relayd: introduce --working-directory/-w options

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

diff --git a/src/common/utils.c b/src/common/utils.c
index 3cdb6b76063caf4545761a93b52523dd2c39b14c..0147c8c994d3cb89f7fa936633863e043cdd2221 100644 (file)
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -1501,3 +1501,35 @@ int utils_get_memory_total(size_t *value)
 {
        return read_proc_meminfo_field(PROC_MEMINFO_MEMTOTAL_LINE, value);
 }
+
+LTTNG_HIDDEN
+int utils_change_working_directory(const char *path)
+{
+       int ret;
+
+       assert(path);
+
+       DBG("Changing working directory to \"%s\"", path);
+       ret = chdir(path);
+       if (ret) {
+               PERROR("Failed to change working directory to \"%s\"", path);
+               goto end;
+       }
+
+       /* Check for write access */
+       if (access(path, W_OK)) {
+               if (errno == EACCES) {
+                       /*
+                        * Do not treat this as an error since the permission
+                        * might change in the lifetime of the process
+                        */
+                       DBG("Working directory \"%s\" is not writable", path);
+               } else {
+                       PERROR("Failed to check if working directory \"%s\" is writable",
+                                       path);
+               }
+       }
+
+end:
+       return ret;
+}