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LibIPC: Support sending file descriptors :^)
It is now possible to use the special IPC::File type in message arguments. In C++, the type is nothing more than a wrapper over a file descriptor. But when serializing/deserializing IPC::File arguments, LibIPC will use the sendfd/recvfd kernel APIs instead of sending the integer inline. This makes it quite convenient to pass files over IPC, and will allow us to significantly tighten sandboxes in the future :^) Closes https://github.com/SerenityOS/serenity/issues/3643
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9 changed files with 148 additions and 50 deletions
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@ -28,6 +28,9 @@
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#include <AK/URL.h>
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#include <LibIPC/Decoder.h>
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#include <LibIPC/Dictionary.h>
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#include <LibIPC/File.h>
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#include <string.h>
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#include <sys/socket.h>
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namespace IPC {
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@ -163,4 +166,21 @@ bool Decoder::decode(Dictionary& dictionary)
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return true;
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}
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bool Decoder::decode(File& file)
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{
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#ifdef __serenity__
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int fd = recvfd(m_sockfd);
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if (fd < 0) {
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dbgln("recvfd: {}", strerror(errno));
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return false;
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}
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file = File(fd);
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return true;
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#else
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(void)file;
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warnln("fd passing is not supported on this platform, sorry :(");
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return false;
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#endif
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}
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}
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