Fix UST renaming and update ust headers

[lttng-tools.git] / ltt-sessiond / utils.c

diff --git a/ltt-sessiond/utils.c b/ltt-sessiond/utils.c
index 5477270fba4204455d1583c0a34bbc69e49e00db..0da5642109fcc5ddf7eeced026a0d441cb685594 100644 (file)
--- a/ltt-sessiond/utils.c
+++ b/ltt-sessiond/utils.c
@@ -1,19 +1,19 @@
 /*
- * Copyright (C)  2011 - David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * 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; only version 2
- * of the License.
+ * 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; only version 2 of the License.
  *
- * 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.
+ * 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.
  */
 
 #define _GNU_SOURCE
@@ -26,13 +26,29 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
+#include <lttngerr.h>
+
 #include "utils.h"
 
 /*
- *  get_home_dir
+ * Write to writable pipe used to notify a thread.
+ */
+int notify_thread_pipe(int wpipe)
+{
+       int ret;
+
+       ret = write(wpipe, "!", 1);
+       if (ret < 0) {
+               PERROR("write poll pipe");
+       }
+
+       return ret;
+}
+
+/*
+ * Return pointer to home directory path using the env variable HOME.
  *
- *  Return pointer to home directory path using the env variable HOME.
- *  No home, NULL is returned.
+ * No home, NULL is returned.
  */
 const char *get_home_dir(void)
 {
@@ -40,51 +56,76 @@ const char *get_home_dir(void)
 }
 
 /*
- *  mkdir_recursive
- *
- *  Create recursively directory using the FULL path.
+ * Create recursively directory using the FULL path.
  */
-int mkdir_recursive(const char *path, mode_t mode)
+int mkdir_recursive(const char *path, mode_t mode, uid_t uid, gid_t gid)
 {
-    int ret;
-    char *p, tmp[PATH_MAX];
-    size_t len;
-    mode_t old_umask;
+       int ret;
+       char *p, tmp[PATH_MAX];
+       size_t len;
+       mode_t old_umask;
 
-    ret = snprintf(tmp, sizeof(tmp), "%s", path);
+       ret = snprintf(tmp, sizeof(tmp), "%s", path);
        if (ret < 0) {
-               perror("snprintf mkdir");
+               PERROR("snprintf mkdir");
                goto error;
        }
 
-    len = ret;
-    if (tmp[len - 1] == '/') {
-        tmp[len - 1] = 0;
-    }
+       len = ret;
+       if (tmp[len - 1] == '/') {
+               tmp[len - 1] = 0;
+       }
 
-    old_umask = umask(0);
-    for (p = tmp + 1; *p; p++) {
-        if (*p == '/') {
-            *p = 0;
-            ret = mkdir(tmp, mode);
-            if (ret < 0) {
-                if (!(errno == EEXIST)) {
-                                       perror("mkdir recursive");
-                                       ret = errno;
-                    goto umask_error;
-                }
-            }
-            *p = '/';
-        }
-    }
+       old_umask = umask(0);
+       for (p = tmp + 1; *p; p++) {
+               if (*p == '/') {
+                       *p = 0;
+                       ret = mkdir(tmp, mode);
+                       if (ret < 0) {
+                               if (!(errno == EEXIST)) {
+                                       PERROR("mkdir recursive");
+                                       ret = -errno;
+                                       goto umask_error;
+                               }
+                       } else if (ret == 0) {
+                               /*
+                                * We created the directory. Set its ownership to the
+                                * user/group specified.
+                                */
+                               ret = chown(tmp, uid, gid);
+                               if (ret < 0) {
+                                       PERROR("chown in mkdir recursive");
+                                       ret = -errno;
+                                       goto umask_error;
+                               }
+                       }
+                       *p = '/';
+               }
+       }
 
-    ret = mkdir(tmp, mode);
+       ret = mkdir(tmp, mode);
        if (ret < 0) {
-               ret = errno;
+               if (!(errno == EEXIST)) {
+                       PERROR("mkdir recursive last piece");
+                       ret = -errno;
+               } else {
+                       ret = 0;
+               }
+       } else if (ret == 0) {
+               /*
+                * We created the directory. Set its ownership to the user/group
+                * specified.
+                */
+               ret = chown(tmp, uid, gid);
+               if (ret < 0) {
+                       PERROR("chown in mkdir recursive");
+                       ret = -errno;
+                       goto umask_error;
+               }
        }
 
 umask_error:
        umask(old_umask);
 error:
-    return ret;
+       return ret;
 }