bool TRI_PrintJson (int fd, TRI_json_t const* object) {
TRI_string_buffer_t buffer;
char const* p;
size_t n;
TRI_InitStringBuffer(&buffer, TRI_UNKNOWN_MEM_ZONE);
StringifyJson(buffer._memoryZone, &buffer, object, true);
p = TRI_BeginStringBuffer(&buffer);
n = TRI_LengthStringBuffer(&buffer);
while (0 < n) {
ssize_t m = TRI_WRITE(fd, p, n);
if (m <= 0) {
TRI_AnnihilateStringBuffer(&buffer);
return false;
}
n -= m;
p += m;
}
TRI_AnnihilateStringBuffer(&buffer);
return true;
}
void spit (string const& filename, StringBuffer const& content) {
int fd = TRI_CREATE(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP);
if (fd == -1) {
LOG_TRACE("open failed for '%s' with %s", filename.c_str(), strerror(errno));
THROW_FILE_OPEN_ERROR("open", filename, "O_WRONLY | O_CREAT | O_TRUNC", errno);
}
char const* ptr = content.c_str();
size_t len = content.length();
while (0 < len) {
ssize_t n = TRI_WRITE(fd, ptr, len);
if (n < 1) {
TRI_CLOSE(fd);
LOG_TRACE("write failed for '%s' with %s and result %d on %d",
filename.c_str(),
strerror(errno),
(int) n,
fd);
THROW_FILE_FUNC_ERROR("write", "", errno);
}
ptr += n;
len -= n;
}
TRI_CLOSE(fd);
return;
}
static bool PrintVelocyPack(int fd, VPackSlice const& slice,
bool appendNewline) {
if (slice.isNone()) {
// sanity check
return false;
}
TRI_string_buffer_t buffer;
TRI_InitStringBuffer(&buffer, TRI_UNKNOWN_MEM_ZONE);
arangodb::basics::VPackStringBufferAdapter bufferAdapter(&buffer);
try {
VPackDumper dumper(&bufferAdapter);
dumper.dump(slice);
} catch (...) {
// Writing failed
TRI_AnnihilateStringBuffer(&buffer);
return false;
}
if (TRI_LengthStringBuffer(&buffer) == 0) {
// should not happen
return false;
}
if (appendNewline) {
// add the newline here so we only need one write operation in the ideal
// case
TRI_AppendCharStringBuffer(&buffer, '\n');
}
char const* p = TRI_BeginStringBuffer(&buffer);
size_t n = TRI_LengthStringBuffer(&buffer);
while (0 < n) {
ssize_t m = TRI_WRITE(fd, p, (TRI_write_t)n);
if (m <= 0) {
TRI_AnnihilateStringBuffer(&buffer);
return false;
}
n -= m;
p += m;
}
TRI_AnnihilateStringBuffer(&buffer);
return true;
}
bool TRI_PrintJson (int fd,
TRI_json_t const* object,
bool appendNewline) {
TRI_string_buffer_t buffer;
char const* p;
size_t n;
if (object == NULL) {
// sanity check
return false;
}
TRI_InitStringBuffer(&buffer, TRI_UNKNOWN_MEM_ZONE);
if (StringifyJson(buffer._memoryZone, &buffer, object, true) != TRI_ERROR_NO_ERROR) {
TRI_AnnihilateStringBuffer(&buffer);
return false;
}
if (TRI_LengthStringBuffer(&buffer) == 0) {
// should not happen
return false;
}
if (appendNewline) {
// add the newline here so we only need one write operation in the ideal case
TRI_AppendCharStringBuffer(&buffer, '\n');
}
p = TRI_BeginStringBuffer(&buffer);
n = TRI_LengthStringBuffer(&buffer);
while (0 < n) {
ssize_t m = TRI_WRITE(fd, p, (TRI_write_t) n);
if (m <= 0) {
TRI_AnnihilateStringBuffer(&buffer);
return false;
}
n -= m;
p += m;
}
TRI_AnnihilateStringBuffer(&buffer);
return true;
}
bool TRI_SaveJson (char const* filename, TRI_json_t const* object) {
bool ok;
char* tmp;
int fd;
int res;
ssize_t m;
tmp = TRI_Concatenate2String(filename, ".tmp");
if (tmp == NULL) {
return false;
}
fd = TRI_CREATE(tmp, O_CREAT | O_EXCL | O_RDWR, S_IRUSR | S_IWUSR);
if (fd < 0) {
TRI_set_errno(TRI_ERROR_SYS_ERROR);
LOG_ERROR("cannot create json file '%s': '%s'", tmp, TRI_LAST_ERROR_STR);
TRI_FreeString(TRI_CORE_MEM_ZONE, tmp);
return false;
}
ok = TRI_PrintJson(fd, object);
if (! ok) {
TRI_set_errno(TRI_ERROR_SYS_ERROR);
LOG_ERROR("cannot write to json file '%s': '%s'", tmp, TRI_LAST_ERROR_STR);
TRI_UnlinkFile(tmp);
TRI_FreeString(TRI_CORE_MEM_ZONE, tmp);
return false;
}
m = TRI_WRITE(fd, "\n", 1);
if (m <= 0) {
TRI_set_errno(TRI_ERROR_SYS_ERROR);
LOG_ERROR("cannot write to json file '%s': '%s'", tmp, TRI_LAST_ERROR_STR);
TRI_UnlinkFile(tmp);
TRI_FreeString(TRI_CORE_MEM_ZONE, tmp);
return false;
}
ok = TRI_fsync(fd);
if (! ok) {
TRI_set_errno(TRI_ERROR_SYS_ERROR);
LOG_ERROR("cannot sync saved json '%s': '%s'", tmp, TRI_LAST_ERROR_STR);
TRI_UnlinkFile(tmp);
TRI_FreeString(TRI_CORE_MEM_ZONE, tmp);
return false;
}
res = TRI_CLOSE(fd);
if (res < 0) {
TRI_set_errno(TRI_ERROR_SYS_ERROR);
LOG_ERROR("cannot close saved file '%s': '%s'", tmp, TRI_LAST_ERROR_STR);
TRI_UnlinkFile(tmp);
TRI_FreeString(TRI_CORE_MEM_ZONE, tmp);
return false;
}
res = TRI_RenameFile(tmp, filename);
if (res != TRI_ERROR_NO_ERROR) {
LOG_ERROR("cannot rename saved file '%s' to '%s': '%s'", tmp, filename, TRI_LAST_ERROR_STR);
TRI_UnlinkFile(tmp);
TRI_FreeString(TRI_CORE_MEM_ZONE, tmp);
return res;
}
TRI_FreeString(TRI_CORE_MEM_ZONE, tmp);
return ok;
}