1*f65a228fSRobert Mustacchi /*
2*f65a228fSRobert Mustacchi * This file and its contents are supplied under the terms of the
3*f65a228fSRobert Mustacchi * Common Development and Distribution License ("CDDL"), version 1.0.
4*f65a228fSRobert Mustacchi * You may only use this file in accordance with the terms of version
5*f65a228fSRobert Mustacchi * 1.0 of the CDDL.
6*f65a228fSRobert Mustacchi *
7*f65a228fSRobert Mustacchi * A full copy of the text of the CDDL should have accompanied this
8*f65a228fSRobert Mustacchi * source. A copy of the CDDL is also available via the Internet at
9*f65a228fSRobert Mustacchi * http://www.illumos.org/license/CDDL.
10*f65a228fSRobert Mustacchi */
11*f65a228fSRobert Mustacchi
12*f65a228fSRobert Mustacchi /*
13*f65a228fSRobert Mustacchi * Copyright 2020 Robert Mustacchi
14*f65a228fSRobert Mustacchi */
15*f65a228fSRobert Mustacchi
16*f65a228fSRobert Mustacchi /*
17*f65a228fSRobert Mustacchi * Regression test for illumos#12392. Here, ftello64 didn't correctly handle an
18*f65a228fSRobert Mustacchi * ungetc() in the write path when it was unbuffered.
19*f65a228fSRobert Mustacchi */
20*f65a228fSRobert Mustacchi
21*f65a228fSRobert Mustacchi #include <stdio.h>
22*f65a228fSRobert Mustacchi #include <err.h>
23*f65a228fSRobert Mustacchi #include <stdlib.h>
24*f65a228fSRobert Mustacchi
25*f65a228fSRobert Mustacchi static void
check_pos(FILE * f,long pos)26*f65a228fSRobert Mustacchi check_pos(FILE *f, long pos)
27*f65a228fSRobert Mustacchi {
28*f65a228fSRobert Mustacchi long l;
29*f65a228fSRobert Mustacchi off_t off;
30*f65a228fSRobert Mustacchi off64_t off64;
31*f65a228fSRobert Mustacchi
32*f65a228fSRobert Mustacchi l = ftell(f);
33*f65a228fSRobert Mustacchi off = ftello(f);
34*f65a228fSRobert Mustacchi off64 = ftello64(f);
35*f65a228fSRobert Mustacchi
36*f65a228fSRobert Mustacchi if (l != pos) {
37*f65a228fSRobert Mustacchi errx(EXIT_FAILURE, "ftell position mismatched: found %ld, "
38*f65a228fSRobert Mustacchi "expected %ld", l, pos);
39*f65a228fSRobert Mustacchi }
40*f65a228fSRobert Mustacchi
41*f65a228fSRobert Mustacchi if (off != pos) {
42*f65a228fSRobert Mustacchi errx(EXIT_FAILURE, "ftello position mismatched: found %ld, "
43*f65a228fSRobert Mustacchi "expected %ld", off, pos);
44*f65a228fSRobert Mustacchi }
45*f65a228fSRobert Mustacchi
46*f65a228fSRobert Mustacchi if (off64 != pos) {
47*f65a228fSRobert Mustacchi errx(EXIT_FAILURE, "ftello64 position mismatched: found %ld, "
48*f65a228fSRobert Mustacchi "expected %ld", off64, pos);
49*f65a228fSRobert Mustacchi }
50*f65a228fSRobert Mustacchi }
51*f65a228fSRobert Mustacchi
52*f65a228fSRobert Mustacchi static void
check_one(FILE * f)53*f65a228fSRobert Mustacchi check_one(FILE *f)
54*f65a228fSRobert Mustacchi {
55*f65a228fSRobert Mustacchi if (fputc('a', f) != 'a') {
56*f65a228fSRobert Mustacchi err(EXIT_FAILURE, "failed to write character");
57*f65a228fSRobert Mustacchi }
58*f65a228fSRobert Mustacchi check_pos(f, 1);
59*f65a228fSRobert Mustacchi
60*f65a228fSRobert Mustacchi if (ungetc('b', f) != 'b') {
61*f65a228fSRobert Mustacchi err(EXIT_FAILURE, "failed to unget character");
62*f65a228fSRobert Mustacchi }
63*f65a228fSRobert Mustacchi check_pos(f, 0);
64*f65a228fSRobert Mustacchi }
65*f65a228fSRobert Mustacchi
66*f65a228fSRobert Mustacchi int
main(void)67*f65a228fSRobert Mustacchi main(void)
68*f65a228fSRobert Mustacchi {
69*f65a228fSRobert Mustacchi FILE *f;
70*f65a228fSRobert Mustacchi
71*f65a228fSRobert Mustacchi f = tmpfile();
72*f65a228fSRobert Mustacchi if (f == NULL) {
73*f65a228fSRobert Mustacchi err(EXIT_FAILURE, "failed to create temproary "
74*f65a228fSRobert Mustacchi "file");
75*f65a228fSRobert Mustacchi }
76*f65a228fSRobert Mustacchi
77*f65a228fSRobert Mustacchi if (setvbuf(f, NULL, _IONBF, 0) != 0) {
78*f65a228fSRobert Mustacchi err(EXIT_FAILURE, "failed to set non-buffering mode");
79*f65a228fSRobert Mustacchi }
80*f65a228fSRobert Mustacchi check_one(f);
81*f65a228fSRobert Mustacchi if (fclose(f) != 0) {
82*f65a228fSRobert Mustacchi err(EXIT_FAILURE, "failed to close temporary file");
83*f65a228fSRobert Mustacchi }
84*f65a228fSRobert Mustacchi
85*f65a228fSRobert Mustacchi return (0);
86*f65a228fSRobert Mustacchi }
87