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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));
}
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