263 lines
7.3 KiB
C
263 lines
7.3 KiB
C
/*
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* Copyright (c) 1992 The Regents of the University of California.
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* All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* 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, Lawrence Berkeley Laboratories.
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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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* @(#)files.c 5.2 (Berkeley) 4/18/93
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*/
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#include <sys/param.h>
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#include <errno.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 "config.h"
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extern const char *yyfile;
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/*
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* We check that each full path name is unique. File base names
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* should generally also be unique, e.g., having both a net/xx.c and
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* a kern/xx.c (or, worse, a net/xx.c and a new/xx.c++) is probably
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* wrong, but is permitted under some conditions.
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*/
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static struct hashtab *basetab; /* file base names */
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static struct hashtab *pathtab; /* full path names */
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static struct files **nextfile;
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static struct files **unchecked;
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void
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initfiles()
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{
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basetab = ht_new();
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pathtab = ht_new();
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nextfile = &allfiles;
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unchecked = &allfiles;
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}
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static void
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showprev(pref, fi)
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const char *pref;
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register struct files *fi;
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{
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xerror(fi->fi_srcfile, fi->fi_srcline,
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"%sfile %s ...", pref, fi->fi_path);
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errors--;
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}
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void
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addfile(path, opts, flags, rule)
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const char *path;
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struct nvlist *opts;
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int flags;
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const char *rule;
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{
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struct files *fi;
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const char *base, *dotp, *tail;
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size_t baselen;
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int needc, needf;
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char buf[200];
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/* check various errors */
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needc = flags & FI_NEEDSCOUNT;
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needf = flags & FI_NEEDSFLAG;
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if (needc && needf) {
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error("cannot mix needs-count and needs-flag");
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goto bad;
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}
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if (opts == NULL && (needc || needf)) {
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error("nothing to %s for %s", needc ? "count" : "flag", path);
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goto bad;
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}
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if ((fi = ht_lookup(pathtab, path)) != NULL) {
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showprev("", fi);
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error("file %s listed again", path);
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goto bad;
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}
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/* find last part of pathname, and same without trailing suffix */
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tail = rindex(path, '/');
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if (tail == NULL)
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tail = path;
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else
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tail++;
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dotp = rindex(tail, '.');
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if (dotp == NULL || dotp[1] == 0 ||
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(baselen = dotp - tail) >= sizeof(buf)) {
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error("invalid pathname `%s'", path);
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goto bad;
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}
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/*
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* Make a copy of the path without the .c/.s/whatever suffix.
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* This must be unique per "files" file (e.g., a specific
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* file can override a standard file, but no standard file
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* can override another standard file). This is not perfect
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* but should catch any major errors.
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*/
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bcopy(tail, buf, baselen);
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buf[baselen] = 0;
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base = intern(buf);
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if ((fi = ht_lookup(basetab, base)) != NULL) {
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if (fi->fi_srcfile != yyfile) {
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showprev("note: ", fi);
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error("is overriden by %s", path);
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errors--; /* take it away */
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fi->fi_flags |= FI_HIDDEN;
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} else {
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showprev("", fi);
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error("collides with %s (both make %s.o)",
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path, base);
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goto bad;
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}
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}
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/*
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* Commit this file to memory.
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*/
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fi = emalloc(sizeof *fi);
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fi->fi_next = NULL;
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fi->fi_srcfile = yyfile;
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fi->fi_srcline = currentline();
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fi->fi_flags = flags;
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fi->fi_lastc = dotp[strlen(dotp) - 1];
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fi->fi_path = path;
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fi->fi_tail = tail;
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fi->fi_base = base;
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fi->fi_opt = opts;
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fi->fi_mkrule = rule;
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if (ht_insert(pathtab, path, fi))
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panic("addfile: ht_insert(%s)", path);
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(void)ht_replace(basetab, base, fi);
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*nextfile = fi;
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nextfile = &fi->fi_next;
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return;
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bad:
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nvfreel(opts);
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}
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/*
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* We have finished reading some "files" file, either ../../conf/files
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* or ./files.$machine. Make sure that everything that is flagged as
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* needing a count is reasonable. (This prevents ../../conf/files from
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* depending on some machine-specific device.)
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*/
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void
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checkfiles()
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{
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register struct files *fi, *last;
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register struct nvlist *nv;
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last = NULL;
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for (fi = *unchecked; fi != NULL; last = fi, fi = fi->fi_next) {
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if ((fi->fi_flags & FI_NEEDSCOUNT) == 0)
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continue;
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for (nv = fi->fi_opt; nv != NULL; nv = nv->nv_next)
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if (ht_lookup(devbasetab, nv->nv_name) == NULL) {
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xerror(fi->fi_srcfile, fi->fi_srcline,
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"`%s' is not a countable device",
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nv->nv_name);
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/* keep fixfiles() from complaining again */
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fi->fi_flags |= FI_HIDDEN;
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}
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}
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if (last != NULL)
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unchecked = &last->fi_next;
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}
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/*
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* We have finished reading everything. Tack the files down: calculate
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* selection and counts as needed.
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*/
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int
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fixfiles()
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{
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register struct files *fi;
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register struct nvlist *nv;
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register struct devbase *dev;
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int sel, err;
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err = 0;
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for (fi = allfiles; fi != NULL; fi = fi->fi_next) {
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if (fi->fi_flags & FI_HIDDEN)
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continue;
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if ((nv = fi->fi_opt) == NULL) { /* standard */
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fi->fi_flags |= FI_SEL;
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continue;
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}
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/* figure out whether it is selected */
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sel = 0;
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if (fi->fi_flags & FI_NEEDSCOUNT) {
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/* ... and compute counts too */
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do {
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dev = ht_lookup(devbasetab, nv->nv_name);
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if (dev == NULL) {
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xerror(fi->fi_srcfile, fi->fi_srcline,
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"`%s' is not a countable device",
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nv->nv_name);
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err = 1;
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} else {
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if (dev->d_umax)
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sel = 1;
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nv->nv_int = dev->d_umax;
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(void)ht_insert(needcnttab,
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nv->nv_name, nv);
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}
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} while ((nv = nv->nv_next) != NULL);
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} else {
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do {
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if (ht_lookup(selecttab, nv->nv_name)) {
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sel = 1;
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break;
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}
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} while ((nv = nv->nv_next) != NULL);
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if (fi->fi_flags & FI_NEEDSFLAG)
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for (nv = fi->fi_opt; nv; nv = nv->nv_next)
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nv->nv_int = sel;
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}
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/* if selected, we are go */
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if (sel)
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fi->fi_flags |= FI_SEL;
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}
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return (err);
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}
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