X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/763d5e6ad88ef3ba1cd1d7742d060e4f1e54c6b8..7489d3af05a4394e9621e14a196a9f6c4f788a26:/lib/user.c

diff --git a/lib/user.c b/lib/user.c
index 2616de3..d6b47aa 100644
--- a/lib/user.c
+++ b/lib/user.c
@@ -1,27 +1,28 @@
 /*
  * This file is part of DisOrder
- * Copyright (C) 2005 Richard Kettlewell
+ * Copyright (C) 2005, 2007 Richard Kettlewell
  *
- * This program is free software; you can redistribute it and/or modify
+ * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/** @file lib/user.c
+ * @brief Jukebox user management
  */
 
-#include <config.h>
-#include "types.h"
+#include "common.h"
 
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <errno.h>
 #include <pwd.h>
 #include <grp.h>
@@ -30,27 +31,79 @@
 #include "user.h"
 #include "log.h"
 #include "configuration.h"
+#include "mem.h"
 
+/** @brief Become the jukebox user
+ *
+ * If a jukebox user is configured then becomes that user.
+ */
 void become_mortal(void) {
   struct passwd *pw;
   
   if(config->user) {
     if(!(pw = getpwnam(config->user)))
-      fatal(0, "cannot find user %s", config->user);
+      disorder_fatal(0, "cannot find user %s", config->user);
     if(pw->pw_uid != getuid()) {
+      disorder_info("becoming user %u group %u",
+                    (unsigned)pw->pw_uid,
+                    (unsigned)pw->pw_gid);
       if(initgroups(config->user, pw->pw_gid))
-	fatal(errno, "error calling initgroups");
-      if(setgid(pw->pw_gid) < 0) fatal(errno, "error calling setgid");
-      if(setuid(pw->pw_uid) < 0) fatal(errno, "error calling setgid");
-      info("changed to user %s (uid %lu)", config->user, (unsigned long)getuid());
+	disorder_fatal(errno, "error calling initgroups");
+      if(setgid(pw->pw_gid) < 0)
+        disorder_fatal(errno, "error calling setgid");
+      if(setuid(pw->pw_uid) < 0)
+        disorder_fatal(errno, "error calling setgid");
+      disorder_info("changed to user %s (uid %lu)",
+                    config->user, (unsigned long)getuid());
     }
     /* sanity checks */
-    if(getuid() != pw->pw_uid) fatal(0, "wrong real uid");
-    if(geteuid() != pw->pw_uid) fatal(0, "wrong effective uid");
-    if(getgid() != pw->pw_gid) fatal(0, "wrong real gid");
-    if(getegid() != pw->pw_gid) fatal(0, "wrong effective gid");
-    if(setuid(0) != -1) fatal(0, "setuid(0) unexpectedly succeeded");
-    if(seteuid(0) != -1) fatal(0, "seteuid(0) unexpectedly succeeded");
+    if(getuid() != pw->pw_uid)
+      disorder_fatal(0, "wrong real uid");
+    if(geteuid() != pw->pw_uid)
+      disorder_fatal(0, "wrong effective uid");
+    if(getgid() != pw->pw_gid)
+      disorder_fatal(0, "wrong real gid");
+    if(getegid() != pw->pw_gid)
+      disorder_fatal(0, "wrong effective gid");
+    if(setuid(0) != -1)
+      disorder_fatal(0, "setuid(0) unexpectedly succeeded");
+    if(seteuid(0) != -1)
+      disorder_fatal(0, "seteuid(0) unexpectedly succeeded");
+  }
+}
+
+/** @brief Create the jukebox state directory
+ *
+ * If the home directory does not exist then creates it and assigns
+ * it suitable permissions.
+ */
+void make_home(void) {
+  struct stat sb;
+  struct passwd *pw;
+  char *home, *p;
+  
+  if(stat(config->home, &sb) < 0) {
+    /* create parent directories */
+    home = xstrdup(config->home);
+    p = home;
+    while(*p) {
+      if(*p == '/' && p > home) {
+        *p = 0;
+        mkdir(home, 0755);
+        *p = '/';
+      }
+      ++p;
+    }
+    /* create the directory itself */
+    if(mkdir(config->home, 02755) < 0)
+      disorder_fatal(errno, "error creating %s", config->home);
+    /* make sure it has the right ownership */
+    if(config->user) {
+      if(!(pw = getpwnam(config->user)))
+        disorder_fatal(0, "cannot find user %s", config->user);
+      if(chown(config->home, pw->pw_uid, pw->pw_gid) < 0)
+        disorder_fatal(errno, "error chowning %s", config->home);
+    }
   }
 }