4.4BSD/usr/src/usr.sbin/config.new/files.c
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratories.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)files.c 8.1 (Berkeley) 6/6/93
*/
#include <sys/param.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
extern const char *yyfile;
/*
* We check that each full path name is unique. File base names
* should generally also be unique, e.g., having both a net/xx.c and
* a kern/xx.c (or, worse, a net/xx.c and a new/xx.c++) is probably
* wrong, but is permitted under some conditions.
*/
static struct hashtab *basetab; /* file base names */
static struct hashtab *pathtab; /* full path names */
static struct files **nextfile;
static struct files **unchecked;
void
initfiles()
{
basetab = ht_new();
pathtab = ht_new();
nextfile = &allfiles;
unchecked = &allfiles;
}
static void
showprev(pref, fi)
const char *pref;
register struct files *fi;
{
xerror(fi->fi_srcfile, fi->fi_srcline,
"%sfile %s ...", pref, fi->fi_path);
errors--;
}
void
addfile(path, opts, flags, rule)
const char *path;
struct nvlist *opts;
int flags;
const char *rule;
{
struct files *fi;
const char *base, *dotp, *tail;
size_t baselen;
int needc, needf;
char buf[200];
/* check various errors */
needc = flags & FI_NEEDSCOUNT;
needf = flags & FI_NEEDSFLAG;
if (needc && needf) {
error("cannot mix needs-count and needs-flag");
goto bad;
}
if (opts == NULL && (needc || needf)) {
error("nothing to %s for %s", needc ? "count" : "flag", path);
goto bad;
}
if ((fi = ht_lookup(pathtab, path)) != NULL) {
showprev("", fi);
error("file %s listed again", path);
goto bad;
}
/* find last part of pathname, and same without trailing suffix */
tail = rindex(path, '/');
if (tail == NULL)
tail = path;
else
tail++;
dotp = rindex(tail, '.');
if (dotp == NULL || dotp[1] == 0 ||
(baselen = dotp - tail) >= sizeof(buf)) {
error("invalid pathname `%s'", path);
goto bad;
}
/*
* Make a copy of the path without the .c/.s/whatever suffix.
* This must be unique per "files" file (e.g., a specific
* file can override a standard file, but no standard file
* can override another standard file). This is not perfect
* but should catch any major errors.
*/
bcopy(tail, buf, baselen);
buf[baselen] = 0;
base = intern(buf);
if ((fi = ht_lookup(basetab, base)) != NULL) {
if (fi->fi_srcfile != yyfile) {
showprev("note: ", fi);
error("is overriden by %s", path);
errors--; /* take it away */
fi->fi_flags |= FI_HIDDEN;
} else {
showprev("", fi);
error("collides with %s (both make %s.o)",
path, base);
goto bad;
}
}
/*
* Commit this file to memory.
*/
fi = emalloc(sizeof *fi);
fi->fi_next = NULL;
fi->fi_srcfile = yyfile;
fi->fi_srcline = currentline();
fi->fi_flags = flags;
fi->fi_lastc = dotp[strlen(dotp) - 1];
fi->fi_path = path;
fi->fi_tail = tail;
fi->fi_base = base;
fi->fi_opt = opts;
fi->fi_mkrule = rule;
if (ht_insert(pathtab, path, fi))
panic("addfile: ht_insert(%s)", path);
(void)ht_replace(basetab, base, fi);
*nextfile = fi;
nextfile = &fi->fi_next;
return;
bad:
nvfreel(opts);
}
/*
* We have finished reading some "files" file, either ../../conf/files
* or ./files.$machine. Make sure that everything that is flagged as
* needing a count is reasonable. (This prevents ../../conf/files from
* depending on some machine-specific device.)
*/
void
checkfiles()
{
register struct files *fi, *last;
register struct nvlist *nv;
last = NULL;
for (fi = *unchecked; fi != NULL; last = fi, fi = fi->fi_next) {
if ((fi->fi_flags & FI_NEEDSCOUNT) == 0)
continue;
for (nv = fi->fi_opt; nv != NULL; nv = nv->nv_next)
if (ht_lookup(devbasetab, nv->nv_name) == NULL) {
xerror(fi->fi_srcfile, fi->fi_srcline,
"`%s' is not a countable device",
nv->nv_name);
/* keep fixfiles() from complaining again */
fi->fi_flags |= FI_HIDDEN;
}
}
if (last != NULL)
unchecked = &last->fi_next;
}
/*
* We have finished reading everything. Tack the files down: calculate
* selection and counts as needed.
*/
int
fixfiles()
{
register struct files *fi;
register struct nvlist *nv;
register struct devbase *dev;
int sel, err;
err = 0;
for (fi = allfiles; fi != NULL; fi = fi->fi_next) {
if (fi->fi_flags & FI_HIDDEN)
continue;
if ((nv = fi->fi_opt) == NULL) { /* standard */
fi->fi_flags |= FI_SEL;
continue;
}
/* figure out whether it is selected */
sel = 0;
if (fi->fi_flags & FI_NEEDSCOUNT) {
/* ... and compute counts too */
do {
dev = ht_lookup(devbasetab, nv->nv_name);
if (dev == NULL) {
xerror(fi->fi_srcfile, fi->fi_srcline,
"`%s' is not a countable device",
nv->nv_name);
err = 1;
} else {
if (dev->d_umax)
sel = 1;
nv->nv_int = dev->d_umax;
(void)ht_insert(needcnttab,
nv->nv_name, nv);
}
} while ((nv = nv->nv_next) != NULL);
} else {
do {
if (ht_lookup(selecttab, nv->nv_name)) {
sel = 1;
break;
}
} while ((nv = nv->nv_next) != NULL);
if (fi->fi_flags & FI_NEEDSFLAG)
for (nv = fi->fi_opt; nv; nv = nv->nv_next)
nv->nv_int = sel;
}
/* if selected, we are go */
if (sel)
fi->fi_flags |= FI_SEL;
}
return (err);
}