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Usenet 1994 October
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usenetsourcesnewsgroupsinfomagicoctober1994disk2.iso
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unix
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volume21
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amd
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part05
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mk-amd-map.c
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C/C++ Source or Header
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1990-04-10
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7KB
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310 lines
/*
* $Id: mk-amd-map.c,v 5.1.1.2 90/01/11 17:09:31 jsp Exp Locker: jsp $
*
* 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 are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by Imperial College of Science, Technology and Medicine, London, UK.
* The names of the College and University may not be used to endorse
* or promote products derived from this software without specific
* prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/*
* Convert a file map into an ndbm map
*/
#ifndef lint
char copyright[] = "\
@(#)Copyright (c) 1990 Jan-Simon Pendry\n\
@(#)Copyright (c) 1990 Imperial College of Science, Technology & Medicine\n\
@(#)Copyright (c) 1990 The Regents of the University of California.\n\
@(#)All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char rcsid[] = "$Id: mk-amd-map.c,v 5.1.1.2 90/01/11 17:09:31 jsp Exp Locker: jsp $";
static char sccsid[] = "%W% (Berkeley) %G%";
#endif /* not lint */
#include "am.h"
#ifdef OS_HAS_GDBM
#define HAS_DATABASE
#include "gdbm.h"
#endif
#ifndef HAS_DATABASE
#ifdef OS_HAS_NDBM
#define HAS_DATABASE
#define USE_NDBM
#include <ndbm.h>
#define create_database(name) dbm_open(name, O_RDWR|O_CREAT, 0444)
static int store_data(db, k, v)
voidp db;
char *k, *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);
}
#endif /* OS_HAS_NDBM */
#endif /* !OS_HAS_DATABASE */
#ifdef HAS_DATABASE
#include <fcntl.h>
#include <ctype.h>
static int read_line(buf, size, fp)
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;
/*
* 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(fp, map, db)
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, sizeof(key_val), 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(*kp); kp++)
;
/*
* Ignore blank lines
*/
if (!*kp)
goto again;
/*
* Find end of key
*/
for (cp = kp; *cp&&(!isascii(*cp)||!isspace(*cp)); cp++)
;
/*
* Check whether key matches, or whether
* the entry is a wildcard entry.
*/
if (*cp)
*cp++ = '\0';
while (*cp && isascii(*cp) && isspace(*cp))
cp++;
if (*kp == '+') {
fprintf(stderr, "Can't interpolate %s\n", kp);
errs++;
} else if (*cp) {
#ifdef DEBUG
printf("%s\t%s\n", kp, cp);
#endif
if (store_data(db, kp, cp) < 0) {
fprintf(stderr, "Could store %s -> %s\n", kp, cp);
errs++;
}
} 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(f)
char *f;
{
if (unlink(f) < 0 && errno != ENOENT)
return -1;
return 0;
}
main(argc, argv)
int argc;
char *argv[];
{
FILE *mapf;
char *map;
int rc = 0;
DBM *mapd;
char *maptmp = "dbmXXXXXX";
char maptpag[16], maptdir[16];
char *mappag, *mapdir;
int len;
char *sl;
if (argc != 2) {
fputs("Usage: mk-amd-map file-map\n", stderr);
exit(1);
}
map = argv[1];
sl = strrchr(map, '/');
if (sl) {
*sl = '\0';
if (chdir(map) < 0) {
fputs("Can't chdir to ", stderr);
perror(map);
exit(1);
}
map = sl + 1;
}
#ifdef USE_NDBM
len = strlen(map);
mappag = (char *) malloc(len + 5);
mapdir = (char *) malloc(len + 5);
if (!mappag || !mapdir) {
perror("malloc");
exit(1);
}
mktemp(maptmp);
sprintf(maptpag, "%s.pag", maptmp);
sprintf(maptdir, "%s.dir", maptmp);
if (remove(maptpag) < 0 || remove(maptdir) < 0) {
fprintf(stderr, "Can't remove existing temporary files; %s and", maptpag);
perror(maptdir);
exit(1);
}
#endif
mapf = fopen(map, "r");
if (mapf)
mapd = create_database(maptmp);
else
mapd = 0;
#ifndef DEBUG
signal(SIGINT, SIG_IGN);
#endif
if (mapd) {
int error = read_file(mapf, map, mapd);
(void) fclose(mapf);
if (error) {
fprintf(stderr, "Error creating ndbm map for %s\n", map);
rc = 1;
}
#ifdef USE_NDBM
sprintf(mappag, "%s.pag", map);
sprintf(mapdir, "%s.dir", map);
if (rename(maptpag, mappag) < 0) {
fprintf(stderr, "Couldn't rename %s to ", maptpag);
perror(mappag);
/* Throw away the temporary map */
unlink(maptpag);
unlink(maptdir);
rc = 1;
} else if (rename(maptdir, mapdir) < 0) {
fprintf(stderr, "Couldn't rename %s to ", maptdir);
perror(mapdir);
/* Put the .pag file back */
rename(mappag, maptpag);
/* Throw away remaining part of original map */
unlink(mapdir);
fprintf(stderr, "WARNING: existing map \"%s.{dir,pag}\" destroyed\n", map);
rc = 1;
}
#endif
} else {
#ifdef USE_NDBM
fprintf(stderr, "Can't open \"%s.{dir,pag}\" for ", map);
#endif
perror("writing");
rc = 1;
}
exit(rc);
}
#else
main()
{
fputs("This system does not support hashed database files\n", stderr);
exit(0);
}
#endif