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