static void
test_checksum(const char *filename, lr_ChecksumType ch_type, char *expected)
{
int fd;
char *checksum;
fail_if((fd = open(filename, O_RDONLY)) < 0);
fail_if((checksum = lr_checksum_fd(ch_type, fd)) == NULL);
fail_if(strcmp(checksum, expected),
"Checksum is %s instead of %s", checksum, expected);
lr_free(checksum);
close(fd);
}
gboolean
lr_checksum_fd_compare(LrChecksumType type,
int fd,
const char *expected,
gboolean caching,
gboolean *matches,
gchar **calculated,
GError **err)
{
_cleanup_free_ gchar *checksum = NULL;
assert(fd >= 0);
assert(!err || *err == NULL);
*matches = FALSE;
if (!expected) {
g_set_error(err, LR_CHECKSUM_ERROR, LRE_BADFUNCARG,
"No expected checksum passed");
return FALSE;
}
if (caching) {
// Load cached checksum if enabled and used
struct stat st;
if (fstat(fd, &st) == 0) {
ssize_t attr_ret;
_cleanup_free_ gchar *key = NULL;
char buf[256];
key = g_strdup_printf("user.Zif.MdChecksum[%llu]",
(unsigned long long) st.st_mtime);
#ifdef __APPLE__
attr_ret = fgetxattr(fd, key, &buf, 256, 0, 0);
#else
attr_ret = fgetxattr(fd, key, &buf, 256);
#endif
if (attr_ret != -1) {
// Cached checksum found
g_debug("%s: Using checksum cached in xattr: [%s] %s",
__func__, key, buf);
*matches = strcmp(expected, buf) ? FALSE : TRUE;
return TRUE;
}
}
}
checksum = lr_checksum_fd(type, fd, err);
if (!checksum)
return FALSE;
*matches = (strcmp(expected, checksum)) ? FALSE : TRUE;
if (caching && *matches) {
// Store checksum as extended file attribute if caching is enabled
struct stat st;
if (fstat(fd, &st) == 0) {
_cleanup_free_ gchar *key = NULL;
key = g_strdup_printf("user.Zif.MdChecksum[%llu]",
(unsigned long long) st.st_mtime);
#ifdef __APPLE__
fsetxattr(fd, key, checksum, strlen(checksum)+1, 0, 0);
#else
fsetxattr(fd, key, checksum, strlen(checksum)+1, 0);
#endif
}
}
if (calculated)
*calculated = g_strdup(checksum);
return TRUE;
}
