X-Git-Url: http://sjero.net/git/?p=wget;a=blobdiff_plain;f=src%2Fmswindows.c;h=179773e05fccfd99a9d566b6385540ca0ddbc9c5;hp=d1a2a543b55cbe14b08f2d8d415f6a317109c37c;hb=HEAD;hpb=451ddf3cf9f685d8470f06bec7b90a97e7859374 diff --git a/src/mswindows.c b/src/mswindows.c index d1a2a543..179773e0 100644 --- a/src/mswindows.c +++ b/src/mswindows.c @@ -1,11 +1,13 @@ /* mswindows.c -- Windows-specific support - Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, + 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, + Inc. This file is part of GNU Wget. GNU Wget is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or +the Free Software Foundation; either version 3 of the License, or (at your option) any later version. GNU Wget is distributed in the hope that it will be useful, @@ -14,50 +16,33 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License -along with Wget; if not, write to the Free Software -Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +along with Wget. If not, see . -In addition, as a special exception, the Free Software Foundation -gives permission to link the code of its release of Wget with the -OpenSSL project's "OpenSSL" library (or with modified versions of it -that use the same license as the "OpenSSL" library), and distribute -the linked executables. You must obey the GNU General Public License -in all respects for all of the code used other than "OpenSSL". If you -modify this file, you may extend this exception to your version of the -file, but you are not obligated to do so. If you do not wish to do -so, delete this exception statement from your version. */ +Additional permission under GNU GPL version 3 section 7 -/* #### Someone please document what these functions do! */ +If you modify this program, or any covered work, by linking or +combining it with the OpenSSL project's OpenSSL library (or a +modified version of that library), containing parts covered by the +terms of the OpenSSL or SSLeay licenses, the Free Software Foundation +grants you additional permission to convey the resulting work. +Corresponding Source for a non-source form of such a combination +shall include the source code for the parts of OpenSSL used as well +as that of the covered work. */ -#include +#define INHIBIT_WRAP /* avoid wrapping of socket, bind, ... */ + +#include "wget.h" #include #include -#include #include -#include #include #include -#ifdef HACK_BCC_UTIME_BUG -# include -# include -# ifdef HAVE_UTIME_H -# include -# endif -# ifdef HAVE_SYS_UTIME_H -# include -# endif -#endif -#include "wget.h" #include "utils.h" #include "url.h" -#ifndef errno -extern int errno; -#endif - #ifndef ES_SYSTEM_REQUIRED #define ES_SYSTEM_REQUIRED 0x00000001 #endif @@ -68,45 +53,28 @@ extern int errno; /* Defined in log.c. */ -void log_request_redirect_output PARAMS ((const char *)); - -static DWORD set_sleep_mode (DWORD mode); - -static DWORD pwr_mode = 0; -static int windows_nt_p; +void log_request_redirect_output (const char *); -#ifndef HAVE_SLEEP +/* Windows version of xsleep in utils.c. */ -/* Emulation of Unix sleep. */ - -unsigned int -sleep (unsigned seconds) -{ - return SleepEx (1000 * seconds, TRUE) ? 0U : 1000 * seconds; -} -#endif - -#ifndef HAVE_USLEEP -/* Emulation of Unix usleep(). This has a granularity of - milliseconds, but that's ok because: - - a) Wget is only using it with milliseconds [not anymore, but b) - still applies]; - - b) You can't rely on usleep's granularity anyway. If a caller - expects usleep to respect every microsecond, he's in for a - surprise. */ - -int -usleep (unsigned long usec) +void +xsleep (double seconds) { - SleepEx (usec / 1000, TRUE); - return 0; +#if defined(HAVE_USLEEP) && defined(HAVE_SLEEP) + if (seconds > 1000) + { + /* Explained in utils.c. */ + sleep (seconds); + seconds -= (long) seconds; + } + usleep (seconds * 1000000); +#else /* not HAVE_USLEEP */ + SleepEx ((DWORD) (seconds * 1000 + .5), FALSE); +#endif /* not HAVE_USLEEP */ } -#endif /* HAVE_USLEEP */ void -windows_main_junk (int *argc, char **argv, char **exec_name) +windows_main (char **exec_name) { char *p; @@ -117,41 +85,256 @@ windows_main_junk (int *argc, char **argv, char **exec_name) *p = '\0'; } -/* Winsock stuff. */ - static void ws_cleanup (void) { + xfree ((char*)exec_name); WSACleanup (); - if (pwr_mode) - set_sleep_mode (pwr_mode); - pwr_mode = 0; } +#if defined(CTRLBREAK_BACKGND) || defined(CTRLC_BACKGND) static void -ws_hangup (void) +ws_hangup (const char *reason) +{ + fprintf (stderr, _("Continuing in background.\n")); + log_request_redirect_output (reason); + + /* Detach process from the current console. Under Windows 9x, if we + were launched from a 16-bit process (which is usually the case; + command.com is 16-bit) the parent process should resume right away. + Under NT or if launched from a 32-process under 9x, this is a futile + gesture as the parent will wait for us to terminate before resuming. */ + FreeConsole (); +} +#endif + +/* Construct the name for a named section (a.k.a. `file mapping') object. + The returned string is dynamically allocated and needs to be xfree()'d. */ +static char * +make_section_name (DWORD pid) { - log_request_redirect_output ("CTRL+Break"); + return aprintf ("gnu_wget_fake_fork_%lu", pid); } +/* This structure is used to hold all the data that is exchanged between + parent and child. */ +struct fake_fork_info +{ + HANDLE event; + bool logfile_changed; + char lfilename[MAX_PATH + 1]; +}; + +/* Determines if we are the child and if so performs the child logic. + Return values: + < 0 error + 0 parent + > 0 child +*/ +static int +fake_fork_child (void) +{ + HANDLE section, event; + struct fake_fork_info *info; + char *name; + + name = make_section_name (GetCurrentProcessId ()); + section = OpenFileMapping (FILE_MAP_WRITE, FALSE, name); + xfree (name); + /* It seems that Windows 9x and NT set last-error inconsistently when + OpenFileMapping() fails; so we assume it failed because the section + object does not exist. */ + if (!section) + return 0; /* We are the parent. */ + + info = MapViewOfFile (section, FILE_MAP_WRITE, 0, 0, 0); + if (!info) + { + CloseHandle (section); + return -1; + } + + event = info->event; + + info->logfile_changed = false; + if (!opt.lfilename && (!opt.quiet || opt.server_response)) + { + /* See utils:fork_to_background for explanation. */ + FILE *new_log_fp = unique_create (DEFAULT_LOGFILE, false, &opt.lfilename); + if (new_log_fp) + { + info->logfile_changed = true; + strncpy (info->lfilename, opt.lfilename, sizeof (info->lfilename)); + info->lfilename[sizeof (info->lfilename) - 1] = '\0'; + fclose (new_log_fp); + } + } + + UnmapViewOfFile (info); + CloseHandle (section); + + /* Inform the parent that we've done our part. */ + if (!SetEvent (event)) + return -1; + + CloseHandle (event); + return 1; /* We are the child. */ +} + +/* Windows doesn't support the fork() call; so we fake it by invoking + another copy of Wget with the same arguments with which we were + invoked. The child copy of Wget should perform the same initialization + sequence as the parent; so we should have two processes that are + essentially identical. We create a specially named section object that + allows the child to distinguish itself from the parent and is used to + exchange information between the two processes. We use an event object + for synchronization. */ +static void +fake_fork (void) +{ + char exe[MAX_PATH + 1]; + DWORD exe_len, le; + SECURITY_ATTRIBUTES sa; + HANDLE section, event, h[2]; + STARTUPINFO si; + PROCESS_INFORMATION pi; + struct fake_fork_info *info; + char *name; + BOOL rv; + + section = pi.hProcess = pi.hThread = NULL; + + /* Get the fully qualified name of our executable. This is more reliable + than using argv[0]. */ + exe_len = GetModuleFileName (GetModuleHandle (NULL), exe, sizeof (exe)); + if (!exe_len || (exe_len >= sizeof (exe))) + return; + + sa.nLength = sizeof (sa); + sa.lpSecurityDescriptor = NULL; + sa.bInheritHandle = TRUE; + + /* Create an anonymous inheritable event object that starts out + non-signaled. */ + event = CreateEvent (&sa, FALSE, FALSE, NULL); + if (!event) + return; + + /* Create the child process detached form the current console and in a + suspended state. */ + xzero (si); + si.cb = sizeof (si); + rv = CreateProcess (exe, GetCommandLine (), NULL, NULL, TRUE, + CREATE_SUSPENDED | DETACHED_PROCESS, + NULL, NULL, &si, &pi); + if (!rv) + goto cleanup; + + /* Create a named section object with a name based on the process id of + the child. */ + name = make_section_name (pi.dwProcessId); + section = + CreateFileMapping (INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, + sizeof (struct fake_fork_info), name); + le = GetLastError(); + xfree (name); + /* Fail if the section object already exists (should not happen). */ + if (!section || (le == ERROR_ALREADY_EXISTS)) + { + rv = FALSE; + goto cleanup; + } + + /* Copy the event handle into the section object. */ + info = MapViewOfFile (section, FILE_MAP_WRITE, 0, 0, 0); + if (!info) + { + rv = FALSE; + goto cleanup; + } + + info->event = event; + + UnmapViewOfFile (info); + + /* Start the child process. */ + rv = ResumeThread (pi.hThread); + if (!rv) + { + TerminateProcess (pi.hProcess, (DWORD) -1); + goto cleanup; + } + + /* Wait for the child to signal to us that it has done its part. If it + terminates before signaling us it's an error. */ + + h[0] = event; + h[1] = pi.hProcess; + rv = WAIT_OBJECT_0 == WaitForMultipleObjects (2, h, FALSE, 5 * 60 * 1000); + if (!rv) + goto cleanup; + + info = MapViewOfFile (section, FILE_MAP_READ, 0, 0, 0); + if (!info) + { + rv = FALSE; + goto cleanup; + } + + /* Ensure string is properly terminated. */ + if (info->logfile_changed && + !memchr (info->lfilename, '\0', sizeof (info->lfilename))) + { + rv = FALSE; + goto cleanup; + } + + printf (_("Continuing in background, pid %lu.\n"), pi.dwProcessId); + if (info->logfile_changed) + printf (_("Output will be written to %s.\n"), quote (info->lfilename)); + + UnmapViewOfFile (info); + +cleanup: + + if (event) + CloseHandle (event); + if (section) + CloseHandle (section); + if (pi.hThread) + CloseHandle (pi.hThread); + if (pi.hProcess) + CloseHandle (pi.hProcess); + + /* We're the parent. If all is well, terminate. */ + if (rv) + exit (0); + + /* We failed, return. */ +} + +/* This is the corresponding Windows implementation of the + fork_to_background() function in utils.c. */ void fork_to_background (void) { - /* Whether we arrange our own version of opt.lfilename here. */ - int changedp = 0; + int rv; - if (!opt.lfilename) + rv = fake_fork_child (); + if (rv < 0) { - opt.lfilename = unique_name (DEFAULT_LOGFILE, 0); - changedp = 1; + fprintf (stderr, _("fake_fork_child() failed\n")); + abort (); } - printf (_("Continuing in background.\n")); - if (changedp) - printf (_("Output will be written to `%s'.\n"), opt.lfilename); - - ws_hangup (); - if (!windows_nt_p) - FreeConsole (); + else if (rv == 0) + { + /* We're the parent. */ + fake_fork (); + /* If fake_fork() returns, it failed. */ + fprintf (stderr, _("fake_fork() failed\n")); + abort (); + } + /* If we get here, we're the child. */ } static BOOL WINAPI @@ -161,183 +344,311 @@ ws_handler (DWORD dwEvent) { #ifdef CTRLC_BACKGND case CTRL_C_EVENT: + ws_hangup ("CTRL+C"); + return TRUE; #endif #ifdef CTRLBREAK_BACKGND case CTRL_BREAK_EVENT: + ws_hangup ("CTRL+Break"); + return TRUE; #endif - fork_to_background (); - break; - case CTRL_SHUTDOWN_EVENT: - case CTRL_CLOSE_EVENT: - case CTRL_LOGOFF_EVENT: default: - ws_cleanup (); return FALSE; } - return TRUE; } static char *title_buf = NULL; static char *curr_url = NULL; -static int num_urls = 0; +static int old_percentage = -1; +/* Updates the console title with the URL of the current file being + transferred. */ void -ws_changetitle (const char *url, int nurl) +ws_changetitle (const char *url) { - if (!nurl) - return; - - num_urls = nurl; - if (title_buf) - xfree(title_buf); - if (curr_url) - xfree(curr_url); - title_buf = (char *)xmalloc (strlen (url) + 20); - curr_url = xstrdup(url); - sprintf(title_buf, "Wget %s%s", url, nurl == 1 ? "" : " ..."); - SetConsoleTitle(title_buf); + xfree_null (title_buf); + xfree_null (curr_url); + title_buf = xmalloc (strlen (url) + 20); + curr_url = xstrdup (url); + old_percentage = -1; + sprintf (title_buf, "Wget %s", curr_url); + SetConsoleTitle (title_buf); } +/* Updates the console title with the percentage of the current file + transferred. */ void -ws_percenttitle (double percent) +ws_percenttitle (double percentage_float) { - if (num_urls == 1 && title_buf && curr_url && fabs(percent) <= 100.0) - { - sprintf (title_buf, "Wget [%.1f%%] %s", percent, curr_url); - SetConsoleTitle (title_buf); - } + int percentage; + + if (!title_buf || !curr_url) + return; + + percentage = (int) percentage_float; + + /* Clamp percentage value. */ + if (percentage < 0) + percentage = 0; + if (percentage > 100) + percentage = 100; + + /* Only update the title when the percentage has changed. */ + if (percentage == old_percentage) + return; + + old_percentage = percentage; + + sprintf (title_buf, "Wget [%d%%] %s", percentage, curr_url); + SetConsoleTitle (title_buf); } +/* Returns a pointer to the fully qualified name of the directory that + contains the Wget binary (wget.exe). The returned path does not have a + trailing path separator. Returns NULL on failure. */ char * ws_mypath (void) { static char *wspathsave = NULL; - char buffer[MAX_PATH]; - char *ptr; - if (wspathsave) + if (!wspathsave) { - return wspathsave; - } + char buf[MAX_PATH + 1]; + char *p; + DWORD len; - if (GetModuleFileName (NULL, buffer, MAX_PATH) && - (ptr = strrchr (buffer, PATH_SEPARATOR)) != NULL) - { - *(ptr + 1) = '\0'; - wspathsave = xstrdup (buffer); + len = GetModuleFileName (GetModuleHandle (NULL), buf, sizeof (buf)); + if (!len || (len >= sizeof (buf))) + return NULL; + + p = strrchr (buf, PATH_SEPARATOR); + if (!p) + return NULL; + + *p = '\0'; + wspathsave = xstrdup (buf); } - else - wspathsave = NULL; + return wspathsave; } -void -ws_help (const char *name) +/* Prevent Windows entering sleep/hibernation-mode while Wget is doing + a lengthy transfer. Windows does not, by default, consider network + activity in console-programs as activity! Works on Win-98/ME/2K + and up. */ +static void +set_sleep_mode (void) { - char *mypath = ws_mypath (); + typedef DWORD (WINAPI *func_t) (DWORD); + func_t set_exec_state; - if (mypath) - { - struct stat sbuf; - char *buf = (char *)alloca (strlen (mypath) + strlen (name) + 4 + 1); - sprintf (buf, "%s%s.HLP", mypath, name); - if (stat (buf, &sbuf) == 0) - { - printf (_("Starting WinHelp %s\n"), buf); - WinHelp (NULL, buf, HELP_INDEX, NULL); - } - else - { - printf ("%s: %s\n", buf, strerror (errno)); - } - } + set_exec_state = + (func_t) GetProcAddress (GetModuleHandle ("KERNEL32.DLL"), + "SetThreadExecutionState"); + + if (set_exec_state) + set_exec_state (ES_SYSTEM_REQUIRED | ES_CONTINUOUS); } +/* Perform Windows specific initialization. */ void ws_startup (void) { - WORD requested; WSADATA data; - int err; - OSVERSIONINFO os; - - if (GetVersionEx (&os) == TRUE - && os.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) - windows_nt_p = 1; - - requested = MAKEWORD (1, 1); - err = WSAStartup (requested, &data); - + WORD requested = MAKEWORD (1, 1); + int err = WSAStartup (requested, &data); if (err != 0) { fprintf (stderr, _("%s: Couldn't find usable socket driver.\n"), - exec_name); + exec_name); exit (1); } if (data.wVersion < requested) { fprintf (stderr, _("%s: Couldn't find usable socket driver.\n"), - exec_name); + exec_name); WSACleanup (); exit (1); } + atexit (ws_cleanup); - pwr_mode = set_sleep_mode (0); + set_sleep_mode (); SetConsoleCtrlHandler (ws_handler, TRUE); } + +/* run_with_timeout Windows implementation. */ -/* Replacement utime function for buggy Borland C++Builder 5.5 compiler. - (The Borland utime function only works on Windows NT.) */ +/* Stack size 0 uses default thread stack-size (reserve+commit). + Determined by what's in the PE header. */ +#define THREAD_STACK_SIZE 0 -#ifdef HACK_BCC_UTIME_BUG -int borland_utime(const char *path, const struct utimbuf *times) +struct thread_data { - int fd; - int res; - struct ftime ft; - struct tm *ptr_tm; + void (*fun) (void *); + void *arg; + DWORD ws_error; +}; + +/* The callback that runs FUN(ARG) in a separate thread. This + function exists for two reasons: a) to not require FUN to be + declared WINAPI/__stdcall[1], and b) to retrieve Winsock errors, + which are per-thread. The latter is useful when FUN calls Winsock + functions, which is how run_with_timeout is used in Wget. + + [1] MSVC can use __fastcall globally (cl /Gr) and on Watcom this is + the default (wcc386 -3r). */ + +static DWORD WINAPI +thread_helper (void *arg) +{ + struct thread_data *td = (struct thread_data *) arg; - if ((fd = open (path, O_RDWR)) < 0) - return -1; + /* Initialize Winsock error to what it was in the parent. That way + the subsequent call to WSAGetLastError will return the same value + if td->fun doesn't change Winsock error state. */ + WSASetLastError (td->ws_error); - ptr_tm = localtime (×->modtime); - ft.ft_tsec = ptr_tm->tm_sec >> 1; - ft.ft_min = ptr_tm->tm_min; - ft.ft_hour = ptr_tm->tm_hour; - ft.ft_day = ptr_tm->tm_mday; - ft.ft_month = ptr_tm->tm_mon + 1; - ft.ft_year = ptr_tm->tm_year - 80; - res = setftime (fd, &ft); - close (fd); - return res; + td->fun (td->arg); + + /* Return Winsock error to the caller, in case FUN ran Winsock + code. */ + td->ws_error = WSAGetLastError (); + return 0; } -#endif -/* - * Prevent Windows entering sleep/hibernation-mode while wget is doing a lengthy transfer. - * Windows does by default not consider network activity in console-programs as activity ! - * Works on Win-98/ME/2K and up. - */ -static -DWORD set_sleep_mode (DWORD mode) +/* Call FUN(ARG), but don't allow it to run for more than TIMEOUT + seconds. Returns true if the function was interrupted with a + timeout, false otherwise. + + This works by running FUN in a separate thread and terminating the + thread if it doesn't finish in the specified time. */ + +bool +run_with_timeout (double seconds, void (*fun) (void *), void *arg) { - HMODULE mod = LoadLibrary ("kernel32.dll"); - DWORD (*_SetThreadExecutionState) (DWORD) = NULL; - DWORD rc = (DWORD)-1; + HANDLE thread_hnd; + struct thread_data thread_arg; + DWORD thread_id; + bool rc; + + DEBUGP (("seconds %.2f, ", seconds)); + + if (seconds == 0) + { + blocking_fallback: + fun (arg); + return false; + } - if (mod) - (void*)_SetThreadExecutionState = GetProcAddress ((HINSTANCE)mod, "SetThreadExecutionState"); + thread_arg.fun = fun; + thread_arg.arg = arg; + thread_arg.ws_error = WSAGetLastError (); + thread_hnd = CreateThread (NULL, THREAD_STACK_SIZE, thread_helper, + &thread_arg, 0, &thread_id); + if (!thread_hnd) + { + DEBUGP (("CreateThread() failed; [%#lx]\n", + (unsigned long) GetLastError ())); + goto blocking_fallback; + } - if (_SetThreadExecutionState) + if (WaitForSingleObject (thread_hnd, (DWORD)(1000 * seconds)) + == WAIT_OBJECT_0) { - if (mode == 0) /* first time */ - mode = (ES_SYSTEM_REQUIRED | ES_CONTINUOUS); - rc = (*_SetThreadExecutionState) (mode); + /* Propagate error state (which is per-thread) to this thread, + so the caller can inspect it. */ + WSASetLastError (thread_arg.ws_error); + DEBUGP (("Winsock error: %d\n", WSAGetLastError ())); + rc = false; } - if (mod) - FreeLibrary (mod); - DEBUGP (("set_sleep_mode(): mode 0x%08lX, rc 0x%08lX\n", mode, rc)); - return (rc); + else + { + TerminateThread (thread_hnd, 1); + rc = true; + } + + CloseHandle (thread_hnd); /* Clear-up after TerminateThread(). */ + thread_hnd = NULL; + return rc; } + +#ifdef ENABLE_IPV6 +/* An inet_ntop implementation that uses WSAAddressToString. + Prototype complies with POSIX 1003.1-2004. This is only used under + IPv6 because Wget prints IPv4 addresses using inet_ntoa. */ + +const char * +inet_ntop (int af, const void *src, char *dst, socklen_t cnt) +{ + /* struct sockaddr can't accomodate struct sockaddr_in6. */ + union { + struct sockaddr_in6 sin6; + struct sockaddr_in sin; + } sa; + DWORD dstlen = cnt; + size_t srcsize; + + xzero (sa); + switch (af) + { + case AF_INET: + sa.sin.sin_family = AF_INET; + sa.sin.sin_addr = *(struct in_addr *) src; + srcsize = sizeof (sa.sin); + break; + case AF_INET6: + sa.sin6.sin6_family = AF_INET6; + sa.sin6.sin6_addr = *(struct in6_addr *) src; + srcsize = sizeof (sa.sin6); + break; + default: + abort (); + } + + if (WSAAddressToString ((struct sockaddr *) &sa, srcsize, NULL, dst, &dstlen) != 0) + { + errno = WSAGetLastError(); + return NULL; + } + return (const char *) dst; +} +#endif + + +void +set_windows_fd_as_blocking_socket (int fd) +{ + /* 04/2011 + gnulib select() converts blocking sockets to nonblocking in windows + discussed here: + http://old.nabble.com/blocking-socket-is-nonblocking-after-calling-gnulib- + select%28%29-in-windows-td31432857.html + + wget uses blocking sockets so we must convert them back to blocking. + */ + int ret = 0; + int wsagle = 0; + const int zero = 0; + + do + { + if(wsagle == WSAEINPROGRESS) + Sleep(1); /* use windows sleep */ + + WSASetLastError (0); + ret = ioctl (fd, FIONBIO, &zero); + wsagle = WSAGetLastError (); + } + while (ret && (wsagle == WSAEINPROGRESS)); + + if(ret) + { + fprintf (stderr, + _("ioctl() failed. The socket could not be set as blocking.\n") ); + DEBUGP (("Winsock error: %d\n", WSAGetLastError ())); + abort (); + } + return; +}