/* 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, 1997, 1998, 1999, 2000, 2001, 2003
+ Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006
Free Software Foundation, Inc.
This file is part of the libiberty library.
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., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+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
#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. */
# define WAIT_GRANDCHILD 1
#endif
-/* This is a kludge to get around the Microsoft C spawn functions' propensity
- to remove the outermost set of double quotes from all arguments. */
+#define MINGW_NAME "Minimalist GNU for Windows"
+#define MINGW_NAME_LEN (sizeof(MINGW_NAME) - 1)
+
+extern char *stpcpy (char *dst, const char *src);
-static const char * const *
-fix_argv (argvec)
- char **argvec;
+/* 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)
{
- int i;
- char * command0 = argvec[0];
+ while ((s = strchr (s, '/')) != NULL)
+ *s = '\\';
+ return;
+}
- /* Ensure that the executable pathname uses Win32 backslashes. */
- for (; *command0 != '\0'; command0++)
- if (*command0 == '/')
- *command0 = '\\';
-
- for (i = 1; argvec[i] != 0; i++)
+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 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)
+{
+ /* Note that we can't use O_EXCL here because gcc may have already
+ created the temporary file via make_temp_file. */
+ 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++)
{
- int len, j;
- char *temp, *newtemp;
+ LONG res;
+ hTmp = hKey;
+ res = RegOpenKey (hTmp, *keys, &hKey);
- temp = argvec[i];
- len = strlen (temp);
- for (j = 0; j < len; j++)
- {
- if (temp[j] == '"')
- {
- newtemp = xmalloc (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 (hTmp != HKEY_LOCAL_MACHINE)
+ RegCloseKey (hTmp);
- argvec[i] = temp;
- }
+ if (res != ERROR_SUCCESS)
+ return NULL;
+ }
+ return hKey;
+}
- for (i = 0; argvec[i] != 0; i++)
+/* 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)
{
- if (strpbrk (argvec[i], " \t"))
- {
- int len, trailing_backslash;
- char *temp;
-
- len = strlen (argvec[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
- && argvec[i][len-1] == '\\'
- && argvec[i][len-2] != '\\')
- {
- trailing_backslash = 1;
- ++len; /* to escape the final backslash. */
- }
+ RegCloseKey (hKey);
+ return executable;
+ }
+ namebuf = XNEWVEC (char, ++maxlen);
+ foundbuf = XNEWVEC (char, maxlen);
+ foundbuf[0] = '\0';
+ if (!namebuf || !foundbuf)
+ {
+ RegCloseKey (hKey);
+ if (namebuf)
+ free (namebuf);
+ if (foundbuf)
+ free (foundbuf);
+ return executable;
+ }
- len += 2; /* and for the enclosing quotes. */
+ /* 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);
- temp = xmalloc (len + 1);
- temp[0] = '"';
- strcpy (temp + 1, argvec[i]);
- if (trailing_backslash)
- temp[len-2] = '\\';
- temp[len-1] = '"';
- temp[len] = '\0';
+ /* 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);
+ }
- argvec[i] = temp;
+ /* 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;
}
}
- return (const char * const *) argvec;
+ if (res)
+ return tack_on_executable (buf, executable);
+
+ /* failed */
+ if (buf)
+ free (buf);
+ return executable;
}
+#endif
-/* Win32 supports pipes */
-int
-pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
- const char *program;
- char * const *argv;
- const char *this_pname;
- const char *temp_base;
- char **errmsg_fmt, **errmsg_arg;
- int flags;
-{
- int pid;
- int pdes[2], org_stdin, org_stdout;
- int input_desc, output_desc;
- int retries, sleep_interval;
-
- /* Pipe waiting from last process, to be used as input for the next one.
- Value is STDIN_FILE_NO if no pipe is waiting
- (i.e. the next command is the first of a group). */
- static int last_pipe_input;
-
- /* If this is the first process, initialize. */
- if (flags & PEXECUTE_FIRST)
- last_pipe_input = STDIN_FILE_NO;
-
- input_desc = last_pipe_input;
-
- /* If this isn't the last process, make a pipe for its output,
- and record it as waiting to be the input to the next process. */
- if (! (flags & PEXECUTE_LAST))
- {
- if (_pipe (pdes, 256, O_BINARY) < 0)
+/* 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;
+
+ 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++)
{
- *errmsg_fmt = "pipe";
- *errmsg_arg = NULL;
- return -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++;
+ }
}
- output_desc = pdes[WRITE_PORT];
- last_pipe_input = pdes[READ_PORT];
+ /* 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 */
}
- else
+ cmdline = XNEWVEC (char, cmdline_len);
+ p = cmdline;
+ for (i = 0; argv[i]; i++)
{
- /* Last process. */
- output_desc = STDOUT_FILE_NO;
- last_pipe_input = STDIN_FILE_NO;
+ *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;
+}
- if (input_desc != STDIN_FILE_NO)
+/* 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)
{
- org_stdin = dup (STDIN_FILE_NO);
- dup2 (input_desc, STDIN_FILE_NO);
- close (input_desc);
+ 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);
- if (output_desc != STDOUT_FILE_NO)
+ p = path;
+ do
{
- org_stdout = dup (STDOUT_FILE_NO);
- dup2 (output_desc, STDOUT_FILE_NO);
- close (output_desc);
+ 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;
- pid = (flags & PEXECUTE_SEARCH ? _spawnvp : _spawnv)
- (_P_NOWAIT, program, fix_argv(argv));
+ found:
+ CloseHandle (h);
+ return full_executable;
+}
- if (input_desc != STDIN_FILE_NO)
+/* 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
{
- dup2 (org_stdin, STDIN_FILE_NO);
- close (org_stdin);
+ c1 = (unsigned char) tolower (*a++);
+ c2 = (unsigned char) tolower (*b++);
+
+ if (c1 == '=')
+ c1 = '\0';
+
+ if (c2 == '=')
+ c2 = '\0';
}
+ while (c1 == c2 && c1 != '\0');
- if (output_desc != STDOUT_FILE_NO)
+ 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)
{
- dup2 (org_stdout, STDOUT_FILE_NO);
- close (org_stdout);
+ 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';
+ }
}
- if (pid == -1)
+ 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))
{
- *errmsg_fmt = install_error_msg;
- *errmsg_arg = (char*) program;
- return -1;
+ if (env_block)
+ free (env_block);
+
+ free (full_executable);
+
+ return (pid_t) -1;
}
+ /* Clean up. */
+ CloseHandle (pi->hThread);
+ free (full_executable);
+ if (env_block)
+ free (env_block);
+
+ return (pid_t) pi->hProcess;
+
+ error:
+ if (env_block)
+ free (env_block);
+ if (cmdline)
+ free (cmdline);
+ if (full_executable)
+ 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;
}
-/* 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. */
+/* Execute a child. */
-int
-pwait (pid, status, flags)
- int pid;
- int *status;
- int flags;
+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, and close the
+ original descriptors. */
+ orig_in = in;
+ in = _dup (orig_in);
+ if (orig_in != STDIN_FILENO)
+ _close (orig_in);
+
+ orig_out = out;
+ out = _dup (orig_out);
+ if (orig_out != STDOUT_FILENO)
+ _close (orig_out);
+
+ if (separate_stderr)
+ {
+ orig_err = errdes;
+ errdes = _dup (orig_err);
+ if (orig_err != STDERR_FILENO)
+ _close (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";
+ }
+
+ /* 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)
{
- int termstat;
+ DWORD termstat;
+ HANDLE h;
- pid = _cwait (&termstat, pid, WAIT_CHILD);
+ if (time != NULL)
+ memset (time, 0, sizeof *time);
- /* ??? Here's an opportunity to canonicalize the values in STATUS.
- Needed? */
+ 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;
+ }
- /* cwait returns the child process exit code in termstat.
- A value of 3 indicates that the child caught a signal, but not
+ 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 pid;
+ 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
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