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-rw-r--r--src/global/file_id.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/src/global/file_id.c b/src/global/file_id.c
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+/*++
+/* 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));
+}