378 lines
8.6 KiB
C++
378 lines
8.6 KiB
C++
/* pinfo.cc: process table support
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Copyright 1996, 1997, 1998, 2000 Cygnus Solutions.
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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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#include <stdlib.h>
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#include <time.h>
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#include <errno.h>
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#include <limits.h>
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#include "winsup.h"
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static char NO_COPY pinfo_dummy[sizeof(pinfo)] = {0};
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pinfo NO_COPY myself ((_pinfo *)&pinfo_dummy); // Avoid myself != NULL checks
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static pinfo NO_COPY myself_identity ((_pinfo *)&pinfo_dummy);
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/* Initialize the process table.
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This is done once when the dll is first loaded. */
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void __stdcall
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set_myself (pid_t pid)
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{
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DWORD winpid = GetCurrentProcessId ();
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if (pid == 1)
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pid = cygwin_pid (winpid);
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myself.init (pid, 1);
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myself->dwProcessId = winpid;
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myself->process_state |= PID_IN_USE;
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myself->start_time = time (NULL); /* Register our starting time. */
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pid_t myself_cyg_pid = cygwin_pid (myself->dwProcessId);
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if (pid != myself_cyg_pid)
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myself_identity.init (myself_cyg_pid, PID_EXECED);
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char buf[30];
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__small_sprintf (buf, "cYg%8x %x", _STRACE_INTERFACE_ACTIVATE_ADDR,
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&strace.active);
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OutputDebugString (buf);
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(void) GetModuleFileName (NULL, myself->progname,
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sizeof(myself->progname));
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if (strace.active)
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{
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extern char osname[];
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strace.prntf (1, "**********************************************");
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strace.prntf (1, "Program name: %s", myself->progname);
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strace.prntf (1, "App version: %d.%d, api: %d.%d",
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user_data->dll_major, user_data->dll_minor,
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user_data->api_major, user_data->api_minor);
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strace.prntf (1, "DLL version: %d.%d, api: %d.%d",
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cygwin_version.dll_major, cygwin_version.dll_minor,
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cygwin_version.api_major, cygwin_version.api_minor);
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strace.prntf (1, "DLL build: %s", cygwin_version.dll_build_date);
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strace.prntf (1, "OS version: Windows %s", osname);
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strace.prntf (1, "**********************************************");
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}
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return;
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}
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/* Initialize the process table entry for the current task.
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This is not called for fork'd tasks, only exec'd ones. */
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void __stdcall
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pinfo_init (LPBYTE info)
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{
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if (info != NULL)
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{
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/* The process was execed. Reuse entry from the original
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owner of this pid. */
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environ_init (0); /* Needs myself but affects calls below */
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/* spawn has already set up a pid structure for us so we'll use that */
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myself->process_state |= PID_CYGPARENT;
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/* Inherit file descriptor information from parent in info.
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*/
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LPBYTE b = dtable.de_linearize_fd_array (info);
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extern char title_buf[];
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if (b && *b)
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old_title = strcpy (title_buf, (char *)b);
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}
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else
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{
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/* Invent our own pid. */
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set_myself (1);
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myself->ppid = 1;
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myself->pgid = myself->sid = myself->pid;
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myself->ctty = -1;
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myself->uid = USHRT_MAX;
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environ_init (0); /* call after myself has been set up */
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}
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debug_printf ("pid %d, pgid %d", myself->pid, myself->pgid);
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}
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struct sigaction&
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_pinfo::getsig(int sig)
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{
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#ifdef _MT_SAFE
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if ( thread2signal )
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return thread2signal->sigs[sig];
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return sigs[sig];
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#else
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return sigs[sig];
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#endif
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};
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sigset_t&
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_pinfo::getsigmask ()
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{
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#ifdef _MT_SAFE
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if ( thread2signal )
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return *thread2signal->sigmask;
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return sig_mask;
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#else
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return sig_mask;
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#endif
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};
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void
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_pinfo::setsigmask (sigset_t _mask)
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{
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#ifdef _MT_SAFE
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if ( thread2signal )
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*(thread2signal->sigmask) = _mask;
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sig_mask=_mask;
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#else
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sig_mask=_mask;
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#endif
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}
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LONG *
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_pinfo::getsigtodo(int sig)
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{
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#ifdef _MT_SAFE
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if ( thread2signal )
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return thread2signal->sigtodo + __SIGOFFSET + sig;
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return _sigtodo + __SIGOFFSET + sig;
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#else
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return _sigtodo + __SIGOFFSET + sig;
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#endif
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}
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extern HANDLE hMainThread;
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HANDLE
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_pinfo::getthread2signal()
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{
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#ifdef _MT_SAFE
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if ( thread2signal )
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return thread2signal->win32_obj_id;
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return hMainThread;
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#else
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return hMainThread;
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#endif
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}
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void
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_pinfo::setthread2signal(void *_thr)
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{
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#ifdef _MT_SAFE
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// assert has myself lock
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thread2signal=(ThreadItem*)_thr;
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#else
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#endif
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}
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void
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_pinfo::copysigs(_pinfo *_other)
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{
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sigs = _other->sigs;
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}
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void
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_pinfo::record_death ()
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{
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/* CGF FIXME - needed? */
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if (dwProcessId == GetCurrentProcessId () && !my_parent_is_alive ())
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{
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process_state = PID_NOT_IN_USE;
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hProcess = NULL;
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}
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}
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void
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pinfo::init (pid_t n, DWORD create)
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{
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if (n == myself->pid)
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{
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child = myself;
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destroy = 0;
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h = NULL;
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return;
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}
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int created;
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char mapname[MAX_PATH];
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__small_sprintf (mapname, "cygpid.%x", n);
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int mapsize;
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if (create & PID_EXECED)
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mapsize = PINFO_REDIR_SIZE;
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else
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mapsize = sizeof (_pinfo);
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if (!create)
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{
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/* CGF FIXME -- deal with inheritance after an exec */
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h = OpenFileMappingA (FILE_MAP_READ | FILE_MAP_WRITE, FALSE, mapname);
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created = 0;
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}
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else
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{
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h = CreateFileMapping ((HANDLE) 0xffffffff, &sec_none_nih,
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PAGE_READWRITE, 0, mapsize, mapname);
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created = h && GetLastError () != ERROR_ALREADY_EXISTS;
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}
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if (!h)
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{
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if (create)
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__seterrno ();
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child = NULL;
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return;
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}
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child = (_pinfo *) MapViewOfFile (h, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0);
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if (child->process_state & PID_EXECED)
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{
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pid_t realpid = child->pid;
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release ();
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if (realpid == n)
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api_fatal ("retrieval of execed process info for pid %d failed due to recursion.", n);
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return init (realpid);
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}
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if (created)
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{
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if (!(create & PID_EXECED))
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child->pid = n;
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else
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{
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child->pid = myself->pid;
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child->process_state |= PID_IN_USE | PID_EXECED;
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}
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}
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destroy = 1;
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}
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/* DOCTOOL-START
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<sect1 id="func-cygwin-winpid-to-pid">
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<title>cygwin_winpid_to_pid</title>
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<funcsynopsis>
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<funcdef>extern "C" pid_t
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<function>cygwin_winpid_to_pid</function>
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</funcdef>
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<paramdef>int <parameter>winpid</parameter></paramdef>
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</funcsynopsis>
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<para>Given a windows pid, converts to the corresponding Cygwin
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pid, if any. Returns -1 if windows pid does not correspond to
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a cygwin pid.</para>
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<example>
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<title>Example use of cygwin_winpid_to_pid</title>
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<programlisting>
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extern "C" cygwin_winpid_to_pid (int winpid);
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pid_t mypid;
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mypid = cygwin_winpid_to_pid (windows_pid);
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</programlisting>
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</example>
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</sect1>
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DOCTOOL-END */
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extern "C" pid_t
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cygwin_winpid_to_pid (int winpid)
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{
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pinfo p (winpid);
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if (p)
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return p->pid;
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set_errno (ESRCH);
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return (pid_t) -1;
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}
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#include <tlhelp32.h>
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#include <psapi.h>
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typedef BOOL (WINAPI * ENUMPROCESSES) (DWORD *, DWORD, DWORD *);
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typedef HANDLE (WINAPI * CREATESNAPSHOT) (DWORD, DWORD);
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typedef BOOL (WINAPI * PROCESSWALK) (HANDLE, LPPROCESSENTRY32);
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typedef BOOL (WINAPI * CLOSESNAPSHOT) (HANDLE);
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static NO_COPY CREATESNAPSHOT myCreateToolhelp32Snapshot = NULL;
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static NO_COPY PROCESSWALK myProcess32First = NULL;
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static NO_COPY PROCESSWALK myProcess32Next = NULL;
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static BOOL WINAPI enum_init (DWORD *lpidProcess, DWORD cb, DWORD *cbneeded);
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static NO_COPY ENUMPROCESSES myEnumProcesses = enum_init;
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static BOOL WINAPI
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EnumProcessesW95 (DWORD *lpidProcess, DWORD cb, DWORD *cbneeded)
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{
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HANDLE h;
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*cbneeded = 0;
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h = myCreateToolhelp32Snapshot (TH32CS_SNAPPROCESS, 0);
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if (!h)
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return 0;
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PROCESSENTRY32 proc;
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int i = 0;
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proc.dwSize = sizeof (proc);
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if (myProcess32First(h, &proc))
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do
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lpidProcess[i++] = cygwin_pid (proc.th32ProcessID);
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while (myProcess32Next (h, &proc));
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CloseHandle (h);
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if (i == 0)
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return 0;
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*cbneeded = i * sizeof (DWORD);
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return 1;
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}
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void
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winpids::init ()
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{
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DWORD n;
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if (!myEnumProcesses (pidlist, sizeof (pidlist) / sizeof (pidlist[0]), &n))
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npids = 0;
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else
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npids = n / sizeof (pidlist[0]);
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pidlist[npids] = 0;
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}
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static BOOL WINAPI
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enum_init (DWORD *lpidProcess, DWORD cb, DWORD *cbneeded)
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{
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HINSTANCE h;
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if (os_being_run == winNT)
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{
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h = LoadLibrary ("psapi.dll");
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if (!h)
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return 0;
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myEnumProcesses = (ENUMPROCESSES) GetProcAddress (h, "EnumProcesses");
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if (!myEnumProcesses)
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return 0;
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}
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else
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{
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h = GetModuleHandle("kernel32.dll");
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myCreateToolhelp32Snapshot = (CREATESNAPSHOT)
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GetProcAddress(h, "CreateToolhelp32Snapshot");
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myProcess32First = (PROCESSWALK)
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GetProcAddress(h, "Process32First");
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myProcess32Next = (PROCESSWALK)
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GetProcAddress(h, "Process32Next");
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if (!myCreateToolhelp32Snapshot || !myProcess32First || !myProcess32Next)
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return 0;
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myEnumProcesses = EnumProcessesW95;
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}
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return myEnumProcesses (lpidProcess, cb, cbneeded);
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}
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