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[Module CPU] fix crash due to empty frequencies.

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On some systems (eg: ARM) the supported frequencies of the CPU are not
properly reported by /proc/cpuinfo so if that fails try to retrieve them
from /sys/devices/system/cpu/cpufreq/policy[0-9]/cpuinfo_[max|min]_freq.
This commit is contained in:
jgmdev 2021-04-15 14:30:29 -04:00
parent 97e4b53cf3
commit f8f1e791a3
1 changed files with 27 additions and 0 deletions
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27
src/modules/cpu/linux.cpp
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@ -1,3 +1,4 @@
#include <filesystem>
#include "modules/cpu.hpp" #include "modules/cpu.hpp"
std::vector<std::tuple<size_t, size_t>> waybar::modules::Cpu::parseCpuinfo() { std::vector<std::tuple<size_t, size_t>> waybar::modules::Cpu::parseCpuinfo() {
@ -46,5 +47,31 @@ std::vector<float> waybar::modules::Cpu::parseCpuFrequencies() {
frequencies.push_back(frequency); frequencies.push_back(frequency);
} }
info.close(); info.close();
if (frequencies.size() <= 0) {
std::string cpufreq_dir = "/sys/devices/system/cpu/cpufreq";
if (std::filesystem::exists(cpufreq_dir)) {
std::vector<std::string> frequency_files = {
"/cpuinfo_min_freq",
"/cpuinfo_max_freq"
};
for (auto& p: std::filesystem::directory_iterator(cpufreq_dir)) {
for (auto freq_file: frequency_files) {
std::string freq_file_path = p.path().string() + freq_file;
if (std::filesystem::exists(freq_file_path)) {
std::string freq_value;
std::ifstream freq(freq_file_path);
if (freq.is_open()) {
getline(freq, freq_value);
float frequency = std::strtol(freq_value.c_str(), nullptr, 10);
frequencies.push_back(frequency / 1000);
freq.close();
}
}
}
}
}
}
return frequencies; return frequencies;
} }