snac2

commit cdfaf6dc57a03503cec46cad5fbfd6fec45b0f52
parent 4777fc86cb962917a8f34afb3bfa40f26290815d
Author: default <nobody@localhost>
Date:   Tue, 21 May 2024 18:57:13 +0200

New compilation variable WITHOUT_SHM, to disable shared memory functions.

Diffstat:
M
README.md
 | 
6
++++++
M
httpd.c
 | 
23
+++++++++++++++++++++++

2 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/README.md b/README.md
@@ -71,6 +71,12 @@ If your compilation process complains about undefined references to `shm_open()`
 make LDFLAGS=-lrt
 ```
 
+If it still doesn't work (because your system does not implement the shared memory functions) or you are just not interested, you can compile out with
+
+```sh
+make CFLAGS=-DWITHOUT_SHM
+```
+
 See the administrator manual on how to proceed from here.
 
 ## Testing via Docker
diff --git a/httpd.c b/httpd.c
@@ -653,6 +653,29 @@ void term_handler(int s)
 }
 
 
+#ifdef WITHOUT_SHM
+
+/* dummy versions */
+
+int shm_open(const char *name, int flags, mode_t mode)
+{
+    (void)name;
+    (void)flags;
+    (void)mode;
+
+    errno = ENOTSUP;
+    return -1;
+}
+
+int shm_unlink(const char *name)
+{
+    (void)name;
+    return -1;
+}
+
+
+#endif
+
 srv_state *srv_state_op(xs_str **fname, int op)
 /* opens or deletes the shared memory object */
 {