Mark file local statistics struct static (#63)

Debian uses CPPFLAGS to pass arguments like -D_FORTIFY_SOURCE=2.

Makefile

@@ -1,14 +1,15 @@
 .POSIX:
-CC      = cc
-CFLAGS  = -std=c99 -Wall -Wextra -Wno-missing-field-initializers -Os
-LDFLAGS = -ggdb3
-LDLIBS  =
-PREFIX  = /usr/local
+CC       = cc
+CFLAGS   = -std=c99 -Wall -Wextra -Wno-missing-field-initializers -Os
+CPPFLAGS =
+LDFLAGS  = -ggdb3
+LDLIBS   =
+PREFIX   = /usr/local
 
 all: endlessh
 
 endlessh: endlessh.c
-	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ endlessh.c $(LDLIBS)
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -o $@ endlessh.c $(LDLIBS)
 
 install: endlessh
 	install -d $(DESTDIR)$(PREFIX)/bin

README.md

@@ -108,5 +108,26 @@ to remove GCC-specific options. For example, on Solaris:
 The feature test macros on these systems isn't reliable, so you may also
 need to use `-D__EXTENSIONS__` in `CFLAGS`.
 
+### OpenBSD
+
+The man page needs to go into a different path for OpenBSD's `man` command:
+
+```
+diff --git a/Makefile b/Makefile
+index 119347a..dedf69d 100644
+--- a/Makefile
++++ b/Makefile
+@@ -14,8 +14,8 @@ endlessh: endlessh.c
+ install: endlessh
+        install -d $(DESTDIR)$(PREFIX)/bin
+        install -m 755 endlessh $(DESTDIR)$(PREFIX)/bin/
+-       install -d $(DESTDIR)$(PREFIX)/share/man/man1
+-       install -m 644 endlessh.1 $(DESTDIR)$(PREFIX)/share/man/man1/
++       install -d $(DESTDIR)$(PREFIX)/man/man1
++       install -m 644 endlessh.1 $(DESTDIR)$(PREFIX)/man/man1/
+
+ clean:
+        rm -rf endlessh
+```
 
 [np]: https://nullprogram.com/blog/2019/03/22/

endlessh.c

@@ -105,7 +105,7 @@ logsyslog(enum loglevel level, const char *format, ...)
     }
 }
 
-struct {
+static struct {
     long long connects;
     long long milliseconds;
     long long bytes_sent;
@@ -504,7 +504,7 @@ static void
 config_log(const struct config *c)
 {
     logmsg(log_info, "Port %d", c->port);
-    logmsg(log_info, "Delay %ld", c->delay);
+    logmsg(log_info, "Delay %d", c->delay);
     logmsg(log_info, "MaxLineLength %d", c->max_line_length);
     logmsg(log_info, "MaxClients %d", c->max_clients);
     logmsg(log_info, "BindFamily %s",

util/openbsd/README.md

@@ -0,0 +1,34 @@
+# Running `endlessh` on OpenBSD
+
+## Covering IPv4 and IPv6
+
+If you want to cover both IPv4 and IPv6 you'll need to run *two* instances of
+`endlessh` due to OpenBSD limitations. Here's how I did it:
+
+- copy the `endlessh` script to `rc.d` twice, as `endlessh` and `endlessh6`
+- copy the `config` file to `/etc/endlessh` twice, as `config` and `config6`
+  - use `BindFamily 4` in `config`
+  - use `BindFamily 6` in `config6`
+- in `rc.conf.local` force `endlessh6` to load `config6` like so:
+
+```
+endlessh6_flags=-s -f /etc/endlessh/config6
+endlessh_flags=-s
+```
+
+## Covering more than 128 connections
+
+The defaults in OpenBSD only allow for 128 open file descriptors per process,
+so regardless of the `MaxClients` setting in `/etc/config` you'll end up with
+something like 124 clients at the most.
+You can increase these limits in `/etc/login.conf` for `endlessh` (and
+`endlessh6`) like so:
+
+```
+endlessh:\
+	:openfiles=1024:\
+	:tc=daemon:
+endlessh6:\
+	:openfiles=1024:\
+	:tc=daemon:
+```