1 files changed, 101 insertions, 0 deletions
diff --git a/src/global/file_id.c b/src/global/file_id.c
new file mode 100644
index 0000000..b373056
--- /dev/null
+++ b/src/global/file_id.c
@@ -0,0 +1,101 @@
+/*++
+/* NAME
+/*	file_id 3
+/* SUMMARY
+/*	file ID printable representation
+/* SYNOPSIS
+/*	#include <file_id.h>
+/*
+/*	const char *get_file_id_fd(fd, long_flag)
+/*	int	fd;
+/*	int	long_flag;
+/*
+/*	const char *get_file_id_st(st, long_flag)
+/*	struct stat *st;
+/*	int	long_flag;
+/*
+/*	const char *get_file_id(fd)
+/*	int	fd;
+/* DESCRIPTION
+/*	get_file_id_fd() queries the operating system for the unique
+/*	file identifier for the specified file descriptor and returns
+/*	a printable representation.  The result is volatile.  Make
+/*	a copy if it is to be used for any appreciable amount of
+/*	time.
+/*
+/*	get_file_id_st() returns the unique identifier for the
+/*	specified file status information.
+/*
+/*	get_file_id() provides binary compatibility for old programs.
+/*	This function should not be used by new programs.
+/*
+/*	Arguments:
+/* .IP fd
+/*	A valid file descriptor that is associated with an open file.
+/* .IP st
+/*	The result from e.g., stat(2) or fstat(2).
+/* .IP long_flag
+/*	Encode the result as appropriate for long or short queue
+/*	identifiers.
+/* DIAGNOSTICS
+/*	All errors are fatal.
+/* 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>
+#include <sys/stat.h>
+#include <string.h>
+
+/* Utility library */
+
+#include <msg.h>
+#include <vstring.h>
+#include <warn_stat.h>
+
+/* Global library. */
+
+#define MAIL_QUEUE_INTERNAL
+#include <mail_queue.h>
+#include "file_id.h"
+
+/* get_file_id - binary compatibility */
+
+const char *get_file_id(int fd)
+{
+    return (get_file_id_fd(fd, 0));
+}
+
+/* get_file_id_fd - return printable file identifier for file descriptor */
+
+const char *get_file_id_fd(int fd, int long_flag)
+{
+    struct stat st;
+
+    if (fstat(fd, &st) < 0)
+	msg_fatal("fstat: %m");
+    return (get_file_id_st(&st, long_flag));
+}
+
+/* get_file_id_st - return printable file identifier for file status */
+
+const char *get_file_id_st(struct stat * st, int long_flag)
+{
+    static VSTRING *result;
+
+    if (result == 0)
+	result = vstring_alloc(1);
+    if (long_flag)
+	return (MQID_LG_ENCODE_INUM(result, st->st_ino));
+    else
+	return (MQID_SH_ENCODE_INUM(result, st->st_ino));
+}