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instance method
FileTest#blockdev?
(::path | ::io file_name) -> bool
File.blockdev?(object) → true or false
file.c
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static VALUE
rb_file_blockdev_p(VALUE obj, VALUE fname)
{
#ifndef S_ISBLK
# ifdef S_IFBLK
# define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
# else
# define S_ISBLK(m) (0) /* anytime false */
# endif
#endif
#ifdef S_ISBLK
struct stat st;
if (rb_stat(fname, &st) < 0) return Qfalse;
if (S_ISBLK(st.st_mode)) return Qtrue;
#endif
return Qfalse;
}
Returns whether object (a path or IO object) represents a block device (i.e., a direct-access device):
Example
File.blockdev?('/dev/nvme0n1') # => true File.blockdev?('/dev/loop0') # => true File.blockdev?('/dev/tty') # => false File.blockdev?('/dev/null') # => false File.blockdev?('nosuch') # => false File.blockdev?($stdin) # => false
The returned value is filesystem-dependent; returns false on Windows or MacOS.