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#include "ruby/ruby.h"
#include "ruby/io.h"
#ifdef __linux__
# define HAVE_GETMNTENT
#endif
#ifdef HAVE_GETMNTENT
# include <stdio.h>
# include <mntent.h>
#endif
VALUE
get_fsname(VALUE self, VALUE str)
{
#ifdef HAVE_GETMNTENT
const char *path;
struct mntent mntbuf;
static const int buflen = 4096;
char *buf = alloca(buflen);
int len = 0;
FILE *fp;
#define FSNAME_LEN 100
char name[FSNAME_LEN] = "";
FilePathValue(str);
path = RSTRING_PTR(str);
fp = setmntent("/etc/mtab", "r");
if (!fp) rb_sys_fail("setmntent(/etb/mtab)");;
while (getmntent_r(fp, &mntbuf, buf, buflen)) {
int i;
char *mnt_dir = mntbuf.mnt_dir;
for (i=0; mnt_dir[i]; i++) {
if (mnt_dir[i] != path[i]) {
goto next_entry;
}
}
if (i >= len) {
len = i;
strlcpy(name, mntbuf.mnt_type, FSNAME_LEN);
}
next_entry:
;
}
endmntent(fp);
if (!len) rb_sys_fail("no matching entry");;
return rb_str_new_cstr(name);
#else
return Qnil;
#endif
}
void
Init_fs(VALUE module)
{
VALUE fs = rb_define_module_under(module, "Fs");
rb_define_module_function(fs, "fsname", get_fsname, 1);
}
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