1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/**
* Copyright (c) 2020, Timothy Stack
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Timothy Stack nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @file file_format.hh
*/
#include "file_format.hh"
#include "archive_manager.hh"
#include "base/auto_fd.hh"
#include "base/fs_util.hh"
#include "base/intern_string.hh"
#include "base/lnav_log.hh"
#include "config.h"
file_format_t
detect_file_format(const ghc::filesystem::path& filename)
{
auto describe_res = archive_manager::describe(filename);
if (describe_res.isOk()
&& describe_res.unwrap().is<archive_manager::archive_info>())
{
return file_format_t::ARCHIVE;
}
file_format_t retval = file_format_t::UNKNOWN;
auto open_res = lnav::filesystem::open_file(filename, O_RDONLY);
if (open_res.isErr()) {
log_error("unable to open file for format detection: %s -- %s",
filename.c_str(),
open_res.unwrapErr().c_str());
} else {
auto fd = open_res.unwrap();
uint8_t buffer[32];
auto rc = read(fd, buffer, sizeof(buffer));
if (rc < 0) {
log_error("unable to read file for format detection: %s -- %s",
filename.c_str(),
strerror(errno));
} else {
static auto SQLITE3_HEADER = "SQLite format 3";
auto header_frag = string_fragment::from_bytes(buffer, rc);
if (header_frag.startswith(SQLITE3_HEADER)) {
retval = file_format_t::SQLITE_DB;
}
}
}
return retval;
}
|
