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37 lines
776 B
C++
37 lines
776 B
C++
#include <IO/ReadHelpers.h>
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#include <IO/WriteBufferFromString.h>
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#include <IO/ReadBufferFromFile.h>
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#include <Common/ShellCommand.h>
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#include <Common/getMaxFileDescriptorCount.h>
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#include <filesystem>
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int getMaxFileDescriptorCount()
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{
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namespace fs = std::filesystem;
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int result = -1;
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#if defined(__linux__) || defined(__APPLE__)
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using namespace DB;
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if (fs::exists("/proc/sys/fs/file-max"))
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{
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ReadBufferFromFile reader("/proc/sys/fs/file-max");
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readIntText(result, reader);
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}
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else
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{
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auto command = ShellCommand::execute("ulimit -n");
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try
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{
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readIntText(result, command->out);
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command->wait();
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}
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catch (...)
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{
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}
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}
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#endif
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return result;
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}
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