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Only use console window size if ioctl(TIOCGWINSZ) succeeded. #418

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Merged
merged 1 commit into from
Nov 28, 2025
Merged

Only use console window size if ioctl(TIOCGWINSZ) succeeded. #418

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6 changes: 3 additions & 3 deletions include/boost/histogram/detail/term_info.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -69,9 +69,9 @@ inline bool utf8() {
inline int width() {
int w = 0;
#if defined TIOCGWINSZ
struct winsize ws;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws);
w = (std::max)(static_cast<int>(ws.ws_col), 0); // not sure if ws_col can be less than 0
struct winsize ws{};
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0)
w = (std::max)(static_cast<int>(ws.ws_col), 0); // not sure if ws_col can be less than 0
#endif
env_t env("COLUMNS");
const int col = (std::max)(static_cast<int>(env), 0);
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