#include <config.h>
#include "lisp.h"
+#include "buffer.h"
#include "console-msw.h"
#include "hash.h"
#include "lstream.h"
+#include "nt.h"
#include "process.h"
#include "procimpl.h"
#include "sysdep.h"
/* Arbitrary size limit for code fragments passed to run_in_other_process */
#define FRAGMENT_CODE_SIZE 32
-/* Bound by winnt.el */
-Lisp_Object Qnt_quote_process_args;
-
/* Implementation-specific data. Pointed to by Lisp_Process->process_data */
struct nt_process_data
{
int need_enable_child_signals;
};
+/* Control how args are quoted to ensure correct parsing by child
+ process. */
+Lisp_Object Vmswindows_quote_process_args;
+
/* Control whether create_child causes the process to inherit Emacs'
console window, or be given a new one of its own. The default is
nil, to allow multiple DOS programs to run on Win95. Having separate
}
static void
-ensure_console_window_exists ()
+ensure_console_window_exists (void)
{
if (msw_windows9x_p ())
msw_hide_console ();
}
+int
+compare_env (const void *strp1, const void *strp2)
+{
+ const char *str1 = *(const char**)strp1, *str2 = *(const char**)strp2;
+
+ while (*str1 && *str2 && *str1 != '=' && *str2 != '=')
+ {
+ if ((*str1) > (*str2))
+ return 1;
+ else if ((*str1) < (*str2))
+ return -1;
+ str1++, str2++;
+ }
+
+ if (*str1 == '=' && *str2 == '=')
+ return 0;
+ else if (*str1 == '=')
+ return -1;
+ else
+ return 1;
+}
+
static int
nt_create_process (Lisp_Process *p,
Lisp_Object *argv, int nargv,
Lisp_Object program, Lisp_Object cur_dir)
{
+ /* Synched up with sys_spawnve in FSF 20.6. Significantly different
+ but still synchable. */
HANDLE hmyshove, hmyslurp, hprocin, hprocout, hprocerr;
- LPTSTR command_line;
+ Extbyte *command_line;
BOOL do_io, windowed;
char *proc_env;
+ /* No need to DOS-ize the filename; expand-file-name (called prior)
+ already does this. */
+
/* Find out whether the application is windowed or not */
{
/* SHGetFileInfo tends to return ERROR_FILE_NOT_FOUND on most
CreatePipe (&hmyslurp, &hprocout, &sa, 0);
/* Duplicate the stdout handle for use as stderr */
- DuplicateHandle(GetCurrentProcess(), hprocout, GetCurrentProcess(), &hprocerr,
- 0, TRUE, DUPLICATE_SAME_ACCESS);
+ DuplicateHandle(GetCurrentProcess(), hprocout, GetCurrentProcess(),
+ &hprocerr, 0, TRUE, DUPLICATE_SAME_ACCESS);
/* Stupid Win32 allows to create a pipe with *both* ends either
inheritable or not. We need process ends inheritable, and local
ends not inheritable. */
- DuplicateHandle (GetCurrentProcess(), hmyshove, GetCurrentProcess(), &htmp,
- 0, FALSE, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
+ DuplicateHandle (GetCurrentProcess(), hmyshove, GetCurrentProcess(),
+ &htmp, 0, FALSE,
+ DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
hmyshove = htmp;
- DuplicateHandle (GetCurrentProcess(), hmyslurp, GetCurrentProcess(), &htmp,
- 0, FALSE, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
+ DuplicateHandle (GetCurrentProcess(), hmyslurp, GetCurrentProcess(),
+ &htmp, 0, FALSE,
+ DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
hmyslurp = htmp;
}
- /* Convert an argv vector into Win32 style command line by a call to
- lisp function `nt-quote-process-args' which see (in winnt.el)*/
+ /* Convert an argv vector into Win32 style command line. */
{
int i;
- Lisp_Object args_or_ret = Qnil;
- struct gcpro gcpro1;
+ Bufbyte **quoted_args;
+ int is_dos_app, is_cygnus_app;
+ int do_quoting = 0;
+ char escape_char = 0;
+
+ nargv++; /* include program; we access argv offset by 1 below */
+ quoted_args = alloca_array (Bufbyte *, nargv);
+
+ /* Determine whether program is a 16-bit DOS executable, or a Win32
+ executable that is implicitly linked to the Cygnus dll (implying it
+ was compiled with the Cygnus GNU toolchain and hence relies on
+ cygwin.dll to parse the command line - we use this to decide how to
+ escape quote chars in command line args that must be quoted). */
+ mswindows_executable_type (XSTRING_DATA (program),
+ &is_dos_app, &is_cygnus_app);
- GCPRO1 (args_or_ret);
+#if 0
+ /* #### we need to port this. */
+ /* On Windows 95, if cmdname is a DOS app, we invoke a helper
+ application to start it by specifying the helper app as cmdname,
+ while leaving the real app name as argv[0]. */
+ if (is_dos_app)
+ {
+ cmdname = (char*) alloca (MAXPATHLEN);
+ if (egetenv ("CMDPROXY"))
+ strcpy ((char*)cmdname, egetenv ("CMDPROXY"));
+ else
+ {
+ strcpy ((char*)cmdname, XSTRING_DATA (Vinvocation_directory));
+ strcat ((char*)cmdname, "cmdproxy.exe");
+ }
+ }
+#endif
+
+ /* we have to do some conjuring here to put argv and envp into the
+ form CreateProcess wants... argv needs to be a space separated/null
+ terminated list of parameters, and envp is a null
+ separated/double-null terminated list of parameters.
+
+ Additionally, zero-length args and args containing whitespace or
+ quote chars need to be wrapped in double quotes - for this to work,
+ embedded quotes need to be escaped as well. The aim is to ensure
+ the child process reconstructs the argv array we start with
+ exactly, so we treat quotes at the beginning and end of arguments
+ as embedded quotes.
+
+ The Win32 GNU-based library from Cygnus doubles quotes to escape
+ them, while MSVC uses backslash for escaping. (Actually the MSVC
+ startup code does attempt to recognize doubled quotes and accept
+ them, but gets it wrong and ends up requiring three quotes to get a
+ single embedded quote!) So by default we decide whether to use
+ quote or backslash as the escape character based on whether the
+ binary is apparently a Cygnus compiled app.
+
+ Note that using backslash to escape embedded quotes requires
+ additional special handling if an embedded quote is already
+ preceded by backslash, or if an arg requiring quoting ends with
+ backslash. In such cases, the run of escape characters needs to be
+ doubled. For consistency, we apply this special handling as long
+ as the escape character is not quote.
+
+ Since we have no idea how large argv and envp are likely to be we
+ figure out list lengths on the fly and allocate them. */
+
+ if (!NILP (Vmswindows_quote_process_args))
+ {
+ do_quoting = 1;
+ /* Override escape char by binding mswindows-quote-process-args to
+ desired character, or use t for auto-selection. */
+ if (INTP (Vmswindows_quote_process_args))
+ escape_char = (char) XINT (Vmswindows_quote_process_args);
+ else
+ escape_char = is_cygnus_app ? '"' : '\\';
+ }
+
+ /* do argv... */
+ for (i = 0; i < nargv; ++i)
+ {
+ Bufbyte *targ = XSTRING_DATA (i == 0 ? program : argv[i - 1]);
+ Bufbyte *p = targ;
+ int need_quotes = 0;
+ int escape_char_run = 0;
+ int arglen = 0;
+
+ if (*p == 0)
+ need_quotes = 1;
+ for ( ; *p; p++)
+ {
+ if (*p == '"')
+ {
+ /* allow for embedded quotes to be escaped */
+ arglen++;
+ need_quotes = 1;
+ /* handle the case where the embedded quote is already escaped */
+ if (escape_char_run > 0)
+ {
+ /* To preserve the arg exactly, we need to double the
+ preceding escape characters (plus adding one to
+ escape the quote character itself). */
+ arglen += escape_char_run;
+ }
+ }
+ else if (*p == ' ' || *p == '\t')
+ {
+ need_quotes = 1;
+ }
+
+ if (*p == escape_char && escape_char != '"')
+ escape_char_run++;
+ else
+ escape_char_run = 0;
+ }
+ if (need_quotes)
+ {
+ arglen += 2;
+ /* handle the case where the arg ends with an escape char - we
+ must not let the enclosing quote be escaped. */
+ if (escape_char_run > 0)
+ arglen += escape_char_run;
+ }
+ arglen += strlen (targ) + 1;
+
+ quoted_args[i] = alloca_array (Bufbyte, arglen);
+ }
for (i = 0; i < nargv; ++i)
- args_or_ret = Fcons (*argv++, args_or_ret);
- args_or_ret = Fnreverse (args_or_ret);
- args_or_ret = Fcons (program, args_or_ret);
+ {
+ Bufbyte *targ = XSTRING_DATA (i == 0 ? program : argv[i - 1]);
+ Bufbyte *p = targ;
+ int need_quotes = 0;
+ Bufbyte *parg = quoted_args[i];
+
+ if (*p == 0)
+ need_quotes = 1;
- args_or_ret = call1 (Qnt_quote_process_args, args_or_ret);
+ if (do_quoting)
+ {
+ for ( ; *p; p++)
+ if (*p == ' ' || *p == '\t' || *p == '"')
+ need_quotes = 1;
+ }
+ if (need_quotes)
+ {
+ int escape_char_run = 0;
+ Bufbyte * first;
+ Bufbyte * last;
+
+ p = targ;
+ first = p;
+ last = p + strlen (p) - 1;
+ *parg++ = '"';
+#if 0
+ /* This version does not escape quotes if they occur at the
+ beginning or end of the arg - this could lead to incorrect
+ behavior when the arg itself represents a command line
+ containing quoted args. I believe this was originally done
+ as a hack to make some things work, before
+ `mswindows-quote-process-args' was added. */
+ while (*p)
+ {
+ if (*p == '"' && p > first && p < last)
+ *parg++ = escape_char; /* escape embedded quotes */
+ *parg++ = *p++;
+ }
+#else
+ for ( ; *p; p++)
+ {
+ if (*p == '"')
+ {
+ /* double preceding escape chars if any */
+ while (escape_char_run > 0)
+ {
+ *parg++ = escape_char;
+ escape_char_run--;
+ }
+ /* escape all quote chars, even at beginning or end */
+ *parg++ = escape_char;
+ }
+ *parg++ = *p;
+
+ if (*p == escape_char && escape_char != '"')
+ escape_char_run++;
+ else
+ escape_char_run = 0;
+ }
+ /* double escape chars before enclosing quote */
+ while (escape_char_run > 0)
+ {
+ *parg++ = escape_char;
+ escape_char_run--;
+ }
+#endif
+ *parg++ = '"';
+ }
+ else
+ {
+ strcpy (parg, targ);
+ parg += strlen (targ);
+ }
+ *parg = '\0';
+ }
- if (!STRINGP (args_or_ret))
- /* Luser wrote his/her own clever version */
- error ("Bogus return value from `nt-quote-process-args'");
+ {
+ int total_cmdline_len = 0;
+ Extcount *extargcount = (Extcount *) alloca_array (Extcount, nargv);
+ Extbyte **extarg = (Extbyte **) alloca_array (Extbyte *, nargv);
+ Extbyte *command_ptr;
- command_line = alloca_array (char, (XSTRING_LENGTH (program)
- + XSTRING_LENGTH (args_or_ret) + 2));
- strcpy (command_line, XSTRING_DATA (program));
- strcat (command_line, " ");
- strcat (command_line, XSTRING_DATA (args_or_ret));
+ for (i = 0; i < nargv; ++i)
+ {
+ TO_EXTERNAL_FORMAT (C_STRING, quoted_args[i], ALLOCA,
+ (extarg[i], extargcount[i]), Qmswindows_tstr);
+ /* account for space and terminating null */
+ total_cmdline_len += extargcount[i] + EITCHAR_SIZE;
+ }
- UNGCPRO; /* args_or_ret */
+ command_line = alloca_array (char, total_cmdline_len);
+ command_ptr = command_line;
+ for (i = 0; i < nargv; ++i)
+ {
+ memcpy (command_ptr, extarg[i], extargcount[i]);
+ command_ptr += extargcount[i];
+ EICOPY_TCHAR (command_ptr, ' ');
+ command_ptr += EITCHAR_SIZE;
+ }
+ EICOPY_TCHAR (command_ptr, '\0');
+ command_ptr += EITCHAR_SIZE;
+ }
}
-
/* Set `proc_env' to a nul-separated array of the strings in
Vprocess_environment terminated by 2 nuls. */
{
- extern int compare_env (const char **strp1, const char **strp2);
char **env;
REGISTER Lisp_Object tem;
REGISTER char **new_env;
&& STRINGP (XCAR (tem)));
tem = XCDR (tem))
new_length++;
+
+ /* FSF adds an extra env var to hold the current process ID of the
+ Emacs process. Apparently this is used only by emacsserver.c,
+ which we have superseded to gnuserv.c. (#### Does it work under
+ MS Windows?)
+
+ sprintf (ppid_env_var_buffer, "EM_PARENT_PROCESS_ID=%d",
+ GetCurrentProcessId ());
+ arglen += strlen (ppid_env_var_buffer) + 1;
+ numenv++;
+ */
/* new_length + 1 to include terminating 0. */
env = new_env = alloca_array (char *, new_length + 1);
}
/*
- * Kill any process in the system given its PID.
+ * Kill any process in the system given its PID
*
* Returns zero if a signal successfully sent, or
* negative number upon failure
void
syms_of_process_nt (void)
{
- defsymbol (&Qnt_quote_process_args, "nt-quote-process-args");
}
void
vars_of_process_nt (void)
{
+ DEFVAR_LISP ("mswindows-quote-process-args",
+ &Vmswindows_quote_process_args /*
+Non-nil enables quoting of process arguments to ensure correct parsing.
+Because Windows does not directly pass argv arrays to child processes,
+programs have to reconstruct the argv array by parsing the command
+line string. For an argument to contain a space, it must be enclosed
+in double quotes or it will be parsed as multiple arguments.
+
+If the value is a character, that character will be used to escape any
+quote characters that appear, otherwise a suitable escape character
+will be chosen based on the type of the program (normal or Cygwin).
+*/ );
+ Vmswindows_quote_process_args = Qt;
+
DEFVAR_LISP ("mswindows-start-process-share-console",
&Vmswindows_start_process_share_console /*
When nil, new child processes are given a new console.
projects / chise / xemacs-chise.git.1 / blobdiff