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Add additional checks for non-seekable input #707

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Merged
sfchen merged 1 commit into from
Jul 10, 2026
Merged

Add additional checks for non-seekable input #707

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4 changes: 3 additions & 1 deletion src/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -434,7 +434,9 @@ int main(int argc, char* argv[]){

time_t t1 = time(NULL);

bool supportEvaluation = !opt.inputFromSTDIN && opt.in1!="/dev/stdin";
bool supportEvaluation = !opt.inputFromSTDIN && opt.in1!="/dev/stdin"
&& is_regular_file(opt.in1)
&& (opt.in2.empty() || is_regular_file(opt.in2));

Evaluator eva(&opt);
if(supportEvaluation) {
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9 changes: 9 additions & 0 deletions src/util.h
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Expand Up @@ -182,6 +182,15 @@ inline bool is_directory(const string& path)
return isdir;
}

// check if a path is a regular file (seekable), not a pipe/FIFO/device
inline bool is_regular_file(const string& path)
{
struct stat status;
if( stat( path.c_str(), &status ) != 0 )
return false;
return S_ISREG( status.st_mode );
}

inline void check_file_valid(const string& s) {
if(!file_exists(s)){
cerr << "ERROR: file '" << s << "' doesn't exist, quit now" << endl;
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