Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 100 insertions, 0 deletions

diff --git a/src/global/mbox_conf.c b/src/global/mbox_conf.c
new file mode 100644
index 0000000..2856d86
--- /dev/null
+++ b/src/global/mbox_conf.c
@@ -0,0 +1,100 @@
+/*++
+/* NAME
+/*	mbox_conf 3
+/* SUMMARY
+/*	mailbox lock configuration
+/* SYNOPSIS
+/*	#include <mbox_conf.h>
+/*
+/*	int	mbox_lock_mask(string)
+/*	const char *string;
+/*
+/*	ARGV	*mbox_lock_names()
+/* DESCRIPTION
+/*	The functions in this module translate between external
+/*	mailbox locking method names and internal representations.
+/*
+/*	mbox_lock_mask() translates a string with locking method names
+/*	into a bit mask. Names are separated by comma or whitespace.
+/*	The following gives the method names and corresponding bit
+/*	mask value:
+/* .IP "flock (MBOX_FLOCK_LOCK)"
+/*	Use flock() style lock after opening the file. This is the mailbox
+/*	locking method traditionally used on BSD-ish systems (including
+/*	Ultrix and SunOS). It is not suitable for remote file systems.
+/* .IP "fcntl (MBOX_FCNTL_LOCK)"
+/*	Use fcntl() style lock after opening the file. This is the mailbox
+/*	locking method on System-V-ish systems (Solaris, AIX, IRIX, HP-UX).
+/*	This method is supposed to work for remote systems, but often
+/*	has problems.
+/* .IP "dotlock (MBOX_DOT_LOCK)"
+/*	Create a lock file with the name \fIfilename\fB.lock\fR. This
+/*	method pre-dates kernel locks. This works with remote file systems,
+/*	modulo cache coherency problems.
+/* .PP
+/*	mbox_lock_names() returns an array with the names of available
+/*	mailbox locking methods. The result should be given to argv_free().
+/* DIAGNOSTICS
+/*	Fatal errors: undefined locking method name.
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+
+/* Utility library. */
+
+#include <name_mask.h>
+#include <argv.h>
+
+/* Global library. */
+
+#include <mail_params.h>
+#include <mbox_conf.h>
+
+ /*
+  * The table with available mailbox locking methods. Some systems have
+  * flock() locks; all POSIX-compatible systems have fcntl() locks. Even
+  * though some systems do not use dotlock files by default (4.4BSD), such
+  * locks can be necessary when accessing mailbox files over NFS.
+  */
+static const NAME_MASK mbox_mask[] = {
+#ifdef HAS_FLOCK_LOCK
+    "flock", MBOX_FLOCK_LOCK,
+#endif
+#ifdef HAS_FCNTL_LOCK
+    "fcntl", MBOX_FCNTL_LOCK,
+#endif
+    "dotlock", MBOX_DOT_LOCK,
+    0,
+};
+
+/* mbox_lock_mask - translate mailbox lock names to bit mask */
+
+int     mbox_lock_mask(const char *string)
+{
+    return (name_mask(VAR_MAILBOX_LOCK, mbox_mask, string));
+}
+
+/* mbox_lock_names - return available mailbox lock method names */
+
+ARGV   *mbox_lock_names(void)
+{
+    const NAME_MASK *np;
+    ARGV   *argv;
+
+    argv = argv_alloc(2);
+    for (np = mbox_mask; np->name != 0; np++)
+	argv_add(argv, np->name, ARGV_END);
+    argv_terminate(argv);
+    return (argv);
+}