Fix: add a get HOME dir fallback to getpwuid

If the $HOME or $LTTNG_HOME is not defined, fallback on getpwuid(3) of
the process uid.

Fixes #815

Signed-off-by: David Goulet <dgoulet@efficios.com>

diff --git a/src/common/utils.c b/src/common/utils.c
index 936580029e4a97dff9a20f03a7570aa22ef14f78..f02ff1ec866487464f6f797f61f136a4029b9948 100644 (file)
--- a/src/common/utils.c
+++ b/src/common/utils.c
@@ -820,11 +820,28 @@ LTTNG_HIDDEN
 char *utils_get_home_dir(void)
 {
        char *val = NULL;
+       struct passwd *pwd;
+
        val = getenv(DEFAULT_LTTNG_HOME_ENV_VAR);
        if (val != NULL) {
-               return val;
+               goto end;
+       }
+       val = getenv(DEFAULT_LTTNG_FALLBACK_HOME_ENV_VAR);
+       if (val != NULL) {
+               goto end;
        }
-       return getenv(DEFAULT_LTTNG_FALLBACK_HOME_ENV_VAR);
+
+       /* Fallback on the password file entry. */
+       pwd = getpwuid(getuid());
+       if (!pwd) {
+               goto end;
+       }
+       val = pwd->pw_dir;
+
+       DBG3("Home directory is '%s'", val);
+
+end:
+       return val;
 }
 
 /*