#include <fcntl.h>
#include <signal.h>
#include <sys/stat.h>
+#include <errno.h>
/* mingw32 headers may not define the following. */
return;
}
-/* This is a kludge to get around the Microsoft C spawn functions' propensity
- to remove the outermost set of double quotes from all arguments. */
-
-static const char * const *
-fix_argv (char * const *argvec)
-{
- char **argv;
- int i;
- char *command0;
-
- /* See whether we need to change anything. */
- for (command0 = argvec[0]; *command0 != '\0'; command0++)
- if (*command0 == '/')
- break;
- if (*command0 == '\0')
- {
- for (i = 1; argvec[i] != NULL; i++)
- if (strpbrk (argvec[i], "\" \t") != NULL)
- break;
-
- if (argvec[i] == NULL)
- return (const char * const *) argvec;
- }
-
- for (i = 0; argvec[i] != NULL; i++)
- ;
- argv = XNEWVEC (char *, i + 2);
-
- argv++; /* Leave space at the beginning of argv
- for potential #! handling */
-
- for (i = 0; argvec[i] != NULL; i++)
- argv[i] = xstrdup (argvec[i]);
- argv[i] = NULL;
-
- backslashify (argv[0]);
-
- for (i = 1; argv[i] != 0; i++)
- {
- int len, j;
- char *temp, *newtemp;
-
- temp = argv[i];
- len = strlen (temp);
- for (j = 0; j < len; j++)
- {
- if (temp[j] == '"')
- {
- newtemp = XNEWVEC (char, len + 2);
- strncpy (newtemp, temp, j);
- newtemp [j] = '\\';
- strncpy (&newtemp [j+1], &temp [j], len-j);
- newtemp [len+1] = 0;
- temp = newtemp;
- len++;
- j++;
- }
- }
-
- if (argv[i] != temp)
- {
- free (argv[i]);
- argv[i] = temp;
- }
- }
-
- for (i = 0; argv[i] != 0; i++)
- {
- if (strpbrk (argv[i], " \t"))
- {
- int len, trailing_backslash;
- char *temp;
-
- len = strlen (argv[i]);
- trailing_backslash = 0;
-
- /* There is an added complication when an arg with embedded white
- space ends in a backslash (such as in the case of -iprefix arg
- passed to cpp). The resulting quoted strings gets misinterpreted
- by the command interpreter -- it thinks that the ending quote
- is escaped by the trailing backslash and things get confused.
- We handle this case by escaping the trailing backslash, provided
- it was not escaped in the first place. */
- if (len > 1
- && argv[i][len-1] == '\\'
- && argv[i][len-2] != '\\')
- {
- trailing_backslash = 1;
- ++len; /* to escape the final backslash. */
- }
-
- len += 2; /* and for the enclosing quotes. */
-
- temp = XNEWVEC (char, len + 1);
- temp[0] = '"';
- strcpy (temp + 1, argv[i]);
- if (trailing_backslash)
- temp[len - 2] = '\\';
- temp[len - 1] = '"';
- temp[len] = '\0';
-
- free (argv[i]);
- argv[i] = temp;
- }
- }
-
- return (const char * const *) argv;
-}
-
static int pex_win32_open_read (struct pex_obj *, const char *, int);
static int pex_win32_open_write (struct pex_obj *, const char *, int);
static long pex_win32_exec_child (struct pex_obj *, int, const char *,
}
#endif
+/* 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;
+
+ cmdline_len = 0;
+ for (i = 0; argv[i]; i++)
+ {
+ /* We quote every last argument. This simplifies the problem;
+ 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. */
+ for (j = 0; argv[i][j]; j++)
+ {
+ 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++;
+ }
+ }
+ /* Trailing backslashes also need to be escaped because they will be
+ followed by the terminating quote. */
+ for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--)
+ cmdline_len++;
+ cmdline_len += j;
+ cmdline_len += 3; /* for leading and trailing quotes and space */
+ }
+ cmdline = xmalloc (cmdline_len);
+ p = cmdline;
+ for (i = 0; argv[i]; i++)
+ {
+ *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];
+ }
+ for (k = j - 1; k >= 0 && argv[i][k] == '\\'; k--)
+ *p++ = '\\';
+ *p++ = '"';
+ *p++ = ' ';
+ }
+ p[-1] = '\0';
+ return cmdline;
+}
+
+static const char *const
+std_suffixes[] = {
+ ".com",
+ ".exe",
+ ".bat",
+ ".cmd",
+ 0
+};
+static const char *const
+no_suffixes[] = {
+ "",
+ 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_extension = !!strchr (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 + (has_extension ? 1 : 5);
+ full_executable = xmalloc (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 = has_extension ? no_suffixes : 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. */
+
+static long
+win32_spawn (const char *executable,
+ BOOL search,
+ char *const *argv,
+ DWORD dwCreationFlags,
+ LPSTARTUPINFO si,
+ LPPROCESS_INFORMATION pi)
+{
+ char *full_executable;
+ char *cmdline;
+
+ full_executable = NULL;
+ cmdline = NULL;
+
+ 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,
+ /*lpEnvironment=*/NULL,
+ /*lpCurrentDirectory=*/NULL,
+ si,
+ pi))
+ {
+ free (full_executable);
+ return -1;
+ }
+
+ /* Clean up. */
+ CloseHandle (pi->hThread);
+ free (full_executable);
+
+ return (long) pi->hProcess;
+
+ error:
+ if (cmdline)
+ free (cmdline);
+ if (full_executable)
+ free (full_executable);
+ return -1;
+}
+
static long
-spawn_script (const char *executable, const char * const * argv)
+spawn_script (const char *executable, char *const *argv,
+ DWORD dwCreationFlags,
+ LPSTARTUPINFO si,
+ LPPROCESS_INFORMATION pi)
{
int pid = -1;
int save_errno = errno;
executable = strrchr (executable1, '\\') + 1;
if (!executable)
executable = executable1;
- pid = _spawnvp (_P_NOWAIT, executable, argv);
+ pid = win32_spawn (executable, TRUE, argv,
+ dwCreationFlags, si, pi);
#else
if (strchr (executable1, '\\') == NULL)
- pid = _spawnvp (_P_NOWAIT, executable1, argv);
+ pid = win32_spawn (executable1, TRUE, argv,
+ dwCreationFlags, si, pi);
else if (executable1[0] != '\\')
- pid = _spawnv (_P_NOWAIT, executable1, argv);
+ pid = win32_spawn (executable1, FALSE, argv,
+ dwCreationFlags, si, pi);
else
{
const char *newex = mingw_rootify (executable1);
*avhere = newex;
- pid = _spawnv (_P_NOWAIT, newex, argv);
+ pid = win32_spawn (newex, FALSE, argv,
+ dwCreationFlags, si, pi);
if (executable1 != newex)
free ((char *) newex);
if (pid < 0)
if (newex != executable1)
{
*avhere = newex;
- pid = _spawnv (_P_NOWAIT, newex, argv);
+ pid = win32_spawn (newex, FALSE, argv,
+ dwCreationFlags, si, pi);
free ((char *) newex);
}
}
int in, int out, int errdes, const char **errmsg,
int *err)
{
- int org_in, org_out, org_errdes;
long pid;
- const char * const * newargv;
-
- org_in = -1;
- org_out = -1;
- org_errdes = -1;
-
- if (in != STDIN_FILE_NO)
- {
- org_in = _dup (STDIN_FILE_NO);
- if (org_in < 0)
- {
- *err = errno;
- *errmsg = "_dup";
- return -1;
- }
- if (_dup2 (in, STDIN_FILE_NO) < 0)
- {
- *err = errno;
- *errmsg = "_dup2";
- return -1;
- }
- if (_close (in) < 0)
- {
- *err = errno;
- *errmsg = "_close";
- return -1;
- }
- }
-
- if (out != STDOUT_FILE_NO)
- {
- org_out = _dup (STDOUT_FILE_NO);
- if (org_out < 0)
- {
- *err = errno;
- *errmsg = "_dup";
- return -1;
- }
- if (_dup2 (out, STDOUT_FILE_NO) < 0)
- {
- *err = errno;
- *errmsg = "_dup2";
- return -1;
- }
- if (_close (out) < 0)
- {
- *err = errno;
- *errmsg = "_close";
- return -1;
- }
- }
-
- if (errdes != STDERR_FILE_NO
- || (flags & PEX_STDERR_TO_STDOUT) != 0)
+ HANDLE stdin_handle;
+ HANDLE stdout_handle;
+ HANDLE stderr_handle;
+ DWORD dwCreationFlags;
+ OSVERSIONINFO version_info;
+ STARTUPINFO si;
+ PROCESS_INFORMATION pi;
+
+ 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 (!(flags & PEX_STDERR_TO_STDOUT))
+ 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
{
- org_errdes = _dup (STDERR_FILE_NO);
- if (org_errdes < 0)
+ 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
{
- *err = errno;
- *errmsg = "_dup";
- return -1;
- }
- if (_dup2 ((flags & PEX_STDERR_TO_STDOUT) != 0 ? STDOUT_FILE_NO : errdes,
- STDERR_FILE_NO) < 0)
- {
- *err = errno;
- *errmsg = "_dup2";
- return -1;
- }
- if (errdes != STDERR_FILE_NO)
- {
- if (_close (errdes) < 0)
- {
- *err = errno;
- *errmsg = "_close";
- return -1;
- }
+ /* 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;
}
}
- newargv = fix_argv (argv);
- pid = (((flags & PEX_SEARCH) != 0 ? _spawnvp : _spawnv)
- (_P_NOWAIT, executable, newargv));
-
+ /* 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, dwCreationFlags, &si, &pi);
if (pid == -1)
- pid = spawn_script (executable, newargv);
-
+ pid = spawn_script (executable, argv, dwCreationFlags, &si, &pi);
if (pid == -1)
{
- *err = errno;
- *errmsg = ((flags & PEX_SEARCH) != 0) ? "_spawnvp" : "_spawnv";
+ *err = ENOENT;
+ *errmsg = "CreateProcess";
}
- if (in != STDIN_FILE_NO)
- {
- if (_dup2 (org_in, STDIN_FILE_NO) < 0)
- {
- *err = errno;
- *errmsg = "_dup2";
- return -1;
- }
- if (_close (org_in) < 0)
- {
- *err = errno;
- *errmsg = "_close";
- return -1;
- }
- }
-
- if (out != STDOUT_FILE_NO)
- {
- if (_dup2 (org_out, STDOUT_FILE_NO) < 0)
- {
- *err = errno;
- *errmsg = "_dup2";
- return -1;
- }
- if (_close (org_out) < 0)
- {
- *err = errno;
- *errmsg = "_close";
- return -1;
- }
- }
-
- if (errdes != STDERR_FILE_NO
- || (flags & PEX_STDERR_TO_STDOUT) != 0)
- {
- if (_dup2 (org_errdes, STDERR_FILE_NO) < 0)
- {
- *err = errno;
- *errmsg = "_dup2";
- return -1;
- }
- if (_close (org_errdes) < 0)
- {
- *err = errno;
- *errmsg = "_close";
- return -1;
- }
- }
+ /* Close the standard output and standard error handles in the
+ parent. */
+ if (out != STDOUT_FILENO)
+ obj->funcs->close (obj, out);
+ if (errdes != STDERR_FILENO)
+ obj->funcs->close (obj, errdes);
return pid;
}
int *status, struct pex_time *time, int done ATTRIBUTE_UNUSED,
const char **errmsg, int *err)
{
- int termstat;
+ 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 (_cwait (&termstat, pid, WAIT_CHILD) < 0)
+ if (WaitForSingleObject (h, INFINITE) != WAIT_OBJECT_0)
{
- *err = errno;
- *errmsg = "_cwait";
+ CloseHandle (h);
+ *err = ECHILD;
+ *errmsg = "WaitForSingleObject";
return -1;
}
- /* cwait returns the child process exit code in termstat. 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. */
-
+ 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);
+ *status = (termstat & 0xff) << 8;
return 0;
}
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