diff options
Diffstat (limited to 'winsup/cygwin/path.cc')
| -rw-r--r-- | winsup/cygwin/path.cc | 83 |
1 files changed, 82 insertions, 1 deletions
diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc index f4527afd8..3d992926c 100644 --- a/winsup/cygwin/path.cc +++ b/winsup/cygwin/path.cc @@ -74,7 +74,6 @@ details. */ #include "shared_info.h" #include "registry.h" #include <assert.h> -#include "shortcut.h" #ifdef _MT_SAFE #define iteration _reent_winsup ()->_iteration @@ -105,6 +104,26 @@ struct symlink_info int pcheck_case = PCHECK_RELAXED; /* Determines the case check behaviour. */ +static char shortcut_header[SHORTCUT_HDR_SIZE]; +static BOOL shortcut_initalized; + +static void +create_shortcut_header (void) +{ + if (!shortcut_initalized) + { + shortcut_header[0] = 'L'; + shortcut_header[4] = '\001'; + shortcut_header[5] = '\024'; + shortcut_header[6] = '\002'; + shortcut_header[12] = '\300'; + shortcut_header[19] = 'F'; + shortcut_header[20] = '\f'; + shortcut_header[60] = '\001'; + shortcut_initalized = TRUE; + } +} + #define CYGWIN_REGNAME (cygheap->cygwin_regname ?: CYGWIN_INFO_CYGWIN_REGISTRY_NAME) /* Determine if path prefix matches current cygdrive */ @@ -2696,6 +2715,68 @@ done: return res; } +static BOOL +cmp_shortcut_header (const char *file_header) +{ + create_shortcut_header (); + return memcmp (shortcut_header, file_header, SHORTCUT_HDR_SIZE); +} + +static int +check_shortcut (const char *path, DWORD fileattr, HANDLE h, + char *contents, int *error, unsigned *pflags) +{ + char file_header[SHORTCUT_HDR_SIZE]; + unsigned short len; + int res = 0; + DWORD got = 0; + + /* Valid Cygwin & U/WIN shortcuts are R/O. */ + if (!(fileattr & FILE_ATTRIBUTE_READONLY)) + goto file_not_symlink; + /* Read the files header information. This is used to check for a + Cygwin or U/WIN shortcut or later to check for executable files. */ + if (!ReadFile (h, file_header, SHORTCUT_HDR_SIZE, &got, 0)) + { + *error = EIO; + goto close_it; + } + /* Check header if the shortcut is really created by Cygwin or U/WIN. */ + if (got != SHORTCUT_HDR_SIZE || cmp_shortcut_header (file_header)) + goto file_not_symlink; + /* Next 2 byte are USHORT, containing length of description entry. */ + if (!ReadFile (h, &len, sizeof len, &got, 0)) + { + *error = EIO; + goto close_it; + } + if (got != sizeof len || len == 0 || len > MAX_PATH) + goto file_not_symlink; + /* Now read description entry. */ + if (!ReadFile (h, contents, len, &got, 0)) + { + *error = EIO; + goto close_it; + } + if (got != len) + goto file_not_symlink; + contents[len] = '\0'; + res = len; + if (res) /* It's a symlink. */ + *pflags = PATH_SYMLINK; + goto close_it; + +file_not_symlink: + /* Not a symlink, see if executable. */ + if (!(*pflags & PATH_ALL_EXEC) && has_exec_chars (file_header, got)) + *pflags |= PATH_EXEC; + +close_it: + CloseHandle (h); + return res; +} + + static int check_sysfile (const char *path, DWORD fileattr, HANDLE h, char *contents, int *error, unsigned *pflags) |