Imported Upstream version 1.8.2

[debian/sudo] / common / setgroups.c

diff --git a/common/setgroups.c b/common/setgroups.c
new file mode 100644 (file)
index 0000000..c469d20
--- /dev/null
+++ b/common/setgroups.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 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.
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#include <sys/types.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_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#include <errno.h>
+#include <limits.h>
+
+#include "missing.h"
+
+int
+sudo_setgroups(int ngids, const GETGROUPS_T *gids)
+{
+    int maxgids, rval;
+
+    rval = setgroups(ngids, gids);
+    if (rval == -1 && errno == EINVAL) {
+       /* Too many groups, try again with fewer. */
+#if defined(HAVE_SYSCONF) && defined(_SC_NGROUPS_MAX)
+       maxgids = (int)sysconf(_SC_NGROUPS_MAX);
+       if (maxgids == -1)
+#endif
+           maxgids = NGROUPS_MAX;
+       if (ngids > maxgids)
+           rval = setgroups(maxgids, gids);
+    }
+    return rval;
+}