Implement locking

* src/lock.c: New file.
* gnulib.modules (sysexits, xgethostname): New modules.
* src/lock.c: New file.
* src/Makefile.am: Add lock.c
* src/config.c: Locking keywords.
* src/job.c: Requeue jobs if locking fails.
* src/wydawca.c (wydawca_uid): Rename to wydawca_set_uid
(main): Implement restart.
* src/process.c (scan_spool, scan_all_spools): Use locking, if configured.
* src/directive.c, src/diskio.c, src/triplet.c: Rename
wydawca_uid
* src/exec.c, src/getopt.m4, src/net.c,
src/pidfile.c: Use standard error codes from sysexits.h
* tests/etc/wydawca.rcin: Disable locking.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/getopt.m4 b/src/getopt.m4
index 83cc45f..2cd9a0f 100644
--- a/src/getopt.m4
+++ b/src/getopt.m4
@@ -179,7 +179,7 @@ ifelse([<$#>],3,opterr = 0;)
       switch (c)
         {
         default:
-	ifelse([<$#>],3,$3,[<exit(1)>]);
+	ifelse([<$#>],3,$3,[<exit (EX_USAGE)>]);
 
 	undivert(4)
         }