NEWS,md: Add introductory text for v0.5.7.

[paraslash.git] / ipc.c

diff --git a/ipc.c b/ipc.c
index 674d1cb01e5fae9c5ae2ecb8f8ceec92fa9faa62..9488224a1d4a622860adc957b27977e2bcbfc7e2 100644 (file)
--- a/ipc.c
+++ b/ipc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2011 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -184,6 +184,15 @@ int shm_detach(void *addr)
 #      undef SYSCTL_SHMMAX_VARIABLE
 # endif
 
+/**
+ * Get the maximal size of a shared memory area.
+ *
+ * The value is only computed once when the function is called for the first
+ * time.  Subsequent calls return the number which was computed during the
+ * first call.
+ *
+ * \return A number suitable as an argument to \ref shm_new().
+ */
 size_t shm_get_shmmax(void)
 {
        static size_t shmmax;
@@ -200,6 +209,7 @@ size_t shm_get_shmmax(void)
                                buf[ret] = '\0';
                                shmmax = strtoul(buf, NULL, 10);
                        }
+                       close(fd);
                }
        }
 #elif defined SYSCTL_SHMMAX_VARIABLE
@@ -212,7 +222,7 @@ size_t shm_get_shmmax(void)
 #endif
        if (shmmax == 0) {
                PARA_WARNING_LOG("unable to determine shmmax\n");
-               shmmax = 65535; /* last ressort */
+               shmmax = 65535; /* last resort */
        }
        PARA_INFO_LOG("shmmax: %zu\n", shmmax);
        return shmmax;