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patch 8.1.1095: MS-Windows: executable() fails on very long filename

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Problem:    MS-Windows: executable() fails on very long filename.
Solution:   (Ken Takata, closes #4015)
This commit is contained in:
Bram Moolenaar
2019-03-30 21:51:28 +01:00
parent 5209334c55
commit 8662189736
3 changed files with 21 additions and 5 deletions
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13
src/os_win32.c
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@@ -3299,14 +3299,17 @@ mch_writable(char_u *name)
int
mch_can_exe(char_u *name, char_u **path, int use_path)
{
char_u buf[_MAX_PATH];
// WinNT and later can use _MAX_PATH wide characters for a pathname, which
// means that the maximum pathname is _MAX_PATH * 3 bytes when 'enc' is
// UTF-8.
char_u buf[_MAX_PATH * 3];
int len = (int)STRLEN(name);
char_u *p, *saved;
if (len >= _MAX_PATH) /* safety check */
if (len >= sizeof(buf)) // safety check
return FALSE;
/* Ty using the name directly when a Unix-shell like 'shell'. */
// Try using the name directly when a Unix-shell like 'shell'.
if (strstr((char *)gettail(p_sh), "sh") != NULL)
if (executable_exists((char *)name, path, use_path))
return TRUE;
@@ -3339,7 +3342,7 @@ mch_can_exe(char_u *name, char_u **path, int use_path)
}
vim_free(saved);
vim_strncpy(buf, name, _MAX_PATH - 1);
vim_strncpy(buf, name, sizeof(buf) - 1);
p = mch_getenv("PATHEXT");
if (p == NULL)
p = (char_u *)".com;.exe;.bat;.cmd";
@@ -3354,7 +3357,7 @@ mch_can_exe(char_u *name, char_u **path, int use_path)
++p;
}
else
copy_option_part(&p, buf + len, _MAX_PATH - len, ";");
copy_option_part(&p, buf + len, sizeof(buf) - len, ";");
if (executable_exists((char *)buf, path, use_path))
return TRUE;
}