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, 2 insertions, 0 deletions

diff --git a/tests/etc/wydawca.rcin b/tests/etc/wydawca.rcin
index 36ef7a2..bc6aaa4 100644
--- a/tests/etc/wydawca.rcin
+++ b/tests/etc/wydawca.rcin
@@ -18,6 +18,8 @@ statistics all;
 
 umask 022;
 
+locking no;
+
 access-method project-owner {
   type builtin;
   query "${project}";