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* cygcheck.cc (dll_info): Detect and report on symlinks. Output wrong

Browse Source 
architecture message inline with stdout for clarity.
* path.cc (is_symlink): Always reset file pointer to beginning on exit.
(readlink): Assume that file pointer is set to the beginning.
This commit is contained in:
Christopher Faylor 2013-07-07 16:57:11 +00:00
parent b1b497cb2e
commit 40f11fc133
3 changed files with 38 additions and 17 deletions
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7
winsup/utils/ChangeLog
View File

@ -1,3 +1,10 @@
2013-07-07 Christopher Faylor <me.cygwin2013@cgf.cx>
* cygcheck.cc (dll_info): Detect and report on symlinks. Output wrong
architecture message inline with stdout for clarity.
* path.cc (is_symlink): Always reset file pointer to beginning on exit.
(readlink): Assume that file pointer is set to the beginning.
2013-06-26 Corinna Vinschen <corinna@vinschen.de>
* cygpath.cc (do_pathconv): when -p option is given, generate wide

23
winsup/utils/cygcheck.cc
View File

@ -590,11 +590,26 @@ cygwin_info (HANDLE h)
return;
}
/* Special case. Don't complain about this one. */
#define CYGLSA64_DLL "\\cyglsa64.dll"
static void
dll_info (const char *path, HANDLE fh, int lvl, int recurse)
{
DWORD junk;
int i;
if (is_symlink (fh))
{
if (!verbose)
puts ("");
else
{
char buf[PATH_MAX + 1] = "";
readlink (fh, buf, sizeof(buf) - 1);
printf (" (symlink to %s)\n", buf);
}
return;
}
int pe_header_offset = get_dword (fh, 0x3c);
if (GetLastError () != NO_ERROR)
display_error ("get_dword");
@ -604,18 +619,14 @@ dll_info (const char *path, HANDLE fh, int lvl, int recurse)
#ifdef __x86_64__
if (arch != IMAGE_FILE_MACHINE_AMD64)
{
fputc ('\n', stderr);
display_error ("Wrong architecture. Only x86_64 executables supported.",
false, false);
puts (verbose ? " (not x86_64 dll)" : "\n");
return;
}
int base_off = 108;
#else
if (arch != IMAGE_FILE_MACHINE_I386)
{
fputc ('\n', stderr);
display_error ("Wrong architecture. Only ix86 executables supported.",
false, false);
puts (verbose ? " (not x86 dll)" : "\n");
return;
}
int base_off = 92;

25
winsup/utils/path.cc
View File

@ -140,9 +140,10 @@ is_exe (HANDLE fh)
bool
is_symlink (HANDLE fh)
{
bool ret = false;
int magic = get_word (fh, 0x0);
if (magic != SHORTCUT_MAGIC && magic != SYMLINK_MAGIC)
return false;
goto out;
DWORD got;
BY_HANDLE_FILE_INFORMATION local;
if (!GetFileInformationByHandle (fh, &local))
@ -151,31 +152,34 @@ is_symlink (HANDLE fh)
{
DWORD size;
if (!local.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
return false; /* Not a Cygwin symlink. */
goto out; /* Not a Cygwin symlink. */
if ((size = GetFileSize (fh, NULL)) > 8192)
return false; /* Not a Cygwin symlink. */
goto out; /* Not a Cygwin symlink. */
char buf[size];
SetFilePointer (fh, 0, 0, FILE_BEGIN);
if (!ReadFile (fh, buf, size, &got, 0))
return false;
goto out;
if (got != size || !cmp_shortcut_header ((win_shortcut_hdr *) buf))
return false; /* Not a Cygwin symlink. */
goto out; /* Not a Cygwin symlink. */
/* TODO: check for invalid path contents
(see symlink_info::check() in ../cygwin/path.cc) */
}
else /* magic == SYMLINK_MAGIC */
{
if (!local.dwFileAttributes & FILE_ATTRIBUTE_SYSTEM)
return false; /* Not a Cygwin symlink. */
goto out; /* Not a Cygwin symlink. */
char buf[sizeof (SYMLINK_COOKIE) - 1];
SetFilePointer (fh, 0, 0, FILE_BEGIN);
if (!ReadFile (fh, buf, sizeof (buf), &got, 0))
return false;
goto out;
if (got != sizeof (buf) ||
memcmp (buf, SYMLINK_COOKIE, sizeof (buf)) != 0)
return false; /* Not a Cygwin symlink. */
goto out; /* Not a Cygwin symlink. */
}
return true;
ret = true;
out:
SetFilePointer (fh, 0, 0, FILE_BEGIN);
return ret;
}
/* Assumes is_symlink(fh) is true */
@ -196,8 +200,7 @@ readlink (HANDLE fh, char *path, int maxlen)
buf = (char *) alloca (fi.nFileSizeLow + 1);
file_header = (win_shortcut_hdr *) buf;
if (SetFilePointer (fh, 0L, NULL, FILE_BEGIN) == INVALID_SET_FILE_POINTER
|| !ReadFile (fh, buf, fi.nFileSizeLow, &rv, NULL)
if (!ReadFile (fh, buf, fi.nFileSizeLow, &rv, NULL)
|| rv != fi.nFileSizeLow)
return false;