Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →
instance method
FileTest#chardev?
File.chardev?(filepath) → true or false
file.c
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static VALUE
rb_file_chardev_p(VALUE obj, VALUE fname)
{
#ifndef S_ISCHR
# define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
#endif
struct stat st;
if (rb_stat(fname, &st) < 0) return Qfalse;
if (S_ISCHR(st.st_mode)) return Qtrue;
return Qfalse;
}
Returns true if filepath points to a character device, false otherwise.
Example
File.chardev?($stdin) # => true File.chardev?('t.txt') # => false