatever they want here) so it's for informational
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purposes only. */
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uid_t uid; /* User ID */
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gid_t gid; /* Group ID */
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pid_t pgid; /* Process group ID */
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pid_t sid; /* Session ID */
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int ctty; /* Control tty */
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bool has_pgid_children;/* True if we've forked or spawned children with our GID. */
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/* Resources used by process. */
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long start_time;
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struct rusage rusage_self;
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struct rusage rusage_children;
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int nice;
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/* Non-zero if process was stopped by a signal. */
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char stopsig;
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inline void set_has_pgid_children ()
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{
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if (pgid == pid)
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has_pgid_children = 1;
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}
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inline void set_has_pgid_children (bool val) {has_pgid_children = val;}
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commune_result commune_request (__uint32_t, ...);
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bool alive ();
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fhandler_pipe *pipe_fhandler (int64_t, size_t &);
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void *file_pathconv (int, uint32_t, size_t &);
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char *fd (int fd, size_t &);
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char *fds (size_t &);
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char *root (size_t &);
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char *cwd (size_t &);
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char *cmdline (size_t &);
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char *environ (size_t &);
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char *win_heap_info (size_t &);
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int siginfo (sigset_t &, sigset_t &, sigset_t &);
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bool set_ctty (class fhandler_termios *, int);
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bool alert_parent (char);
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int kill (siginfo_t&);
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bool exists ();
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const char *_ctty (char *);
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/* signals */
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HANDLE sendsig;
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HANDLE exec_sendsig;
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DWORD exec_dwProcessId;
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public:
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friend class pinfo_minimal;
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};
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DWORD WINAPI commune_process (void *);
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enum parent_alerter
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{
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__ALERT_REPARENT = 111, // arbitrary non-signal value
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__ALERT_ALIVE = 112
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};
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class pinfo_minimal
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{
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HANDLE h;
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public:
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HANDLE hProcess;
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HANDLE rd_proc_pipe;
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pinfo_minimal (): h (NULL), hProcess (NULL), rd_proc_pipe (NULL) {}
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void set_rd_proc_pipe (HANDLE& h) {rd_proc_pipe = h;}
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void set_inheritance (bool);
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friend class pinfo;
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};
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class pinfo: public pinfo_minimal
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{
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bool destroy;
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HANDLE winpid_hdl;
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_pinfo *procinfo;
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public:
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bool waiter_ready;
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class cygthread *wait_thread;
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void init (pid_t, DWORD, HANDLE);
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pinfo (_pinfo *x = NULL)
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: pinfo_minimal (), destroy (false), winpid_hdl (NULL), procinfo (x),
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waiter_ready (false), wait_thread (NULL) {}
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pinfo (pid_t n, DWORD flag = 0)
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: pinfo_minimal (), destroy (false), winpid_hdl (NULL), procinfo (NULL),
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waiter_ready (false), wait_thread (NULL)
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{
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init (n, flag, NULL);
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}
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pinfo (HANDLE, pinfo_minimal&, pid_t);
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void thisproc (HANDLE);
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void create_winpid_symlink ();
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inline void _pinfo_release ();
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void release ();
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bool wait ();
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~pinfo ()
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{
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if (destroy && procinfo)
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release ();
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}
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void exit (DWORD n) __attribute__ ((noreturn, ));
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void maybe_set_exit_code_from_windows ();
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void set_exit_code (DWORD n);
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_pinfo *operator -> () const {return procinfo;}
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int operator == (pinfo *x) const {return x->procinfo == procinfo;}
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int operator == (pinfo &x) const {return x.procinfo == procinfo;}
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int operator == (_pinfo *x) const {return x == procinfo;}
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int operator == (void *x) const {return procinfo == x;}
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_pinfo *operator * () const {return procinfo;}
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operator _pinfo * () const {return procinfo;}
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int operator !() const {return !procinfo;}
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void preserve () { destroy = false; }
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void allow_remove () { destroy = true; }
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#ifndef SIG_BAD_MASK // kludge to ensure that sigproc.h included
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// int attach () {system_printf ("attach is not here"); return 0;}
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// int remember (bool) {system_printf ("remember is not here"); return 0;}
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#else
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int attach ()
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{
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int res = proc_subproc (PROC_ATTACH_CHILD, (uintptr_t) this);
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destroy = res ? false : true;
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return res;
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}
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int remember ()
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{
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int res = proc_subproc (PROC_ADD_CHILD, (uintptr_t) this);
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destroy = res ? false : true;
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return res;
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}
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#endif
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HANDLE shared_handle () {return h;}
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HANDLE shared_winpid_handle () {return winpid_hdl;}
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void set_acl ();
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friend class _pinfo;
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friend class winpids;
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private:
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DWORD status_exit (DWORD);
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};
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#define MAX_PID 65536
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#define ISSTATE(p, f) (!!((p)->process_state & f))
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#define NOTSTATE(p, f) (!((p)->process_state & f))
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class winpids
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{
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bool make_copy;
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DWORD npidlist;
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DWORD *pidlist;
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pinfo *pinfolist;
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DWORD pinfo_access; // access type for pinfo open
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DWORD enum_processes (bool winpid);
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DWORD enum_init (bool winpid);
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void add (DWORD& nelem, bool, DWORD pid);
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public:
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DWORD npids;
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inline void reset () { release (); npids = 0;}
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void set (bool winpid);
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winpids (): make_copy (true) {}
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winpids (DWORD acc): make_copy (false), npidlist (0), pidlist (NULL),
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pinfolist (NULL), pinfo_access (acc), npids (0)
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{
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set (0);
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}
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inline DWORD& winpid (int i) const {return pidlist[i];}
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inline _pinfo *operator [] (int i) const {return (_pinfo *) pinfolist[i];}
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~winpids ();
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void release ();
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};
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pid_t create_cygwin_pid ();
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pid_t cygwin_pid (DWORD);
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void pinfo_init (char **, int);
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extern pinfo myself;
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/* Helper class to allow convenient setting and unsetting a process_state
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flag in myself. This is used in certain fhandler read/write methods
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to set the PID_TTYIN/PID_TTYOU flags in myself->process_state. */
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class push_process_state
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{
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private:
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int flag;
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public:
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push_process_state (int add_flag)
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{
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flag = add_flag;
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myself->process_state |= flag;
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}
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void pop () { myself->process_state &= ~(flag); }
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~push_process_state () { pop (); }
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};
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#define _P_VFORK 0
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#define _P_SYSTEM 512
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/* Add this flag in calls to child_info_spawn::worker if the calling function
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is one of 'p' type functions: execlp, execvp, spawnlp, spawnvp. Per POSIX,
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only these p-type functions fall back to call /bin/sh if the file is not a
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binary. The setting of _P_PATH_TYPE_EXEC is used as a bool value in
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av::fixup to decide if the file should be evaluated as a script, or if
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ENOEXEC should be returned. */
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#define _P_PATH_TYPE_EXEC 0x1000
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/* Helper macro to mask actual mode and drop additional flags defined above. */
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#define _P_MODE(x) ((x) & 0xfff)
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#define __ctty() _ctty ((char *) alloca (sizeof ("ctty /dev/tty") + 20))
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#define myctty() myself->__ctty ()
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/* For mmaps across fork(). */
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int fixup_mmaps_after_fork (HANDLE parent);
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/* for shm areas across fork (). */
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int fixup_shms_after_fork ();
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void fill_rusage (struct rusage *, HANDLE);
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void add_rusage (struct rusage *, struct rusage *);
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