1 files changed, 118 insertions, 0 deletions
diff --git a/plugins/sudoers/regress/starttime/check_starttime.c b/plugins/sudoers/regress/starttime/check_starttime.c
new file mode 100644
index 0000000..8951443
--- /dev/null
+++ b/plugins/sudoers/regress/starttime/check_starttime.c
@@ -0,0 +1,118 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2017 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 <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "sudo_compat.h"
+#include "sudo_util.h"
+#include "sudo_fatal.h"
+#include "check.h"
+
+sudo_dso_public int main(int argc, char *argv[]);
+
+#ifdef __linux__
+static int
+get_now(struct timespec *now)
+{
+    const char *errstr;
+    char buf[1024];
+    time_t seconds;
+    int ret = -1;
+    FILE *fp;
+
+    /* Linux process start time is relative to boot time. */
+    fp = fopen("/proc/stat", "r");
+    if (fp != NULL) {
+	while (fgets(buf, sizeof(buf), fp) != NULL) {
+	    if (strncmp(buf, "btime ", 6) != 0)
+		continue;
+	    buf[strcspn(buf, "\n")] = '\0';
+
+	    /* Boot time is in seconds since the epoch. */
+	    seconds = sudo_strtonum(buf + 6, 0, TIME_T_MAX, &errstr);
+	    if (errstr != NULL)
+		return -1;
+
+	    /* Instead of the real time, "now" is relative to boot time. */
+	    if (sudo_gettime_real(now) == -1)
+		return -1;
+	    now->tv_sec -= seconds;
+	    ret = 0;
+	    break;
+	}
+	fclose(fp);
+    }
+    return ret;
+}
+#else
+static int
+get_now(struct timespec *now)
+{
+    /* Process start time is relative to wall clock time. */
+    return sudo_gettime_real(now);
+}
+#endif
+
+int
+main(int argc, char *argv[])
+{
+    int ntests = 0, errors = 0;
+    struct timespec now, then, delta;
+    pid_t pids[2];
+    int i;
+
+    initprogname(argc > 0 ? argv[0] : "check_starttime");
+
+    if (get_now(&now) == -1)
+	sudo_fatal_nodebug("unable to get current time");
+
+    pids[0] = getpid();
+    pids[1] = getppid();
+
+    for (i = 0; i < 2; i++) {
+	ntests++;
+	if (get_starttime(pids[i], &then)  == -1) {
+	    printf("%s: test %d: unable to get start time for pid %d\n",
+		getprogname(), ntests, (int)pids[i]);
+	    errors++;
+	}
+	if (i != 0)
+	    continue;
+
+	/* Verify our own process start time, allowing for some drift. */
+	ntests++;
+	sudo_timespecsub(&then, &now, &delta);
+	if (delta.tv_sec > 30 || delta.tv_sec < -30) {
+	    printf("%s: test %d: unexpected start time for pid %d: %s",
+		getprogname(), ntests, (int)pids[i], ctime(&then.tv_sec));
+	    errors++;
+	}
+    }
+
+    printf("%s: %d tests run, %d errors, %d%% success rate\n", getprogname(),
+	ntests, errors, (ntests - errors) * 100 / ntests);
+
+    exit(errors);
+}