85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
/*++
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/* NAME
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/* mkmap 3
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/* SUMMARY
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/* create or open database, DBM style
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/* SYNOPSIS
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/* #include <mkmap.h>
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/*
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/* MKMAP *mkmap_dbm_open(path)
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/* const char *path;
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/* DESCRIPTION
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/* This module implements support for creating DBM databases.
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/*
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/* mkmap_dbm_open() takes a file name, appends the ".dir" and ".pag"
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/* suffixes, and creates or opens the named DBM database.
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/* This routine is a DBM-specific helper for the more general
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/* mkmap_open() routine.
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/*
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/* All errors are fatal.
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/* SEE ALSO
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/* dict_dbm(3), DBM dictionary interface.
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/* LICENSE
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/* .ad
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/* .fi
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/* The Secure Mailer license must be distributed with this software.
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/* AUTHOR(S)
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/* Wietse Venema
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/* IBM T.J. Watson Research
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/* P.O. Box 704
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/* Yorktown Heights, NY 10598, USA
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/*--*/
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/* System library. */
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#include <sys_defs.h>
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/* Utility library. */
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#include <msg.h>
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#include <mymalloc.h>
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#include <stringops.h>
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#include <dict.h>
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#include <dict_dbm.h>
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/* Application-specific. */
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#include "mkmap.h"
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#ifdef HAS_DBM
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#include <ndbm.h>
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/* mkmap_dbm_open - create or open database */
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MKMAP *mkmap_dbm_open(const char *path)
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{
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MKMAP *mkmap = (MKMAP *) mymalloc(sizeof(*mkmap));
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char *pag_file;
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int pag_fd;
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/*
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* Fill in the generic members.
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*/
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mkmap->lock_file = concatenate(path, ".dir", (char *) 0);
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mkmap->open = dict_dbm_open;
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/*
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* Unfortunately, not all systems support locking on open(), so we open
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* the .dir and .pag files before truncating them. Keep one file open for
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* locking.
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*/
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if ((mkmap->lock_fd = open(mkmap->lock_file, O_CREAT | O_RDWR, 0644)) < 0)
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msg_fatal("open %s: %m", mkmap->lock_file);
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pag_file = concatenate(path, ".pag", (char *) 0);
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if ((pag_fd = open(pag_file, O_CREAT | O_RDWR, 0644)) < 0)
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msg_fatal("open %s: %m", pag_file);
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if (close(pag_fd))
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msg_warn("close %s: %m", pag_file);
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myfree(pag_file);
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return (mkmap);
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}
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#endif
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