331 lines
7.3 KiB
C++
331 lines
7.3 KiB
C++
/* external.cc: Interface to Cygwin internals from external programs.
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Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Red Hat, Inc.
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Written by Christopher Faylor <cgf@cygnus.com>
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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 "winsup.h"
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#include "security.h"
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#include "sigproc.h"
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#include "pinfo.h"
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#include <exceptions.h>
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#include "shared_info.h"
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#include "cygwin_version.h"
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#include "perprocess.h"
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#include "cygerrno.h"
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "wincap.h"
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#include "heap.h"
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#include "pwdgrp.h"
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#include "cygtls.h"
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#include "child_info.h"
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void *hook_cygwin (const char *, const void *);
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child_info *get_cygwin_startup_info ();
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static winpids pids;
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static external_pinfo *
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fillout_pinfo (pid_t pid, int winpid)
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{
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BOOL nextpid;
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static external_pinfo ep;
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if ((nextpid = !!(pid & CW_NEXTPID)))
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pid ^= CW_NEXTPID;
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static unsigned int i;
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if (!pids.npids || !nextpid)
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{
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pids.set (winpid);
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i = 0;
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}
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if (!pid)
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i = 0;
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memset (&ep, 0, sizeof ep);
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while (i < pids.npids)
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{
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DWORD thispid = pids.winpid (i);
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_pinfo *p = pids[i];
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i++;
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if (!p)
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{
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if (!nextpid && thispid != (DWORD) pid)
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continue;
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ep.pid = cygwin_pid (thispid);
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ep.dwProcessId = thispid;
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ep.process_state = PID_IN_USE;
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ep.ctty = -1;
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break;
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}
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else if (nextpid || p->pid == pid || (winpid && thispid == (DWORD) pid))
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{
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ep.ctty = p->ctty;
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ep.pid = p->pid;
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ep.ppid = p->ppid;
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ep.dwProcessId = p->dwProcessId;
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ep.uid = p->uid;
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ep.gid = p->gid;
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ep.pgid = p->pgid;
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ep.sid = p->sid;
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ep.umask = 0;
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ep.start_time = p->start_time;
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ep.rusage_self = p->rusage_self;
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ep.rusage_children = p->rusage_children;
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strcpy (ep.progname, p->progname);
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ep.strace_mask = 0;
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ep.version = EXTERNAL_PINFO_VERSION;
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ep.process_state = p->process_state;
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ep.uid32 = p->uid;
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ep.gid32 = p->gid;
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break;
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}
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}
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if (!ep.pid)
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{
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i = 0;
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pids.reset ();
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return 0;
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}
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return &ep;
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}
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static DWORD
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get_cygdrive_info (char *user, char *system, char *user_flags,
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char *system_flags)
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{
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int res = mount_table->get_cygdrive_info (user, system, user_flags,
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system_flags);
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return (res == ERROR_SUCCESS) ? 1 : 0;
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}
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static DWORD
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get_cygdrive_prefixes (char *user, char *system)
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{
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char user_flags[CYG_MAX_PATH];
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char system_flags[CYG_MAX_PATH];
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DWORD res = get_cygdrive_info (user, system, user_flags, system_flags);
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return res;
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}
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static DWORD
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check_ntsec (const char *filename)
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{
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if (!filename)
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return allow_ntsec;
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path_conv pc (filename);
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return allow_ntsec && pc.has_acls ();
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}
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extern "C" unsigned long
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cygwin_internal (cygwin_getinfo_types t, ...)
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{
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va_list arg;
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va_start (arg, t);
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switch (t)
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{
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case CW_LOCK_PINFO:
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return 1;
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case CW_UNLOCK_PINFO:
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return 1;
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case CW_GETTHREADNAME:
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return (DWORD) cygthread::name (va_arg (arg, DWORD));
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case CW_SETTHREADNAME:
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{
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set_errno (ENOSYS);
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return 0;
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}
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case CW_GETPINFO:
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return (DWORD) fillout_pinfo (va_arg (arg, DWORD), 0);
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case CW_GETVERSIONINFO:
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return (DWORD) cygwin_version_strings;
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case CW_READ_V1_MOUNT_TABLES:
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set_errno (ENOSYS);
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return 1;
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case CW_USER_DATA:
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return (DWORD) &__cygwin_user_data;
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case CW_PERFILE:
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perfile_table = va_arg (arg, struct __cygwin_perfile *);
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return 0;
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case CW_GET_CYGDRIVE_PREFIXES:
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{
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char *user = va_arg (arg, char *);
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char *system = va_arg (arg, char *);
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return get_cygdrive_prefixes (user, system);
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}
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case CW_GETPINFO_FULL:
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return (DWORD) fillout_pinfo (va_arg (arg, pid_t), 1);
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case CW_INIT_EXCEPTIONS:
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init_exceptions (va_arg (arg, exception_list *));
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return 0;
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case CW_GET_CYGDRIVE_INFO:
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{
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char *user = va_arg (arg, char *);
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char *system = va_arg (arg, char *);
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char *user_flags = va_arg (arg, char *);
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char *system_flags = va_arg (arg, char *);
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return get_cygdrive_info (user, system, user_flags, system_flags);
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}
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case CW_SET_CYGWIN_REGISTRY_NAME:
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{
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const char *cr = va_arg (arg, char *);
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if (check_null_empty_str_errno (cr))
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return (DWORD) NULL;
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cygheap->cygwin_regname = (char *) crealloc (cygheap->cygwin_regname,
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strlen (cr) + 1);
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strcpy (cygheap->cygwin_regname, cr);
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}
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case CW_GET_CYGWIN_REGISTRY_NAME:
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return (DWORD) cygheap->cygwin_regname;
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case CW_STRACE_TOGGLE:
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{
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pid_t pid = va_arg (arg, pid_t);
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pinfo p (pid);
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if (p)
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{
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sig_send (p, __SIGSTRACE);
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return 0;
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}
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else
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{
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set_errno (ESRCH);
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return (DWORD) -1;
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}
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}
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case CW_STRACE_ACTIVE:
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{
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return strace.active;
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}
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case CW_CYGWIN_PID_TO_WINPID:
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{
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pinfo p (va_arg (arg, pid_t));
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return p ? p->dwProcessId : 0;
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}
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case CW_EXTRACT_DOMAIN_AND_USER:
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{
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struct passwd *pw = va_arg (arg, struct passwd *);
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char *domain = va_arg (arg, char *);
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char *user = va_arg (arg, char *);
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extract_nt_dom_user (pw, domain, user);
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return 0;
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}
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case CW_CMDLINE:
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{
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size_t n;
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pid_t pid = va_arg (arg, pid_t);
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pinfo p (pid);
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return (DWORD) p->cmdline (n);
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}
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case CW_CHECK_NTSEC:
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{
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char *filename = va_arg (arg, char *);
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return check_ntsec (filename);
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}
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case CW_GET_ERRNO_FROM_WINERROR:
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{
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int error = va_arg (arg, int);
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int deferrno = va_arg (arg, int);
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return geterrno_from_win_error (error, deferrno);
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}
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case CW_GET_POSIX_SECURITY_ATTRIBUTE:
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{
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security_descriptor sd;
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int attribute = va_arg (arg, int);
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PSECURITY_ATTRIBUTES psa = va_arg (arg, PSECURITY_ATTRIBUTES);
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void *sd_buf = va_arg (arg, void *);
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DWORD sd_buf_size = va_arg (arg, DWORD);
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set_security_attribute (attribute, psa, sd);
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if (!psa->lpSecurityDescriptor || sd.size () > sd_buf_size)
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return sd.size ();
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memcpy (sd_buf, sd, sd.size ());
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psa->lpSecurityDescriptor = sd_buf;
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return 0;
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}
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case CW_GET_SHMLBA:
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{
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return getshmlba ();
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}
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case CW_GET_UID_FROM_SID:
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{
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PSID psid = va_arg (arg, PSID);
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cygsid sid (psid);
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struct passwd *pw = internal_getpwsid (sid);
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return pw ? pw->pw_uid : (__uid32_t)-1;
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}
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case CW_GET_GID_FROM_SID:
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{
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PSID psid = va_arg (arg, PSID);
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cygsid sid (psid);
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struct __group32 *gr = internal_getgrsid (sid);
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return gr ? gr->gr_gid : (__gid32_t)-1;
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}
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case CW_GET_BINMODE:
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{
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const char *path = va_arg (arg, const char *);
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path_conv p (path, PC_SYM_FOLLOW | PC_NULLEMPTY);
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if (p.error)
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{
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set_errno (p.error);
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return (unsigned long) -1;
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}
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return p.binmode ();
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}
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case CW_HOOK:
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{
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const char *name = va_arg (arg, const char *);
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const void *hookfn = va_arg (arg, const void *);
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return (unsigned long) hook_cygwin (name, hookfn);
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}
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case CW_ARGV:
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{
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child_info_spawn *ci = (child_info_spawn *) get_cygwin_startup_info ();
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return (unsigned long) (ci ? ci->moreinfo->argv : NULL);
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}
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case CW_ENVP:
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{
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child_info_spawn *ci = (child_info_spawn *) get_cygwin_startup_info ();
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return (unsigned long) (ci ? ci->moreinfo->envp : NULL);
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}
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case CW_DEBUG_SELF:
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error_start_init (va_arg (arg, const char *));
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try_to_debug ();
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break;
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default:
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break;
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}
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return (unsigned long) -1;
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}
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