| /* Utilities to execute a program in a subprocess (possibly linked by pipes |
| with other subprocesses), and wait for it. Generic Win32 specialization. |
| Copyright (C) 1996-2019 Free Software Foundation, Inc. |
| |
| This file is part of the libiberty library. |
| Libiberty is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| Libiberty is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with libiberty; see the file COPYING.LIB. If not, |
| write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include "pex-common.h" |
| |
| #include <windows.h> |
| |
| #ifdef HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| #ifdef HAVE_STRING_H |
| #include <string.h> |
| #endif |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| #ifdef HAVE_SYS_WAIT_H |
| #include <sys/wait.h> |
| #endif |
| |
| #include <assert.h> |
| #include <process.h> |
| #include <io.h> |
| #include <fcntl.h> |
| #include <signal.h> |
| #include <sys/stat.h> |
| #include <errno.h> |
| #include <ctype.h> |
| |
| /* mingw32 headers may not define the following. */ |
| |
| #ifndef _P_WAIT |
| # define _P_WAIT 0 |
| # define _P_NOWAIT 1 |
| # define _P_OVERLAY 2 |
| # define _P_NOWAITO 3 |
| # define _P_DETACH 4 |
| |
| # define WAIT_CHILD 0 |
| # define WAIT_GRANDCHILD 1 |
| #endif |
| |
| #define MINGW_NAME "Minimalist GNU for Windows" |
| #define MINGW_NAME_LEN (sizeof(MINGW_NAME) - 1) |
| |
| extern char *stpcpy (char *dst, const char *src); |
| |
| /* Ensure that the executable pathname uses Win32 backslashes. This |
| is not necessary on NT, but on W9x, forward slashes causes |
| failure of spawn* and exec* functions (and probably any function |
| that calls CreateProcess) *iff* the executable pathname (argv[0]) |
| is a quoted string. And quoting is necessary in case a pathname |
| contains embedded white space. You can't win. */ |
| static void |
| backslashify (char *s) |
| { |
| while ((s = strchr (s, '/')) != NULL) |
| *s = '\\'; |
| return; |
| } |
| |
| static int pex_win32_open_read (struct pex_obj *, const char *, int); |
| static int pex_win32_open_write (struct pex_obj *, const char *, int, int); |
| static pid_t pex_win32_exec_child (struct pex_obj *, int, const char *, |
| char * const *, char * const *, |
| int, int, int, int, |
| const char **, int *); |
| static int pex_win32_close (struct pex_obj *, int); |
| static pid_t pex_win32_wait (struct pex_obj *, pid_t, int *, |
| struct pex_time *, int, const char **, int *); |
| static int pex_win32_pipe (struct pex_obj *, int *, int); |
| static FILE *pex_win32_fdopenr (struct pex_obj *, int, int); |
| static FILE *pex_win32_fdopenw (struct pex_obj *, int, int); |
| |
| /* The list of functions we pass to the common routines. */ |
| |
| const struct pex_funcs funcs = |
| { |
| pex_win32_open_read, |
| pex_win32_open_write, |
| pex_win32_exec_child, |
| pex_win32_close, |
| pex_win32_wait, |
| pex_win32_pipe, |
| pex_win32_fdopenr, |
| pex_win32_fdopenw, |
| NULL /* cleanup */ |
| }; |
| |
| /* Return a newly initialized pex_obj structure. */ |
| |
| struct pex_obj * |
| pex_init (int flags, const char *pname, const char *tempbase) |
| { |
| return pex_init_common (flags, pname, tempbase, &funcs); |
| } |
| |
| /* Open a file for reading. */ |
| |
| static int |
| pex_win32_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name, |
| int binary) |
| { |
| return _open (name, _O_RDONLY | (binary ? _O_BINARY : _O_TEXT)); |
| } |
| |
| /* Open a file for writing. */ |
| |
| static int |
| pex_win32_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED, const char *name, |
| int binary, int append) |
| { |
| /* Note that we can't use O_EXCL here because gcc may have already |
| created the temporary file via make_temp_file. */ |
| if (append) |
| return -1; |
| return _open (name, |
| (_O_WRONLY | _O_CREAT | _O_TRUNC |
| | (binary ? _O_BINARY : _O_TEXT)), |
| _S_IREAD | _S_IWRITE); |
| } |
| |
| /* Close a file. */ |
| |
| static int |
| pex_win32_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd) |
| { |
| return _close (fd); |
| } |
| |
| #ifdef USE_MINGW_MSYS |
| static const char *mingw_keys[] = {"SOFTWARE", "Microsoft", "Windows", "CurrentVersion", "Uninstall", NULL}; |
| |
| /* Tack the executable on the end of a (possibly slash terminated) buffer |
| and convert everything to \. */ |
| static const char * |
| tack_on_executable (char *buf, const char *executable) |
| { |
| char *p = strchr (buf, '\0'); |
| if (p > buf && (p[-1] == '\\' || p[-1] == '/')) |
| p[-1] = '\0'; |
| backslashify (strcat (buf, executable)); |
| return buf; |
| } |
| |
| /* Walk down a registry hierarchy until the end. Return the key. */ |
| static HKEY |
| openkey (HKEY hStart, const char *keys[]) |
| { |
| HKEY hKey, hTmp; |
| for (hKey = hStart; *keys; keys++) |
| { |
| LONG res; |
| hTmp = hKey; |
| res = RegOpenKey (hTmp, *keys, &hKey); |
| |
| if (hTmp != HKEY_LOCAL_MACHINE) |
| RegCloseKey (hTmp); |
| |
| if (res != ERROR_SUCCESS) |
| return NULL; |
| } |
| return hKey; |
| } |
| |
| /* Return the "mingw root" as derived from the mingw uninstall information. */ |
| static const char * |
| mingw_rootify (const char *executable) |
| { |
| HKEY hKey, hTmp; |
| DWORD maxlen; |
| char *namebuf, *foundbuf; |
| DWORD i; |
| LONG res; |
| |
| /* Open the uninstall "directory". */ |
| hKey = openkey (HKEY_LOCAL_MACHINE, mingw_keys); |
| |
| /* Not found. */ |
| if (!hKey) |
| return executable; |
| |
| /* Need to enumerate all of the keys here looking for one the most recent |
| one for MinGW. */ |
| if (RegQueryInfoKey (hKey, NULL, NULL, NULL, NULL, &maxlen, NULL, NULL, |
| NULL, NULL, NULL, NULL) != ERROR_SUCCESS) |
| { |
| RegCloseKey (hKey); |
| return executable; |
| } |
| namebuf = XNEWVEC (char, ++maxlen); |
| foundbuf = XNEWVEC (char, maxlen); |
| foundbuf[0] = '\0'; |
| if (!namebuf || !foundbuf) |
| { |
| RegCloseKey (hKey); |
| free (namebuf); |
| free (foundbuf); |
| return executable; |
| } |
| |
| /* Look through all of the keys for one that begins with Minimal GNU... |
| Try to get the latest version by doing a string compare although that |
| string never really works with version number sorting. */ |
| for (i = 0; RegEnumKey (hKey, i, namebuf, maxlen) == ERROR_SUCCESS; i++) |
| { |
| int match = strcasecmp (namebuf, MINGW_NAME); |
| if (match < 0) |
| continue; |
| if (match > 0 && strncasecmp (namebuf, MINGW_NAME, MINGW_NAME_LEN) > 0) |
| continue; |
| if (strcasecmp (namebuf, foundbuf) > 0) |
| strcpy (foundbuf, namebuf); |
| } |
| free (namebuf); |
| |
| /* If foundbuf is empty, we didn't find anything. Punt. */ |
| if (!foundbuf[0]) |
| { |
| free (foundbuf); |
| RegCloseKey (hKey); |
| return executable; |
| } |
| |
| /* Open the key that we wanted */ |
| res = RegOpenKey (hKey, foundbuf, &hTmp); |
| RegCloseKey (hKey); |
| free (foundbuf); |
| |
| /* Don't know why this would fail, but you gotta check */ |
| if (res != ERROR_SUCCESS) |
| return executable; |
| |
| maxlen = 0; |
| /* Get the length of the value pointed to by InstallLocation */ |
| if (RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, NULL, |
| &maxlen) != ERROR_SUCCESS || maxlen == 0) |
| { |
| RegCloseKey (hTmp); |
| return executable; |
| } |
| |
| /* Allocate space for the install location */ |
| foundbuf = XNEWVEC (char, maxlen + strlen (executable)); |
| if (!foundbuf) |
| { |
| free (foundbuf); |
| RegCloseKey (hTmp); |
| } |
| |
| /* Read the install location into the buffer */ |
| res = RegQueryValueEx (hTmp, "InstallLocation", 0, NULL, (LPBYTE) foundbuf, |
| &maxlen); |
| RegCloseKey (hTmp); |
| if (res != ERROR_SUCCESS) |
| { |
| free (foundbuf); |
| return executable; |
| } |
| |
| /* Concatenate the install location and the executable, turn all slashes |
| to backslashes, and return that. */ |
| return tack_on_executable (foundbuf, executable); |
| } |
| |
| /* Read the install location of msys from it's installation file and |
| rootify the executable based on that. */ |
| static const char * |
| msys_rootify (const char *executable) |
| { |
| size_t bufsize = 64; |
| size_t execlen = strlen (executable) + 1; |
| char *buf; |
| DWORD res = 0; |
| for (;;) |
| { |
| buf = XNEWVEC (char, bufsize + execlen); |
| if (!buf) |
| break; |
| res = GetPrivateProfileString ("InstallSettings", "InstallPath", NULL, |
| buf, bufsize, "msys.ini"); |
| if (!res) |
| break; |
| if (strlen (buf) < bufsize) |
| break; |
| res = 0; |
| free (buf); |
| bufsize *= 2; |
| if (bufsize > 65536) |
| { |
| buf = NULL; |
| break; |
| } |
| } |
| |
| if (res) |
| return tack_on_executable (buf, executable); |
| |
| /* failed */ |
| free (buf); |
| return executable; |
| } |
| #endif |
| |
| /* Return the number of arguments in an argv array, not including the null |
| terminating argument. */ |
| |
| static int |
| argv_to_argc (char *const *argv) |
| { |
| char *const *i = argv; |
| while (*i) |
| i++; |
| return i - argv; |
| } |
| |
| /* Return a Windows command-line from ARGV. It is the caller's |
| responsibility to free the string returned. */ |
| |
| static char * |
| argv_to_cmdline (char *const *argv) |
| { |
| char *cmdline; |
| char *p; |
| size_t cmdline_len; |
| int i, j, k; |
| int needs_quotes; |
| |
| cmdline_len = 0; |
| for (i = 0; argv[i]; i++) |
| { |
| /* We only quote arguments that contain spaces, \t or " characters to |
| prevent wasting 2 chars per argument of the CreateProcess 32k char |
| limit. We need only escape embedded double-quotes and immediately |
| preceeding backslash characters. A sequence of backslach characters |
| that is not follwed by a double quote character will not be |
| escaped. */ |
| needs_quotes = 0; |
| for (j = 0; argv[i][j]; j++) |
| { |
| if (argv[i][j] == ' ' || argv[i][j] == '\t' || argv[i][j] == '"') |
| { |
| needs_quotes = 1; |
| } |
| |
| if (argv[i][j] == '"') |
| { |
| /* Escape preceeding backslashes. */ |
| for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) |
| cmdline_len++; |
| /* Escape the qote character. */ |
| cmdline_len++; |
| } |
| } |
| if (j == 0) |
| needs_quotes = 1; |
| /* Trailing backslashes also need to be escaped because they will be |
| followed by the terminating quote. */ |
| if (needs_quotes) |
| { |
| for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) |
| cmdline_len++; |
| } |
| cmdline_len += j; |
| /* for leading and trailing quotes and space */ |
| cmdline_len += needs_quotes * 2 + 1; |
| } |
| cmdline = XNEWVEC (char, cmdline_len); |
| p = cmdline; |
| for (i = 0; argv[i]; i++) |
| { |
| needs_quotes = 0; |
| for (j = 0; argv[i][j]; j++) |
| { |
| if (argv[i][j] == ' ' || argv[i][j] == '\t' || argv[i][j] == '"') |
| { |
| needs_quotes = 1; |
| break; |
| } |
| } |
| if (j == 0) |
| needs_quotes = 1; |
| |
| if (needs_quotes) |
| { |
| *p++ = '"'; |
| } |
| for (j = 0; argv[i][j]; j++) |
| { |
| if (argv[i][j] == '"') |
| { |
| for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) |
| *p++ = '\\'; |
| *p++ = '\\'; |
| } |
| *p++ = argv[i][j]; |
| } |
| if (needs_quotes) |
| { |
| for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--) |
| *p++ = '\\'; |
| *p++ = '"'; |
| } |
| *p++ = ' '; |
| } |
| p[-1] = '\0'; |
| return cmdline; |
| } |
| |
| /* We'll try the passed filename with all the known standard |
| extensions, and then without extension. We try no extension |
| last so that we don't try to run some random extension-less |
| file that might be hanging around. We try both extension |
| and no extension so that we don't need any fancy logic |
| to determine if a file has extension. */ |
| static const char *const |
| std_suffixes[] = { |
| ".com", |
| ".exe", |
| ".bat", |
| ".cmd", |
| "", |
| 0 |
| }; |
| |
| /* Returns the full path to PROGRAM. If SEARCH is true, look for |
| PROGRAM in each directory in PATH. */ |
| |
| static char * |
| find_executable (const char *program, BOOL search) |
| { |
| char *full_executable; |
| char *e; |
| size_t fe_len; |
| const char *path = 0; |
| const char *const *ext; |
| const char *p, *q; |
| size_t proglen = strlen (program); |
| int has_slash = (strchr (program, '/') || strchr (program, '\\')); |
| HANDLE h; |
| |
| if (has_slash) |
| search = FALSE; |
| |
| if (search) |
| path = getenv ("PATH"); |
| if (!path) |
| path = ""; |
| |
| fe_len = 0; |
| for (p = path; *p; p = q) |
| { |
| q = p; |
| while (*q != ';' && *q != '\0') |
| q++; |
| if ((size_t)(q - p) > fe_len) |
| fe_len = q - p; |
| if (*q == ';') |
| q++; |
| } |
| fe_len = fe_len + 1 + proglen + 5 /* space for extension */; |
| full_executable = XNEWVEC (char, fe_len); |
| |
| p = path; |
| do |
| { |
| q = p; |
| while (*q != ';' && *q != '\0') |
| q++; |
| |
| e = full_executable; |
| memcpy (e, p, q - p); |
| e += (q - p); |
| if (q - p) |
| *e++ = '\\'; |
| strcpy (e, program); |
| |
| if (*q == ';') |
| q++; |
| |
| for (e = full_executable; *e; e++) |
| if (*e == '/') |
| *e = '\\'; |
| |
| /* At this point, e points to the terminating NUL character for |
| full_executable. */ |
| for (ext = std_suffixes; *ext; ext++) |
| { |
| /* Remove any current extension. */ |
| *e = '\0'; |
| /* Add the new one. */ |
| strcat (full_executable, *ext); |
| |
| /* Attempt to open this file. */ |
| h = CreateFile (full_executable, GENERIC_READ, |
| FILE_SHARE_READ | FILE_SHARE_WRITE, |
| 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); |
| if (h != INVALID_HANDLE_VALUE) |
| goto found; |
| } |
| p = q; |
| } |
| while (*p); |
| free (full_executable); |
| return 0; |
| |
| found: |
| CloseHandle (h); |
| return full_executable; |
| } |
| |
| /* Low-level process creation function and helper. */ |
| |
| static int |
| env_compare (const void *a_ptr, const void *b_ptr) |
| { |
| const char *a; |
| const char *b; |
| unsigned char c1; |
| unsigned char c2; |
| |
| a = *(const char **) a_ptr; |
| b = *(const char **) b_ptr; |
| |
| /* a and b will be of the form: VAR=VALUE |
| We compare only the variable name part here using a case-insensitive |
| comparison algorithm. It might appear that in fact strcasecmp () can |
| take the place of this whole function, and indeed it could, save for |
| the fact that it would fail in cases such as comparing A1=foo and |
| A=bar (because 1 is less than = in the ASCII character set). |
| (Environment variables containing no numbers would work in such a |
| scenario.) */ |
| |
| do |
| { |
| c1 = (unsigned char) tolower (*a++); |
| c2 = (unsigned char) tolower (*b++); |
| |
| if (c1 == '=') |
| c1 = '\0'; |
| |
| if (c2 == '=') |
| c2 = '\0'; |
| } |
| while (c1 == c2 && c1 != '\0'); |
| |
| return c1 - c2; |
| } |
| |
| /* Execute a Windows executable as a child process. This will fail if the |
| * target is not actually an executable, such as if it is a shell script. */ |
| |
| static pid_t |
| win32_spawn (const char *executable, |
| BOOL search, |
| char *const *argv, |
| char *const *env, /* array of strings of the form: VAR=VALUE */ |
| DWORD dwCreationFlags, |
| LPSTARTUPINFO si, |
| LPPROCESS_INFORMATION pi) |
| { |
| char *full_executable; |
| char *cmdline; |
| char **env_copy; |
| char *env_block = NULL; |
| |
| full_executable = NULL; |
| cmdline = NULL; |
| |
| if (env) |
| { |
| int env_size; |
| |
| /* Count the number of environment bindings supplied. */ |
| for (env_size = 0; env[env_size]; env_size++) |
| continue; |
| |
| /* Assemble an environment block, if required. This consists of |
| VAR=VALUE strings juxtaposed (with one null character between each |
| pair) and an additional null at the end. */ |
| if (env_size > 0) |
| { |
| int var; |
| int total_size = 1; /* 1 is for the final null. */ |
| char *bufptr; |
| |
| /* Windows needs the members of the block to be sorted by variable |
| name. */ |
| env_copy = (char **) alloca (sizeof (char *) * env_size); |
| memcpy (env_copy, env, sizeof (char *) * env_size); |
| qsort (env_copy, env_size, sizeof (char *), env_compare); |
| |
| for (var = 0; var < env_size; var++) |
| total_size += strlen (env[var]) + 1; |
| |
| env_block = XNEWVEC (char, total_size); |
| bufptr = env_block; |
| for (var = 0; var < env_size; var++) |
| bufptr = stpcpy (bufptr, env_copy[var]) + 1; |
| |
| *bufptr = '\0'; |
| } |
| } |
| |
| full_executable = find_executable (executable, search); |
| if (!full_executable) |
| goto error; |
| cmdline = argv_to_cmdline (argv); |
| if (!cmdline) |
| goto error; |
| |
| /* Create the child process. */ |
| if (!CreateProcess (full_executable, cmdline, |
| /*lpProcessAttributes=*/NULL, |
| /*lpThreadAttributes=*/NULL, |
| /*bInheritHandles=*/TRUE, |
| dwCreationFlags, |
| (LPVOID) env_block, |
| /*lpCurrentDirectory=*/NULL, |
| si, |
| pi)) |
| { |
| free (env_block); |
| |
| free (full_executable); |
| |
| return (pid_t) -1; |
| } |
| |
| /* Clean up. */ |
| CloseHandle (pi->hThread); |
| free (full_executable); |
| free (env_block); |
| |
| return (pid_t) pi->hProcess; |
| |
| error: |
| free (env_block); |
| free (cmdline); |
| free (full_executable); |
| |
| return (pid_t) -1; |
| } |
| |
| /* Spawn a script. This simulates the Unix script execution mechanism. |
| This function is called as a fallback if win32_spawn fails. */ |
| |
| static pid_t |
| spawn_script (const char *executable, char *const *argv, |
| char* const *env, |
| DWORD dwCreationFlags, |
| LPSTARTUPINFO si, |
| LPPROCESS_INFORMATION pi) |
| { |
| pid_t pid = (pid_t) -1; |
| int save_errno = errno; |
| int fd = _open (executable, _O_RDONLY); |
| |
| /* Try to open script, check header format, extract interpreter path, |
| and spawn script using that interpretter. */ |
| if (fd >= 0) |
| { |
| char buf[MAX_PATH + 5]; |
| int len = _read (fd, buf, sizeof (buf) - 1); |
| _close (fd); |
| if (len > 3) |
| { |
| char *eol; |
| buf[len] = '\0'; |
| eol = strchr (buf, '\n'); |
| if (eol && strncmp (buf, "#!", 2) == 0) |
| { |
| |
| /* Header format is OK. */ |
| char *executable1; |
| int new_argc; |
| const char **avhere; |
| |
| /* Extract interpreter path. */ |
| do |
| *eol = '\0'; |
| while (*--eol == '\r' || *eol == ' ' || *eol == '\t'); |
| for (executable1 = buf + 2; *executable1 == ' ' || *executable1 == '\t'; executable1++) |
| continue; |
| backslashify (executable1); |
| |
| /* Duplicate argv, prepending the interpreter path. */ |
| new_argc = argv_to_argc (argv) + 1; |
| avhere = XNEWVEC (const char *, new_argc + 1); |
| *avhere = executable1; |
| memcpy (avhere + 1, argv, new_argc * sizeof(*argv)); |
| argv = (char *const *)avhere; |
| |
| /* Spawn the child. */ |
| #ifndef USE_MINGW_MSYS |
| executable = strrchr (executable1, '\\') + 1; |
| if (!executable) |
| executable = executable1; |
| pid = win32_spawn (executable, TRUE, argv, env, |
| dwCreationFlags, si, pi); |
| #else |
| if (strchr (executable1, '\\') == NULL) |
| pid = win32_spawn (executable1, TRUE, argv, env, |
| dwCreationFlags, si, pi); |
| else if (executable1[0] != '\\') |
| pid = win32_spawn (executable1, FALSE, argv, env, |
| dwCreationFlags, si, pi); |
| else |
| { |
| const char *newex = mingw_rootify (executable1); |
| *avhere = newex; |
| pid = win32_spawn (newex, FALSE, argv, env, |
| dwCreationFlags, si, pi); |
| if (executable1 != newex) |
| free ((char *) newex); |
| if (pid == (pid_t) -1) |
| { |
| newex = msys_rootify (executable1); |
| if (newex != executable1) |
| { |
| *avhere = newex; |
| pid = win32_spawn (newex, FALSE, argv, env, |
| dwCreationFlags, si, pi); |
| free ((char *) newex); |
| } |
| } |
| } |
| #endif |
| free (avhere); |
| } |
| } |
| } |
| if (pid == (pid_t) -1) |
| errno = save_errno; |
| return pid; |
| } |
| |
| /* Execute a child. */ |
| |
| static pid_t |
| pex_win32_exec_child (struct pex_obj *obj ATTRIBUTE_UNUSED, int flags, |
| const char *executable, char * const * argv, |
| char* const* env, |
| int in, int out, int errdes, |
| int toclose ATTRIBUTE_UNUSED, |
| const char **errmsg, |
| int *err) |
| { |
| pid_t pid; |
| HANDLE stdin_handle; |
| HANDLE stdout_handle; |
| HANDLE stderr_handle; |
| DWORD dwCreationFlags; |
| OSVERSIONINFO version_info; |
| STARTUPINFO si; |
| PROCESS_INFORMATION pi; |
| int orig_out, orig_in, orig_err; |
| BOOL separate_stderr = !(flags & PEX_STDERR_TO_STDOUT); |
| |
| /* Ensure we have inheritable descriptors to pass to the child. */ |
| orig_in = in; |
| in = _dup (orig_in); |
| |
| orig_out = out; |
| out = _dup (orig_out); |
| |
| if (separate_stderr) |
| { |
| orig_err = errdes; |
| errdes = _dup (orig_err); |
| } |
| |
| stdin_handle = INVALID_HANDLE_VALUE; |
| stdout_handle = INVALID_HANDLE_VALUE; |
| stderr_handle = INVALID_HANDLE_VALUE; |
| |
| stdin_handle = (HANDLE) _get_osfhandle (in); |
| stdout_handle = (HANDLE) _get_osfhandle (out); |
| if (separate_stderr) |
| stderr_handle = (HANDLE) _get_osfhandle (errdes); |
| else |
| stderr_handle = stdout_handle; |
| |
| /* Determine the version of Windows we are running on. */ |
| version_info.dwOSVersionInfoSize = sizeof (version_info); |
| GetVersionEx (&version_info); |
| if (version_info.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) |
| /* On Windows 95/98/ME the CREATE_NO_WINDOW flag is not |
| supported, so we cannot avoid creating a console window. */ |
| dwCreationFlags = 0; |
| else |
| { |
| HANDLE conout_handle; |
| |
| /* Determine whether or not we have an associated console. */ |
| conout_handle = CreateFile("CONOUT$", |
| GENERIC_WRITE, |
| FILE_SHARE_WRITE, |
| /*lpSecurityAttributes=*/NULL, |
| OPEN_EXISTING, |
| FILE_ATTRIBUTE_NORMAL, |
| /*hTemplateFile=*/NULL); |
| if (conout_handle == INVALID_HANDLE_VALUE) |
| /* There is no console associated with this process. Since |
| the child is a console process, the OS would normally |
| create a new console Window for the child. Since we'll be |
| redirecting the child's standard streams, we do not need |
| the console window. */ |
| dwCreationFlags = CREATE_NO_WINDOW; |
| else |
| { |
| /* There is a console associated with the process, so the OS |
| will not create a new console. And, if we use |
| CREATE_NO_WINDOW in this situation, the child will have |
| no associated console. Therefore, if the child's |
| standard streams are connected to the console, the output |
| will be discarded. */ |
| CloseHandle(conout_handle); |
| dwCreationFlags = 0; |
| } |
| } |
| |
| /* Since the child will be a console process, it will, by default, |
| connect standard input/output to its console. However, we want |
| the child to use the handles specifically designated above. In |
| addition, if there is no console (such as when we are running in |
| a Cygwin X window), then we must redirect the child's |
| input/output, as there is no console for the child to use. */ |
| memset (&si, 0, sizeof (si)); |
| si.cb = sizeof (si); |
| si.dwFlags = STARTF_USESTDHANDLES; |
| si.hStdInput = stdin_handle; |
| si.hStdOutput = stdout_handle; |
| si.hStdError = stderr_handle; |
| |
| /* Create the child process. */ |
| pid = win32_spawn (executable, (flags & PEX_SEARCH) != 0, |
| argv, env, dwCreationFlags, &si, &pi); |
| if (pid == (pid_t) -1) |
| pid = spawn_script (executable, argv, env, dwCreationFlags, |
| &si, &pi); |
| if (pid == (pid_t) -1) |
| { |
| *err = ENOENT; |
| *errmsg = "CreateProcess"; |
| } |
| |
| /* If the child was created successfully, close the original file |
| descriptors. If the process creation fails, these are closed by |
| pex_run_in_environment instead. We must not close them twice as |
| that seems to cause a Windows exception. */ |
| |
| if (pid != (pid_t) -1) |
| { |
| if (orig_in != STDIN_FILENO) |
| _close (orig_in); |
| if (orig_out != STDOUT_FILENO) |
| _close (orig_out); |
| if (separate_stderr |
| && orig_err != STDERR_FILENO) |
| _close (orig_err); |
| } |
| |
| /* Close the standard input, standard output and standard error handles |
| in the parent. */ |
| |
| _close (in); |
| _close (out); |
| if (separate_stderr) |
| _close (errdes); |
| |
| return pid; |
| } |
| |
| /* Wait for a child process to complete. MS CRTDLL doesn't return |
| enough information in status to decide if the child exited due to a |
| signal or not, rather it simply returns an integer with the exit |
| code of the child; eg., if the child exited with an abort() call |
| and didn't have a handler for SIGABRT, it simply returns with |
| status == 3. We fix the status code to conform to the usual WIF* |
| macros. Note that WIFSIGNALED will never be true under CRTDLL. */ |
| |
| static pid_t |
| pex_win32_wait (struct pex_obj *obj ATTRIBUTE_UNUSED, pid_t pid, |
| int *status, struct pex_time *time, int done ATTRIBUTE_UNUSED, |
| const char **errmsg, int *err) |
| { |
| DWORD termstat; |
| HANDLE h; |
| |
| if (time != NULL) |
| memset (time, 0, sizeof *time); |
| |
| h = (HANDLE) pid; |
| |
| /* FIXME: If done is non-zero, we should probably try to kill the |
| process. */ |
| if (WaitForSingleObject (h, INFINITE) != WAIT_OBJECT_0) |
| { |
| CloseHandle (h); |
| *err = ECHILD; |
| *errmsg = "WaitForSingleObject"; |
| return -1; |
| } |
| |
| GetExitCodeProcess (h, &termstat); |
| CloseHandle (h); |
| |
| /* A value of 3 indicates that the child caught a signal, but not |
| which one. Since only SIGABRT, SIGFPE and SIGINT do anything, we |
| report SIGABRT. */ |
| if (termstat == 3) |
| *status = SIGABRT; |
| else |
| *status = (termstat & 0xff) << 8; |
| |
| return 0; |
| } |
| |
| /* Create a pipe. */ |
| |
| static int |
| pex_win32_pipe (struct pex_obj *obj ATTRIBUTE_UNUSED, int *p, |
| int binary) |
| { |
| return _pipe (p, 256, (binary ? _O_BINARY : _O_TEXT) | _O_NOINHERIT); |
| } |
| |
| /* Get a FILE pointer to read from a file descriptor. */ |
| |
| static FILE * |
| pex_win32_fdopenr (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, |
| int binary) |
| { |
| HANDLE h = (HANDLE) _get_osfhandle (fd); |
| if (h == INVALID_HANDLE_VALUE) |
| return NULL; |
| if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) |
| return NULL; |
| return fdopen (fd, binary ? "rb" : "r"); |
| } |
| |
| static FILE * |
| pex_win32_fdopenw (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd, |
| int binary) |
| { |
| HANDLE h = (HANDLE) _get_osfhandle (fd); |
| if (h == INVALID_HANDLE_VALUE) |
| return NULL; |
| if (! SetHandleInformation (h, HANDLE_FLAG_INHERIT, 0)) |
| return NULL; |
| return fdopen (fd, binary ? "wb" : "w"); |
| } |
| |
| #ifdef MAIN |
| #include <stdio.h> |
| |
| int |
| main (int argc ATTRIBUTE_UNUSED, char **argv) |
| { |
| char const *errmsg; |
| int err; |
| argv++; |
| printf ("%ld\n", (long) pex_win32_exec_child (NULL, PEX_SEARCH, argv[0], argv, NULL, 0, 0, 1, 2, &errmsg, &err)); |
| exit (0); |
| } |
| #endif |