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t-exectool.c
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/* t-exectool.c - Module test for exectool.c
* Copyright (C) 2016 g10 Code GmbH
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <assert.h>
#include <unistd.h>
#include "util.h"
#include "exectool.h"
static int verbose;
#define fail(msg, err) \
do { fprintf (stderr, "%s:%d: %s failed: %s\n", \
__FILE__,__LINE__, (msg), gpg_strerror (err)); \
exit (1); \
} while(0)
static void
test_executing_true (void)
{
gpg_error_t err;
const char *argv[] = { "/bin/true", NULL };
char *result;
size_t len;
if (access (argv[0], X_OK))
{
fprintf (stderr, "skipping test: %s not executable: %s",
argv[0], strerror (errno));
return;
}
if (verbose)
fprintf (stderr, "Executing %s...\n", argv[0]);
err = gnupg_exec_tool (argv[0], &argv[1], "", &result, &len);
if (err)
fail ("gnupg_exec_tool", err);
assert (result);
assert (len == 0);
free (result);
}
static void
test_executing_false (void)
{
gpg_error_t err;
const char *argv[] = { "/bin/false", NULL };
char *result;
size_t len;
if (access (argv[0], X_OK))
{
fprintf (stderr, "skipping test: %s not executable: %s",
argv[0], strerror (errno));
return;
}
if (verbose)
fprintf (stderr, "Executing %s...\n", argv[0]);
err = gnupg_exec_tool (argv[0], &argv[1], "", &result, &len);
assert (err == GPG_ERR_GENERAL);
}
static void
test_executing_cat (const char *vector)
{
gpg_error_t err;
const char *argv[] = { "/bin/cat", NULL };
char *result;
size_t len;
if (access (argv[0], X_OK))
{
fprintf (stderr, "skipping test: %s not executable: %s",
argv[0], strerror (errno));
return;
}
if (verbose)
fprintf (stderr, "Executing %s...\n", argv[0]);
err = gnupg_exec_tool (argv[0], &argv[1], vector, &result, &len);
if (err)
fail ("gnupg_exec_tool", err);
assert (result);
/* gnupg_exec_tool returns the correct length... */
assert (len == strlen (vector));
/* ... but 0-terminates data for ease of use. */
assert (result[len] == 0);
assert (strcmp (result, vector) == 0);
free (result);
}
static void
test_catting_cat (void)
{
gpg_error_t err;
const char *argv[] = { "/bin/cat", "/bin/cat", NULL };
char *result;
size_t len;
estream_t in;
char *reference, *p;
size_t reference_len;
if (access (argv[0], X_OK))
{
fprintf (stderr, "skipping test: %s not executable: %s",
argv[0], strerror (errno));
return;
}
in = es_fopen (argv[1], "r");
if (in == NULL)
{
fprintf (stderr, "skipping test: could not open %s: %s",
argv[1], strerror (errno));
return;
}
err = es_fseek (in, 0L, SEEK_END);
if (err)
{
fprintf (stderr, "skipping test: could not seek in %s: %s",
argv[1], gpg_strerror (err));
return;
}
reference_len = es_ftell (in);
err = es_fseek (in, 0L, SEEK_SET);
assert (!err || !"rewinding failed");
reference = malloc (reference_len);
assert (reference || !"allocating reference buffer failed");
for (p = reference; p - reference < reference_len; )
{
size_t bytes_read, left;
left = reference_len - (p - reference);
if (left > 4096)
left = 4096;
err = es_read (in, p, left, &bytes_read);
if (err)
{
fprintf (stderr, "error reading %s: %s",
argv[1], gpg_strerror (err));
exit (1);
}
p += bytes_read;
}
es_fclose (in);
if (verbose)
fprintf (stderr, "Executing %s %s...\n", argv[0], argv[1]);
err = gnupg_exec_tool (argv[0], &argv[1], "", &result, &len);
if (err)
fail ("gnupg_exec_tool", err);
assert (result);
/* gnupg_exec_tool returns the correct length... */
assert (len == reference_len);
assert (memcmp (result, reference, reference_len) == 0);
free (reference);
free (result);
}
int
main (int argc, char **argv)
{
int i;
char binjunk[256];
if (argc)
{ argc--; argv++; }
if (argc && !strcmp (argv[0], "--verbose"))
{
verbose = 1;
argc--; argv++;
}
test_executing_true ();
test_executing_false ();
test_executing_cat ("Talking to myself here...");
for (i = 0; i < 255 /* one less */; i++)
binjunk[i] = i + 1; /* avoid 0 */
binjunk[255] = 0;
test_executing_cat (binjunk);
test_catting_cat ();
return 0;
}

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