+static VALUE ruby_guestfs_head (VALUE gv, VALUE pathv)
+{
+ guestfs_h *g;
+ Data_Get_Struct (gv, guestfs_h, g);
+ if (!g)
+ rb_raise (rb_eArgError, "%s: used handle after closing it", "head");
+
+ Check_Type (pathv, T_STRING);
+ const char *path = StringValueCStr (pathv);
+ if (!path)
+ rb_raise (rb_eTypeError, "expected string for parameter %s of %s",
+ "path", "head");
+
+ char **r;
+
+ r = guestfs_head (g, path);
+ if (r == NULL)
+ rb_raise (e_Error, "%s", guestfs_last_error (g));
+
+ int i, len = 0;
+ for (i = 0; r[i] != NULL; ++i) len++;
+ VALUE rv = rb_ary_new2 (len);
+ for (i = 0; r[i] != NULL; ++i) {
+ rb_ary_push (rv, rb_str_new2 (r[i]));
+ free (r[i]);
+ }
+ free (r);
+ return rv;
+}
+
+static VALUE ruby_guestfs_head_n (VALUE gv, VALUE nrlinesv, VALUE pathv)
+{
+ guestfs_h *g;
+ Data_Get_Struct (gv, guestfs_h, g);
+ if (!g)
+ rb_raise (rb_eArgError, "%s: used handle after closing it", "head_n");
+
+ int nrlines = NUM2INT (nrlinesv);
+ Check_Type (pathv, T_STRING);
+ const char *path = StringValueCStr (pathv);
+ if (!path)
+ rb_raise (rb_eTypeError, "expected string for parameter %s of %s",
+ "path", "head_n");
+
+ char **r;
+
+ r = guestfs_head_n (g, nrlines, path);
+ if (r == NULL)
+ rb_raise (e_Error, "%s", guestfs_last_error (g));
+
+ int i, len = 0;
+ for (i = 0; r[i] != NULL; ++i) len++;
+ VALUE rv = rb_ary_new2 (len);
+ for (i = 0; r[i] != NULL; ++i) {
+ rb_ary_push (rv, rb_str_new2 (r[i]));
+ free (r[i]);
+ }
+ free (r);
+ return rv;
+}
+
+static VALUE ruby_guestfs_tail (VALUE gv, VALUE pathv)
+{
+ guestfs_h *g;
+ Data_Get_Struct (gv, guestfs_h, g);
+ if (!g)
+ rb_raise (rb_eArgError, "%s: used handle after closing it", "tail");
+
+ Check_Type (pathv, T_STRING);
+ const char *path = StringValueCStr (pathv);
+ if (!path)
+ rb_raise (rb_eTypeError, "expected string for parameter %s of %s",
+ "path", "tail");
+
+ char **r;
+
+ r = guestfs_tail (g, path);
+ if (r == NULL)
+ rb_raise (e_Error, "%s", guestfs_last_error (g));
+
+ int i, len = 0;
+ for (i = 0; r[i] != NULL; ++i) len++;
+ VALUE rv = rb_ary_new2 (len);
+ for (i = 0; r[i] != NULL; ++i) {
+ rb_ary_push (rv, rb_str_new2 (r[i]));
+ free (r[i]);
+ }
+ free (r);
+ return rv;
+}
+
+static VALUE ruby_guestfs_tail_n (VALUE gv, VALUE nrlinesv, VALUE pathv)
+{
+ guestfs_h *g;
+ Data_Get_Struct (gv, guestfs_h, g);
+ if (!g)
+ rb_raise (rb_eArgError, "%s: used handle after closing it", "tail_n");
+
+ int nrlines = NUM2INT (nrlinesv);
+ Check_Type (pathv, T_STRING);
+ const char *path = StringValueCStr (pathv);
+ if (!path)
+ rb_raise (rb_eTypeError, "expected string for parameter %s of %s",
+ "path", "tail_n");
+
+ char **r;
+
+ r = guestfs_tail_n (g, nrlines, path);
+ if (r == NULL)
+ rb_raise (e_Error, "%s", guestfs_last_error (g));
+
+ int i, len = 0;
+ for (i = 0; r[i] != NULL; ++i) len++;
+ VALUE rv = rb_ary_new2 (len);
+ for (i = 0; r[i] != NULL; ++i) {
+ rb_ary_push (rv, rb_str_new2 (r[i]));
+ free (r[i]);
+ }
+ free (r);
+ return rv;
+}
+