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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-07 04:48:35 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-07 04:48:35 +0000 |
commit | 207df6fc406e81bfeebdff7f404bd242ff3f099f (patch) | |
tree | a1a796b056909dd0a04ffec163db9363a8757808 /src/base/piper.file.cc | |
parent | Releasing progress-linux version 0.11.2-1~progress7.99u1. (diff) | |
download | lnav-207df6fc406e81bfeebdff7f404bd242ff3f099f.tar.xz lnav-207df6fc406e81bfeebdff7f404bd242ff3f099f.zip |
Merging upstream version 0.12.2.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/base/piper.file.cc')
-rw-r--r-- | src/base/piper.file.cc | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/base/piper.file.cc b/src/base/piper.file.cc new file mode 100644 index 0000000..1443604 --- /dev/null +++ b/src/base/piper.file.cc @@ -0,0 +1,81 @@ +/** + * Copyright (c) 2023, 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. + */ + +#include "piper.file.hh" + +#include <arpa/inet.h> +#include <unistd.h> + +#include "base/lnav_log.hh" +#include "base/paths.hh" + +namespace lnav { +namespace piper { + +const char HEADER_MAGIC[4] = {'L', 0, 'N', 1}; + +const ghc::filesystem::path& +storage_path() +{ + static auto INSTANCE = lnav::paths::workdir() / "piper"; + + return INSTANCE; +} + +nonstd::optional<auto_buffer> +read_header(int fd, const char* first8) +{ + if (memcmp(first8, HEADER_MAGIC, sizeof(HEADER_MAGIC)) != 0) { + log_trace("first 4 bytes are not a piper header: %02x%02x%02x%02x", + first8[0], + first8[1], + first8[2], + first8[3]); + return nonstd::nullopt; + } + + uint32_t meta_size = ntohl(*((uint32_t*) &first8[4])); + + auto meta_buf = auto_buffer::alloc(meta_size); + if (meta_buf.in() == nullptr) { + log_error("failed to alloc %d bytes for header", meta_size); + return nonstd::nullopt; + } + auto meta_prc = pread(fd, meta_buf.in(), meta_size, 8); + if (meta_prc != meta_size) { + log_error("failed to read piper header: %s", strerror(errno)); + return nonstd::nullopt; + } + meta_buf.resize(meta_size); + + return meta_buf; +} + +} // namespace piper +} // namespace lnav |