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* spawn.cc (child_info_spawn::worker): Eliminate call to newargv.set() in favor

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of conglomerated newargv.setup().  Let newargv.setup() decide when to call
dup_all().  Only set argc and argv for cygwin processes.
(av::setup): Rename from av::fixup.  Accept argc and argv parameters.  Fill out
argv and argc here.  Duplicate whole argv structure when this is a Cygwin
executable.
* winf.cc (linebuf::fromargv): Don't bother duplicating argv elements since
they will never be used.
* winf.h (av::set): Delete.
(av::setup): Rename from av::fixup.  Add two parameters.
(av::replace0_maybe): Assign calloced to 1 rather than 'true' for clarity.
(av::dup_maybe): Delete.
(av::dup_all): Set calloced to show that we have duplicated all of the
arguments in the list.
This commit is contained in:
Christopher Faylor
2013-06-19 16:00:43 +00:00
parent 82c19d335a
commit 37ee5b49af
4 changed files with 181 additions and 170 deletions
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18
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,21 @@
2013-06-19 Christopher Faylor <me.cygwin2013@cgf.cx>
* spawn.cc (child_info_spawn::worker): Eliminate call to newargv.set()
in favor of conglomerated newargv.setup(). Let newargv.setup() decide
when to call dup_all(). Only set argc and argv for cygwin processes.
(av::setup): Rename from av::fixup. Accept argc and argv parameters.
Fill out argv and argc here. Duplicate whole argv structure when this
is a Cygwin executable.
* winf.cc (linebuf::fromargv): Don't bother duplicating argv elements
since they will never be used.
* winf.h (av::set): Delete.
(av::setup): Rename from av::fixup. Add two parameters.
(av::replace0_maybe): Assign calloced to 1 rather than 'true' for
clarity.
(av::dup_maybe): Delete.
(av::dup_all): Set calloced to show that we have duplicated all of the
arguments in the list.
2013-06-18 Corinna Vinschen <corinna@vinschen.de>
* nlsfuncs.cc (__collate_range_cmp): Convert input to wchar_t and call

318
winsup/cygwin/spawn.cc
View File

@ -359,8 +359,6 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
for (ac = 0; argv[ac]; ac++)
/* nothing */;
newargv.set (ac, argv);
int err;
const char *ext;
if ((ext = perhaps_suffix (prog_arg, real_path, err, FE_NADA)) == NULL)
@ -370,7 +368,7 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
goto out;
}
res = newargv.fixup (prog_arg, real_path, ext, p_type_exec);
res = newargv.setup (prog_arg, real_path, ext, ac, argv, p_type_exec);
if (res)
goto out;
@ -405,7 +403,10 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
else
{
if (real_path.iscygexec ())
newargv.dup_all ();
{
moreinfo->argc = newargv.argc;
moreinfo->argv = newargv;
}
else if (!one_line.fromargv (newargv, real_path.get_win32 (),
real_path.iscygexec ()))
{
@ -414,10 +415,6 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
}
newargv.all_calloced ();
moreinfo->argc = newargv.argc;
moreinfo->argv = newargv;
if (mode != _P_OVERLAY || !real_path.iscygexec ()
|| !DuplicateHandle (GetCurrentProcess (), myself.shared_handle (),
GetCurrentProcess (), &moreinfo->myself_pinfo,
@ -1073,174 +1070,177 @@ spawnvpe (int mode, const char *file, const char * const *argv,
}
int
av::fixup (const char *prog_arg, path_conv& real_path, const char *ext,
bool p_type_exec)
av::setup (const char *prog_arg, path_conv& real_path, const char *ext,
int argc, const char *const *argv, bool p_type_exec)
{
const char *p;
bool exeext = ascii_strcasematch (ext, ".exe");
if ((exeext && real_path.iscygexec ()) || ascii_strcasematch (ext, ".bat"))
return 0;
if (!*ext && ((p = ext - 4) > real_path.get_win32 ())
&& (ascii_strcasematch (p, ".bat") || ascii_strcasematch (p, ".cmd")
|| ascii_strcasematch (p, ".btm")))
return 0;
while (1)
{
char *pgm = NULL;
char *arg1 = NULL;
char *ptr, *buf;
OBJECT_ATTRIBUTES attr;
IO_STATUS_BLOCK io;
HANDLE h;
NTSTATUS status;
LARGE_INTEGER size;
new (this) av (argc, argv);
if ((exeext && real_path.iscygexec ()) || ascii_strcasematch (ext, ".bat")
|| (!*ext && ((p = ext - 4) > real_path.get_win32 ())
&& (ascii_strcasematch (p, ".bat") || ascii_strcasematch (p, ".cmd")
|| ascii_strcasematch (p, ".btm"))))
/* no extra checks needed */;
else
while (1)
{
char *pgm = NULL;
char *arg1 = NULL;
char *ptr, *buf;
OBJECT_ATTRIBUTES attr;
IO_STATUS_BLOCK io;
HANDLE h;
NTSTATUS status;
LARGE_INTEGER size;
status = NtOpenFile (&h, SYNCHRONIZE | GENERIC_READ,
real_path.get_object_attr (attr, sec_none_nih),
&io, FILE_SHARE_VALID_FLAGS,
FILE_SYNCHRONOUS_IO_NONALERT
| FILE_OPEN_FOR_BACKUP_INTENT
| FILE_NON_DIRECTORY_FILE);
if (!NT_SUCCESS (status))
{
/* File is not readable? Doesn't mean it's not executable.
Test for executability and if so, just assume the file is
a cygwin executable and go ahead. */
if (status == STATUS_ACCESS_DENIED && real_path.has_acls ()
&& check_file_access (real_path, X_OK, true) == 0)
{
real_path.set_cygexec (true);
break;
}
goto err;
}
if (!GetFileSizeEx (h, &size))
{
NtClose (h);
goto err;
}
if (size.QuadPart > (LONGLONG) wincap.allocation_granularity ())
size.LowPart = wincap.allocation_granularity ();
HANDLE hm = CreateFileMapping (h, &sec_none_nih, PAGE_READONLY,
0, 0, NULL);
NtClose (h);
if (!hm)
{
/* ERROR_FILE_INVALID indicates very likely an empty file. */
if (GetLastError () == ERROR_FILE_INVALID)
{
debug_printf ("zero length file, treat as script.");
goto just_shell;
}
goto err;
}
/* Try to map the first 64K of the image. That's enough for the local
tests, and it's enough for hook_or_detect_cygwin to compute the IAT
address. */
buf = (char *) MapViewOfFile (hm, FILE_MAP_READ, 0, 0, size.LowPart);
if (!buf)
{
CloseHandle (hm);
goto err;
}
status = NtOpenFile (&h, SYNCHRONIZE | GENERIC_READ,
real_path.get_object_attr (attr, sec_none_nih),
&io, FILE_SHARE_VALID_FLAGS,
FILE_SYNCHRONOUS_IO_NONALERT
| FILE_OPEN_FOR_BACKUP_INTENT
| FILE_NON_DIRECTORY_FILE);
if (!NT_SUCCESS (status))
{
/* File is not readable? Doesn't mean it's not executable.
Test for executability and if so, just assume the file is
a cygwin executable and go ahead. */
if (status == STATUS_ACCESS_DENIED && real_path.has_acls ()
&& check_file_access (real_path, X_OK, true) == 0)
myfault efault;
if (efault.faulted ())
{
real_path.set_cygexec (true);
UnmapViewOfFile (buf);
CloseHandle (hm);
real_path.set_cygexec (false);
break;
}
goto err;
}
if (!GetFileSizeEx (h, &size))
{
NtClose (h);
goto err;
}
if (size.QuadPart > (LONGLONG) wincap.allocation_granularity ())
size.LowPart = wincap.allocation_granularity ();
HANDLE hm = CreateFileMapping (h, &sec_none_nih, PAGE_READONLY,
0, 0, NULL);
NtClose (h);
if (!hm)
{
/* ERROR_FILE_INVALID indicates very likely an empty file. */
if (GetLastError () == ERROR_FILE_INVALID)
if (buf[0] == 'M' && buf[1] == 'Z')
{
debug_printf ("zero length file, treat as script.");
goto just_shell;
WORD subsys;
unsigned off = (unsigned char) buf[0x18] | (((unsigned char) buf[0x19]) << 8);
win16_exe = off < sizeof (IMAGE_DOS_HEADER);
if (!win16_exe)
real_path.set_cygexec (hook_or_detect_cygwin (buf, NULL,
subsys, hm));
else
real_path.set_cygexec (false);
UnmapViewOfFile (buf);
CloseHandle (hm);
break;
}
goto err;
}
/* Try to map the first 64K of the image. That's enough for the local
tests, and it's enough for hook_or_detect_cygwin to compute the IAT
address. */
buf = (char *) MapViewOfFile (hm, FILE_MAP_READ, 0, 0, size.LowPart);
if (!buf)
{
CloseHandle (hm);
goto err;
}
CloseHandle (hm);
{
myfault efault;
if (efault.faulted ())
debug_printf ("%s is possibly a script", real_path.get_win32 ());
ptr = buf;
if (*ptr++ == '#' && *ptr++ == '!')
{
UnmapViewOfFile (buf);
CloseHandle (hm);
real_path.set_cygexec (false);
break;
ptr += strspn (ptr, " \t");
size_t len = strcspn (ptr, "\r\n");
if (len)
{
char *namebuf = (char *) alloca (len + 1);
memcpy (namebuf, ptr, len);
namebuf[len] = '\0';
for (ptr = pgm = namebuf; *ptr; ptr++)
if (!arg1 && (*ptr == ' ' || *ptr == '\t'))
{
/* Null terminate the initial command and step over any
additional white space. If we've hit the end of the
line, exit the loop. Otherwise, we've found the first
argument. Position the current pointer on the last known
white space. */
*ptr = '\0';
char *newptr = ptr + 1;
newptr += strspn (newptr, " \t");
if (!*newptr)
break;
arg1 = newptr;
ptr = newptr - 1;
}
}
}
if (buf[0] == 'M' && buf[1] == 'Z')
UnmapViewOfFile (buf);
just_shell:
if (!pgm)
{
WORD subsys;
unsigned off = (unsigned char) buf[0x18] | (((unsigned char) buf[0x19]) << 8);
win16_exe = off < sizeof (IMAGE_DOS_HEADER);
if (!win16_exe)
real_path.set_cygexec (hook_or_detect_cygwin (buf, NULL,
subsys, hm));
else
real_path.set_cygexec (false);
UnmapViewOfFile (buf);
CloseHandle (hm);
break;
if (!p_type_exec)
{
/* Not called from exec[lv]p. Don't try to treat as script. */
debug_printf ("%s is not a valid executable",
real_path.get_win32 ());
set_errno (ENOEXEC);
return -1;
}
if (ascii_strcasematch (ext, ".com"))
break;
pgm = (char *) "/bin/sh";
arg1 = NULL;
}
/* Check if script is executable. Otherwise we start non-executable
scripts successfully, which is incorrect behaviour. */
if (real_path.has_acls ()
&& check_file_access (real_path, X_OK, true) < 0)
return -1; /* errno is already set. */
/* Replace argv[0] with the full path to the script if this is the
first time through the loop. */
replace0_maybe (prog_arg);
/* pointers:
* pgm interpreter name
* arg1 optional string
*/
if (arg1)
unshift (arg1);
/* FIXME: This should not be using FE_NATIVE. It should be putting
the posix path on the argv list. */
find_exec (pgm, real_path, "PATH=", FE_NATIVE, &ext);
unshift (real_path.get_win32 (), 1);
}
CloseHandle (hm);
debug_printf ("%s is possibly a script", real_path.get_win32 ());
ptr = buf;
if (*ptr++ == '#' && *ptr++ == '!')
{
ptr += strspn (ptr, " \t");
size_t len = strcspn (ptr, "\r\n");
if (len)
{
char *namebuf = (char *) alloca (len + 1);
memcpy (namebuf, ptr, len);
namebuf[len] = '\0';
for (ptr = pgm = namebuf; *ptr; ptr++)
if (!arg1 && (*ptr == ' ' || *ptr == '\t'))
{
/* Null terminate the initial command and step over any
additional white space. If we've hit the end of the
line, exit the loop. Otherwise, we've found the first
argument. Position the current pointer on the last known
white space. */
*ptr = '\0';
char *newptr = ptr + 1;
newptr += strspn (newptr, " \t");
if (!*newptr)
break;
arg1 = newptr;
ptr = newptr - 1;
}
}
}
UnmapViewOfFile (buf);
just_shell:
if (!pgm)
{
if (!p_type_exec)
{
/* Not called from exec[lv]p. Don't try to treat as script. */
debug_printf ("%s is not a valid executable",
real_path.get_win32 ());
set_errno (ENOEXEC);
return -1;
}
if (ascii_strcasematch (ext, ".com"))
break;
pgm = (char *) "/bin/sh";
arg1 = NULL;
}
/* Check if script is executable. Otherwise we start non-executable
scripts successfully, which is incorrect behaviour. */
if (real_path.has_acls ()
&& check_file_access (real_path, X_OK, true) < 0)
return -1; /* errno is already set. */
/* Replace argv[0] with the full path to the script if this is the
first time through the loop. */
replace0_maybe (prog_arg);
/* pointers:
* pgm interpreter name
* arg1 optional string
*/
if (arg1)
unshift (arg1);
/* FIXME: This should not be using FE_NATIVE. It should be putting
the posix path on the argv list. */
find_exec (pgm, real_path, "PATH=", FE_NATIVE, &ext);
unshift (real_path.get_win32 (), 1);
}
if (real_path.iscygexec ())
dup_all ();
return 0;
err:

1
winsup/cygwin/winf.cc
View File

@ -73,7 +73,6 @@ linebuf::fromargv (av& newargv, const char *real_path, bool cmdlenoverflow_ok)
char *p = NULL;
const char *a;
newargv.dup_maybe (i);
a = i ? newargv[i] : (char *) real_path;
int len = strlen (a);
if (len != 0 && !strpbrk (a, " \t\n\r\""))

14
winsup/cygwin/winf.h
View File

@ -34,14 +34,12 @@ class av
memcpy (argv, av_in, (argc + 1) * sizeof (char *));
}
void *operator new (size_t, void *p) __attribute__ ((nothrow)) {return p;}
void set (int ac_in, const char * const *av_in) {new (this) av (ac_in, av_in);}
~av ()
{
if (argv)
{
for (int i = 0; i < calloced; i++)
if (argv[i])
cfree (argv[i]);
cfree (argv[i]);
cfree (argv);
}
}
@ -54,20 +52,16 @@ class av
if (!calloced)
{
argv[0] = cstrdup1 (arg0);
calloced = true;
calloced = 1;
}
}
void dup_maybe (int i)
{
if (i >= calloced)
argv[i] = cstrdup1 (argv[i]);
}
void dup_all ()
{
for (int i = calloced; i < argc; i++)
argv[i] = cstrdup1 (argv[i]);
calloced = argc;
}
int fixup (const char *, path_conv&, const char *, bool);
int setup (const char *, path_conv&, const char *, int, const char *const *, bool) __reg3;
};
class linebuf