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instance method
IO#pathconf
pathconf(p1)
ext/etc/etc.c
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static VALUE
io_pathconf(VALUE io, VALUE arg)
{
int name;
long ret;
name = NUM2INT(arg);
errno = 0;
ret = fpathconf(rb_io_descriptor(io), name);
if (ret == -1) {
if (errno == 0) /* no limit */
return Qnil;
rb_sys_fail("fpathconf");
}
return LONG2NUM(ret);
}
Returns pathname configuration variable using fpathconf().
name should be a constant under Etc which begins with PC_.
The return value is an integer or nil. nil means indefinite limit. (fpathconf() returns -1 but errno is not set.)
Example
require 'etc' IO.pipe {|r, w| p w.pathconf(Etc::PC_PIPE_BUF) #=> 4096 }