Imported Upstream version 1.8.1p2

[debian/sudo] / plugins / sudoers / boottime.c

diff --git a/plugins/sudoers/boottime.c b/plugins/sudoers/boottime.c
new file mode 100644 (file)
index 0000000..96576f8
--- /dev/null
+++ b/plugins/sudoers/boottime.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2009-2011 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * 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 <sys/param.h>
+#include <sys/types.h>
+#include <sys/time.h>
+
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
+#  include <memory.h>
+# endif
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#include <limits.h>
+#if TIME_WITH_SYS_TIME
+# include <time.h>
+#endif
+#ifndef __linux__
+# if defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
+#  include <sys/sysctl.h>
+# elif defined(HAVE_GETUTXID)
+#  include <utmpx.h>
+# elif defined(HAVE_GETUTID)
+#  include <utmp.h>
+# endif
+#endif /* !__linux__ */
+
+#include "missing.h"
+
+/*
+ * Fill in a struct timeval with the time the system booted.
+ * Returns 1 on success and 0 on failure.
+ */
+
+#if defined(__linux__)
+int
+get_boottime(struct timeval *tv)
+{
+    char *line = NULL;
+    size_t linesize = 0;
+    ssize_t len;
+    FILE * fp;
+
+    /* read btime from /proc/stat */
+    fp = fopen("/proc/stat", "r");
+    if (fp != NULL) {
+       while ((len = getline(&line, &linesize, fp)) != -1) {
+           if (strncmp(line, "btime ", 6) == 0) {
+               tv->tv_sec = atoi(line + 6);
+               tv->tv_usec = 0;
+               return 1;
+           }
+       }
+       fclose(fp);
+       free(line);
+    }
+
+    return 0;
+}
+
+#elif defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
+
+int
+get_boottime(struct timeval *tv)
+{
+    size_t size;
+    int mib[2];
+
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_BOOTTIME;
+    size = sizeof(*tv);
+    if (sysctl(mib, 2, tv, &size, NULL, 0) != -1)
+       return 1;
+
+    return 0;
+}
+
+#elif defined(HAVE_GETUTXID)
+
+int
+get_boottime(struct timeval *tv)
+{
+    struct utmpx *ut, key;
+
+    memset(&key, 0, sizeof(key));
+    key.ut_type = BOOT_TIME;
+    setutxent();
+    if ((ut = getutxid(&key)) != NULL) {
+       tv->tv_sec = ut->ut_tv.tv_sec;
+       tv->tv_usec = ut->ut_tv.tv_usec;
+    }
+    endutxent();
+    return ut != NULL;
+}
+
+#elif defined(HAVE_GETUTID)
+
+int
+get_boottime(struct timeval *tv)
+{
+    struct utmp *ut, key;
+
+    memset(&key, 0, sizeof(key));
+    key.ut_type = BOOT_TIME;
+    setutent();
+    if ((ut = getutid(&key)) != NULL) {
+       tv->tv_sec = ut->ut_time;
+       tv->tv_usec = 0;
+    }
+    endutent();
+    return ut != NULL;
+}
+
+#else
+
+int
+get_boottime(struct timeval *tv)
+{
+    return 0;
+}
+#endif