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/* Copyright (C) 2017-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* fprintf is a cancellation point, but getopt is not supposed to be a
cancellation point, even when it prints error messages. */
/* Note: getopt.h must be included first in this file, so we get the
GNU getopt rather than the POSIX one. */
#include <getopt.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <pthread.h>
#include <unistd.h>
#include <support/support.h>
#include <support/temp_file.h>
#include <support/xthread.h>
#include <support/xunistd.h>
static bool
check_stderr (bool expect_errmsg, FILE *stderr_trapped)
{
static char *lineptr = 0;
static size_t linesz = 0;
bool got_errmsg = false;
rewind (stderr_trapped);
while (getline (&lineptr, &linesz, stderr_trapped) > 0)
{
got_errmsg = true;
fputs (lineptr, stdout);
}
rewind (stderr_trapped);
xftruncate (fileno (stderr_trapped), 0);
return got_errmsg == expect_errmsg;
}
struct test_short
{
const char *label;
const char *opts;
const char *const argv[8];
int argc;
bool expect_errmsg;
};
struct test_long
{
const char *label;
const char *opts;
const struct option longopts[4];
const char *const argv[8];
int argc;
bool expect_errmsg;
};
#define DEFINE_TEST_DRIVER(test_type, getopt_call) \
struct test_type##_tdata \
{ \
pthread_mutex_t *sync; \
const struct test_type *tcase; \
bool ok; \
}; \
\
static void * \
test_type##_threadproc (void *data) \
{ \
struct test_type##_tdata *tdata = data; \
const struct test_type *tc = tdata->tcase; \
\
xpthread_mutex_lock (tdata->sync); \
xpthread_mutex_unlock (tdata->sync); \
\
/* At this point, this thread has a cancellation pending. \
We should still be able to get all the way through a getopt \
loop without being cancelled. \
Setting optind to 0 forces getopt to reinitialize itself. */ \
optind = 0; \
opterr = 1; \
optopt = 0; \
while (getopt_call != -1) \
; \
tdata->ok = true; \
\
pthread_testcancel(); \
return 0; \
} \
\
static bool \
do_##test_type (const struct test_type *tcase, FILE *stderr_trapped) \
{ \
pthread_mutex_t sync; \
struct test_type##_tdata tdata; \
\
printf("begin: %s\n", tcase->label); \
\
xpthread_mutex_init (&sync, 0); \
xpthread_mutex_lock (&sync); \
\
tdata.sync = &sync; \
tdata.tcase = tcase; \
tdata.ok = false; \
\
pthread_t thr = xpthread_create (0, test_type##_threadproc, \
(void *)&tdata); \
xpthread_cancel (thr); \
xpthread_mutex_unlock (&sync); \
void *rv = xpthread_join (thr); \
\
xpthread_mutex_destroy (&sync); \
\
bool ok = true; \
if (!check_stderr (tcase->expect_errmsg, stderr_trapped)) \
{ \
ok = false; \
printf("FAIL: %s: stderr not as expected\n", tcase->label); \
} \
if (!tdata.ok) \
{ \
ok = false; \
printf("FAIL: %s: did not complete loop\n", tcase->label); \
} \
if (rv != PTHREAD_CANCELED) \
{ \
ok = false; \
printf("FAIL: %s: thread was not cancelled\n", tcase->label); \
} \
if (ok) \
printf ("pass: %s\n", tcase->label); \
return ok; \
}
DEFINE_TEST_DRIVER (test_short,
getopt (tc->argc, (char *const *)tc->argv, tc->opts))
DEFINE_TEST_DRIVER (test_long,
getopt_long (tc->argc, (char *const *)tc->argv,
tc->opts, tc->longopts, 0))
/* Caution: all option strings must begin with a '+' or '-' so that
getopt does not attempt to permute the argument vector (which is in
read-only memory). */
const struct test_short tests_short[] = {
{ "no errors",
"+ab:c", { "program", "-ac", "-b", "x", 0 }, 4, false },
{ "invalid option",
"+ab:c", { "program", "-d", 0 }, 2, true },
{ "missing argument",
"+ab:c", { "program", "-b", 0 }, 2, true },
{ 0 }
};
const struct test_long tests_long[] = {
{ "no errors (long)",
"+ab:c", { { "alpha", no_argument, 0, 'a' },
{ "bravo", required_argument, 0, 'b' },
{ "charlie", no_argument, 0, 'c' },
{ 0 } },
{ "program", "-a", "--charlie", "--bravo=x", 0 }, 4, false },
{ "invalid option (long)",
"+ab:c", { { "alpha", no_argument, 0, 'a' },
{ "bravo", required_argument, 0, 'b' },
{ "charlie", no_argument, 0, 'c' },
{ 0 } },
{ "program", "-a", "--charlie", "--dingo", 0 }, 4, true },
{ "unwanted argument",
"+ab:c", { { "alpha", no_argument, 0, 'a' },
{ "bravo", required_argument, 0, 'b' },
{ "charlie", no_argument, 0, 'c' },
{ 0 } },
{ "program", "-a", "--charlie=dingo", "--bravo=x", 0 }, 4, true },
{ "missing argument",
"+ab:c", { { "alpha", no_argument, 0, 'a' },
{ "bravo", required_argument, 0, 'b' },
{ "charlie", no_argument, 0, 'c' },
{ 0 } },
{ "program", "-a", "--charlie", "--bravo", 0 }, 4, true },
{ "ambiguous options",
"+uvw", { { "veni", no_argument, 0, 'u' },
{ "vedi", no_argument, 0, 'v' },
{ "veci", no_argument, 0, 'w' } },
{ "program", "--ve", 0 }, 2, true },
{ "no errors (long W)",
"+ab:cW;", { { "alpha", no_argument, 0, 'a' },
{ "bravo", required_argument, 0, 'b' },
{ "charlie", no_argument, 0, 'c' },
{ 0 } },
{ "program", "-a", "-W", "charlie", "-W", "bravo=x", 0 }, 6, false },
{ "missing argument (W itself)",
"+ab:cW;", { { "alpha", no_argument, 0, 'a' },
{ "bravo", required_argument, 0, 'b' },
{ "charlie", no_argument, 0, 'c' },
{ 0 } },
{ "program", "-a", "-W", "charlie", "-W", 0 }, 5, true },
{ "missing argument (W longopt)",
"+ab:cW;", { { "alpha", no_argument, 0, 'a' },
{ "bravo", required_argument, 0, 'b' },
{ "charlie", no_argument, 0, 'c' },
{ 0 } },
{ "program", "-a", "-W", "charlie", "-W", "bravo", 0 }, 6, true },
{ "unwanted argument (W longopt)",
"+ab:cW;", { { "alpha", no_argument, 0, 'a' },
{ "bravo", required_argument, 0, 'b' },
{ "charlie", no_argument, 0, 'c' },
{ 0 } },
{ "program", "-a", "-W", "charlie=dingo", "-W", "bravo=x", 0 }, 6, true },
{ "ambiguous options (W)",
"+uvwW;", { { "veni", no_argument, 0, 'u' },
{ "vedi", no_argument, 0, 'v' },
{ "veci", no_argument, 0, 'w' } },
{ "program", "-W", "ve", 0 }, 3, true },
{ 0 }
};
static int
do_test (void)
{
int stderr_trap = create_temp_file ("stderr", 0);
if (stderr_trap < 0)
{
perror ("create_temp_file");
return 1;
}
FILE *stderr_trapped = fdopen(stderr_trap, "r+");
if (!stderr_trapped)
{
perror ("fdopen");
return 1;
}
int old_stderr = dup (fileno (stderr));
if (old_stderr < 0)
{
perror ("dup");
return 1;
}
if (dup2 (stderr_trap, 2) < 0)
{
perror ("dup2");
return 1;
}
rewind (stderr);
bool success = true;
for (const struct test_short *tcase = tests_short; tcase->label; tcase++)
success = do_test_short (tcase, stderr_trapped) && success;
for (const struct test_long *tcase = tests_long; tcase->label; tcase++)
success = do_test_long (tcase, stderr_trapped) && success;
dup2 (old_stderr, 2);
close (old_stderr);
fclose (stderr_trapped);
return success ? 0 : 1;
}
#include <support/test-driver.c>
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