[PATCH 06/12] init: fix unused result warnings

[dnietoc]

From: Diego Nieto Cid <dnie...@gmail.com>

    ../../init/init.c: In function 'sigchld_handler':
    ../../init/init.c:91:13: warning: ignoring return value of 'asprintf' 
declared with attribute 'warn_unused_result' [-Wunused-result]
    ../../init/init.c:94:13: warning: ignoring return value of 'asprintf' 
declared with attribute 'warn_unused_result' [-Wunused-result]
    ../../init/init.c:99:13: warning: ignoring return value of 'asprintf' 
declared with attribute 'warn_unused_result' [-Wunused-result]
---
 init/init.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/init/init.c b/init/init.c
index ca40d527..8b897c2d 100644
--- a/init/init.c
+++ b/init/init.c
@@ -86,18 +86,22 @@ sigchld_handler(int signal)
          /* The big magilla bit the dust.  */
          child_pid = -1;
 
+         error_t err;
          char *desc = NULL;
          if (WIFSIGNALED (status))
-           asprintf (&desc, "terminated abnormally (%s)",
-                     strsignal (WTERMSIG (status)));
+           err = asprintf (&desc, "terminated abnormally (%s)",
+                           strsignal (WTERMSIG (status)));
          else if (WIFSTOPPED (status))
-           asprintf (&desc, "stopped abnormally (%s)",
-                     strsignal (WTERMSIG (status)));
+           err = asprintf (&desc, "stopped abnormally (%s)",
+                           strsignal (WTERMSIG (status)));
          else if (WEXITSTATUS (status) == 0)
-           desc = strdup ("finished");
+           desc = strdup ("finished"), err = (desc == 0 ? -1 : 0);
          else
-           asprintf (&desc, "exited with status %d",
-                     WEXITSTATUS (status));
+           err = asprintf (&desc, "exited with status %d",
+                           WEXITSTATUS (status));
+
+         if (err == -1)
+           desc = "couldn't allocate exit reason message";
 
          error (0, 0, "child %s", desc);
          free (desc);
-- 
2.51.0