SoW-2019-0002: Dynamic Snapshot

[lttng-tools.git] / src / common / utils.c

diff --git a/src/common/utils.c b/src/common/utils.c
index f3cb9e0306e599a3b7aef48bce1812cfc7d6a03a..83d4dbe45e4a9395a3ba2bd5b31a2cf7b2fd7b0c 100644 (file)
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -1,20 +1,10 @@
 /*
- * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
- * Copyright (C) 2013 - Raphaël Beamonte <raphael.beamonte@gmail.com>
- * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2013 Raphaël Beamonte <raphael.beamonte@gmail.com>
+ * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
  *
- * 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., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #define _LGPL_SOURCE
@@ -744,7 +734,8 @@ int utils_stream_file_path(const char *path_name, const char *file_name,
         char count_str[MAX_INT_DEC_LEN(count) + 1] = {};
        const char *path_separator;
 
-       if (path_name && path_name[strlen(path_name) - 1] == '/') {
+       if (path_name && (path_name[0] == '\0' ||
+                       path_name[strlen(path_name) - 1] == '/')) {
                path_separator = "";
        } else {
                path_separator = "/";
@@ -1536,3 +1527,40 @@ int utils_change_working_directory(const char *path)
 end:
        return ret;
 }
+
+LTTNG_HIDDEN
+int utils_parse_unsigned_long_long(const char *str,
+               unsigned long long *value)
+{
+       int ret;
+       char *endptr;
+
+       assert(str);
+       assert(value);
+
+       errno = 0;
+       *value = strtoull(str, &endptr, 10);
+
+       /* Conversion failed.  Out of range? */
+       if (errno != 0) {
+               ret = -1;
+               goto end;
+       }
+
+       /* Not the end of the string? */
+       if (*endptr) {
+               ret = -1;
+               goto end;
+       }
+
+       /* Empty string? */
+       if (endptr == str) {
+               ret = -1;
+               goto end;
+       }
+
+       ret = 0;
+
+end:
+       return ret;
+}