251 lines
6.2 KiB
C
251 lines
6.2 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1992, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)cap_mkdb.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <db.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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void db_build __P((char **));
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void dounlink __P((void));
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void usage __P((void));
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DB *capdbp;
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int verbose;
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char *capdb, *capname, buf[8 * 1024];
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/*
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* Mkcapdb creates a capability hash database for quick retrieval of capability
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* records. The database contains 2 types of entries: records and references
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* marked by the first byte in the data. A record entry contains the actual
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* capability record whereas a reference contains the name (key) under which
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* the correct record is stored.
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*/
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int c;
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capname = NULL;
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while ((c = getopt(argc, argv, "f:v")) != -1) {
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switch(c) {
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case 'f':
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capname = optarg;
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break;
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case 'v':
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verbose = 1;
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break;
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case '?':
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (*argv == NULL)
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usage();
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/*
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* The database file is the first argument if no name is specified.
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* Make arrangements to unlink it if exit badly.
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*/
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(void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv);
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if ((capname = strdup(buf)) == NULL)
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err(1, "");
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if ((capdbp = dbopen(capname,
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O_CREAT | O_TRUNC | O_RDWR, DEFFILEMODE, DB_HASH, NULL)) == NULL)
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err(1, "%s", buf);
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if (atexit(dounlink))
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err(1, "atexit");
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db_build(argv);
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if (capdbp->close(capdbp) < 0)
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err(1, "%s", capname);
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capname = NULL;
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exit(0);
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}
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void
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dounlink()
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{
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if (capname != NULL)
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(void)unlink(capname);
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}
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/*
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* Any changes to these definitions should be made also in the getcap(3)
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* library routines.
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*/
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#define RECOK (char)0
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#define TCERR (char)1
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#define SHADOW (char)2
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/*
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* Db_build() builds the name and capabilty databases according to the
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* details above.
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*/
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void
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db_build(ifiles)
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char **ifiles;
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{
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DBT key, data;
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recno_t reccnt;
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size_t len, bplen;
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int st;
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char *bp, *p, *t;
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data.data = NULL;
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key.data = NULL;
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for (reccnt = 0, bplen = 0; (st = cgetnext(&bp, ifiles)) > 0;) {
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/*
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* Allocate enough memory to store record, terminating
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* NULL and one extra byte.
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*/
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len = strlen(bp);
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if (bplen <= len + 2) {
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bplen += MAX(256, len + 2);
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if ((data.data = realloc(data.data, bplen)) == NULL)
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err(1, "");
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}
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/* Find the end of the name field. */
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if ((p = strchr(bp, ':')) == NULL) {
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warnx("no name field: %.*s", MIN(len, 20), bp);
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continue;
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}
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/* First byte of stored record indicates status. */
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switch(st) {
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case 1:
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((char *)(data.data))[0] = RECOK;
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break;
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case 2:
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((char *)(data.data))[0] = TCERR;
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warnx("Record not tc expanded: %.*s", p - bp, bp);
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break;
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}
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/* Create the stored record. */
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memmove(&((u_char *)(data.data))[1], bp, len + 1);
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data.size = len + 2;
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/* Store the record under the name field. */
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key.data = bp;
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key.size = p - bp;
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switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE)) {
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case -1:
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err(1, "put");
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/* NOTREACHED */
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case 1:
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warnx("ignored duplicate: %.*s",
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key.size, (char *)key.data);
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continue;
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}
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++reccnt;
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/* If only one name, ignore the rest. */
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if ((p = strchr(bp, '|')) == NULL)
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continue;
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/* The rest of the names reference the entire name. */
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((char *)(data.data))[0] = SHADOW;
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memmove(&((u_char *)(data.data))[1], key.data, key.size);
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data.size = key.size + 1;
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/* Store references for other names. */
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for (p = t = bp;; ++p) {
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if (p > t && (*p == ':' || *p == '|')) {
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key.size = p - t;
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key.data = t;
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switch(capdbp->put(capdbp,
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&key, &data, R_NOOVERWRITE)) {
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case -1:
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err(1, "put");
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/* NOTREACHED */
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case 1:
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warnx("ignored duplicate: %.*s",
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key.size, (char *)key.data);
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}
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t = p + 1;
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}
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if (*p == ':')
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break;
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}
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}
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switch(st) {
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case -1:
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err(1, "file argument");
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/* NOTREACHED */
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case -2:
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errx(1, "potential reference loop detected");
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/* NOTREACHED */
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}
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if (verbose)
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(void)printf("cap_mkdb: %d capability records\n", reccnt);
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}
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void
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usage()
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{
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(void)fprintf(stderr,
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"usage: cap_mkdb [-v] [-f outfile] file1 [file2 ...]\n");
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exit(1);
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}
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