Initial import of the CDE 2.1.30 sources from the Open Group.
This commit is contained in:
Peter Howkins
282
cde/lib/DtSearch/opendblk.c
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282
cde/lib/DtSearch/opendblk.c
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/*
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* COMPONENT_NAME: austext
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*
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* FUNCTIONS: open_dblk
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*
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* ORIGINS: 27
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*
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* (C) COPYRIGHT International Business Machines Corp. 1993,1995
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* All Rights Reserved
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* US Government Users Restricted Rights - Use, duplication or
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* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
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*/
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/*********************** OPENDBLK.C ************************
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* $XConsortium: opendblk.c /main/5 1996/05/07 13:43:01 drk $
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* October 1993.
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* Opens all vista and the d99 database files in a dblk list.
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* Most errors are handled by disconnecting the offending
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* dblk from the list. Of course loss of ALL dblks is fatal.
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*
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* The nonvista d99 files (words inverted index) are opened,
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* mostly to test if they can be found. If not, we can return
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* a complete error message for the single dblk and unlink it.
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* Vista can only open all databases at once.
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*
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* Does not use dmacros.h for vista calls so error msgs can be
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* constructed and added to global msglist (although hard vista
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* errors will still first send a msg to stdout via dberr.c).
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*
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* Open_dblk() should be used to replace all OPEN() calls
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* in systems using DBLK structures.
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* (1) It does not open dictionary files because they are not
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* always needed (in OE, these are opened in oeinit.c).
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* (2) It does not read dbrec system records because the caller may
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* want to initialize them (in OE, these are read and
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* validated by ve_initialize() in ve.c).
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* (3) It does not open the other d9x files because they
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* may not be present, depending on values in dbrec record.
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*
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* INPUT:
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* 'dblist' is linked list of dblks.
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* Each dblk must have valid 'name' field,
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* and 'path' field must be NULL or a valid path string.
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* 'numpages' is the number of vista cache pages to be opened.
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* Where speed is critical it should be 64--
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* for normal operations it should be no less than 16.
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* 'debugging' is a boolean. It is usually set to (usrblk.debug & USRDBG_RARE)
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* and if TRUE, trace msgs are written to stdout.
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*
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* OUTPUT:
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* Sets correct vistano, iifile, and iimtime fields in each surviving dblk.
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* Places all err msgs on global msglist as they occur.
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* Sets austext_exit_dbms to d_close() on success (retncode > 0).
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* Returns TRUE if at least some of the databases were opened.
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* Bad dblks are unlinked from dblist and freed.
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* Returns FALSE if fatal errors.
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*
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* $Log$
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* Revision 2.5 1996/02/01 19:19:41 miker
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* Minor change to err msg.
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*
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* Revision 2.4 1995/10/25 15:26:16 miker
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* Added prolog.
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*
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* Revision 2.3 1995/10/19 20:25:52 miker
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* Renaming database files no longer required.
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* Transaction logging disabled, no space needed for overflow files.
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* Open mode of non-vista database files also tracks new vista db_oflag.
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*
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* Revision 2.2 1995/10/03 21:45:26 miker
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* Cosmetic msg changes only.
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*
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* Revision 2.1 1995/09/22 21:38:03 miker
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* Freeze DtSearch 0.1, AusText 2.1.8
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*
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* Revision 1.8 1995/09/05 19:04:40 miker
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* Name and msgs changes for DtSearch. Made ausapi_msglist universal.
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*/
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#include "SearchE.h"
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include "vista.h"
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#define PROGNAME "OPENDBLK"
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#define MS_misc 1
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#define MS_oeinit 9
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#define MS_vista 13
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/****************************************/
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/* */
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/* open_dblk */
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/* */
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/****************************************/
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/* dblk.path may be NULL */
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int open_dblk (DBLK ** dblist, int numpages, int debugging)
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{
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DBLK *db, *bad_db, **lastlink;
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int i;
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size_t totlen = 0L;
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char *allnames;
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int vistano = 0;
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char *srcptr, *targptr;
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char temp_file_name[1024];
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char sprintbuf[1024];
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struct stat statbuf;
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char open_mode [8];
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if (debugging)
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fprintf (aa_stderr, PROGNAME"76 "
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"Entering open_dblks(). db_oflag==%d.\n",
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db_oflag);
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if (dblist == NULL || numpages < 8) {
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BAD_INPUT:
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sprintf (sprintbuf, catgets (dtsearch_catd, MS_oeinit, 99,
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"%s Programming Error: Invalid input to open_dblk()."),
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PROGNAME "99");
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DtSearchAddMessage (sprintbuf);
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return FALSE;
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}
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if (*dblist == NULL) /* empty list of dblks */
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goto BAD_INPUT;
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if (debugging) {
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fprintf (aa_stderr, PROGNAME "96 Current list of dblks:\n");
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for (db = *dblist; db != NULL; db = db->link) {
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targptr = sprintbuf;
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for (i = 0; i < db->ktcount; i++) {
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*targptr++ = db->keytypes[i].ktchar;
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}
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*targptr = 0;
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fprintf (aa_stderr, "--> DBLK at %p link=%p name='%s' maxhits=%d\n"
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" keytypes='%s', path='%s'\n",
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db, db->link, db->name, db->maxhits,
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sprintbuf, NULLORSTR (db->path));
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}
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}
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/* By doing setpages first, we can trap previously opened databases.
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* Overflow and transaction locking files are not required.
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*/
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d_setpages (numpages, 0);
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if (db_status != S_OKAY) {
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DtSearchAddMessage (vista_msg (PROGNAME "389"));
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return FALSE;
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}
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/* ---- PASS #1 ------------------------------------------
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* Open nonvista (d99) files. If error, unlink dblk from dblist.
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* Add up the total string length of surviving paths and database names.
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* This giant path/file string will be used in the single d_open()
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* below to find the .dbd files.
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* While we're at it, set vistano in each dblk.
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* The open mode depends on the current setting of db_oflag.
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*/
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if (db_oflag == O_RDONLY)
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strcpy (open_mode, "rb");
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else
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strcpy (open_mode, "r+b");
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db = *dblist;
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lastlink = dblist;
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while (db != NULL) {
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if (db->path == NULL)
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db->path = strdup ("");
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strcpy (temp_file_name, db->path);
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strcat (temp_file_name, db->name);
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strcat (temp_file_name, EXT_DTBS);
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if ((db->iifile = fopen (temp_file_name, open_mode)) == NULL) {
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if (debugging)
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fprintf (aa_stderr, PROGNAME "129 UNLINK: cant open '%s'.\n",
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temp_file_name);
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sprintf (sprintbuf, catgets (dtsearch_catd, MS_oeinit, 317,
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"%s Cannot open database file '%s'.\n"
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" Errno %d = %s\n"
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" %s is removing '%s' from list of available databases."),
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PROGNAME "317", temp_file_name, errno, strerror (errno),
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OE_prodname, db->name);
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if (errno == ENOENT)
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strcat (sprintbuf, catgets (dtsearch_catd, MS_oeinit, 318,
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"\n This can usually be corrected by specifying a valid\n"
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" database PATH in the site configuration file."));
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DtSearchAddMessage (sprintbuf);
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goto DELETE_DB;
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}
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/*
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* Find and save the timestamp for when the d99 file was
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* last modified. An engine reinit is forced if it changes
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* while the engine is running.
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*/
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if (fstat (fileno (db->iifile), &statbuf) == -1) {
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if (debugging)
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fprintf (aa_stderr,
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PROGNAME "149 UNLINK: cant get status '%s'.\n",
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temp_file_name);
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sprintf (sprintbuf, catgets (dtsearch_catd, MS_oeinit, 1404,
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"%s Removing database '%s' from list of "
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"available databases because status is "
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"unavailable for file %s: %s"),
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PROGNAME "1404", db->name, temp_file_name, strerror (errno));
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DtSearchAddMessage (sprintbuf);
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goto DELETE_DB;
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}
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db->iimtime = statbuf.st_mtime;
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/*
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* This dblk is ok so far. Increment pointers and
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* continue.
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*/
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if (debugging)
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fprintf (aa_stderr, PROGNAME "163 opened '%s'.\n", temp_file_name);
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db->vistano = vistano++;
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totlen += strlen (db->path) + strlen (db->name) + 16;
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lastlink = &db->link;
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db = db->link;
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continue;
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DELETE_DB:
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/*
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* This dblk failed in one or more ways. Unlink it and
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* don't increment pointers. If all dblks unlinked, *dblist
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* will = NULL.
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*/
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bad_db = db; /* temp save */
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*lastlink = db->link;
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db = db->link;
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free (bad_db);
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} /* end PASS #1 */
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/* quit if no dblks remain */
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if (vistano <= 0) {
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sprintf (sprintbuf, catgets (dtsearch_catd, MS_misc, 8,
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"%s No valid databases remain."), PROGNAME "265");
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DtSearchAddMessage (sprintbuf);
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return FALSE;
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}
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allnames = austext_malloc (totlen + 512, PROGNAME "66", NULL);
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/* ---- PASS #2 ------------------------------------------
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* Build string of accumulated path and database names.
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*/
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targptr = allnames;
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for (db = *dblist; db != NULL; db = db->link) {
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srcptr = db->path;
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while (*srcptr != 0)
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*targptr++ = *srcptr++;
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srcptr = db->name;
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while (*srcptr != 0)
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*targptr++ = *srcptr++;
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*targptr++ = ';';
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}
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*(--targptr) = 0; /* terminate string */
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if (debugging)
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fprintf (aa_stderr,
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PROGNAME "150 vista opening databases '%s'\n", allnames);
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d_open (allnames, "o"); /* replaces OPEN() call from dmacros.h */
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if (db_status != S_OKAY) {
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targptr = austext_malloc (totlen + 128, PROGNAME"239", NULL);
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sprintf (targptr, catgets (dtsearch_catd, MS_vista, 378,
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"%s Could not open following database name string:\n '%s'"),
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PROGNAME"378", allnames);
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DtSearchAddMessage (targptr);
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DtSearchAddMessage (vista_msg (PROGNAME"379"));
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free (allnames);
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free (targptr);
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return FALSE;
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}
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else if (debugging)
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fprintf (aa_stderr, " --> vista open successful!\n");
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/* From here on, emergency exits MUST close the databases */
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austext_exit_dbms = (void (*) (int)) d_close;
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free (allnames);
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return TRUE;
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} /* open_dblk() */
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/*********************** OPENDBLK.C ************************/
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