fail on ENOSPC when calling dprintf()

dprintf() may return a non-negative value and still set ENOSPC
on partially-written data.

1 files changed, 4 insertions, 1 deletions

diff --git a/pidfile.c b/pidfile.c
index a0a9fae..f19ae88 100644
--- a/pidfile.c
+++ b/pidfile.c
@@ -76,8 +76,11 @@ int mog_pidfile_commit(int fd)
         assert(lseek(fd, 0, SEEK_CUR) == 0 && "pidfile offset != 0");
         assert(pidfile && "mog_pidfile_open not called (or unsuccessful)");
 
-        if (dprintf(fd, "%d\n", (int)getpid()) <= 1) {
+        errno = 0;
+        if (dprintf(fd, "%d\n", (int)getpid()) <= 1 || errno == ENOSPC) {
                 PRESERVE_ERRNO( close(fd) );
+                if (errno == ENOSPC)
+                        PRESERVE_ERRNO( pidfile_atexit() );
                 return -1;
         }
         if (close(fd) < 0 && errno != EINTR)