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-rw-r--r--lib/util/regress/closefrom/closefrom_test.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/lib/util/regress/closefrom/closefrom_test.c b/lib/util/regress/closefrom/closefrom_test.c
new file mode 100644
index 0000000..375bb51
--- /dev/null
+++ b/lib/util/regress/closefrom/closefrom_test.c
@@ -0,0 +1,121 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2022 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <config.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define SUDO_ERROR_WRAP 0
+
+#include "sudo_compat.h"
+#include "sudo_fatal.h"
+#include "sudo_util.h"
+
+sudo_dso_public int main(int argc, char *argv[]);
+
+/*
+ * Test that sudo_closefrom() works as expected.
+ */
+
+int
+main(int argc, char *argv[])
+{
+ int ch, fds[2], flag, maxfd, minfd, errors = 0, ntests = 0;
+ initprogname(argc > 0 ? argv[0] : "closefrom_test");
+
+ while ((ch = getopt(argc, argv, "v")) != -1) {
+ switch (ch) {
+ case 'v':
+ /* ignore */
+ break;
+ default:
+ fprintf(stderr, "usage: %s [-v]\n", getprogname());
+ return EXIT_FAILURE;
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ /* We use pipe() because it doesn't rely on the filesystem. */
+ ntests++;
+ if (pipe(fds) == -1) {
+ sudo_warn("%s", "pipe");
+ errors++;
+ goto done;
+ }
+ maxfd = MAX(fds[0], fds[1]);
+ minfd = MIN(fds[0], fds[1]);
+
+ /* Close any fds greater than fds[0] and fds[1]. */
+ sudo_closefrom(maxfd + 1);
+
+ /* Verify that sudo_closefrom() didn't close fds[0] or fds[1]. */
+ ntests++;
+ if (fcntl(fds[0], F_GETFL, 0) == -1) {
+ sudo_warnx("fd %d closed prematurely", fds[0]);
+ errors++;
+ goto done;
+ }
+ ntests++;
+ if (fcntl(fds[1], F_GETFL, 0) == -1) {
+ sudo_warnx("fd %d closed prematurely", fds[1]);
+ errors++;
+ goto done;
+ }
+
+ /* Close fds[0], fds[1] and above. */
+ sudo_closefrom(minfd);
+
+ /* Verify that sudo_closefrom() closed both fds. */
+ ntests++;
+ flag = fcntl(fds[0], F_GETFD, 0);
+#ifdef __APPLE__
+ /* We only set the close-on-exec flag on macOS. */
+ if (flag == 1)
+ flag = -1;
+#endif
+ if (flag != -1) {
+ sudo_warnx("fd %d still open", fds[0]);
+ errors++;
+ goto done;
+ }
+ ntests++;
+ flag = fcntl(fds[1], F_GETFD, 0);
+#ifdef __APPLE__
+ /* We only set the close-on-exec flag on macOS. */
+ if (flag == 1)
+ flag = -1;
+#endif
+ if (flag != -1) {
+ sudo_warnx("fd %d still open", fds[1]);
+ errors++;
+ goto done;
+ }
+
+done:
+ if (ntests != 0) {
+ printf("%s: %d tests run, %d errors, %d%% success rate\n",
+ getprogname(), ntests, errors, (ntests - errors) * 100 / ntests);
+ }
+ return errors;
+}