NetBSD/usr.sbin/sendmail/makemap/makemap.c

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/* $NetBSD: makemap.c,v 1.13 1998/01/09 08:10:46 perry Exp $ */
/*
* Copyright (c) 1992 Eric P. Allman.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*/
#ifndef lint
static char sccsid[] = "@(#)makemap.c 8.38 (Berkeley) 9/23/97";
#endif /* not lint */
#include <sys/types.h>
#include <sys/errno.h>
#ifndef ISC_UNIX
# include <sys/file.h>
#endif
#include "sendmail.h"
#ifdef NDBM
#include <ndbm.h>
#endif
#ifdef NEWDB
#include <db.h>
#endif
enum type { T_DBM, T_BTREE, T_HASH, T_ERR, T_UNKNOWN };
union dbent
{
#ifdef NDBM
datum dbm;
#endif
#ifdef NEWDB
DBT db;
#endif
struct
{
char *data;
size_t size;
} xx;
};
uid_t RealUid;
gid_t RealGid;
char *RealUserName;
uid_t RunAsUid;
uid_t RunAsGid;
char *RunAsUserName;
int Verbose = 2;
bool DontInitGroups = TRUE;
bool UnsafeGroupWrites = FALSE;
u_char tTdvect[100];
#define BUFSIZE 1024
main(argc, argv)
int argc;
char **argv;
{
char *progname;
bool inclnull = FALSE;
bool notrunc = FALSE;
bool allowreplace = FALSE;
bool allowdups = FALSE;
bool verbose = FALSE;
bool foldcase = TRUE;
bool ignoresafeties = FALSE;
int exitstat;
int opt;
char *typename;
char *mapname;
char *ext;
int lineno;
int st;
int mode;
int putflags;
long dbcachesize = 1024 * 1024;
enum type type;
int fd;
union
{
#ifdef NDBM
DBM *dbm;
#endif
#ifdef NEWDB
DB *db;
#endif
void *dbx;
} dbp;
union dbent key, val;
#ifdef NEWDB
BTREEINFO bti;
HASHINFO hinfo;
#endif
char ibuf[BUFSIZE];
char fbuf[MAXNAME];
char dbuf[MAXNAME];
char pbuf[MAXNAME];
static char rnamebuf[MAXNAME]; /* holds RealUserName */
struct passwd *pw;
int sff = SFF_ROOTOK|SFF_REGONLY|SFF_NOLINK|SFF_NOWLINK;
struct stat std, stp;
extern char *optarg;
extern int optind;
extern bool lockfile();
progname = argv[0];
RunAsUid = RealUid = getuid();
RunAsGid = RealGid = getgid();
pw = getpwuid(RealUid);
if (pw != NULL)
{
if (strlen(pw->pw_name) > MAXNAME - 1)
pw->pw_name[MAXNAME] = 0;
sprintf(rnamebuf, "%s", pw->pw_name);
}
else
sprintf(rnamebuf, "Unknown UID %d", RealUid);
RunAsUserName = RealUserName = rnamebuf;
#if _FFR_NEW_MAKEMAP_FLAGS
#define OPTIONS "Nc:dforsv"
#else
#define OPTIONS "Ndforv"
#endif
while ((opt = getopt(argc, argv, OPTIONS)) != -1)
{
switch (opt)
{
case 'N':
inclnull = TRUE;
break;
#if _FFR_NEW_MAKEMAP_FLAGS
case 'c':
dbcachesize = atol(optarg);
break;
#endif
case 'd':
allowdups = TRUE;
break;
case 'f':
foldcase = FALSE;
break;
case 'o':
notrunc = TRUE;
break;
case 'r':
allowreplace = TRUE;
break;
#if _FFR_NEW_MAKEMAP_FLAGS
case 's':
ignoresafeties = TRUE;
break;
#endif
case 'v':
verbose = TRUE;
break;
default:
type = T_ERR;
break;
}
}
argc -= optind;
argv += optind;
if (argc != 2)
type = T_ERR;
else
{
typename = argv[0];
mapname = argv[1];
ext = NULL;
if (strcmp(typename, "dbm") == 0)
{
type = T_DBM;
}
else if (strcmp(typename, "btree") == 0)
{
type = T_BTREE;
ext = ".db";
}
else if (strcmp(typename, "hash") == 0)
{
type = T_HASH;
ext = ".db";
}
else
type = T_UNKNOWN;
}
switch (type)
{
case T_ERR:
#if _FFR_NEW_MAKEMAP_FLAGS
fprintf(stderr,
"Usage: %s [-N] [-c cachesize] [-d] [-f] [-o] [-r] [-s] [-v] type mapname\n",
progname);
#else
fprintf(stderr, "Usage: %s [-N] [-d] [-f] [-o] [-r] [-v] type mapname\n", progname);
#endif
exit(EX_USAGE);
case T_UNKNOWN:
fprintf(stderr, "%s: Unknown database type %s\n",
progname, typename);
exit(EX_USAGE);
#ifndef NDBM
case T_DBM:
#endif
#ifndef NEWDB
case T_BTREE:
case T_HASH:
#endif
fprintf(stderr, "%s: Type %s not supported in this version\n",
progname, typename);
exit(EX_UNAVAILABLE);
#ifdef NEWDB
case T_BTREE:
bzero(&bti, sizeof bti);
if (allowdups)
bti.flags |= R_DUP;
if (allowdups || allowreplace)
putflags = 0;
else
putflags = R_NOOVERWRITE;
break;
case T_HASH:
bzero(&hinfo, sizeof hinfo);
if (allowreplace)
putflags = 0;
else
putflags = R_NOOVERWRITE;
break;
#endif
#ifdef NDBM
case T_DBM:
if (allowdups)
{
fprintf(stderr, "%s: Type %s does not support -d (allow dups)\n",
progname, typename);
exit(EX_UNAVAILABLE);
}
if (allowreplace)
putflags = DBM_REPLACE;
else
putflags = DBM_INSERT;
break;
#endif
}
/*
** Adjust file names.
*/
if (ext != NULL)
{
int el, fl;
el = strlen(ext);
fl = strlen(mapname);
if (el + fl + 1 >= sizeof fbuf)
{
fprintf(stderr, "%s: file name too long", mapname);
exit(EX_USAGE);
}
if (fl < el || strcmp(&mapname[fl - el], ext) != 0)
{
strcpy(fbuf, mapname);
strcat(fbuf, ext);
mapname = fbuf;
}
}
if (!notrunc)
sff |= SFF_CREAT;
switch (type)
{
#ifdef NEWDB
case T_BTREE:
case T_HASH:
if (strlen(mapname) >= sizeof dbuf)
{
fprintf(stderr,
"%s: map name too long\n", mapname);
exit(EX_USAGE);
}
strcpy(dbuf, mapname);
if (!ignoresafeties &&
(st = safefile(dbuf, RealUid, RealGid, RealUserName,
sff, S_IWUSR, &std)) != 0)
{
fprintf(stderr,
"%s: could not create: %s\n",
dbuf, errstring(st));
exit(EX_CANTCREAT);
}
break;
#endif
#ifdef NDBM
case T_DBM:
if (strlen(mapname) + 5 > sizeof dbuf)
{
fprintf(stderr,
"%s: map name too long\n", mapname);
exit(EX_USAGE);
}
sprintf(dbuf, "%s.dir", mapname);
if ((st = safefile(dbuf, RealUid, RealGid, RealUserName,
sff, S_IWUSR, &std)) != 0 && !ignoresafeties)
{
fprintf(stderr,
"%s: could not create: %s\n",
dbuf, errstring(st));
exit(EX_CANTCREAT);
}
sprintf(pbuf, "%s.pag", mapname);
if ((st = safefile(pbuf, RealUid, RealGid, RealUserName,
sff, S_IWUSR, &stp)) != 0 && !ignoresafeties)
{
fprintf(stderr,
"%s: could not create: %s\n",
pbuf, errstring(st));
exit(EX_CANTCREAT);
}
break;
#endif
default:
fprintf(stderr,
"%s: internal error: type %d\n",
progname,
type);
exit(EX_SOFTWARE);
}
/*
** Create the database.
*/
mode = O_RDWR;
if (!notrunc)
mode |= O_CREAT|O_TRUNC;
#if O_EXLOCK
mode |= O_EXLOCK;
#else
/* pre-lock the database */
if (ignoresafeties)
fd = dfopen(dbuf, mode & ~O_TRUNC, 0644, sff);
else
fd = safeopen(dbuf, mode & ~O_TRUNC, 0644, sff);
if (fd < 0)
{
fprintf(stderr, "%s: cannot create type %s map %s\n",
progname, typename, mapname);
exit(EX_CANTCREAT);
}
#endif
switch (type)
{
#ifdef NDBM
case T_DBM:
dbp.dbm = dbm_open(mapname, mode, 0644);
if (dbp.dbm != NULL &&
dbm_dirfno(dbp.dbm) == dbm_pagfno(dbp.dbm))
{
fprintf(stderr, "dbm map %s: cannot run with GDBM\n",
mapname);
dbm_close(dbp.dbm);
exit(EX_CONFIG);
}
if (!ignoresafeties && dbp.dbm != NULL &&
(filechanged(dbuf, dbm_dirfno(dbp.dbm), &std, sff) ||
filechanged(pbuf, dbm_pagfno(dbp.dbm), &stp, sff)))
{
fprintf(stderr,
"dbm map %s: file changed after open\n",
mapname);
dbm_close(dbp.dbm);
exit(EX_CANTCREAT);
}
break;
#endif
#ifdef NEWDB
case T_HASH:
/* tweak some parameters for performance */
hinfo.nelem = 4096;
hinfo.cachesize = dbcachesize;
dbp.db = dbopen(mapname, mode, 0644, DB_HASH, &hinfo);
if (dbp.db != NULL)
{
if (!ignoresafeties &&
filechanged(dbuf, dbp.db->fd(dbp.db), &std, sff))
{
fprintf(stderr,
"db map %s: file changed after open\n",
mapname);
dbp.db->close(dbp.db);
exit(EX_CANTCREAT);
}
# if OLD_NEWDB
(void) (*dbp.db->sync)(dbp.db);
# else
(void) (*dbp.db->sync)(dbp.db, 0);
# endif
}
break;
case T_BTREE:
/* tweak some parameters for performance */
bti.cachesize = dbcachesize;
dbp.db = dbopen(mapname, mode, 0644, DB_BTREE, &bti);
if (dbp.db != NULL)
{
if (!ignoresafeties &&
filechanged(dbuf, dbp.db->fd(dbp.db), &std, sff))
{
fprintf(stderr,
"db map %s: file changed after open\n",
mapname);
dbp.db->close(dbp.db);
exit(EX_CANTCREAT);
}
# if OLD_NEWDB
(void) (*dbp.db->sync)(dbp.db);
# else
(void) (*dbp.db->sync)(dbp.db, 0);
# endif
}
break;
#endif
default:
fprintf(stderr, "%s: internal error: type %d\n",
progname, type);
exit(EX_SOFTWARE);
}
if (dbp.dbx == NULL)
{
fprintf(stderr, "%s: cannot open type %s map %s\n",
progname, typename, mapname);
exit(EX_CANTCREAT);
}
/*
** Copy the data
*/
lineno = 0;
exitstat = EX_OK;
while (fgets(ibuf, sizeof ibuf, stdin) != NULL)
{
register char *p;
lineno++;
/*
** Parse the line.
*/
p = strchr(ibuf, '\n');
if (p != NULL)
*p = '\0';
else if (!feof(stdin))
{
fprintf(stderr, "%s: %s: line %d: line too long (%d bytes max)\n",
progname, mapname, lineno, sizeof ibuf);
continue;
}
if (ibuf[0] == '\0' || ibuf[0] == '#')
continue;
if (isspace(ibuf[0]))
{
fprintf(stderr, "%s: %s: line %d: syntax error (leading space)\n",
progname, mapname, lineno);
continue;
}
key.xx.data = ibuf;
for (p = ibuf; *p != '\0' && !isspace(*p); p++)
{
if (foldcase && isupper(*p))
*p = tolower(*p);
}
key.xx.size = p - key.xx.data;
if (inclnull)
key.xx.size++;
if (*p != '\0')
*p++ = '\0';
while (isspace(*p))
p++;
if (*p == '\0')
{
fprintf(stderr, "%s: %s: line %d: no RHS for LHS %s\n",
progname, mapname, lineno, key.xx.data);
continue;
}
val.xx.data = p;
val.xx.size = strlen(p);
if (inclnull)
val.xx.size++;
/*
** Do the database insert.
*/
if (verbose)
{
printf("key=`%s', val=`%s'\n", key.xx.data, val.xx.data);
}
switch (type)
{
#ifdef NDBM
case T_DBM:
st = dbm_store(dbp.dbm, key.dbm, val.dbm, putflags);
break;
#endif
#ifdef NEWDB
case T_BTREE:
case T_HASH:
st = (*dbp.db->put)(dbp.db, &key.db, &val.db, putflags);
break;
#endif
}
if (st < 0)
{
fprintf(stderr, "%s: %s: line %d: key %s: put error\n",
progname, mapname, lineno, key.xx.data);
perror(mapname);
exitstat = EX_IOERR;
}
else if (st > 0)
{
fprintf(stderr,
"%s: %s: line %d: key %s: duplicate key\n",
progname, mapname, lineno, key.xx.data);
}
}
/*
** Now close the database.
*/
switch (type)
{
#ifdef NDBM
case T_DBM:
dbm_close(dbp.dbm);
break;
#endif
#ifdef NEWDB
case T_HASH:
case T_BTREE:
if ((*dbp.db->close)(dbp.db) < 0)
{
fprintf(stderr, "%s: %s: error on close\n",
progname, mapname);
perror(mapname);
exitstat = EX_IOERR;
}
#endif
}
#if !O_EXLOCK
/* release locks */
close(fd);
#endif
exit (exitstat);
}
/*
** LOCKFILE -- lock a file using flock or (shudder) fcntl locking
**
** Parameters:
** fd -- the file descriptor of the file.
** filename -- the file name (for error messages).
** ext -- the filename extension.
** type -- type of the lock. Bits can be:
** LOCK_EX -- exclusive lock.
** LOCK_NB -- non-blocking.
**
** Returns:
** TRUE if the lock was acquired.
** FALSE otherwise.
*/
bool
lockfile(fd, filename, ext, type)
int fd;
char *filename;
char *ext;
int type;
{
# if !HASFLOCK
int action;
struct flock lfd;
extern int errno;
bzero(&lfd, sizeof lfd);
if (bitset(LOCK_UN, type))
lfd.l_type = F_UNLCK;
else if (bitset(LOCK_EX, type))
lfd.l_type = F_WRLCK;
else
lfd.l_type = F_RDLCK;
if (bitset(LOCK_NB, type))
action = F_SETLK;
else
action = F_SETLKW;
if (fcntl(fd, action, &lfd) >= 0)
return TRUE;
/*
** On SunOS, if you are testing using -oQ/tmp/mqueue or
** -oA/tmp/aliases or anything like that, and /tmp is mounted
** as type "tmp" (that is, served from swap space), the
** previous fcntl will fail with "Invalid argument" errors.
** Since this is fairly common during testing, we will assume
** that this indicates that the lock is successfully grabbed.
*/
if (errno == EINVAL)
return TRUE;
# else /* HASFLOCK */
if (flock(fd, type) >= 0)
return TRUE;
# endif
return FALSE;
}
/*VARARGS2*/
void
#ifdef __STDC__
message(const char *msg, ...)
#else
message(msg, va_alist)
const char *msg;
va_dcl
#endif
{
const char *m;
VA_LOCAL_DECL
m = msg;
if (isdigit(m[0]) && isdigit(m[1]) && isdigit(m[2]) && m[3] == ' ')
m += 4;
VA_START(msg);
vfprintf(stderr, m, ap);
VA_END;
fprintf(stderr, "\n");
}
/*VARARGS2*/
void
#ifdef __STDC__
syserr(const char *msg, ...)
#else
syserr(msg, va_alist)
const char *msg;
va_dcl
#endif
{
const char *m;
VA_LOCAL_DECL
m = msg;
if (isdigit(m[0]) && isdigit(m[1]) && isdigit(m[2]) && m[3] == ' ')
m += 4;
VA_START(msg);
vfprintf(stderr, m, ap);
VA_END;
fprintf(stderr, "\n");
}
const char *
errstring(err)
int err;
{
static char errstr[64];
#if !HASSTRERROR && !defined(ERRLIST_PREDEFINED)
extern char *sys_errlist[];
extern int sys_nerr;
#endif
/* handle pseudo-errors internal to sendmail */
switch (err)
{
case E_SM_OPENTIMEOUT:
return "Timeout on file open";
case E_SM_NOSLINK:
return "Symbolic links not allowed";
case E_SM_NOHLINK:
return "Hard links not allowed";
case E_SM_REGONLY:
return "Regular files only";
case E_SM_ISEXEC:
return "Executable files not allowed";
case E_SM_WWDIR:
return "World writable directory";
case E_SM_GWDIR:
return "Group writable directory";
case E_SM_FILECHANGE:
return "File changed after open";
case E_SM_WWFILE:
return "World writable file";
case E_SM_GWFILE:
return "Group writable file";
}
#if HASSTRERROR
return strerror(err);
#else
if (err < 0 || err > sys_nerr)
{
sprintf(errstr, "Error %d", err);
return errstr;
}
return sys_errlist[err];
#endif
}