#define _LARGEFILE64_SOURCE 1
+#define PY_SSIZE_T_CLEAN 1
#undef NDEBUG
#include "../../config/config.h"
-#include "bupsplit.h"
+
+// According to Python, its header has to go first:
+// http://docs.python.org/2/c-api/intro.html#include-files
#include <Python.h>
+
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <arpa/inet.h>
+#include <stddef.h>
#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
+#endif
+#ifdef HAVE_UNISTD_H
#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
-#ifdef linux
+#ifdef HAVE_LINUX_FS_H
#include <linux/fs.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
-static int istty2 = 0;
+#ifdef HAVE_TM_TM_GMTOFF
+#include <time.h>
+#endif
+
+#include "bupsplit.h"
+
+#if defined(FS_IOC_GETFLAGS) && defined(FS_IOC_SETFLAGS)
+#define BUP_HAVE_FILE_ATTRS 1
+#endif
+
+/*
+ * Check for incomplete UTIMENSAT support (NetBSD 6), and if so,
+ * pretend we don't have it.
+ */
+#if !defined(AT_FDCWD) || !defined(AT_SYMLINK_NOFOLLOW)
+#undef HAVE_UTIMENSAT
+#endif
+
+#ifndef FS_NOCOW_FL
+// Of course, this assumes it's a bitfield value.
+#define FS_NOCOW_FL 0
+#endif
+
+
+typedef unsigned char byte;
+
+
+typedef struct {
+ int istty2;
+} state_t;
+
+// cstr_argf: for byte vectors without null characters (e.g. paths)
+// rbuf_argf: for read-only byte vectors
+// wbuf_argf: for mutable byte vectors
+
+#if PY_MAJOR_VERSION < 3
+static state_t state;
+# define get_state(x) (&state)
+# define cstr_argf "s"
+# define rbuf_argf "s#"
+# define wbuf_argf "s*"
+#else
+# define get_state(x) ((state_t *) PyModule_GetState(x))
+# define cstr_argf "y"
+# define rbuf_argf "y#"
+# define wbuf_argf "y*"
+#endif // PY_MAJOR_VERSION >= 3
+
+
+static void *checked_malloc(size_t n, size_t size)
+{
+ size_t total;
+ if (__builtin_mul_overflow(n, size, &total))
+ {
+ PyErr_Format(PyExc_OverflowError,
+ "request to allocate %lu items of size %lu is too large",
+ n, size);
+ return NULL;
+ }
+ void *result = malloc(total);
+ if (!result)
+ return PyErr_NoMemory();
+ return result;
+}
+
+static void *checked_calloc(size_t n, size_t size)
+{
+ void *result = calloc(n, size);
+ if (!result)
+ PyErr_NoMemory();
+ return result;
+}
+
+
+#ifndef htonll
+// This function should technically be macro'd out if it's going to be used
+// more than ocasionally. As of this writing, it'll actually never be called
+// in real world bup scenarios (because our packs are < MAX_INT bytes).
+static uint64_t htonll(uint64_t value)
+{
+ static const int endian_test = 42;
+
+ if (*(char *)&endian_test == endian_test) // LSB-MSB
+ return ((uint64_t)htonl(value & 0xFFFFFFFF) << 32) | htonl(value >> 32);
+ return value; // already in network byte order MSB-LSB
+}
+#endif
+
+
+// Disabling sign-compare here should be fine since we're explicitly
+// checking for a sign mismatch, i.e. if the signs don't match, then
+// it doesn't matter what the value comparison says.
+// FIXME: ... so should we reverse the order?
+#define INTEGRAL_ASSIGNMENT_FITS(dest, src) \
+ ({ \
+ _Pragma("GCC diagnostic push"); \
+ _Pragma("GCC diagnostic ignored \"-Wsign-compare\""); \
+ *(dest) = (src); \
+ int result = *(dest) == (src) && (*(dest) < 1) == ((src) < 1); \
+ _Pragma("GCC diagnostic pop"); \
+ result; \
+ })
+
+
+// At the moment any code that calls INTEGER_TO_PY() will have to
+// disable -Wtautological-compare for clang. See below.
+
+#define INTEGER_TO_PY(x) \
+ (((x) >= 0) ? PyLong_FromUnsignedLongLong(x) : PyLong_FromLongLong(x))
+
+
+
+#if PY_MAJOR_VERSION < 3
+static int bup_ulong_from_pyint(unsigned long *x, PyObject *py,
+ const char *name)
+{
+ const long tmp = PyInt_AsLong(py);
+ if (tmp == -1 && PyErr_Occurred())
+ {
+ if (PyErr_ExceptionMatches(PyExc_OverflowError))
+ PyErr_Format(PyExc_OverflowError, "%s too big for unsigned long",
+ name);
+ return 0;
+ }
+ if (tmp < 0)
+ {
+ PyErr_Format(PyExc_OverflowError,
+ "negative %s cannot be converted to unsigned long", name);
+ return 0;
+ }
+ *x = tmp;
+ return 1;
+}
+#endif
+
+
+static int bup_ulong_from_py(unsigned long *x, PyObject *py, const char *name)
+{
+#if PY_MAJOR_VERSION < 3
+ if (PyInt_Check(py))
+ return bup_ulong_from_pyint(x, py, name);
+#endif
+
+ if (!PyLong_Check(py))
+ {
+ PyErr_Format(PyExc_TypeError, "expected integer %s", name);
+ return 0;
+ }
+
+ const unsigned long tmp = PyLong_AsUnsignedLong(py);
+ if (PyErr_Occurred())
+ {
+ if (PyErr_ExceptionMatches(PyExc_OverflowError))
+ PyErr_Format(PyExc_OverflowError, "%s too big for unsigned long",
+ name);
+ return 0;
+ }
+ *x = tmp;
+ return 1;
+}
+
+
+static int bup_uint_from_py(unsigned int *x, PyObject *py, const char *name)
+{
+ unsigned long tmp;
+ if (!bup_ulong_from_py(&tmp, py, name))
+ return 0;
+
+ if (tmp > UINT_MAX)
+ {
+ PyErr_Format(PyExc_OverflowError, "%s too big for unsigned int", name);
+ return 0;
+ }
+ *x = tmp;
+ return 1;
+}
+
+static int bup_ullong_from_py(unsigned PY_LONG_LONG *x, PyObject *py,
+ const char *name)
+{
+#if PY_MAJOR_VERSION < 3
+ if (PyInt_Check(py))
+ {
+ unsigned long tmp;
+ if (bup_ulong_from_pyint(&tmp, py, name))
+ {
+ *x = tmp;
+ return 1;
+ }
+ return 0;
+ }
+#endif
+
+ if (!PyLong_Check(py))
+ {
+ PyErr_Format(PyExc_TypeError, "integer argument expected for %s", name);
+ return 0;
+ }
+
+ const unsigned PY_LONG_LONG tmp = PyLong_AsUnsignedLongLong(py);
+ if (tmp == (unsigned long long) -1 && PyErr_Occurred())
+ {
+ if (PyErr_ExceptionMatches(PyExc_OverflowError))
+ PyErr_Format(PyExc_OverflowError,
+ "%s too big for unsigned long long", name);
+ return 0;
+ }
+ *x = tmp;
+ return 1;
+}
+
+
+static PyObject *bup_bytescmp(PyObject *self, PyObject *args)
+{
+ PyObject *py_s1, *py_s2; // This is really a PyBytes/PyString
+ if (!PyArg_ParseTuple(args, "SS", &py_s1, &py_s2))
+ return NULL;
+ char *s1, *s2;
+ Py_ssize_t s1_len, s2_len;
+ if (PyBytes_AsStringAndSize(py_s1, &s1, &s1_len) == -1)
+ return NULL;
+ if (PyBytes_AsStringAndSize(py_s2, &s2, &s2_len) == -1)
+ return NULL;
+ const Py_ssize_t n = (s1_len < s2_len) ? s1_len : s2_len;
+ const int cmp = memcmp(s1, s2, n);
+ if (cmp != 0)
+ return PyLong_FromLong(cmp);
+ if (s1_len == s2_len)
+ return PyLong_FromLong(0);;
+ return PyLong_FromLong((s1_len < s2_len) ? -1 : 1);
+}
+
// Probably we should use autoconf or something and set HAVE_PY_GETARGCARGV...
#if __WIN32__ || __CYGWIN__
#endif // not __WIN32__ or __CYGWIN__
+static int write_all(int fd, const void *buf, const size_t count)
+{
+ size_t written = 0;
+ while (written < count)
+ {
+ const ssize_t rc = write(fd, buf + written, count - written);
+ if (rc == -1)
+ return -1;
+ written += rc;
+ }
+ return 0;
+}
+
+
+static int uadd(unsigned long long *dest,
+ const unsigned long long x,
+ const unsigned long long y)
+{
+ const unsigned long long result = x + y;
+ if (result < x || result < y)
+ return 0;
+ *dest = result;
+ return 1;
+}
+
+
+static PyObject *append_sparse_region(const int fd, unsigned long long n)
+{
+ while (n)
+ {
+ off_t new_off;
+ if (!INTEGRAL_ASSIGNMENT_FITS(&new_off, n))
+ new_off = INT_MAX;
+ const off_t off = lseek(fd, new_off, SEEK_CUR);
+ if (off == (off_t) -1)
+ return PyErr_SetFromErrno(PyExc_IOError);
+ n -= new_off;
+ }
+ return NULL;
+}
+
+
+static PyObject *record_sparse_zeros(unsigned long long *new_pending,
+ const int fd,
+ unsigned long long prev_pending,
+ const unsigned long long count)
+{
+ // Add count additional sparse zeros to prev_pending and store the
+ // result in new_pending, or if the total won't fit in
+ // new_pending, write some of the zeros to fd sparsely, and store
+ // the remaining sum in new_pending.
+ if (!uadd(new_pending, prev_pending, count))
+ {
+ PyObject *err = append_sparse_region(fd, prev_pending);
+ if (err != NULL)
+ return err;
+ *new_pending = count;
+ }
+ return NULL;
+}
+
+
+static byte* find_not_zero(const byte * const start, const byte * const end)
+{
+ // Return a pointer to first non-zero byte between start and end,
+ // or end if there isn't one.
+ assert(start <= end);
+ const unsigned char *cur = start;
+ while (cur < end && *cur == 0)
+ cur++;
+ return (byte *) cur;
+}
+
+
+static byte* find_trailing_zeros(const byte * const start,
+ const byte * const end)
+{
+ // Return a pointer to the start of any trailing run of zeros, or
+ // end if there isn't one.
+ assert(start <= end);
+ if (start == end)
+ return (byte *) end;
+ const byte * cur = end;
+ while (cur > start && *--cur == 0) {}
+ if (*cur == 0)
+ return (byte *) cur;
+ else
+ return (byte *) (cur + 1);
+}
+
+
+static byte *find_non_sparse_end(const byte * const start,
+ const byte * const end,
+ const ptrdiff_t min_len)
+{
+ // Return the first pointer to a min_len sparse block in [start,
+ // end) if there is one, otherwise a pointer to the start of any
+ // trailing run of zeros. If there are no trailing zeros, return
+ // end.
+ if (start == end)
+ return (byte *) end;
+ assert(start < end);
+ assert(min_len);
+ // Probe in min_len jumps, searching backward from the jump
+ // destination for a non-zero byte. If such a byte is found, move
+ // just past it and try again.
+ const byte *candidate = start;
+ // End of any run of zeros, starting at candidate, that we've already seen
+ const byte *end_of_known_zeros = candidate;
+ while (end - candidate >= min_len) // Handle all min_len candidate blocks
+ {
+ const byte * const probe_end = candidate + min_len;
+ const byte * const trailing_zeros =
+ find_trailing_zeros(end_of_known_zeros, probe_end);
+ if (trailing_zeros == probe_end)
+ end_of_known_zeros = candidate = probe_end;
+ else if (trailing_zeros == end_of_known_zeros)
+ {
+ assert(candidate >= start);
+ assert(candidate <= end);
+ assert(*candidate == 0);
+ return (byte *) candidate;
+ }
+ else
+ {
+ candidate = trailing_zeros;
+ end_of_known_zeros = probe_end;
+ }
+ }
+
+ if (candidate == end)
+ return (byte *) end;
+
+ // No min_len sparse run found, search backward from end
+ const byte * const trailing_zeros = find_trailing_zeros(end_of_known_zeros,
+ end);
+
+ if (trailing_zeros == end_of_known_zeros)
+ {
+ assert(candidate >= start);
+ assert(candidate < end);
+ assert(*candidate == 0);
+ assert(end - candidate < min_len);
+ return (byte *) candidate;
+ }
+
+ if (trailing_zeros == end)
+ {
+ assert(*(end - 1) != 0);
+ return (byte *) end;
+ }
+
+ assert(end - trailing_zeros < min_len);
+ assert(trailing_zeros >= start);
+ assert(trailing_zeros < end);
+ assert(*trailing_zeros == 0);
+ return (byte *) trailing_zeros;
+}
+
+
+static PyObject *bup_write_sparsely(PyObject *self, PyObject *args)
+{
+ int fd;
+ unsigned char *buf = NULL;
+ Py_ssize_t sbuf_len;
+ PyObject *py_min_sparse_len, *py_prev_sparse_len;
+ if (!PyArg_ParseTuple(args, "i" rbuf_argf "OO",
+ &fd, &buf, &sbuf_len,
+ &py_min_sparse_len, &py_prev_sparse_len))
+ return NULL;
+ ptrdiff_t min_sparse_len;
+ unsigned long long prev_sparse_len, buf_len, ul_min_sparse_len;
+ if (!bup_ullong_from_py(&ul_min_sparse_len, py_min_sparse_len, "min_sparse_len"))
+ return NULL;
+ if (!INTEGRAL_ASSIGNMENT_FITS(&min_sparse_len, ul_min_sparse_len))
+ return PyErr_Format(PyExc_OverflowError, "min_sparse_len too large");
+ if (!bup_ullong_from_py(&prev_sparse_len, py_prev_sparse_len, "prev_sparse_len"))
+ return NULL;
+ if (sbuf_len < 0)
+ return PyErr_Format(PyExc_ValueError, "negative bufer length");
+ if (!INTEGRAL_ASSIGNMENT_FITS(&buf_len, sbuf_len))
+ return PyErr_Format(PyExc_OverflowError, "buffer length too large");
+
+ const byte * block = buf; // Start of pending block
+ const byte * const end = buf + buf_len;
+ unsigned long long zeros = prev_sparse_len;
+ while (1)
+ {
+ assert(block <= end);
+ if (block == end)
+ return PyLong_FromUnsignedLongLong(zeros);
+
+ if (*block != 0)
+ {
+ // Look for the end of block, i.e. the next sparse run of
+ // at least min_sparse_len zeros, or the end of the
+ // buffer.
+ const byte * const probe = find_non_sparse_end(block + 1, end,
+ min_sparse_len);
+ // Either at end of block, or end of non-sparse; write pending data
+ PyObject *err = append_sparse_region(fd, zeros);
+ if (err != NULL)
+ return err;
+ int rc = write_all(fd, block, probe - block);
+ if (rc)
+ return PyErr_SetFromErrno(PyExc_IOError);
+
+ if (end - probe < min_sparse_len)
+ zeros = end - probe;
+ else
+ zeros = min_sparse_len;
+ block = probe + zeros;
+ }
+ else // *block == 0
+ {
+ // Should be in the first loop iteration, a sparse run of
+ // zeros, or nearly at the end of the block (within
+ // min_sparse_len).
+ const byte * const zeros_end = find_not_zero(block, end);
+ PyObject *err = record_sparse_zeros(&zeros, fd,
+ zeros, zeros_end - block);
+ if (err != NULL)
+ return err;
+ assert(block <= zeros_end);
+ block = zeros_end;
+ }
+ }
+}
+
+
static PyObject *selftest(PyObject *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ""))
static PyObject *splitbuf(PyObject *self, PyObject *args)
{
- unsigned char *buf = NULL;
- int len = 0, out = 0, bits = -1;
-
- if (!PyArg_ParseTuple(args, "t#", &buf, &len))
- return NULL;
- out = bupsplit_find_ofs(buf, len, &bits);
+ // We stick to buffers in python 2 because they appear to be
+ // substantially smaller than memoryviews, and because
+ // zlib.compress() in python 2 can't accept a memoryview
+ // (cf. hashsplit.py).
+ int out = 0, bits = -1;
+ if (PY_MAJOR_VERSION > 2)
+ {
+ Py_buffer buf;
+ if (!PyArg_ParseTuple(args, "y*", &buf))
+ return NULL;
+ assert(buf.len <= INT_MAX);
+ out = bupsplit_find_ofs(buf.buf, buf.len, &bits);
+ PyBuffer_Release(&buf);
+ }
+ else
+ {
+ unsigned char *buf = NULL;
+ Py_ssize_t len = 0;
+ if (!PyArg_ParseTuple(args, "t#", &buf, &len))
+ return NULL;
+ assert(len <= INT_MAX);
+ out = bupsplit_find_ofs(buf, len, &bits);
+ }
if (out) assert(bits >= BUP_BLOBBITS);
return Py_BuildValue("ii", out, bits);
}
static PyObject *bitmatch(PyObject *self, PyObject *args)
{
unsigned char *buf1 = NULL, *buf2 = NULL;
- int len1 = 0, len2 = 0;
- int byte, bit;
+ Py_ssize_t len1 = 0, len2 = 0;
+ Py_ssize_t byte;
+ int bit;
- if (!PyArg_ParseTuple(args, "t#t#", &buf1, &len1, &buf2, &len2))
+ if (!PyArg_ParseTuple(args, rbuf_argf rbuf_argf, &buf1, &len1, &buf2, &len2))
return NULL;
bit = 0;
}
}
+ assert(byte <= (INT_MAX >> 3));
return Py_BuildValue("i", byte*8 + bit);
}
static PyObject *firstword(PyObject *self, PyObject *args)
{
unsigned char *buf = NULL;
- int len = 0;
+ Py_ssize_t len = 0;
uint32_t v;
- if (!PyArg_ParseTuple(args, "t#", &buf, &len))
+ if (!PyArg_ParseTuple(args, rbuf_argf, &buf, &len))
return NULL;
if (len < 4)
#define BLOOM2_HEADERLEN 16
-typedef struct {
- uint32_t high;
- unsigned char low;
-} bits40_t;
-
-static void to_bloom_address_bitmask4(const bits40_t *buf,
+static void to_bloom_address_bitmask4(const unsigned char *buf,
const int nbits, uint64_t *v, unsigned char *bitmask)
{
int bit;
+ uint32_t high;
uint64_t raw, mask;
+ memcpy(&high, buf, 4);
mask = (1<<nbits) - 1;
- raw = (((uint64_t)ntohl(buf->high)) << 8) | buf->low;
+ raw = (((uint64_t)ntohl(high) << 8) | buf[4]);
bit = (raw >> (37-nbits)) & 0x7;
*v = (raw >> (40-nbits)) & mask;
*bitmask = 1 << bit;
}
-static void to_bloom_address_bitmask5(const uint32_t *buf,
+static void to_bloom_address_bitmask5(const unsigned char *buf,
const int nbits, uint32_t *v, unsigned char *bitmask)
{
int bit;
+ uint32_t high;
uint32_t raw, mask;
+ memcpy(&high, buf, 4);
mask = (1<<nbits) - 1;
- raw = ntohl(*buf);
+ raw = ntohl(high);
bit = (raw >> (29-nbits)) & 0x7;
*v = (raw >> (32-nbits)) & mask;
*bitmask = 1 << bit;
}
-#define BLOOM_SET_BIT(name, address, itype, otype) \
-static void name(unsigned char *bloom, const void *buf, const int nbits)\
+#define BLOOM_SET_BIT(name, address, otype) \
+static void name(unsigned char *bloom, const unsigned char *buf, const int nbits)\
{\
unsigned char bitmask;\
otype v;\
- address((itype *)buf, nbits, &v, &bitmask);\
+ address(buf, nbits, &v, &bitmask);\
bloom[BLOOM2_HEADERLEN+v] |= bitmask;\
}
-BLOOM_SET_BIT(bloom_set_bit4, to_bloom_address_bitmask4, bits40_t, uint64_t)
-BLOOM_SET_BIT(bloom_set_bit5, to_bloom_address_bitmask5, uint32_t, uint32_t)
+BLOOM_SET_BIT(bloom_set_bit4, to_bloom_address_bitmask4, uint64_t)
+BLOOM_SET_BIT(bloom_set_bit5, to_bloom_address_bitmask5, uint32_t)
-#define BLOOM_GET_BIT(name, address, itype, otype) \
-static int name(const unsigned char *bloom, const void *buf, const int nbits)\
+#define BLOOM_GET_BIT(name, address, otype) \
+static int name(const unsigned char *bloom, const unsigned char *buf, const int nbits)\
{\
unsigned char bitmask;\
otype v;\
- address((itype *)buf, nbits, &v, &bitmask);\
+ address(buf, nbits, &v, &bitmask);\
return bloom[BLOOM2_HEADERLEN+v] & bitmask;\
}
-BLOOM_GET_BIT(bloom_get_bit4, to_bloom_address_bitmask4, bits40_t, uint64_t)
-BLOOM_GET_BIT(bloom_get_bit5, to_bloom_address_bitmask5, uint32_t, uint32_t)
+BLOOM_GET_BIT(bloom_get_bit4, to_bloom_address_bitmask4, uint64_t)
+BLOOM_GET_BIT(bloom_get_bit5, to_bloom_address_bitmask5, uint32_t)
static PyObject *bloom_add(PyObject *self, PyObject *args)
{
- unsigned char *sha = NULL, *bloom = NULL;
- unsigned char *end;
- int len = 0, blen = 0, nbits = 0, k = 0;
+ Py_buffer bloom, sha;
+ int nbits = 0, k = 0;
+ if (!PyArg_ParseTuple(args, wbuf_argf wbuf_argf "ii",
+ &bloom, &sha, &nbits, &k))
+ return NULL;
- if (!PyArg_ParseTuple(args, "w#s#ii", &bloom, &blen, &sha, &len, &nbits, &k))
- return NULL;
+ PyObject *result = NULL;
- if (blen < 16+(1<<nbits) || len % 20 != 0)
- return NULL;
+ if (bloom.len < 16+(1<<nbits) || sha.len % 20 != 0)
+ goto clean_and_return;
if (k == 5)
{
- if (nbits > 29)
- return NULL;
- for (end = sha + len; sha < end; sha += 20/k)
- bloom_set_bit5(bloom, sha, nbits);
+ if (nbits > 29)
+ goto clean_and_return;
+ unsigned char *cur = sha.buf;
+ unsigned char *end;
+ for (end = cur + sha.len; cur < end; cur += 20/k)
+ bloom_set_bit5(bloom.buf, cur, nbits);
}
else if (k == 4)
{
- if (nbits > 37)
- return NULL;
- for (end = sha + len; sha < end; sha += 20/k)
- bloom_set_bit4(bloom, sha, nbits);
+ if (nbits > 37)
+ goto clean_and_return;
+ unsigned char *cur = sha.buf;
+ unsigned char *end = cur + sha.len;
+ for (; cur < end; cur += 20/k)
+ bloom_set_bit4(bloom.buf, cur, nbits);
}
else
- return NULL;
+ goto clean_and_return;
+ result = Py_BuildValue("n", sha.len / 20);
- return Py_BuildValue("i", len/20);
+ clean_and_return:
+ PyBuffer_Release(&bloom);
+ PyBuffer_Release(&sha);
+ return result;
}
static PyObject *bloom_contains(PyObject *self, PyObject *args)
{
- unsigned char *sha = NULL, *bloom = NULL;
- int len = 0, blen = 0, nbits = 0, k = 0;
- unsigned char *end;
- int steps;
+ Py_buffer bloom;
+ unsigned char *sha = NULL;
+ Py_ssize_t len = 0;
+ int nbits = 0, k = 0;
+ if (!PyArg_ParseTuple(args, wbuf_argf rbuf_argf "ii",
+ &bloom, &sha, &len, &nbits, &k))
+ return NULL;
- if (!PyArg_ParseTuple(args, "t#s#ii", &bloom, &blen, &sha, &len, &nbits, &k))
- return NULL;
+ PyObject *result = NULL;
if (len != 20)
- return NULL;
+ goto clean_and_return;
if (k == 5)
{
- if (nbits > 29)
- return NULL;
- for (steps = 1, end = sha + 20; sha < end; sha += 20/k, steps++)
- if (!bloom_get_bit5(bloom, sha, nbits))
- return Py_BuildValue("Oi", Py_None, steps);
+ if (nbits > 29)
+ goto clean_and_return;
+ int steps;
+ unsigned char *end;
+ for (steps = 1, end = sha + 20; sha < end; sha += 20/k, steps++)
+ if (!bloom_get_bit5(bloom.buf, sha, nbits))
+ {
+ result = Py_BuildValue("Oi", Py_None, steps);
+ goto clean_and_return;
+ }
}
else if (k == 4)
{
- if (nbits > 37)
- return NULL;
- for (steps = 1, end = sha + 20; sha < end; sha += 20/k, steps++)
- if (!bloom_get_bit4(bloom, sha, nbits))
- return Py_BuildValue("Oi", Py_None, steps);
+ if (nbits > 37)
+ goto clean_and_return;
+ int steps;
+ unsigned char *end;
+ for (steps = 1, end = sha + 20; sha < end; sha += 20/k, steps++)
+ if (!bloom_get_bit4(bloom.buf, sha, nbits))
+ {
+ result = Py_BuildValue("Oi", Py_None, steps);
+ goto clean_and_return;
+ }
}
else
- return NULL;
+ goto clean_and_return;
+
+ result = Py_BuildValue("ii", 1, k);
- return Py_BuildValue("ii", 1, k);
+ clean_and_return:
+ PyBuffer_Release(&bloom);
+ return result;
}
v = (v >> (32-nbits)) & mask;
return v;
}
+
+
static PyObject *extract_bits(PyObject *self, PyObject *args)
{
unsigned char *buf = NULL;
- int len = 0, nbits = 0;
+ Py_ssize_t len = 0;
+ int nbits = 0;
- if (!PyArg_ParseTuple(args, "t#i", &buf, &len, &nbits))
+ if (!PyArg_ParseTuple(args, rbuf_argf "i", &buf, &len, &nbits))
return NULL;
if (len < 4)
struct sha {
unsigned char bytes[20];
};
+
+static inline int _cmp_sha(const struct sha *sha1, const struct sha *sha2)
+{
+ return memcmp(sha1->bytes, sha2->bytes, sizeof(sha1->bytes));
+}
+
+
struct idx {
unsigned char *map;
struct sha *cur;
struct sha *end;
uint32_t *cur_name;
- long bytes;
+ Py_ssize_t bytes;
int name_base;
};
-
-static int _cmp_sha(const struct sha *sha1, const struct sha *sha2)
-{
- int i;
- for (i = 0; i < sizeof(struct sha); i++)
- if (sha1->bytes[i] != sha2->bytes[i])
- return sha1->bytes[i] - sha2->bytes[i];
- return 0;
-}
-
-
-static void _fix_idx_order(struct idx **idxs, int *last_i)
+static void _fix_idx_order(struct idx **idxs, Py_ssize_t *last_i)
{
struct idx *idx;
int low, mid, high, c = 0;
static PyObject *merge_into(PyObject *self, PyObject *args)
{
- PyObject *ilist = NULL;
- unsigned char *fmap = NULL;
struct sha *sha_ptr, *sha_start = NULL;
uint32_t *table_ptr, *name_ptr, *name_start;
- struct idx **idxs = NULL;
- int flen = 0, bits = 0, i;
- uint32_t total, count, prefix;
- int num_i;
- int last_i;
+ int i;
+ unsigned int total;
+ uint32_t count, prefix;
+
- if (!PyArg_ParseTuple(args, "w#iIO", &fmap, &flen, &bits, &total, &ilist))
+ Py_buffer fmap;
+ int bits;;
+ PyObject *py_total, *ilist = NULL;
+ if (!PyArg_ParseTuple(args, wbuf_argf "iOO",
+ &fmap, &bits, &py_total, &ilist))
return NULL;
+ PyObject *result = NULL;
+ struct idx **idxs = NULL;
+ Py_ssize_t num_i = 0;
+ int *idx_buf_init = NULL;
+ Py_buffer *idx_buf = NULL;
+
+ if (!bup_uint_from_py(&total, py_total, "total"))
+ goto clean_and_return;
+
num_i = PyList_Size(ilist);
- idxs = (struct idx **)PyMem_Malloc(num_i * sizeof(struct idx *));
+
+ if (!(idxs = checked_malloc(num_i, sizeof(struct idx *))))
+ goto clean_and_return;
+ if (!(idx_buf_init = checked_calloc(num_i, sizeof(int))))
+ goto clean_and_return;
+ if (!(idx_buf = checked_malloc(num_i, sizeof(Py_buffer))))
+ goto clean_and_return;
for (i = 0; i < num_i; i++)
{
long len, sha_ofs, name_map_ofs;
- idxs[i] = (struct idx *)PyMem_Malloc(sizeof(struct idx));
+ if (!(idxs[i] = checked_malloc(1, sizeof(struct idx))))
+ goto clean_and_return;
PyObject *itup = PyList_GetItem(ilist, i);
- if (!PyArg_ParseTuple(itup, "t#llli", &idxs[i]->map, &idxs[i]->bytes,
- &len, &sha_ofs, &name_map_ofs, &idxs[i]->name_base))
+ if (!PyArg_ParseTuple(itup, wbuf_argf "llli",
+ &(idx_buf[i]), &len, &sha_ofs, &name_map_ofs,
+ &idxs[i]->name_base))
return NULL;
+ idx_buf_init[i] = 1;
+ idxs[i]->map = idx_buf[i].buf;
+ idxs[i]->bytes = idx_buf[i].len;
idxs[i]->cur = (struct sha *)&idxs[i]->map[sha_ofs];
idxs[i]->end = &idxs[i]->cur[len];
if (name_map_ofs)
else
idxs[i]->cur_name = NULL;
}
- table_ptr = (uint32_t *)&fmap[MIDX4_HEADERLEN];
+ table_ptr = (uint32_t *) &((unsigned char *) fmap.buf)[MIDX4_HEADERLEN];
sha_start = sha_ptr = (struct sha *)&table_ptr[1<<bits];
name_start = name_ptr = (uint32_t *)&sha_ptr[total];
- last_i = num_i-1;
+ Py_ssize_t last_i = num_i - 1;
count = 0;
prefix = 0;
while (last_i >= 0)
{
struct idx *idx;
uint32_t new_prefix;
- if (count % 102424 == 0 && istty2)
+ if (count % 102424 == 0 && get_state(self)->istty2)
fprintf(stderr, "midx: writing %.2f%% (%d/%d)\r",
count*100.0/total, count, total);
idx = idxs[last_i];
_fix_idx_order(idxs, &last_i);
++count;
}
- while (prefix < (1<<bits))
+ while (prefix < ((uint32_t) 1 << bits))
table_ptr[prefix++] = htonl(count);
assert(count == total);
- assert(prefix == (1<<bits));
+ assert(prefix == ((uint32_t) 1 << bits));
assert(sha_ptr == sha_start+count);
assert(name_ptr == name_start+count);
- PyMem_Free(idxs);
- return PyLong_FromUnsignedLong(count);
-}
-
-// This function should technically be macro'd out if it's going to be used
-// more than ocasionally. As of this writing, it'll actually never be called
-// in real world bup scenarios (because our packs are < MAX_INT bytes).
-static uint64_t htonll(uint64_t value)
-{
- static const int endian_test = 42;
+ result = PyLong_FromUnsignedLong(count);
- if (*(char *)&endian_test == endian_test) // LSB-MSB
- return ((uint64_t)htonl(value & 0xFFFFFFFF) << 32) | htonl(value >> 32);
- return value; // already in network byte order MSB-LSB
+ clean_and_return:
+ if (idx_buf_init)
+ {
+ for (i = 0; i < num_i; i++)
+ if (idx_buf_init[i])
+ PyBuffer_Release(&(idx_buf[i]));
+ free(idx_buf_init);
+ free(idx_buf);
+ }
+ if (idxs)
+ {
+ for (i = 0; i < num_i; i++)
+ free(idxs[i]);
+ free(idxs);
+ }
+ PyBuffer_Release(&fmap);
+ return result;
}
-#define PACK_IDX_V2_HEADERLEN 8
#define FAN_ENTRIES 256
static PyObject *write_idx(PyObject *self, PyObject *args)
{
- PyObject *pf = NULL, *idx = NULL;
+ char *filename = NULL;
+ PyObject *py_total, *idx = NULL;
PyObject *part;
- FILE *f;
- unsigned char *fmap = NULL;
- int flen = 0;
- uint32_t total = 0;
+ unsigned int total = 0;
uint32_t count;
int i, j, ofs64_count;
uint32_t *fan_ptr, *crc_ptr, *ofs_ptr;
+ uint64_t *ofs64_ptr;
struct sha *sha_ptr;
- if (!PyArg_ParseTuple(args, "Ow#OI", &pf, &fmap, &flen, &idx, &total))
+ Py_buffer fmap;
+ if (!PyArg_ParseTuple(args, cstr_argf wbuf_argf "OO",
+ &filename, &fmap, &idx, &py_total))
return NULL;
- fan_ptr = (uint32_t *)&fmap[PACK_IDX_V2_HEADERLEN];
+ PyObject *result = NULL;
+
+ if (!bup_uint_from_py(&total, py_total, "total"))
+ goto clean_and_return;
+
+ if (PyList_Size (idx) != FAN_ENTRIES) // Check for list of the right length.
+ {
+ result = PyErr_Format (PyExc_TypeError, "idx must contain %d entries",
+ FAN_ENTRIES);
+ goto clean_and_return;
+ }
+
+ const char idx_header[] = "\377tOc\0\0\0\002";
+ memcpy (fmap.buf, idx_header, sizeof(idx_header) - 1);
+
+ fan_ptr = (uint32_t *)&((unsigned char *)fmap.buf)[sizeof(idx_header) - 1];
sha_ptr = (struct sha *)&fan_ptr[FAN_ENTRIES];
crc_ptr = (uint32_t *)&sha_ptr[total];
ofs_ptr = (uint32_t *)&crc_ptr[total];
- f = PyFile_AsFile(pf);
+ ofs64_ptr = (uint64_t *)&ofs_ptr[total];
count = 0;
ofs64_count = 0;
for (j = 0; j < plen; ++j)
{
unsigned char *sha = NULL;
- int sha_len = 0;
- uint32_t crc = 0;
- uint64_t ofs = 0;
- if (!PyArg_ParseTuple(PyList_GET_ITEM(part, j), "t#IK",
- &sha, &sha_len, &crc, &ofs))
- return NULL;
+ Py_ssize_t sha_len = 0;
+ PyObject *crc_py, *ofs_py;
+ unsigned int crc;
+ unsigned PY_LONG_LONG ofs_ull;
+ uint64_t ofs;
+ if (!PyArg_ParseTuple(PyList_GET_ITEM(part, j), rbuf_argf "OO",
+ &sha, &sha_len, &crc_py, &ofs_py))
+ goto clean_and_return;
+ if(!bup_uint_from_py(&crc, crc_py, "crc"))
+ goto clean_and_return;
+ if(!bup_ullong_from_py(&ofs_ull, ofs_py, "ofs"))
+ goto clean_and_return;
+ assert(crc <= UINT32_MAX);
+ assert(ofs_ull <= UINT64_MAX);
+ ofs = ofs_ull;
if (sha_len != sizeof(struct sha))
- return NULL;
+ goto clean_and_return;
memcpy(sha_ptr++, sha, sizeof(struct sha));
*crc_ptr++ = htonl(crc);
if (ofs > 0x7fffffff)
{
- uint64_t nofs = htonll(ofs);
- if (fwrite(&nofs, sizeof(uint64_t), 1, f) != 1)
- return PyErr_SetFromErrno(PyExc_OSError);
+ *ofs64_ptr++ = htonll(ofs);
ofs = 0x80000000 | ofs64_count++;
}
*ofs_ptr++ = htonl((uint32_t)ofs);
}
}
- return PyLong_FromUnsignedLong(count);
+
+ int rc = msync(fmap.buf, fmap.len, MS_ASYNC);
+ if (rc != 0)
+ {
+ result = PyErr_SetFromErrnoWithFilename(PyExc_IOError, filename);
+ goto clean_and_return;
+ }
+
+ result = PyLong_FromUnsignedLong(count);
+
+ clean_and_return:
+ PyBuffer_Release(&fmap);
+ return result;
}
memset(shabuf, 0, sizeof(shabuf));
for (i=0; i < 20/4; i++)
shabuf[i] = random();
- return Py_BuildValue("s#", shabuf, 20);
+ return Py_BuildValue(rbuf_argf, shabuf, 20);
}
-static PyObject *open_noatime(PyObject *self, PyObject *args)
+static int _open_noatime(const char *filename, int attrs)
{
- char *filename = NULL;
- int attrs, attrs_noatime, fd;
- if (!PyArg_ParseTuple(args, "s", &filename))
- return NULL;
- attrs = O_RDONLY;
+ int attrs_noatime, fd;
+ attrs |= O_RDONLY;
#ifdef O_NOFOLLOW
attrs |= O_NOFOLLOW;
#endif
// just harmlessly ignore it, so this branch won't trigger)
fd = open(filename, attrs);
}
+ return fd;
+}
+
+
+static PyObject *open_noatime(PyObject *self, PyObject *args)
+{
+ char *filename = NULL;
+ int fd;
+ if (!PyArg_ParseTuple(args, cstr_argf, &filename))
+ return NULL;
+ fd = _open_noatime(filename, 0);
if (fd < 0)
return PyErr_SetFromErrnoWithFilename(PyExc_OSError, filename);
return Py_BuildValue("i", fd);
static PyObject *fadvise_done(PyObject *self, PyObject *args)
{
int fd = -1;
- long long ofs = 0;
- if (!PyArg_ParseTuple(args, "iL", &fd, &ofs))
+ long long llofs, lllen = 0;
+ if (!PyArg_ParseTuple(args, "iLL", &fd, &llofs, &lllen))
return NULL;
+ off_t ofs, len;
+ if (!INTEGRAL_ASSIGNMENT_FITS(&ofs, llofs))
+ return PyErr_Format(PyExc_OverflowError,
+ "fadvise offset overflows off_t");
+ if (!INTEGRAL_ASSIGNMENT_FITS(&len, lllen))
+ return PyErr_Format(PyExc_OverflowError,
+ "fadvise length overflows off_t");
#ifdef POSIX_FADV_DONTNEED
- posix_fadvise(fd, 0, ofs, POSIX_FADV_DONTNEED);
+ posix_fadvise(fd, ofs, len, POSIX_FADV_DONTNEED);
#endif
return Py_BuildValue("");
}
-#if defined(linux) && defined(FS_IOC_GETFLAGS)
+// Currently the Linux kernel and FUSE disagree over the type for
+// FS_IOC_GETFLAGS and FS_IOC_SETFLAGS. The kernel actually uses int,
+// but FUSE chose long (matching the declaration in linux/fs.h). So
+// if you use int, and then traverse a FUSE filesystem, you may
+// corrupt the stack. But if you use long, then you may get invalid
+// results on big-endian systems.
+//
+// For now, we just use long, and then disable Linux attrs entirely
+// (with a warning) in helpers.py on systems that are affected.
+
+#ifdef BUP_HAVE_FILE_ATTRS
static PyObject *bup_get_linux_file_attr(PyObject *self, PyObject *args)
{
int rc;
char *path;
int fd;
- if (!PyArg_ParseTuple(args, "s", &path))
+ if (!PyArg_ParseTuple(args, cstr_argf, &path))
return NULL;
- fd = open(path, O_RDONLY | O_NONBLOCK | O_LARGEFILE | O_NOFOLLOW);
+ fd = _open_noatime(path, O_NONBLOCK);
if (fd == -1)
return PyErr_SetFromErrnoWithFilename(PyExc_OSError, path);
- attr = 0;
+ attr = 0; // Handle int/long mismatch (see above)
rc = ioctl(fd, FS_IOC_GETFLAGS, &attr);
if (rc == -1)
{
close(fd);
return PyErr_SetFromErrnoWithFilename(PyExc_OSError, path);
}
-
close(fd);
- return Py_BuildValue("k", attr);
+ assert(attr <= UINT_MAX); // Kernel type is actually int
+ return PyLong_FromUnsignedLong(attr);
}
+#endif /* def BUP_HAVE_FILE_ATTRS */
+
+#ifdef BUP_HAVE_FILE_ATTRS
static PyObject *bup_set_linux_file_attr(PyObject *self, PyObject *args)
{
int rc;
- unsigned long attr;
+ unsigned long orig_attr;
+ unsigned int attr;
char *path;
+ PyObject *py_attr;
int fd;
- if (!PyArg_ParseTuple(args, "sk", &path, &attr))
+ if (!PyArg_ParseTuple(args, cstr_argf "O", &path, &py_attr))
+ return NULL;
+
+ if (!bup_uint_from_py(&attr, py_attr, "attr"))
return NULL;
fd = open(path, O_RDONLY | O_NONBLOCK | O_LARGEFILE | O_NOFOLLOW);
if (fd == -1)
return PyErr_SetFromErrnoWithFilename(PyExc_OSError, path);
+ // Restrict attr to modifiable flags acdeijstuADST -- see
+ // chattr(1) and the e2fsprogs source. Letter to flag mapping is
+ // in pf.c flags_array[].
+ attr &= FS_APPEND_FL | FS_COMPR_FL | FS_NODUMP_FL | FS_EXTENT_FL
+ | FS_IMMUTABLE_FL | FS_JOURNAL_DATA_FL | FS_SECRM_FL | FS_NOTAIL_FL
+ | FS_UNRM_FL | FS_NOATIME_FL | FS_DIRSYNC_FL | FS_SYNC_FL
+ | FS_TOPDIR_FL | FS_NOCOW_FL;
+
+ // The extents flag can't be removed, so don't (see chattr(1) and chattr.c).
+ orig_attr = 0; // Handle int/long mismatch (see above)
+ rc = ioctl(fd, FS_IOC_GETFLAGS, &orig_attr);
+ if (rc == -1)
+ {
+ close(fd);
+ return PyErr_SetFromErrnoWithFilename(PyExc_OSError, path);
+ }
+ assert(orig_attr <= UINT_MAX); // Kernel type is actually int
+ attr |= ((unsigned int) orig_attr) & FS_EXTENT_FL;
+
rc = ioctl(fd, FS_IOC_SETFLAGS, &attr);
if (rc == -1)
{
close(fd);
return Py_BuildValue("O", Py_None);
}
-#endif /* def linux */
+#endif /* def BUP_HAVE_FILE_ATTRS */
+
+
+#ifndef HAVE_UTIMENSAT
+#ifndef HAVE_UTIMES
+#error "cannot find utimensat or utimes()"
+#endif
+#ifndef HAVE_LUTIMES
+#error "cannot find utimensat or lutimes()"
+#endif
+#endif
+
+#define ASSIGN_PYLONG_TO_INTEGRAL(dest, pylong, overflow) \
+ ({ \
+ int result = 0; \
+ *(overflow) = 0; \
+ const long long lltmp = PyLong_AsLongLong(pylong); \
+ if (lltmp == -1 && PyErr_Occurred()) \
+ { \
+ if (PyErr_ExceptionMatches(PyExc_OverflowError)) \
+ { \
+ const unsigned long long ulltmp = PyLong_AsUnsignedLongLong(pylong); \
+ if (ulltmp == (unsigned long long) -1 && PyErr_Occurred()) \
+ { \
+ if (PyErr_ExceptionMatches(PyExc_OverflowError)) \
+ { \
+ PyErr_Clear(); \
+ *(overflow) = 1; \
+ } \
+ } \
+ if (INTEGRAL_ASSIGNMENT_FITS((dest), ulltmp)) \
+ result = 1; \
+ else \
+ *(overflow) = 1; \
+ } \
+ } \
+ else \
+ { \
+ if (INTEGRAL_ASSIGNMENT_FITS((dest), lltmp)) \
+ result = 1; \
+ else \
+ *(overflow) = 1; \
+ } \
+ result; \
+ })
+
#ifdef HAVE_UTIMENSAT
-#if defined(_ATFILE_SOURCE) \
- || _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
-#define HAVE_BUP_UTIMENSAT 1
static PyObject *bup_utimensat(PyObject *self, PyObject *args)
{
- int rc, dirfd, flags;
+ int rc;
+ int fd, flag;
char *path;
- long access, access_ns, modification, modification_ns;
+ PyObject *access_py, *modification_py;
struct timespec ts[2];
- if (!PyArg_ParseTuple(args, "is((ll)(ll))i",
- &dirfd,
+ if (!PyArg_ParseTuple(args, "i" cstr_argf "((Ol)(Ol))i",
+ &fd,
&path,
- &access, &access_ns,
- &modification, &modification_ns,
- &flags))
+ &access_py, &(ts[0].tv_nsec),
+ &modification_py, &(ts[1].tv_nsec),
+ &flag))
return NULL;
- if (isnan(access))
- {
- PyErr_SetString(PyExc_ValueError, "access time is NaN");
- return NULL;
- }
- else if (isinf(access))
- {
- PyErr_SetString(PyExc_ValueError, "access time is infinite");
- return NULL;
- }
- else if (isnan(modification))
+ int overflow;
+ if (!ASSIGN_PYLONG_TO_INTEGRAL(&(ts[0].tv_sec), access_py, &overflow))
{
- PyErr_SetString(PyExc_ValueError, "modification time is NaN");
+ if (overflow)
+ PyErr_SetString(PyExc_ValueError,
+ "unable to convert access time seconds for utimensat");
return NULL;
}
- else if (isinf(modification))
+ if (!ASSIGN_PYLONG_TO_INTEGRAL(&(ts[1].tv_sec), modification_py, &overflow))
{
- PyErr_SetString(PyExc_ValueError, "modification time is infinite");
+ if (overflow)
+ PyErr_SetString(PyExc_ValueError,
+ "unable to convert modification time seconds for utimensat");
return NULL;
}
+ rc = utimensat(fd, path, ts, flag);
+ if (rc != 0)
+ return PyErr_SetFromErrnoWithFilename(PyExc_OSError, path);
+
+ return Py_BuildValue("O", Py_None);
+}
- if (isnan(access_ns))
+#endif /* def HAVE_UTIMENSAT */
+
+
+#if defined(HAVE_UTIMES) || defined(HAVE_LUTIMES)
+
+static int bup_parse_xutimes_args(char **path,
+ struct timeval tv[2],
+ PyObject *args)
+{
+ PyObject *access_py, *modification_py;
+ long long access_us, modification_us; // POSIX guarantees tv_usec is signed.
+
+ if (!PyArg_ParseTuple(args, cstr_argf "((OL)(OL))",
+ path,
+ &access_py, &access_us,
+ &modification_py, &modification_us))
+ return 0;
+
+ int overflow;
+ if (!ASSIGN_PYLONG_TO_INTEGRAL(&(tv[0].tv_sec), access_py, &overflow))
{
- PyErr_SetString(PyExc_ValueError, "access time ns is NaN");
- return NULL;
+ if (overflow)
+ PyErr_SetString(PyExc_ValueError, "unable to convert access time seconds to timeval");
+ return 0;
}
- else if (isinf(access_ns))
+ if (!INTEGRAL_ASSIGNMENT_FITS(&(tv[0].tv_usec), access_us))
{
- PyErr_SetString(PyExc_ValueError, "access time ns is infinite");
- return NULL;
+ PyErr_SetString(PyExc_ValueError, "unable to convert access time nanoseconds to timeval");
+ return 0;
}
- else if (isnan(modification_ns))
+ if (!ASSIGN_PYLONG_TO_INTEGRAL(&(tv[1].tv_sec), modification_py, &overflow))
{
- PyErr_SetString(PyExc_ValueError, "modification time ns is NaN");
- return NULL;
+ if (overflow)
+ PyErr_SetString(PyExc_ValueError, "unable to convert modification time seconds to timeval");
+ return 0;
}
- else if (isinf(modification_ns))
+ if (!INTEGRAL_ASSIGNMENT_FITS(&(tv[1].tv_usec), modification_us))
{
- PyErr_SetString(PyExc_ValueError, "modification time ns is infinite");
- return NULL;
+ PyErr_SetString(PyExc_ValueError, "unable to convert modification time nanoseconds to timeval");
+ return 0;
}
+ return 1;
+}
+
+#endif /* defined(HAVE_UTIMES) || defined(HAVE_LUTIMES) */
- ts[0].tv_sec = access;
- ts[0].tv_nsec = access_ns;
- ts[1].tv_sec = modification;
- ts[1].tv_nsec = modification_ns;
- rc = utimensat(dirfd, path, ts, flags);
+#ifdef HAVE_UTIMES
+static PyObject *bup_utimes(PyObject *self, PyObject *args)
+{
+ char *path;
+ struct timeval tv[2];
+ if (!bup_parse_xutimes_args(&path, tv, args))
+ return NULL;
+ int rc = utimes(path, tv);
if (rc != 0)
return PyErr_SetFromErrnoWithFilename(PyExc_OSError, path);
-
return Py_BuildValue("O", Py_None);
}
+#endif /* def HAVE_UTIMES */
-#endif /* defined(_ATFILE_SOURCE)
- || _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L */
-#endif /* HAVE_UTIMENSAT */
-static PyObject *stat_struct_to_py(const struct stat *st)
+#ifdef HAVE_LUTIMES
+static PyObject *bup_lutimes(PyObject *self, PyObject *args)
{
- /* Enforce the current timespec nanosecond range expectations. */
- if (st->st_atim.tv_nsec < 0 || st->st_atim.tv_nsec > 999999999)
- {
- PyErr_SetString(PyExc_ValueError, "invalid atime timespec nanoseconds");
- return NULL;
- }
- if (st->st_mtim.tv_nsec < 0 || st->st_mtim.tv_nsec > 999999999)
- {
- PyErr_SetString(PyExc_ValueError, "invalid mtime timespec nanoseconds");
- return NULL;
- }
- if (st->st_ctim.tv_nsec < 0 || st->st_ctim.tv_nsec > 999999999)
- {
- PyErr_SetString(PyExc_ValueError, "invalid ctime timespec nanoseconds");
+ char *path;
+ struct timeval tv[2];
+ if (!bup_parse_xutimes_args(&path, tv, args))
return NULL;
- }
+ int rc = lutimes(path, tv);
+ if (rc != 0)
+ return PyErr_SetFromErrnoWithFilename(PyExc_OSError, path);
+
+ return Py_BuildValue("O", Py_None);
+}
+#endif /* def HAVE_LUTIMES */
+
+
+#ifdef HAVE_STAT_ST_ATIM
+# define BUP_STAT_ATIME_NS(st) (st)->st_atim.tv_nsec
+# define BUP_STAT_MTIME_NS(st) (st)->st_mtim.tv_nsec
+# define BUP_STAT_CTIME_NS(st) (st)->st_ctim.tv_nsec
+#elif defined HAVE_STAT_ST_ATIMENSEC
+# define BUP_STAT_ATIME_NS(st) (st)->st_atimespec.tv_nsec
+# define BUP_STAT_MTIME_NS(st) (st)->st_mtimespec.tv_nsec
+# define BUP_STAT_CTIME_NS(st) (st)->st_ctimespec.tv_nsec
+#else
+# define BUP_STAT_ATIME_NS(st) 0
+# define BUP_STAT_MTIME_NS(st) 0
+# define BUP_STAT_CTIME_NS(st) 0
+#endif
- return Py_BuildValue("kkkkkkkk(Ll)(Ll)(Ll)",
- (unsigned long) st->st_mode,
- (unsigned long) st->st_ino,
- (unsigned long) st->st_dev,
- (unsigned long) st->st_nlink,
- (unsigned long) st->st_uid,
- (unsigned long) st->st_gid,
- (unsigned long) st->st_rdev,
- (unsigned long) st->st_size,
- (long long) st->st_atime,
- (long) st->st_atim.tv_nsec,
- (long long) st->st_mtime,
- (long) st->st_mtim.tv_nsec,
- (long long) st->st_ctime,
- (long) st->st_ctim.tv_nsec);
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wtautological-compare" // For INTEGER_TO_PY().
+
+static PyObject *stat_struct_to_py(const struct stat *st,
+ const char *filename,
+ int fd)
+{
+ // We can check the known (via POSIX) signed and unsigned types at
+ // compile time, but not (easily) the unspecified types, so handle
+ // those via INTEGER_TO_PY(). Assumes ns values will fit in a
+ // long.
+ return Py_BuildValue("NKNNNNNL(Nl)(Nl)(Nl)",
+ INTEGER_TO_PY(st->st_mode),
+ (unsigned PY_LONG_LONG) st->st_ino,
+ INTEGER_TO_PY(st->st_dev),
+ INTEGER_TO_PY(st->st_nlink),
+ INTEGER_TO_PY(st->st_uid),
+ INTEGER_TO_PY(st->st_gid),
+ INTEGER_TO_PY(st->st_rdev),
+ (PY_LONG_LONG) st->st_size,
+ INTEGER_TO_PY(st->st_atime),
+ (long) BUP_STAT_ATIME_NS(st),
+ INTEGER_TO_PY(st->st_mtime),
+ (long) BUP_STAT_MTIME_NS(st),
+ INTEGER_TO_PY(st->st_ctime),
+ (long) BUP_STAT_CTIME_NS(st));
}
+#pragma clang diagnostic pop // ignored "-Wtautological-compare"
static PyObject *bup_stat(PyObject *self, PyObject *args)
{
int rc;
char *filename;
- if (!PyArg_ParseTuple(args, "s", &filename))
+ if (!PyArg_ParseTuple(args, cstr_argf, &filename))
return NULL;
struct stat st;
rc = stat(filename, &st);
if (rc != 0)
return PyErr_SetFromErrnoWithFilename(PyExc_OSError, filename);
- return stat_struct_to_py(&st);
+ return stat_struct_to_py(&st, filename, 0);
}
int rc;
char *filename;
- if (!PyArg_ParseTuple(args, "s", &filename))
+ if (!PyArg_ParseTuple(args, cstr_argf, &filename))
return NULL;
struct stat st;
rc = lstat(filename, &st);
if (rc != 0)
return PyErr_SetFromErrnoWithFilename(PyExc_OSError, filename);
- return stat_struct_to_py(&st);
+ return stat_struct_to_py(&st, filename, 0);
}
rc = fstat(fd, &st);
if (rc != 0)
return PyErr_SetFromErrno(PyExc_OSError);
- return stat_struct_to_py(&st);
+ return stat_struct_to_py(&st, NULL, fd);
}
+#ifdef HAVE_TM_TM_GMTOFF
+static PyObject *bup_localtime(PyObject *self, PyObject *args)
+{
+ long long lltime;
+ time_t ttime;
+ if (!PyArg_ParseTuple(args, "L", &lltime))
+ return NULL;
+ if (!INTEGRAL_ASSIGNMENT_FITS(&ttime, lltime))
+ return PyErr_Format(PyExc_OverflowError, "time value too large");
+
+ struct tm tm;
+ tzset();
+ if(localtime_r(&ttime, &tm) == NULL)
+ return PyErr_SetFromErrno(PyExc_OSError);
+
+ // Match the Python struct_time values.
+ return Py_BuildValue("[i,i,i,i,i,i,i,i,i,i,s]",
+ 1900 + tm.tm_year, tm.tm_mon + 1, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec,
+ tm.tm_wday, tm.tm_yday + 1,
+ tm.tm_isdst, tm.tm_gmtoff, tm.tm_zone);
+}
+#endif /* def HAVE_TM_TM_GMTOFF */
+
+
+#ifdef BUP_MINCORE_BUF_TYPE
+static PyObject *bup_mincore(PyObject *self, PyObject *args)
+{
+ Py_buffer src, dest;
+ PyObject *py_src_n, *py_src_off, *py_dest_off;
+
+ if (!PyArg_ParseTuple(args, cstr_argf "*OOw*O",
+ &src, &py_src_n, &py_src_off,
+ &dest, &py_dest_off))
+ return NULL;
+
+ PyObject *result = NULL;
+
+ unsigned long long src_n, src_off, dest_off;
+ if (!(bup_ullong_from_py(&src_n, py_src_n, "src_n")
+ && bup_ullong_from_py(&src_off, py_src_off, "src_off")
+ && bup_ullong_from_py(&dest_off, py_dest_off, "dest_off")))
+ goto clean_and_return;
+
+ unsigned long long src_region_end;
+ if (!uadd(&src_region_end, src_off, src_n)) {
+ result = PyErr_Format(PyExc_OverflowError, "(src_off + src_n) too large");
+ goto clean_and_return;
+ }
+ assert(src.len >= 0);
+ if (src_region_end > (unsigned long long) src.len) {
+ result = PyErr_Format(PyExc_OverflowError, "region runs off end of src");
+ goto clean_and_return;
+ }
+
+ unsigned long long dest_size;
+ if (!INTEGRAL_ASSIGNMENT_FITS(&dest_size, dest.len)) {
+ result = PyErr_Format(PyExc_OverflowError, "invalid dest size");
+ goto clean_and_return;
+ }
+ if (dest_off > dest_size) {
+ result = PyErr_Format(PyExc_OverflowError, "region runs off end of dest");
+ goto clean_and_return;
+ }
+
+ size_t length;
+ if (!INTEGRAL_ASSIGNMENT_FITS(&length, src_n)) {
+ result = PyErr_Format(PyExc_OverflowError, "src_n overflows size_t");
+ goto clean_and_return;
+ }
+ int rc = mincore((void *)(src.buf + src_off), src_n,
+ (BUP_MINCORE_BUF_TYPE *) (dest.buf + dest_off));
+ if (rc != 0) {
+ result = PyErr_SetFromErrno(PyExc_OSError);
+ goto clean_and_return;
+ }
+ result = Py_BuildValue("O", Py_None);
+
+ clean_and_return:
+ PyBuffer_Release(&src);
+ PyBuffer_Release(&dest);
+ return result;
+}
+#endif /* def BUP_MINCORE_BUF_TYPE */
+
+
static PyMethodDef helper_methods[] = {
+ { "write_sparsely", bup_write_sparsely, METH_VARARGS,
+ "Write buf excepting zeros at the end. Return trailing zero count." },
{ "selftest", selftest, METH_VARARGS,
"Check that the rolling checksum rolls correctly (for unit tests)." },
{ "blobbits", blobbits, METH_VARARGS,
"open() the given filename for read with O_NOATIME if possible" },
{ "fadvise_done", fadvise_done, METH_VARARGS,
"Inform the kernel that we're finished with earlier parts of a file" },
-#if defined(linux) && defined(FS_IOC_GETFLAGS)
+#ifdef BUP_HAVE_FILE_ATTRS
{ "get_linux_file_attr", bup_get_linux_file_attr, METH_VARARGS,
"Return the Linux attributes for the given file." },
+#endif
+#ifdef BUP_HAVE_FILE_ATTRS
{ "set_linux_file_attr", bup_set_linux_file_attr, METH_VARARGS,
"Set the Linux attributes for the given file." },
#endif
-#ifdef HAVE_BUP_UTIMENSAT
- { "utimensat", bup_utimensat, METH_VARARGS,
- "Change file timestamps with nanosecond precision." },
+#ifdef HAVE_UTIMENSAT
+ { "bup_utimensat", bup_utimensat, METH_VARARGS,
+ "Change path timestamps with nanosecond precision (POSIX)." },
+#endif
+#ifdef HAVE_UTIMES
+ { "bup_utimes", bup_utimes, METH_VARARGS,
+ "Change path timestamps with microsecond precision." },
+#endif
+#ifdef HAVE_LUTIMES
+ { "bup_lutimes", bup_lutimes, METH_VARARGS,
+ "Change path timestamps with microsecond precision;"
+ " don't follow symlinks." },
#endif
{ "stat", bup_stat, METH_VARARGS,
"Extended version of stat." },
"Extended version of lstat." },
{ "fstat", bup_fstat, METH_VARARGS,
"Extended version of fstat." },
+#ifdef HAVE_TM_TM_GMTOFF
+ { "localtime", bup_localtime, METH_VARARGS,
+ "Return struct_time elements plus the timezone offset and name." },
+#endif
+ { "bytescmp", bup_bytescmp, METH_VARARGS,
+ "Return a negative value if x < y, zero if equal, positive otherwise."},
+#ifdef BUP_MINCORE_BUF_TYPE
+ { "mincore", bup_mincore, METH_VARARGS,
+ "For mincore(src, src_n, src_off, dest, dest_off)"
+ " call the system mincore(src + src_off, src_n, &dest[dest_off])." },
+#endif
{ NULL, NULL, 0, NULL }, // sentinel
};
+static void test_integral_assignment_fits(void)
+{
+ assert(sizeof(signed short) == sizeof(unsigned short));
+ assert(sizeof(signed short) < sizeof(signed long long));
+ assert(sizeof(signed short) < sizeof(unsigned long long));
+ assert(sizeof(unsigned short) < sizeof(signed long long));
+ assert(sizeof(unsigned short) < sizeof(unsigned long long));
+ assert(sizeof(Py_ssize_t) <= sizeof(size_t));
+ {
+ signed short ss, ssmin = SHRT_MIN, ssmax = SHRT_MAX;
+ unsigned short us, usmax = USHRT_MAX;
+ signed long long sllmin = LLONG_MIN, sllmax = LLONG_MAX;
+ unsigned long long ullmax = ULLONG_MAX;
+
+ assert(INTEGRAL_ASSIGNMENT_FITS(&ss, ssmax));
+ assert(INTEGRAL_ASSIGNMENT_FITS(&ss, ssmin));
+ assert(!INTEGRAL_ASSIGNMENT_FITS(&ss, usmax));
+ assert(!INTEGRAL_ASSIGNMENT_FITS(&ss, sllmin));
+ assert(!INTEGRAL_ASSIGNMENT_FITS(&ss, sllmax));
+ assert(!INTEGRAL_ASSIGNMENT_FITS(&ss, ullmax));
+
+ assert(INTEGRAL_ASSIGNMENT_FITS(&us, usmax));
+ assert(!INTEGRAL_ASSIGNMENT_FITS(&us, ssmin));
+ assert(!INTEGRAL_ASSIGNMENT_FITS(&us, sllmin));
+ assert(!INTEGRAL_ASSIGNMENT_FITS(&us, sllmax));
+ assert(!INTEGRAL_ASSIGNMENT_FITS(&us, ullmax));
+ }
+}
-PyMODINIT_FUNC init_helpers(void)
+static int setup_module(PyObject *m)
{
+ // FIXME: migrate these tests to configure, or at least don't
+ // possibly crash the whole application. Check against the type
+ // we're going to use when passing to python. Other stat types
+ // are tested at runtime.
+ assert(sizeof(ino_t) <= sizeof(unsigned PY_LONG_LONG));
+ assert(sizeof(off_t) <= sizeof(PY_LONG_LONG));
+ assert(sizeof(blksize_t) <= sizeof(PY_LONG_LONG));
+ assert(sizeof(blkcnt_t) <= sizeof(PY_LONG_LONG));
+ // Just be sure (relevant when passing timestamps back to Python above).
+ assert(sizeof(PY_LONG_LONG) <= sizeof(long long));
+ assert(sizeof(unsigned PY_LONG_LONG) <= sizeof(unsigned long long));
+
+ test_integral_assignment_fits();
+
+ // Originally required by append_sparse_region()
+ {
+ off_t probe;
+ if (!INTEGRAL_ASSIGNMENT_FITS(&probe, INT_MAX))
+ {
+ fprintf(stderr, "off_t can't hold INT_MAX; please report.\n");
+ exit(1);
+ }
+ }
+
char *e;
- PyObject *m = Py_InitModule("_helpers", helper_methods);
- if (m == NULL)
- return;
-#ifdef HAVE_BUP_UTIMENSAT
- PyModule_AddObject(m, "AT_FDCWD", Py_BuildValue("i", AT_FDCWD));
- PyModule_AddObject(m, "AT_SYMLINK_NOFOLLOW",
- Py_BuildValue("i", AT_SYMLINK_NOFOLLOW));
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wtautological-compare" // For INTEGER_TO_PY().
+ {
+ PyObject *value;
+ value = INTEGER_TO_PY(INT_MAX);
+ PyObject_SetAttrString(m, "INT_MAX", value);
+ Py_DECREF(value);
+ value = INTEGER_TO_PY(UINT_MAX);
+ PyObject_SetAttrString(m, "UINT_MAX", value);
+ Py_DECREF(value);
+ }
+#ifdef HAVE_UTIMENSAT
+ {
+ PyObject *value;
+ value = INTEGER_TO_PY(AT_FDCWD);
+ PyObject_SetAttrString(m, "AT_FDCWD", value);
+ Py_DECREF(value);
+ value = INTEGER_TO_PY(AT_SYMLINK_NOFOLLOW);
+ PyObject_SetAttrString(m, "AT_SYMLINK_NOFOLLOW", value);
+ Py_DECREF(value);
+ value = INTEGER_TO_PY(UTIME_NOW);
+ PyObject_SetAttrString(m, "UTIME_NOW", value);
+ Py_DECREF(value);
+ }
+#endif
+#ifdef BUP_HAVE_MINCORE_INCORE
+ {
+ PyObject *value;
+ value = INTEGER_TO_PY(MINCORE_INCORE);
+ PyObject_SetAttrString(m, "MINCORE_INCORE", value);
+ Py_DECREF(value);
+ }
#endif
+#pragma clang diagnostic pop // ignored "-Wtautological-compare"
+
e = getenv("BUP_FORCE_TTY");
- istty2 = isatty(2) || (atoi(e ? e : "0") & 2);
+ get_state(m)->istty2 = isatty(2) || (atoi(e ? e : "0") & 2);
unpythonize_argv();
+ return 1;
+}
+
+
+#if PY_MAJOR_VERSION < 3
+
+PyMODINIT_FUNC init_helpers(void)
+{
+ PyObject *m = Py_InitModule("_helpers", helper_methods);
+ if (m == NULL)
+ return;
+
+ if (!setup_module(m))
+ {
+ Py_DECREF(m);
+ return;
+ }
+}
+
+# else // PY_MAJOR_VERSION >= 3
+
+static struct PyModuleDef helpers_def = {
+ PyModuleDef_HEAD_INIT,
+ "_helpers",
+ NULL,
+ sizeof(state_t),
+ helper_methods,
+ NULL,
+ NULL, // helpers_traverse,
+ NULL, // helpers_clear,
+ NULL
+};
+
+PyMODINIT_FUNC PyInit__helpers(void)
+{
+ PyObject *module = PyModule_Create(&helpers_def);
+ if (module == NULL)
+ return NULL;
+ if (!setup_module(module))
+ {
+ Py_DECREF(module);
+ return NULL;
+ }
+ return module;
}
+
+#endif // PY_MAJOR_VERSION >= 3
projects / bup.git / blobdiff