freebsd-dev/contrib/amd/mk-amd-map/mk-amd-map.c
2007-12-05 16:57:05 +00:00

400 lines
9.9 KiB
C

/*
* Copyright (c) 1997-2006 Erez Zadok
* Copyright (c) 1990 Jan-Simon Pendry
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* 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 acknowledgment:
* 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.
*
*
* File: am-utils/mk-amd-map/mk-amd-map.c
*/
/*
* Convert a file map into an ndbm map
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
/* (libdb version 2) uses .db extensions but an old dbm API */
/* check for libgdbm to distinguish it from linux systems */
#if defined(DBM_SUFFIX) && !defined(HAVE_LIBGDBM)
# define HAVE_DB_SUFFIX
#endif /* not defined(DBM_SUFFIX) && !defined(HAVE_LIBGDBM) */
#ifdef HAVE_MAP_NDBM
static int
store_data(voidp db, char *k, char *v)
{
datum key, val;
key.dptr = k;
val.dptr = v;
key.dsize = strlen(k) + 1;
val.dsize = strlen(v) + 1;
return dbm_store((DBM *) db, key, val, DBM_INSERT);
}
/*
* Read one line from file.
*/
static int
read_line(char *buf, int size, FILE *fp)
{
int done = 0;
do {
while (fgets(buf, size, fp)) {
int len = strlen(buf);
done += len;
if (len > 1 && buf[len - 2] == '\\' && buf[len - 1] == '\n') {
int ch;
buf += len - 2;
size -= len - 2;
*buf = '\n';
buf[1] = '\0';
/*
* Skip leading white space on next line
*/
while ((ch = getc(fp)) != EOF && isascii(ch) && isspace(ch)) ;
(void) ungetc(ch, fp);
} else {
return done;
}
}
} while (size > 0 && !feof(fp));
return done;
}
/*
* Read through a map.
*/
static int
read_file(FILE *fp, char *map, voidp db)
{
char key_val[2048];
int chuck = 0;
int line_no = 0;
int errs = 0;
while (read_line(key_val, 2048, fp)) {
char *kp;
char *cp;
char *hash;
int len = strlen(key_val);
line_no++;
/*
* Make sure we got the whole line
*/
if (key_val[len - 1] != '\n') {
fprintf(stderr, "line %d in \"%s\" is too long", line_no, map);
chuck = 1;
} else {
key_val[len - 1] = '\0';
}
/*
* Strip comments
*/
hash = strchr(key_val, '#');
if (hash)
*hash = '\0';
/*
* Find start of key
*/
for (kp = key_val; *kp && isascii(*kp) && isspace((int)*kp); kp++) ;
/*
* Ignore blank lines
*/
if (!*kp)
goto again;
/*
* Find end of key
*/
for (cp = kp; *cp && (!isascii(*cp) || !isspace((int)*cp)); cp++) ;
/*
* Check whether key matches, or whether
* the entry is a wildcard entry.
*/
if (*cp)
*cp++ = '\0';
while (*cp && isascii(*cp) && isspace((int)*cp))
cp++;
if (*kp == '+') {
fprintf(stderr, "Can't interpolate %s\n", kp);
errs++;
} else if (*cp) {
if (db) {
if (store_data(db, kp, cp) < 0) {
fprintf(stderr, "Could store %s -> %s\n", kp, cp);
errs++;
}
} else {
printf("%s\t%s\n", kp, cp);
}
} else {
fprintf(stderr, "%s: line %d has no value field", map, line_no);
errs++;
}
again:
/*
* If the last read didn't get a whole line then
* throw away the remainder before continuing...
*/
if (chuck) {
while (fgets(key_val, sizeof(key_val), fp) &&
!strchr(key_val, '\n')) ;
chuck = 0;
}
}
return errs;
}
static int
remove_file(char *f)
{
if (unlink(f) < 0 && errno != ENOENT)
return -1;
return 0;
}
int
main(int argc, char *argv[])
{
FILE *mapf; /* the input file to read from */
int error;
char *mapsrc;
DBM *db = NULL;
static char maptmp[] = "dbmXXXXXX";
#ifdef HAVE_DB_SUFFIX
char maptdb[16];
char *map_name_db = (char *) NULL;
#else /* not HAVE_DB_SUFFIX */
char maptpag[16], maptdir[16];
char *map_name_pag = (char *) NULL, *map_name_dir = (char *) NULL;
#endif /* not HAVE_DB_SUFFIX */
size_t l = 0;
char *sl;
int printit = 0;
int usage = 0;
int ch;
extern int optind;
/* test options */
while ((ch = getopt(argc, argv, "p")) != -1)
switch (ch) {
case 'p':
printit = 1;
break;
default:
usage++;
break;
}
if (usage || optind != (argc - 1)) {
fputs("Usage: mk-amd-map [-p] file-map\n", stderr);
exit(1);
}
mapsrc = argv[optind];
/* test if can get to the map directory */
sl = strrchr(mapsrc, '/');
if (sl) {
*sl = '\0';
if (chdir(mapsrc) < 0) {
fputs("Can't chdir to ", stderr);
perror(mapsrc);
exit(1);
}
mapsrc = sl + 1;
}
/* open source file */
mapf = fopen(mapsrc, "r");
if (!mapf) {
fprintf(stderr, "cannot open source file ");
perror(mapsrc);
exit(1);
}
#ifndef DEBUG
signal(SIGINT, SIG_IGN);
#endif /* DEBUG */
if (!printit) {
/* enough space for ".db" or ".pag" or ".dir" appended */
l = strlen(mapsrc) + 5;
#ifdef HAVE_DB_SUFFIX
map_name_db = (char *) malloc(l);
error = (map_name_db == NULL);
#else /* not HAVE_DB_SUFFIX */
map_name_pag = (char *) malloc(l);
map_name_dir = (char *) malloc(l);
error = (map_name_pag == NULL || map_name_dir == NULL);
#endif /* not HAVE_DB_SUFFIX */
if (error) {
perror("mk-amd-map: malloc");
exit(1);
}
#ifdef HAVE_MKSTEMP
{
/*
* XXX: hack to avoid compiler complaints about mktemp not being
* secure, since we have to do a dbm_open on this anyway. So use
* mkstemp if you can, and then close the fd, but we get a safe
* and unique file name.
*/
int dummyfd;
dummyfd = mkstemp(maptmp);
if (dummyfd >= 0)
close(dummyfd);
}
#else /* not HAVE_MKSTEMP */
mktemp(maptmp);
#endif /* not HAVE_MKSTEMP */
/* remove existing temps (if any) */
#ifdef HAVE_DB_SUFFIX
xsnprintf(maptdb, sizeof(maptdb), "%s.db", maptmp);
if (remove_file(maptdb) < 0) {
fprintf(stderr, "Can't remove existing temporary file; ");
perror(maptdb);
exit(1);
}
#else /* not HAVE_DB_SUFFIX */
xsnprintf(maptpag, sizeof(maptpag), "%s.pag", maptmp);
xsnprintf(maptdir, sizeof(maptdir), "%s.dir", maptmp);
if (remove_file(maptpag) < 0 || remove_file(maptdir) < 0) {
fprintf(stderr, "Can't remove existing temporary files; %s and ", maptpag);
perror(maptdir);
exit(1);
}
#endif /* not HAVE_DB_SUFFIX */
db = dbm_open(maptmp, O_RDWR|O_CREAT|O_EXCL, 0444);
if (!db) {
fprintf(stderr, "cannot initialize temporary database: %s", maptmp);
exit(1);
}
}
/* print db to stdout or to temp database */
error = read_file(mapf, mapsrc, db);
fclose(mapf);
if (error) {
if (printit)
fprintf(stderr, "Error reading source file %s\n", mapsrc);
else
fprintf(stderr, "Error creating database map for %s\n", mapsrc);
exit(1);
}
if (printit)
exit(0); /* nothing more to do */
/* if gets here, we wrote to a database */
dbm_close(db);
/* all went well */
#ifdef HAVE_DB_SUFFIX
/* sizeof(map_name_db) is malloc'ed above */
xsnprintf(map_name_db, l, "%s.db", mapsrc);
if (rename(maptdb, map_name_db) < 0) {
fprintf(stderr, "Couldn't rename %s to ", maptdb);
perror(map_name_db);
/* Throw away the temporary map */
unlink(maptdb);
exit(1);
}
#else /* not HAVE_DB_SUFFIX */
/* sizeof(map_name_{pag,dir}) are malloc'ed above */
xsnprintf(map_name_pag, l, "%s.pag", mapsrc);
xsnprintf(map_name_dir, l, "%s.dir", mapsrc);
if (rename(maptpag, map_name_pag) < 0) {
fprintf(stderr, "Couldn't rename %s to ", maptpag);
perror(map_name_pag);
/* Throw away the temporary map */
unlink(maptpag);
unlink(maptdir);
exit(1);
}
if (rename(maptdir, map_name_dir) < 0) {
fprintf(stderr, "Couldn't rename %s to ", maptdir);
perror(map_name_dir);
/* remove the (presumably bad) .pag file */
unlink(map_name_pag);
/* throw away remaining part of original map */
unlink(map_name_dir);
/* throw away the temporary map */
unlink(maptdir);
fprintf(stderr, "WARNING: existing map \"%s.{dir,pag}\" destroyed\n",
mapsrc);
exit(1);
}
#endif /* not HAVE_DB_SUFFIX */
exit(0);
}
#else /* not HAVE_MAP_NDBM */
int
main()
{
fputs("mk-amd-map: This system does not support hashed database files\n", stderr);
exit(1);
}
#endif /* not HAVE_MAP_NDBM */