Add functionality for converting UNIX paths in arguments and environm…

…ent variables to Windows form for native Win32 applications.
msys2 · Aug 25, 2024 · b084abe · b084abe
1 parent f858c02
commit b084abe
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Showing 10 changed files with 988 additions and 4 deletions.
diff --git a/winsup/cygwin/Makefile.am b/winsup/cygwin/Makefile.am
@@ -312,6 +312,7 @@ DLL_FILES= \
 	miscfuncs.cc \
 	mktemp.cc \
 	msg.cc \
+	msys2_path_conv.cc \
 	mount.cc \
 	net.cc \
 	netdb.cc \

diff --git a/winsup/cygwin/environ.cc b/winsup/cygwin/environ.cc
@@ -1046,7 +1046,7 @@ env_compare (const void *key, const void *memb)
    to the child. */
 char **
 build_env (const char * const *envp, PWCHAR &envblock, int &envc,
-	   bool no_envblock, HANDLE new_token)
+	   bool no_envblock, HANDLE new_token, bool keep_posix)
 {
   PWCHAR cwinenv = NULL;
   size_t winnum = 0;
@@ -1139,6 +1139,19 @@ build_env (const char * const *envp, PWCHAR &envblock, int &envc,
   for (srcp = envp, dstp = newenv, pass_dstp = pass_env; *srcp; srcp++)
     {
       bool calc_tl = !no_envblock;
+#ifdef __MSYS__
+      /* Don't pass timezone environment to non-msys applications */
+      if (!keep_posix && ascii_strncasematch(*srcp, "TZ=", 3))
+        {
+          const char *v = *srcp + 3;
+          if (*v == ':')
+            goto next1;
+          for (; *v; v++)
+            if (!isalpha(*v) && !isdigit(*v) &&
+                *v != '-' && *v != '+' && *v != ':')
+              goto next1;
+        }
+#endif
       /* Look for entries that require special attention */
       for (unsigned i = 0; i < SPENVS_SIZE; i++)
 	if (!saw_spenv[i] && (*dstp = spenvs[i].retrieve (no_envblock, *srcp)))
@@ -1259,6 +1272,15 @@ build_env (const char * const *envp, PWCHAR &envblock, int &envc,
 		  saw_PATH = true;
 		}
 	    }
+#ifdef __MSYS__
+	  else if (!keep_posix) {
+	    char *win_arg = arg_heuristic(*srcp);
+	    debug_printf("WIN32_PATH is %s", win_arg);
+	    p = cstrdup1(win_arg);
+	    if (win_arg != *srcp)
+	      free (win_arg);
+	  }
+#endif
 	  else
 	    p = *srcp;		/* Don't worry about it */
 

diff --git a/winsup/cygwin/external.cc b/winsup/cygwin/external.cc
@@ -141,7 +141,7 @@ create_winenv (const char * const *env)
   int unused_envc;
   PWCHAR envblock = NULL;
   char **envp = build_env (env ?: environ, envblock, unused_envc, false,
-			   NULL);
+			   NULL, true);
   PWCHAR p = envblock;
 
   if (envp)

diff --git a/winsup/cygwin/include/sys/cygwin.h b/winsup/cygwin/include/sys/cygwin.h
@@ -60,6 +60,12 @@ extern ssize_t cygwin_conv_path_list (cygwin_conv_path_t what, const void *from,
    to one of the above values, or to ENOMEM if malloc fails. */
 extern void *cygwin_create_path (cygwin_conv_path_t what, const void *from);
 
+extern char * arg_heuristic_with_exclusions (char const * const arg,
+					     char const * exclusions,
+					     size_t exclusions_count);
+
+extern char * arg_heuristic (char const * const);
+
 extern pid_t cygwin_winpid_to_pid (int);
 extern int cygwin_posix_path_list_p (const char *);
 extern void cygwin_split_path (const char *, char *, char *);

diff --git a/winsup/cygwin/local_includes/environ.h b/winsup/cygwin/local_includes/environ.h
@@ -34,7 +34,7 @@ win_env *getwinenv (const char *name, const char *posix = NULL, win_env * = NULL
 char *getwinenveq (const char *name, size_t len, int);
 
 char **build_env (const char * const *envp, PWCHAR &envblock,
-			  int &envc, bool need_envblock, HANDLE new_token);
+			  int &envc, bool need_envblock, HANDLE new_token, bool keep_posix);
 
 char **win32env_to_cygenv (PWCHAR rawenv, bool posify);
 

diff --git a/winsup/cygwin/local_includes/winf.h b/winsup/cygwin/local_includes/winf.h
@@ -56,6 +56,10 @@ class av
 	calloced = 1;
       }
   }
+  void replace (int i, const char *arg)
+  {
+    argv[i] = cstrdup1 (arg);
+  }
   void dup_all ()
   {
     for (int i = calloced; i < argc; i++)