patch 9.0.1560: Win32: When 'encoding' is set $PATH has duplicate entries

Problem:    Win32: When 'encoding' is set $PATH has duplicate entries.
Solution:   Only append the directory if it is not there yet. (Ken Takata,
            closes #12400, closes #12372)

diff --git a/src/os_win32.c b/src/os_win32.c
index 550a335bd5415614948e9f0fb9a2ed62057bf21d..52e0583fc65190836e36a0cc5bc69ced20bd908d 100644 (file)
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -466,10 +466,10 @@ wait_for_single_object(
 mch_get_exe_name(void)
 {
     // Maximum length of $PATH is more than MAXPATHL.  8191 is often mentioned
-    // as the maximum length that works (plus a NUL byte).
-#define MAX_ENV_PATH_LEN 8192
-    char       temp[MAX_ENV_PATH_LEN];
-    char_u     *p;
+    // as the maximum length that works.  Add 1 for a NUL byte and 5 for
+    // "PATH=".
+#define MAX_ENV_PATH_LEN (8191 + 1 + 5)
+    WCHAR      temp[MAX_ENV_PATH_LEN];
     WCHAR      buf[MAX_PATH];
     int                updated = FALSE;
     static int enc_prev = -1;
@@ -482,16 +482,14 @@ mch_get_exe_name(void)
        {
            if (enc_codepage == -1)
                enc_codepage = GetACP();
-           if (exe_name != NULL)
-               vim_free(exe_name);
+           vim_free(exe_name);
            exe_name = utf16_to_enc(buf, NULL);
            enc_prev = enc_codepage;
 
            WCHAR *wp = wcsrchr(buf, '\\');
            if (wp != NULL)
                *wp = NUL;
-           if (exe_pathw != NULL)
-               vim_free(exe_pathw);
+           vim_free(exe_pathw);
            exe_pathw = _wcsdup(buf);
            updated = TRUE;
        }
@@ -500,28 +498,36 @@ mch_get_exe_name(void)
     if (exe_pathw == NULL || !updated)
        return;
 
-    char_u  *exe_path = utf16_to_enc(exe_pathw, NULL);
-    if (exe_path == NULL)
-       return;
-
     // Append our starting directory to $PATH, so that when doing
     // "!xxd" it's found in our starting directory.  Needed because
     // SearchPath() also looks there.
-    p = mch_getenv("PATH");
-    if (p == NULL
-           || STRLEN(p) + STRLEN(exe_path) + 2 < MAX_ENV_PATH_LEN)
+    WCHAR *p = _wgetenv(L"PATH");
+    if (p == NULL || wcslen(p) + wcslen(exe_pathw) + 2 + 5 < MAX_ENV_PATH_LEN)
     {
+       wcscpy(temp, L"PATH=");
+
        if (p == NULL || *p == NUL)
-           temp[0] = NUL;
+           wcscat(temp, exe_pathw);
        else
        {
-           STRCPY(temp, p);
-           STRCAT(temp, ";");
+           wcscat(temp, p);
+
+           // Check if exe_path is already included in $PATH.
+           if (wcsstr(temp, exe_pathw) == NULL)
+           {
+               // Append ';' if $PATH doesn't end with it.
+               size_t len = wcslen(temp);
+               if (temp[len - 1] != L';')
+                   wcscat(temp, L";");
+
+               wcscat(temp, exe_pathw);
+           }
        }
-       STRCAT(temp, exe_path);
-       vim_setenv((char_u *)"PATH", (char_u *)temp);
+       _wputenv(temp);
+#ifdef libintl_wputenv
+       libintl_wputenv(temp);
+#endif
     }
-    vim_free(exe_path);
 }
 
 /*
@@ -558,10 +564,11 @@ vimLoadLib(const char *name)
     // NOTE: Do not use mch_dirname() and mch_chdir() here, they may call
     // vimLoadLib() recursively, which causes a stack overflow.
     if (exe_pathw == NULL)
+    {
        mch_get_exe_name();
-
-    if (exe_pathw == NULL)
-       return NULL;
+       if (exe_pathw == NULL)
+           return NULL;
+    }
 
     WCHAR old_dirw[MAXPATHL];
 

diff --git a/src/version.c b/src/version.c
index 47079f5331cbb098c90cbf74aede6e65ccda27ce..7d691e37268f37e3e949054fbf0a9e028ee49613 100644 (file)
--- a/src/version.c
+++ b/src/version.c
@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1560,
 /**/
     1559,
 /**/