1 files changed, 78 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/src/setuidgid.c b/web/server/h2o/libh2o/src/setuidgid.c
new file mode 100644
index 00000000..f663cff1
--- /dev/null
+++ b/web/server/h2o/libh2o/src/setuidgid.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2015 DeNA Co., Ltd., Kazuho Oku
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+#include <errno.h>
+#include <grp.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+/* taken from sysexits.h */
+#ifndef EX_OSERR
+#define EX_OSERR 71
+#endif
+#ifndef EX_CONFIG
+#define EX_CONFIG 78
+#endif
+
+int main(int argc, char **argv)
+{
+    struct passwd *user;
+
+    if (argc < 3) {
+        fprintf(stderr, "no command (usage: setuidgid user cmd args...)\n");
+        return EX_CONFIG;
+    }
+    --argc;
+    ++argv;
+
+    errno = 0;
+    if ((user = getpwnam(*argv)) == NULL) {
+        if (errno == 0) {
+            fprintf(stderr, "unknown user:%s\n", *argv);
+            return EX_CONFIG;
+        } else {
+            perror("getpwnam");
+            return EX_OSERR;
+        }
+    }
+    --argc;
+    ++argv;
+
+    if (setgid(user->pw_gid) != 0) {
+        perror("setgid failed");
+        return EX_OSERR;
+    }
+    if (initgroups(user->pw_name, user->pw_gid) != 0) {
+        perror("initgroups failed");
+        return EX_OSERR;
+    }
+    if (setuid(user->pw_uid) != 0) {
+        perror("setuid failed");
+        return EX_OSERR;
+    }
+
+    execvp(*argv, argv);
+    fprintf(stderr, "execvp failed to launch file:%s:%s\n", *argv, strerror(errno));
+    return EX_OSERR;
+}