iostream-rawlog.c revision 4c05697a4f3958c836e23e1eff5b4b7c49ef6617
/* Copyright (c) 2011-2012 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "hostpid.h"
#include "ioloop.h"
#include "buffer.h"
#include "str.h"
#include "write-full.h"
#include "time-util.h"
#include "istream.h"
#include "ostream.h"
#include "iostream-private.h"
#include "iostream-rawlog-private.h"
#include "istream-rawlog.h"
#include "ostream-rawlog.h"
#include "iostream-rawlog.h"
#include <unistd.h>
#include <fcntl.h>
#define RAWLOG_MAX_LINE_LEN 8192
static int
rawlog_write(struct rawlog_iostream *rstream, const void *data, size_t size)
{
if (rstream->rawlog_fd == -1)
return -1;
if (write_full(rstream->rawlog_fd, data, size) < 0) {
i_error("rawlog_istream.write(%s) failed: %m",
rstream->rawlog_path);
iostream_rawlog_close(rstream);
return -1;
}
return 0;
}
static int
rawlog_write_timestamp(struct rawlog_iostream *rstream, bool line_ends)
{
unsigned char data[MAX_INT_STRLEN + 6 + 1 + 3];
buffer_t buf;
buffer_create_from_data(&buf, data, sizeof(data));
str_printfa(&buf, "%lu.%06u ",
(unsigned long)ioloop_timeval.tv_sec,
(unsigned int)ioloop_timeval.tv_usec);
if ((rstream->flags & IOSTREAM_RAWLOG_FLAG_BUFFERED) != 0) {
str_append_c(&buf, rstream->input ? 'I' : 'O');
str_append_c(&buf, line_ends ? ':' : '>');
str_append_c(&buf, ' ');
}
return rawlog_write(rstream, buf.data, buf.used);
}
void iostream_rawlog_init(struct rawlog_iostream *rstream,
enum iostream_rawlog_flags flags, bool input)
{
rstream->flags = flags;
rstream->input = input;
if ((rstream->flags & IOSTREAM_RAWLOG_FLAG_BUFFERED) != 0)
rstream->buffer = buffer_create_dynamic(default_pool, 1024);
}
static void
iostream_rawlog_write_unbuffered(struct rawlog_iostream *rstream,
const unsigned char *data, size_t size)
{
size_t i, start;
if (!rstream->line_continued) {
if (rawlog_write_timestamp(rstream, TRUE) < 0)
return;
}
for (start = 0, i = 1; i < size; i++) {
if (data[i-1] == '\n') {
if (rawlog_write(rstream, data + start, i - start) < 0 ||
rawlog_write_timestamp(rstream, TRUE) < 0)
return;
start = i;
}
}
if (start != size) {
if (rawlog_write(rstream, data + start, size - start) < 0)
return;
}
rstream->line_continued = data[size-1] != '\n';
}
void iostream_rawlog_write(struct rawlog_iostream *rstream,
const unsigned char *data, size_t size)
{
const unsigned char *p;
size_t pos;
bool line_ends;
i_assert(size > 0);
io_loop_time_refresh();
if ((rstream->flags & IOSTREAM_RAWLOG_FLAG_BUFFERED) == 0) {
iostream_rawlog_write_unbuffered(rstream, data, size);
return;
}
while (rstream->rawlog_fd != -1 && size > 0) {
p = memchr(data, '\n', size);
if (p != NULL) {
line_ends = TRUE;
pos = p-data + 1;
} else if (rstream->buffer->used + size < RAWLOG_MAX_LINE_LEN) {
buffer_append(rstream->buffer, data, size);
return;
} else {
line_ends = FALSE;
pos = size;
}
if (rawlog_write_timestamp(rstream, line_ends) < 0)
break;
if (rstream->buffer->used > 0) {
if (rawlog_write(rstream, rstream->buffer->data,
rstream->buffer->used) < 0)
break;
}
if (rawlog_write(rstream, data, pos) < 0)
break;
data += pos;
size -= pos;
}
}
void iostream_rawlog_close(struct rawlog_iostream *rstream)
{
if ((rstream->flags & IOSTREAM_RAWLOG_FLAG_AUTOCLOSE) != 0 &&
rstream->rawlog_fd != -1) {
if (close(rstream->rawlog_fd) < 0) {
i_error("rawlog_istream.close(%s) failed: %m",
rstream->rawlog_path);
}
}
rstream->rawlog_fd = -1;
i_free_and_null(rstream->rawlog_path);
if (rstream->buffer != NULL)
buffer_free(&rstream->buffer);
}
int iostream_rawlog_create(const char *dir, struct istream **input,
struct ostream **output)
{
static unsigned int counter = 0;
const char *timestamp, *prefix;
timestamp = t_strflocaltime("%Y%m%d-%H%M%S", ioloop_time);
counter++;
prefix = t_strdup_printf("%s/%s.%s.%u", dir, timestamp, my_pid, counter);
return iostream_rawlog_create_prefix(prefix, input, output);
}
int iostream_rawlog_create_prefix(const char *prefix, struct istream **input,
struct ostream **output)
{
const char *in_path, *out_path;
struct istream *old_input;
struct ostream *old_output;
int in_fd, out_fd;
in_path = t_strdup_printf("%s.in", prefix);
in_fd = open(in_path, O_CREAT | O_APPEND | O_WRONLY, 0600);
if (in_fd == -1) {
i_error("creat(%s) failed: %m", in_path);
return -1;
}
out_path = t_strdup_printf("%s.out", prefix);
out_fd = open(out_path, O_CREAT | O_APPEND | O_WRONLY, 0600);
if (out_fd == -1) {
i_error("creat(%s) failed: %m", out_path);
i_close_fd(&in_fd);
(void)unlink(in_path);
return -1;
}
old_input = *input;
old_output = *output;
*input = i_stream_create_rawlog(old_input, in_path, in_fd,
IOSTREAM_RAWLOG_FLAG_AUTOCLOSE);
*output = o_stream_create_rawlog(old_output, out_path, out_fd,
IOSTREAM_RAWLOG_FLAG_AUTOCLOSE);
i_stream_unref(&old_input);
o_stream_unref(&old_output);
return 0;
}
int iostream_rawlog_create_path(const char *path, struct istream **input,
struct ostream **output)
{
struct istream *old_input;
struct ostream *old_output;
int fd;
fd = open(path, O_CREAT | O_APPEND | O_WRONLY, 0600);
if (fd == -1) {
i_error("creat(%s) failed: %m", path);
return -1;
}
old_input = *input;
old_output = *output;
*input = i_stream_create_rawlog(old_input, path, fd,
IOSTREAM_RAWLOG_FLAG_BUFFERED);
*output = o_stream_create_rawlog(old_output, path, fd,
IOSTREAM_RAWLOG_FLAG_AUTOCLOSE |
IOSTREAM_RAWLOG_FLAG_BUFFERED);
i_stream_unref(&old_input);
o_stream_unref(&old_output);
return 0;
}