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change bestmx map to not do resolver domain searching (RES_DNSRCH)
[unix-history] / usr / src / usr.sbin / sendmail / src / map.c
/*
* Copyright (c) 1992, 1995 Eric P. Allman.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* %sccs.include.redist.c%
*/
#ifndef lint
static char sccsid[] = "@(#)map.c 8.78 (Berkeley) %G%";
#endif /* not lint */
#include "sendmail.h"
#ifdef NDBM
# include <ndbm.h>
#endif
#ifdef NEWDB
# include <db.h>
#endif
#ifdef NIS
struct dom_binding; /* forward reference needed on IRIX */
# include <rpcsvc/ypclnt.h>
#endif
/*
** MAP.C -- implementations for various map classes.
**
** Each map class implements a series of functions:
**
** bool map_parse(MAP *map, char *args)
** Parse the arguments from the config file. Return TRUE
** if they were ok, FALSE otherwise. Fill in map with the
** values.
**
** char *map_lookup(MAP *map, char *key, char **args, int *pstat)
** Look up the key in the given map. If found, do any
** rewriting the map wants (including "args" if desired)
** and return the value. Set *pstat to the appropriate status
** on error and return NULL. Args will be NULL if called
** from the alias routines, although this should probably
** not be relied upon. It is suggested you call map_rewrite
** to return the results -- it takes care of null termination
** and uses a dynamically expanded buffer as needed.
**
** void map_store(MAP *map, char *key, char *value)
** Store the key:value pair in the map.
**
** bool map_open(MAP *map, int mode)
** Open the map for the indicated mode. Mode should
** be either O_RDONLY or O_RDWR. Return TRUE if it
** was opened successfully, FALSE otherwise. If the open
** failed an the MF_OPTIONAL flag is not set, it should
** also print an error. If the MF_ALIAS bit is set
** and this map class understands the @:@ convention, it
** should call aliaswait() before returning.
**
** void map_close(MAP *map)
** Close the map.
**
** This file also includes the implementation for getcanonname.
** It is currently implemented in a pretty ad-hoc manner; it ought
** to be more properly integrated into the map structure.
*/
#define DBMMODE 0644
extern bool aliaswait __P((MAP *, char *, int));
extern bool extract_canonname __P((char *, char *, char[]));
\f/*
** MAP_PARSEARGS -- parse config line arguments for database lookup
**
** This is a generic version of the map_parse method.
**
** Parameters:
** map -- the map being initialized.
** ap -- a pointer to the args on the config line.
**
** Returns:
** TRUE -- if everything parsed OK.
** FALSE -- otherwise.
**
** Side Effects:
** null terminates the filename; stores it in map
*/
bool
map_parseargs(map, ap)
MAP *map;
char *ap;
{
register char *p = ap;
map->map_mflags |= MF_TRY0NULL | MF_TRY1NULL;
for (;;)
{
while (isascii(*p) && isspace(*p))
p++;
if (*p != '-')
break;
switch (*++p)
{
case 'N':
map->map_mflags |= MF_INCLNULL;
map->map_mflags &= ~MF_TRY0NULL;
break;
case 'O':
map->map_mflags &= ~MF_TRY1NULL;
break;
case 'o':
map->map_mflags |= MF_OPTIONAL;
break;
case 'f':
map->map_mflags |= MF_NOFOLDCASE;
break;
case 'm':
map->map_mflags |= MF_MATCHONLY;
break;
case 'A':
map->map_mflags |= MF_APPEND;
break;
case 'q':
map->map_mflags |= MF_KEEPQUOTES;
break;
case 'a':
map->map_app = ++p;
break;
case 'k':
while (isascii(*++p) && isspace(*p))
continue;
map->map_keycolnm = p;
break;
case 'v':
while (isascii(*++p) && isspace(*p))
continue;
map->map_valcolnm = p;
break;
case 'z':
if (*++p != '\\')
map->map_coldelim = *p;
else
{
switch (*++p)
{
case 'n':
map->map_coldelim = '\n';
break;
case 't':
map->map_coldelim = '\t';
break;
default:
map->map_coldelim = '\\';
}
}
break;
#ifdef RESERVED_FOR_SUN
case 'd':
map->map_mflags |= MF_DOMAIN_WIDE;
break;
case 's':
/* info type */
break;
#endif
}
while (*p != '\0' && !(isascii(*p) && isspace(*p)))
p++;
if (*p != '\0')
*p++ = '\0';
}
if (map->map_app != NULL)
map->map_app = newstr(map->map_app);
if (map->map_keycolnm != NULL)
map->map_keycolnm = newstr(map->map_keycolnm);
if (map->map_valcolnm != NULL)
map->map_valcolnm = newstr(map->map_valcolnm);
if (*p != '\0')
{
map->map_file = p;
while (*p != '\0' && !(isascii(*p) && isspace(*p)))
p++;
if (*p != '\0')
*p++ = '\0';
map->map_file = newstr(map->map_file);
}
while (*p != '\0' && isascii(*p) && isspace(*p))
p++;
if (*p != '\0')
map->map_rebuild = newstr(p);
if (map->map_file == NULL &&
!bitset(MCF_OPTFILE, map->map_class->map_cflags))
{
syserr("No file name for %s map %s",
map->map_class->map_cname, map->map_mname);
return FALSE;
}
return TRUE;
}
\f/*
** MAP_REWRITE -- rewrite a database key, interpolating %n indications.
**
** It also adds the map_app string. It can be used as a utility
** in the map_lookup method.
**
** Parameters:
** map -- the map that causes this.
** s -- the string to rewrite, NOT necessarily null terminated.
** slen -- the length of s.
** av -- arguments to interpolate into buf.
**
** Returns:
** Pointer to rewritten result. This is static data that
** should be copied if it is to be saved!
**
** Side Effects:
** none.
*/
struct rwbuf
{
int rwb_len; /* size of buffer */
char *rwb_buf; /* ptr to buffer */
};
struct rwbuf RwBufs[2]; /* buffers for rewriting output */
char *
map_rewrite(map, s, slen, av)
register MAP *map;
register char *s;
int slen;
char **av;
{
register char *bp;
register char c;
char **avp;
register char *ap;
register struct rwbuf *rwb;
int i;
int len;
if (tTd(39, 1))
{
printf("map_rewrite(%.*s), av =", slen, s);
if (av == NULL)
printf(" (nullv)");
else
{
for (avp = av; *avp != NULL; avp++)
printf("\n\t%s", *avp);
}
printf("\n");
}
rwb = RwBufs;
if (av == NULL)
rwb++;
/* count expected size of output (can safely overestimate) */
i = len = slen;
if (av != NULL)
{
bp = s;
for (i = slen; --i >= 0 && (c = *bp++) != 0; )
{
if (c != '%')
continue;
if (--i < 0)
break;
c = *bp++;
if (!(isascii(c) && isdigit(c)))
continue;
for (avp = av; --c >= '0' && *avp != NULL; avp++)
continue;
if (*avp == NULL)
continue;
len += strlen(*avp);
}
}
if (map->map_app != NULL)
len += strlen(map->map_app);
if (rwb->rwb_len < ++len)
{
/* need to malloc additional space */
rwb->rwb_len = len;
if (rwb->rwb_buf != NULL)
free(rwb->rwb_buf);
rwb->rwb_buf = xalloc(rwb->rwb_len);
}
bp = rwb->rwb_buf;
if (av == NULL)
{
bcopy(s, bp, slen);
bp += slen;
}
else
{
while (--slen >= 0 && (c = *s++) != '\0')
{
if (c != '%')
{
pushc:
*bp++ = c;
continue;
}
if (--slen < 0 || (c = *s++) == '\0')
c = '%';
if (c == '%')
goto pushc;
if (!(isascii(c) && isdigit(c)))
{
*bp++ = '%';
goto pushc;
}
for (avp = av; --c >= '0' && *avp != NULL; avp++)
continue;
if (*avp == NULL)
continue;
/* transliterate argument into output string */
for (ap = *avp; (c = *ap++) != '\0'; )
*bp++ = c;
}
}
if (map->map_app != NULL)
strcpy(bp, map->map_app);
else
*bp = '\0';
if (tTd(39, 1))
printf("map_rewrite => %s\n", rwb->rwb_buf);
return rwb->rwb_buf;
}
\f/*
** INITMAPS -- initialize for aliasing
**
** Parameters:
** rebuild -- if TRUE, this rebuilds the cached versions.
** e -- current envelope.
**
** Returns:
** none.
**
** Side Effects:
** initializes aliases:
** if NDBM: opens the database.
** if ~NDBM: reads the aliases into the symbol table.
*/
void
initmaps(rebuild, e)
bool rebuild;
register ENVELOPE *e;
{
extern void map_init();
#if XDEBUG
checkfd012("entering initmaps");
#endif
CurEnv = e;
if (rebuild)
{
stabapply(map_init, 1);
stabapply(map_init, 2);
}
else
{
stabapply(map_init, 0);
}
#if XDEBUG
checkfd012("exiting initmaps");
#endif
}
void
map_init(s, rebuild)
register STAB *s;
int rebuild;
{
register MAP *map;
/* has to be a map */
if (s->s_type != ST_MAP)
return;
map = &s->s_map;
if (!bitset(MF_VALID, map->map_mflags))
return;
if (tTd(38, 2))
printf("map_init(%s:%s, %s, %d)\n",
map->map_class->map_cname == NULL ? "NULL" :
map->map_class->map_cname,
map->map_mname == NULL ? "NULL" : map->map_mname,
map->map_file == NULL ? "NULL" : map->map_file,
rebuild);
if (rebuild == (bitset(MF_ALIAS, map->map_mflags) &&
bitset(MCF_REBUILDABLE, map->map_class->map_cflags) ? 1 : 2))
{
if (tTd(38, 3))
printf("\twrong pass\n");
return;
}
/* if already open, close it (for nested open) */
if (bitset(MF_OPEN, map->map_mflags))
{
map->map_class->map_close(map);
map->map_mflags &= ~(MF_OPEN|MF_WRITABLE);
}
if (rebuild == 2)
{
rebuildaliases(map, FALSE);
}
else
{
if (map->map_class->map_open(map, O_RDONLY))
{
if (tTd(38, 4))
printf("\t%s:%s %s: valid\n",
map->map_class->map_cname == NULL ? "NULL" :
map->map_class->map_cname,
map->map_mname == NULL ? "NULL" :
map->map_mname,
map->map_file == NULL ? "NULL" :
map->map_file);
map->map_mflags |= MF_OPEN;
}
else
{
if (tTd(38, 4))
printf("\t%s:%s %s: invalid: %s\n",
map->map_class->map_cname == NULL ? "NULL" :
map->map_class->map_cname,
map->map_mname == NULL ? "NULL" :
map->map_mname,
map->map_file == NULL ? "NULL" :
map->map_file,
errstring(errno));
if (!bitset(MF_OPTIONAL, map->map_mflags))
{
extern MAPCLASS BogusMapClass;
map->map_class = &BogusMapClass;
map->map_mflags |= MF_OPEN;
}
}
}
}
\f/*
** GETCANONNAME -- look up name using service switch
**
** Parameters:
** host -- the host name to look up.
** hbsize -- the size of the host buffer.
** trymx -- if set, try MX records.
**
** Returns:
** TRUE -- if the host was found.
** FALSE -- otherwise.
*/
bool
getcanonname(host, hbsize, trymx)
char *host;
int hbsize;
bool trymx;
{
int nmaps;
int mapno;
bool found = FALSE;
auto int stat;
char *maptype[MAXMAPSTACK];
short mapreturn[MAXMAPACTIONS];
extern int h_errno;
nmaps = switch_map_find("hosts", maptype, mapreturn);
for (mapno = 0; mapno < nmaps; mapno++)
{
int i;
if (tTd(38, 20))
printf("getcanonname(%s), trying %s\n",
host, maptype[mapno]);
if (strcmp("files", maptype[mapno]) == 0)
{
extern bool text_getcanonname __P((char *, int, int *));
found = text_getcanonname(host, hbsize, &stat);
}
#ifdef NIS
else if (strcmp("nis", maptype[mapno]) == 0)
{
extern bool nis_getcanonname __P((char *, int, int *));
found = nis_getcanonname(host, hbsize, &stat);
}
#endif
#ifdef NISPLUS
else if (strcmp("nisplus", maptype[mapno]) == 0)
{
extern bool nisplus_getcanonname __P((char *, int, int *));
found = nisplus_getcanonname(host, hbsize, &stat);
}
#endif
#if NAMED_BIND
else if (strcmp("dns", maptype[mapno]) == 0)
{
extern bool dns_getcanonname __P((char *, int, bool, int *));
found = dns_getcanonname(host, hbsize, trymx, &stat);
}
#endif
else
{
found = FALSE;
stat = EX_UNAVAILABLE;
}
if (found)
break;
/* see if we should continue */
if (stat == EX_TEMPFAIL)
i = MA_TRYAGAIN;
else if (stat == EX_NOHOST)
i = MA_NOTFOUND;
else
i = MA_UNAVAIL;
if (bitset(1 << mapno, mapreturn[i]))
break;
}
if (found)
{
char *d;
if (tTd(38, 20))
printf("getcanonname(%s), found\n", host);
/*
** If returned name is still single token, compensate
** by tagging on $m. This is because some sites set
** up their DNS or NIS databases wrong.
*/
if ((d = strchr(host, '.')) == NULL || d[1] == '\0')
{
d = macvalue('m', CurEnv);
if (d != NULL &&
hbsize > (int) (strlen(host) + strlen(d) + 1))
{
if (host[strlen(host) - 1] != '.')
strcat(host, ".");
strcat(host, d);
}
else
{
return FALSE;
}
}
return TRUE;
}
if (tTd(38, 20))
printf("getcanonname(%s), failed, stat=%d\n", host, stat);
#if NAMED_BIND
if (stat == EX_NOHOST)
h_errno = HOST_NOT_FOUND;
else
h_errno = TRY_AGAIN;
#endif
return FALSE;
}
\f/*
** EXTRACT_CANONNAME -- extract canonical name from /etc/hosts entry
**
** Parameters:
** name -- the name against which to match.
** line -- the /etc/hosts line.
** cbuf -- the location to store the result.
**
** Returns:
** TRUE -- if the line matched the desired name.
** FALSE -- otherwise.
*/
bool
extract_canonname(name, line, cbuf)
char *name;
char *line;
char cbuf[];
{
int i;
char *p;
bool found = FALSE;
extern char *get_column();
cbuf[0] = '\0';
if (line[0] == '#')
return FALSE;
for (i = 1; ; i++)
{
char nbuf[MAXNAME + 1];
p = get_column(line, i, '\0', nbuf);
if (p == NULL)
break;
if (cbuf[0] == '\0' ||
(strchr(cbuf, '.') == NULL && strchr(p, '.') != NULL))
strcpy(cbuf, p);
if (strcasecmp(name, p) == 0)
found = TRUE;
}
if (found && strchr(cbuf, '.') == NULL)
{
/* try to add a domain on the end of the name */
char *domain = macvalue('m', CurEnv);
if (domain != NULL &&
strlen(domain) + strlen(cbuf) + 1 < MAXNAME)
{
p = &cbuf[strlen(cbuf)];
*p++ = '.';
strcpy(p, domain);
}
}
return found;
}
\f/*
** NDBM modules
*/
#ifdef NDBM
/*
** DBM_MAP_OPEN -- DBM-style map open
*/
bool
ndbm_map_open(map, mode)
MAP *map;
int mode;
{
register DBM *dbm;
struct stat st;
if (tTd(38, 2))
printf("ndbm_map_open(%s, %s, %d)\n",
map->map_mname, map->map_file, mode);
if (mode == O_RDWR)
mode |= O_CREAT|O_TRUNC;
/* open the database */
dbm = dbm_open(map->map_file, mode, DBMMODE);
if (dbm == NULL)
{
if (aliaswait(map, ".pag", FALSE))
return TRUE;
if (!bitset(MF_OPTIONAL, map->map_mflags))
syserr("Cannot open DBM database %s", map->map_file);
return FALSE;
}
map->map_db1 = (void *) dbm;
if (mode == O_RDONLY)
{
if (bitset(MF_ALIAS, map->map_mflags) &&
!aliaswait(map, ".pag", TRUE))
return FALSE;
}
else
{
int fd;
/* exclusive lock for duration of rebuild */
fd = dbm_dirfno((DBM *) map->map_db1);
if (fd >= 0 && !bitset(MF_LOCKED, map->map_mflags) &&
lockfile(fd, map->map_file, ".dir", LOCK_EX))
map->map_mflags |= MF_LOCKED;
}
if (fstat(dbm_dirfno((DBM *) map->map_db1), &st) >= 0)
map->map_mtime = st.st_mtime;
return TRUE;
}
/*
** DBM_MAP_LOOKUP -- look up a datum in a DBM-type map
*/
char *
ndbm_map_lookup(map, name, av, statp)
MAP *map;
char *name;
char **av;
int *statp;
{
datum key, val;
int fd;
char keybuf[MAXNAME + 1];
if (tTd(38, 20))
printf("ndbm_map_lookup(%s, %s)\n",
map->map_mname, name);
key.dptr = name;
key.dsize = strlen(name);
if (!bitset(MF_NOFOLDCASE, map->map_mflags))
{
if (key.dsize > sizeof keybuf - 1)
key.dsize = sizeof keybuf - 1;
bcopy(key.dptr, keybuf, key.dsize + 1);
makelower(keybuf);
key.dptr = keybuf;
}
fd = dbm_dirfno((DBM *) map->map_db1);
if (fd >= 0 && !bitset(MF_LOCKED, map->map_mflags))
(void) lockfile(fd, map->map_file, ".dir", LOCK_SH);
val.dptr = NULL;
if (bitset(MF_TRY0NULL, map->map_mflags))
{
val = dbm_fetch((DBM *) map->map_db1, key);
if (val.dptr != NULL)
map->map_mflags &= ~MF_TRY1NULL;
}
if (val.dptr == NULL && bitset(MF_TRY1NULL, map->map_mflags))
{
key.dsize++;
val = dbm_fetch((DBM *) map->map_db1, key);
if (val.dptr != NULL)
map->map_mflags &= ~MF_TRY0NULL;
}
if (fd >= 0 && !bitset(MF_LOCKED, map->map_mflags))
(void) lockfile(fd, map->map_file, ".dir", LOCK_UN);
if (val.dptr == NULL)
return NULL;
if (bitset(MF_MATCHONLY, map->map_mflags))
return map_rewrite(map, name, strlen(name), NULL);
else
return map_rewrite(map, val.dptr, val.dsize, av);
}
/*
** DBM_MAP_STORE -- store a datum in the database
*/
void
ndbm_map_store(map, lhs, rhs)
register MAP *map;
char *lhs;
char *rhs;
{
datum key;
datum data;
int stat;
if (tTd(38, 12))
printf("ndbm_map_store(%s, %s, %s)\n",
map->map_mname, lhs, rhs);
key.dsize = strlen(lhs);
key.dptr = lhs;
data.dsize = strlen(rhs);
data.dptr = rhs;
if (bitset(MF_INCLNULL, map->map_mflags))
{
key.dsize++;
data.dsize++;
}
stat = dbm_store((DBM *) map->map_db1, key, data, DBM_INSERT);
if (stat > 0)
{
if (!bitset(MF_APPEND, map->map_mflags))
usrerr("050 Warning: duplicate alias name %s", lhs);
else
{
static char *buf = NULL;
static int bufsiz = 0;
auto int xstat;
datum old;
old.dptr = ndbm_map_lookup(map, key.dptr, NULL, &xstat);
if (old.dptr != NULL && *old.dptr != '\0')
{
old.dsize = strlen(old.dptr);
if (data.dsize + old.dsize + 2 > bufsiz)
{
if (buf != NULL)
(void) free(buf);
bufsiz = data.dsize + old.dsize + 2;
buf = xalloc(bufsiz);
}
sprintf(buf, "%s,%s", data.dptr, old.dptr);
data.dsize = data.dsize + old.dsize + 1;
data.dptr = buf;
if (tTd(38, 9))
printf("ndbm_map_store append=%s\n", data.dptr);
}
}
stat = dbm_store((DBM *) map->map_db1, key, data, DBM_REPLACE);
}
if (stat != 0)
syserr("readaliases: dbm put (%s)", lhs);
}
/*
** NDBM_MAP_CLOSE -- close the database
*/
void
ndbm_map_close(map)
register MAP *map;
{
if (tTd(38, 9))
printf("ndbm_map_close(%s, %s, %x)\n",
map->map_mname, map->map_file, map->map_mflags);
if (bitset(MF_WRITABLE, map->map_mflags))
{
#ifdef NIS
bool inclnull;
char buf[200];
inclnull = bitset(MF_INCLNULL, map->map_mflags);
map->map_mflags &= ~MF_INCLNULL;
if (strstr(map->map_file, "/yp/") != NULL)
{
(void) sprintf(buf, "%010ld", curtime());
ndbm_map_store(map, "YP_LAST_MODIFIED", buf);
(void) gethostname(buf, sizeof buf);
ndbm_map_store(map, "YP_MASTER_NAME", buf);
}
if (inclnull)
map->map_mflags |= MF_INCLNULL;
#endif
/* write out the distinguished alias */
ndbm_map_store(map, "@", "@");
}
dbm_close((DBM *) map->map_db1);
}
#endif
\f/*
** NEWDB (Hash and BTree) Modules
*/
#ifdef NEWDB
/*
** BT_MAP_OPEN, HASH_MAP_OPEN -- database open primitives.
**
** These do rather bizarre locking. If you can lock on open,
** do that to avoid the condition of opening a database that
** is being rebuilt. If you don't, we'll try to fake it, but
** there will be a race condition. If opening for read-only,
** we immediately release the lock to avoid freezing things up.
** We really ought to hold the lock, but guarantee that we won't
** be pokey about it. That's hard to do.
*/
bool
bt_map_open(map, mode)
MAP *map;
int mode;
{
DB *db;
int i;
int omode;
int fd;
struct stat st;
char buf[MAXNAME + 1];
if (tTd(38, 2))
printf("bt_map_open(%s, %s, %d)\n",
map->map_mname, map->map_file, mode);
omode = mode;
if (omode == O_RDWR)
{
omode |= O_CREAT|O_TRUNC;
#if defined(O_EXLOCK) && HASFLOCK
omode |= O_EXLOCK;
# if !OLD_NEWDB
}
else
{
omode |= O_SHLOCK;
# endif
#endif
}
(void) strcpy(buf, map->map_file);
i = strlen(buf);
if (i < 3 || strcmp(&buf[i - 3], ".db") != 0)
(void) strcat(buf, ".db");
db = dbopen(buf, omode, DBMMODE, DB_BTREE, NULL);
if (db == NULL)
{
#ifdef MAYBENEXTRELEASE
if (aliaswait(map, ".db", FALSE))
return TRUE;
#endif
if (!bitset(MF_OPTIONAL, map->map_mflags))
syserr("Cannot open BTREE database %s", map->map_file);
return FALSE;
}
#if !OLD_NEWDB
fd = db->fd(db);
# if defined(O_EXLOCK) && HASFLOCK
if (fd >= 0)
{
if (mode == O_RDONLY)
(void) lockfile(fd, map->map_file, ".db", LOCK_UN);
else
map->map_mflags |= MF_LOCKED;
}
# else
if (mode == O_RDWR && fd >= 0)
{
if (lockfile(fd, map->map_file, ".db", LOCK_EX))
map->map_mflags |= MF_LOCKED;
}
# endif
#endif
/* try to make sure that at least the database header is on disk */
if (mode == O_RDWR)
#if OLD_NEWDB
(void) db->sync(db);
#else
(void) db->sync(db, 0);
if (fd >= 0 && fstat(fd, &st) >= 0)
map->map_mtime = st.st_mtime;
#endif
map->map_db2 = (void *) db;
if (mode == O_RDONLY && bitset(MF_ALIAS, map->map_mflags))
if (!aliaswait(map, ".db", TRUE))
return FALSE;
return TRUE;
}
/*
** HASH_MAP_INIT -- HASH-style map initialization
*/
bool
hash_map_open(map, mode)
MAP *map;
int mode;
{
DB *db;
int i;
int omode;
int fd;
struct stat st;
char buf[MAXNAME + 1];
if (tTd(38, 2))
printf("hash_map_open(%s, %s, %d)\n",
map->map_mname, map->map_file, mode);
omode = mode;
if (omode == O_RDWR)
{
omode |= O_CREAT|O_TRUNC;
#if defined(O_EXLOCK) && HASFLOCK
omode |= O_EXLOCK;
# if !OLD_NEWDB
}
else
{
omode |= O_SHLOCK;
# endif
#endif
}
(void) strcpy(buf, map->map_file);
i = strlen(buf);
if (i < 3 || strcmp(&buf[i - 3], ".db") != 0)
(void) strcat(buf, ".db");
db = dbopen(buf, omode, DBMMODE, DB_HASH, NULL);
if (db == NULL)
{
#ifdef MAYBENEXTRELEASE
if (aliaswait(map, ".db", FALSE))
return TRUE;
#endif
if (!bitset(MF_OPTIONAL, map->map_mflags))
syserr("Cannot open HASH database %s", map->map_file);
return FALSE;
}
#if !OLD_NEWDB
fd = db->fd(db);
# if defined(O_EXLOCK) && HASFLOCK
if (fd >= 0)
{
if (mode == O_RDONLY)
(void) lockfile(fd, map->map_file, ".db", LOCK_UN);
else
map->map_mflags |= MF_LOCKED;
}
# else
if (mode == O_RDWR && fd >= 0)
{
if (lockfile(fd, map->map_file, ".db", LOCK_EX))
map->map_mflags |= MF_LOCKED;
}
# endif
#endif
/* try to make sure that at least the database header is on disk */
if (mode == O_RDWR)
#if OLD_NEWDB
(void) db->sync(db);
#else
(void) db->sync(db, 0);
if (fd >= 0 && fstat(fd, &st) >= 0)
map->map_mtime = st.st_mtime;
#endif
map->map_db2 = (void *) db;
if (mode == O_RDONLY && bitset(MF_ALIAS, map->map_mflags))
if (!aliaswait(map, ".db", TRUE))
return FALSE;
return TRUE;
}
/*
** DB_MAP_LOOKUP -- look up a datum in a BTREE- or HASH-type map
*/
char *
db_map_lookup(map, name, av, statp)
MAP *map;
char *name;
char **av;
int *statp;
{
DBT key, val;
register DB *db = (DB *) map->map_db2;
int st;
int saveerrno;
int fd;
char keybuf[MAXNAME + 1];
if (tTd(38, 20))
printf("db_map_lookup(%s, %s)\n",
map->map_mname, name);
key.size = strlen(name);
if (key.size > sizeof keybuf - 1)
key.size = sizeof keybuf - 1;
key.data = keybuf;
bcopy(name, keybuf, key.size + 1);
if (!bitset(MF_NOFOLDCASE, map->map_mflags))
makelower(keybuf);
#if !OLD_NEWDB
fd = db->fd(db);
if (fd >= 0 && !bitset(MF_LOCKED, map->map_mflags))
(void) lockfile(db->fd(db), map->map_file, ".db", LOCK_SH);
#endif
st = 1;
if (bitset(MF_TRY0NULL, map->map_mflags))
{
st = db->get(db, &key, &val, 0);
if (st == 0)
map->map_mflags &= ~MF_TRY1NULL;
}
if (st != 0 && bitset(MF_TRY1NULL, map->map_mflags))
{
key.size++;
st = db->get(db, &key, &val, 0);
if (st == 0)
map->map_mflags &= ~MF_TRY0NULL;
}
saveerrno = errno;
#if !OLD_NEWDB
if (fd >= 0 && !bitset(MF_LOCKED, map->map_mflags))
(void) lockfile(fd, map->map_file, ".db", LOCK_UN);
#endif
if (st != 0)
{
errno = saveerrno;
if (st < 0)
syserr("db_map_lookup: get (%s)", name);
return NULL;
}
if (bitset(MF_MATCHONLY, map->map_mflags))
return map_rewrite(map, name, strlen(name), NULL);
else
return map_rewrite(map, val.data, val.size, av);
}
/*
** DB_MAP_STORE -- store a datum in the NEWDB database
*/
void
db_map_store(map, lhs, rhs)
register MAP *map;
char *lhs;
char *rhs;
{
int stat;
DBT key;
DBT data;
register DB *db = map->map_db2;
if (tTd(38, 20))
printf("db_map_store(%s, %s, %s)\n",
map->map_mname, lhs, rhs);
key.size = strlen(lhs);
key.data = lhs;
data.size = strlen(rhs);
data.data = rhs;
if (bitset(MF_INCLNULL, map->map_mflags))
{
key.size++;
data.size++;
}
stat = db->put(db, &key, &data, R_NOOVERWRITE);
if (stat > 0)
{
if (!bitset(MF_APPEND, map->map_mflags))
usrerr("050 Warning: duplicate alias name %s", lhs);
else
{
static char *buf = NULL;
static int bufsiz = 0;
DBT old;
old.data = db_map_lookup(map, key.data, NULL, &stat);
if (old.data != NULL)
{
old.size = strlen(old.data);
if (data.size + old.size + 2 > bufsiz)
{
if (buf != NULL)
(void) free(buf);
bufsiz = data.size + old.size + 2;
buf = xalloc(bufsiz);
}
sprintf(buf, "%s,%s", data.data, old.data);
data.size = data.size + old.size + 1;
data.data = buf;
if (tTd(38, 9))
printf("db_map_store append=%s\n", data.data);
}
}
stat = db->put(db, &key, &data, 0);
}
if (stat != 0)
syserr("readaliases: db put (%s)", lhs);
}
/*
** DB_MAP_CLOSE -- add distinguished entries and close the database
*/
void
db_map_close(map)
MAP *map;
{
register DB *db = map->map_db2;
if (tTd(38, 9))
printf("db_map_close(%s, %s, %x)\n",
map->map_mname, map->map_file, map->map_mflags);
if (bitset(MF_WRITABLE, map->map_mflags))
{
/* write out the distinguished alias */
db_map_store(map, "@", "@");
}
if (db->close(db) != 0)
syserr("readaliases: db close failure");
}
#endif
\f/*
** NIS Modules
*/
# ifdef NIS
# ifndef YPERR_BUSY
# define YPERR_BUSY 16
# endif
/*
** NIS_MAP_OPEN -- open DBM map
*/
bool
nis_map_open(map, mode)
MAP *map;
int mode;
{
int yperr;
register char *p;
auto char *vp;
auto int vsize;
if (tTd(38, 2))
printf("nis_map_open(%s, %s)\n",
map->map_mname, map->map_file);
if (mode != O_RDONLY)
{
/* issue a pseudo-error message */
#ifdef ENOSYS
errno = ENOSYS;
#else
# ifdef EFTYPE
errno = EFTYPE;
# else
errno = ENXIO;
# endif
#endif
return FALSE;
}
p = strchr(map->map_file, '@');
if (p != NULL)
{
*p++ = '\0';
if (*p != '\0')
map->map_domain = p;
}
if (*map->map_file == '\0')
map->map_file = "mail.aliases";
if (map->map_domain == NULL)
{
yperr = yp_get_default_domain(&map->map_domain);
if (yperr != 0)
{
if (!bitset(MF_OPTIONAL, map->map_mflags))
syserr("421 NIS map %s specified, but NIS not running\n",
map->map_file);
return FALSE;
}
}
/* check to see if this map actually exists */
yperr = yp_match(map->map_domain, map->map_file, "@", 1,
&vp, &vsize);
if (tTd(38, 10))
printf("nis_map_open: yp_match(%s, %s) => %s\n",
map->map_domain, map->map_file, yperr_string(yperr));
if (yperr == 0 || yperr == YPERR_KEY || yperr == YPERR_BUSY)
{
if (!bitset(MF_ALIAS, map->map_mflags) ||
aliaswait(map, NULL, TRUE))
return TRUE;
}
if (!bitset(MF_OPTIONAL, map->map_mflags))
{
syserr("421 Cannot bind to map %s in domain %s: %s",
map->map_file, map->map_domain, yperr_string(yperr));
}
return FALSE;
}
/*
** NIS_MAP_LOOKUP -- look up a datum in a NIS map
*/
char *
nis_map_lookup(map, name, av, statp)
MAP *map;
char *name;
char **av;
int *statp;
{
char *vp;
auto int vsize;
int buflen;
int yperr;
char keybuf[MAXNAME + 1];
if (tTd(38, 20))
printf("nis_map_lookup(%s, %s)\n",
map->map_mname, name);
buflen = strlen(name);
if (buflen > sizeof keybuf - 1)
buflen = sizeof keybuf - 1;
bcopy(name, keybuf, buflen + 1);
if (!bitset(MF_NOFOLDCASE, map->map_mflags))
makelower(keybuf);
yperr = YPERR_KEY;
if (bitset(MF_TRY0NULL, map->map_mflags))
{
yperr = yp_match(map->map_domain, map->map_file, keybuf, buflen,
&vp, &vsize);
if (yperr == 0)
map->map_mflags &= ~MF_TRY1NULL;
}
if (yperr == YPERR_KEY && bitset(MF_TRY1NULL, map->map_mflags))
{
buflen++;
yperr = yp_match(map->map_domain, map->map_file, keybuf, buflen,
&vp, &vsize);
if (yperr == 0)
map->map_mflags &= ~MF_TRY0NULL;
}
if (yperr != 0)
{
if (yperr != YPERR_KEY && yperr != YPERR_BUSY)
map->map_mflags &= ~(MF_VALID|MF_OPEN);
return NULL;
}
if (bitset(MF_MATCHONLY, map->map_mflags))
return map_rewrite(map, name, strlen(name), NULL);
else
return map_rewrite(map, vp, vsize, av);
}
/*
** NIS_GETCANONNAME -- look up canonical name in NIS
*/
bool
nis_getcanonname(name, hbsize, statp)
char *name;
int hbsize;
int *statp;
{
char *vp;
auto int vsize;
int keylen;
int yperr;
static bool try0null = TRUE;
static bool try1null = TRUE;
static char *yp_domain = NULL;
char *domain;
char host_record[MAXLINE];
char cbuf[MAXNAME];
char nbuf[MAXNAME + 1];
extern char *get_column();
if (tTd(38, 20))
printf("nis_getcanonname(%s)\n", name);
if (strlen(name) >= sizeof nbuf)
{
*statp = EX_UNAVAILABLE;
return FALSE;
}
(void) strcpy(nbuf, name);
shorten_hostname(nbuf);
/* we only accept single token search key */
if (strchr(nbuf, '.'))
{
*statp = EX_NOHOST;
return FALSE;
}
keylen = strlen(nbuf);
if (yp_domain == NULL)
yp_get_default_domain(&yp_domain);
makelower(nbuf);
yperr = YPERR_KEY;
if (try0null)
{
yperr = yp_match(yp_domain, "hosts.byname", nbuf, keylen,
&vp, &vsize);
if (yperr == 0)
try1null = FALSE;
}
if (yperr == YPERR_KEY && try1null)
{
keylen++;
yperr = yp_match(yp_domain, "hosts.byname", nbuf, keylen,
&vp, &vsize);
if (yperr == 0)
try0null = FALSE;
}
if (yperr != 0)
{
if (yperr == YPERR_KEY)
*statp = EX_NOHOST;
else if (yperr == YPERR_BUSY)
*statp = EX_TEMPFAIL;
else
*statp = EX_UNAVAILABLE;
return FALSE;
}
strncpy(host_record, vp, vsize);
host_record[vsize] = '\0';
if (tTd(38, 44))
printf("got record `%s'\n", host_record);
if (!extract_canonname(nbuf, host_record, cbuf))
{
/* this should not happen, but.... */
*statp = EX_NOHOST;
return FALSE;
}
if (hbsize < strlen(cbuf))
{
*statp = EX_UNAVAILABLE;
return FALSE;
}
strcpy(name, cbuf);
*statp = EX_OK;
return TRUE;
}
#endif
\f/*
** NISPLUS Modules
**
** This code donated by Sun Microsystems.
*/
#ifdef NISPLUS
#undef NIS /* symbol conflict in nis.h */
#include <rpcsvc/nis.h>
#include <rpcsvc/nislib.h>
#define EN_col(col) zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val
#define COL_NAME(res,i) ((res->objects.objects_val)->TA_data.ta_cols.ta_cols_val)[i].tc_name
#define COL_MAX(res) ((res->objects.objects_val)->TA_data.ta_cols.ta_cols_len)
#define PARTIAL_NAME(x) ((x)[strlen(x) - 1] != '.')
/*
** NISPLUS_MAP_OPEN -- open nisplus table
*/
bool
nisplus_map_open(map, mode)
MAP *map;
int mode;
{
register char *p;
char qbuf[MAXLINE + NIS_MAXNAMELEN];
nis_result *res = NULL;
u_int objs_len;
nis_object *obj_ptr;
int retry_cnt, max_col, i;
if (tTd(38, 2))
printf("nisplus_map_open(%s, %s, %d)\n",
map->map_mname, map->map_file, mode);
if (mode != O_RDONLY)
{
errno = ENODEV;
return FALSE;
}
if (*map->map_file == '\0')
map->map_file = "mail_aliases.org_dir";
if (PARTIAL_NAME(map->map_file) && map->map_domain == NULL)
{
/* set default NISPLUS Domain to $m */
extern char *nisplus_default_domain();
map->map_domain = newstr(nisplus_default_domain());
if (tTd(38, 2))
printf("nisplus_map_open(%s): using domain %s\n",
map->map_file, map->map_domain);
}
if (!PARTIAL_NAME(map->map_file))
map->map_domain = newstr("");
/* check to see if this map actually exists */
if (PARTIAL_NAME(map->map_file))
sprintf(qbuf, "%s.%s", map->map_file, map->map_domain);
else
strcpy(qbuf, map->map_file);
retry_cnt = 0;
while (res == NULL || res->status != NIS_SUCCESS)
{
res = nis_lookup(qbuf, FOLLOW_LINKS);
switch (res->status)
{
case NIS_SUCCESS:
case NIS_TRYAGAIN:
case NIS_RPCERROR:
case NIS_NAMEUNREACHABLE:
break;
default: /* all other nisplus errors */
#if 0
if (!bitset(MF_OPTIONAL, map->map_mflags))
syserr("421 Cannot find table %s.%s: %s",
map->map_file, map->map_domain,
nis_sperrno(res->status));
#endif
errno = EBADR;
return FALSE;
}
sleep(2); /* try not to overwhelm hosed server */
if (retry_cnt++ > 4)
{
errno = EBADR;
return FALSE;
}
}
if (NIS_RES_NUMOBJ(res) != 1 ||
(NIS_RES_OBJECT(res)->zo_data.zo_type != TABLE_OBJ))
{
if (tTd(38, 10))
printf("nisplus_map_open: %s is not a table\n", qbuf);
#if 0
if (!bitset(MF_OPTIONAL, map->map_mflags))
syserr("421 %s.%s: %s is not a table",
map->map_file, map->map_domain,
nis_sperrno(res->status));
#endif
errno = EBADR;
return FALSE;
}
/* default key column is column 0 */
if (map->map_keycolnm == NULL)
map->map_keycolnm = newstr(COL_NAME(res,0));
max_col = COL_MAX(res);
/* verify the key column exist */
for (i=0; i< max_col; i++)
{
if (!strcmp(map->map_keycolnm, COL_NAME(res,i)))
break;
}
if (i == max_col)
{
if (tTd(38, 2))
printf("nisplus_map_open(%s): can not find key column %s\n",
map->map_file, map->map_keycolnm);
errno = EBADR;
return FALSE;
}
/* default value column is the last column */
if (map->map_valcolnm == NULL)
{
map->map_valcolno = max_col - 1;
return TRUE;
}
for (i=0; i< max_col; i++)
{
if (strcmp(map->map_valcolnm, COL_NAME(res,i)) == 0)
{
map->map_valcolno = i;
return TRUE;
}
}
if (tTd(38, 2))
printf("nisplus_map_open(%s): can not find column %s\n",
map->map_file, map->map_keycolnm);
errno = EBADR;
return FALSE;
}
/*
** NISPLUS_MAP_LOOKUP -- look up a datum in a NISPLUS table
*/
char *
nisplus_map_lookup(map, name, av, statp)
MAP *map;
char *name;
char **av;
int *statp;
{
char *vp;
auto int vsize;
int buflen;
char search_key[MAXNAME + 1];
char qbuf[MAXLINE + NIS_MAXNAMELEN];
nis_result *result;
if (tTd(38, 20))
printf("nisplus_map_lookup(%s, %s)\n",
map->map_mname, name);
if (!bitset(MF_OPEN, map->map_mflags))
{
if (nisplus_map_open(map, O_RDONLY))
map->map_mflags |= MF_OPEN;
else
{
*statp = EX_UNAVAILABLE;
return NULL;
}
}
buflen = strlen(name);
if (buflen > sizeof search_key - 1)
buflen = sizeof search_key - 1;
bcopy(name, search_key, buflen + 1);
if (!bitset(MF_NOFOLDCASE, map->map_mflags))
makelower(search_key);
/* construct the query */
if (PARTIAL_NAME(map->map_file))
sprintf(qbuf, "[%s=%s],%s.%s", map->map_keycolnm,
search_key, map->map_file, map->map_domain);
else
sprintf(qbuf, "[%s=%s],%s", map->map_keycolnm,
search_key, map->map_file);
if (tTd(38, 20))
printf("qbuf=%s\n", qbuf);
result = nis_list(qbuf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
if (result->status == NIS_SUCCESS)
{
int count;
char *str;
if ((count = NIS_RES_NUMOBJ(result)) != 1)
{
if (LogLevel > 10)
syslog(LOG_WARNING,
"%s:Lookup error, expected 1 entry, got (%d)",
map->map_file, count);
/* ignore second entry */
if (tTd(38, 20))
printf("nisplus_map_lookup(%s), got %d entries, additional entries ignored\n",
name, count);
}
vp = ((NIS_RES_OBJECT(result))->EN_col(map->map_valcolno));
/* set the length of the result */
if (vp == NULL)
vp = "";
vsize = strlen(vp);
if (tTd(38, 20))
printf("nisplus_map_lookup(%s), found %s\n",
name, vp);
if (bitset(MF_MATCHONLY, map->map_mflags))
str = map_rewrite(map, name, strlen(name), NULL);
else
str = map_rewrite(map, vp, vsize, av);
nis_freeresult(result);
#ifdef MAP_EXIT_STAT
*statp = EX_OK;
#endif
return str;
}
else
{
#ifdef MAP_EXIT_STAT
if (result->status == NIS_NOTFOUND)
*statp = EX_NOTFOUND;
else if (result->status == NIS_TRYAGAIN)
*statp = EX_TEMPFAIL;
else
{
*statp = EX_UNAVAILABLE;
map->map_mflags &= ~(MF_VALID|MF_OPEN);
}
#else
if ((result->status != NIS_NOTFOUND) &&
(result->status != NIS_TRYAGAIN))
map->map_mflags &= ~(MF_VALID|MF_OPEN);
#endif
}
if (tTd(38, 20))
printf("nisplus_map_lookup(%s), failed\n", name);
nis_freeresult(result);
return NULL;
}
/*
** NISPLUS_GETCANONNAME -- look up canonical name in NIS+
*/
bool
nisplus_getcanonname(name, hbsize, statp)
char *name;
int hbsize;
int *statp;
{
char *vp;
auto int vsize;
int buflen;
nis_result *result;
char *p;
int len;
char nbuf[MAXNAME + 1];
char qbuf[MAXLINE + NIS_MAXNAMELEN];
if (strlen(name) >= sizeof nbuf)
{
*statp = EX_UNAVAILABLE;
return FALSE;
}
(void) strcpy(nbuf, name);
shorten_hostname(nbuf);
p = strchr(nbuf, '.');
if (p == NULL)
{
/* single token */
sprintf(qbuf, "[name=%s],hosts.org_dir", nbuf);
}
else if (p[1] != '\0')
{
/* multi token -- take only first token in nbuf */
*p = '\0';
sprintf(qbuf, "[name=%s],hosts.org_dir.%s", nbuf, &p[1]);
}
else
{
*statp = EX_NOHOST;
return FALSE;
}
if (tTd(38, 20))
printf("\nnisplus_getcanoname(%s), qbuf=%s\n",
name, qbuf);
result = nis_list(qbuf, EXPAND_NAME|FOLLOW_LINKS|FOLLOW_PATH,
NULL, NULL);
if (result->status == NIS_SUCCESS)
{
int count;
char *str;
char *domain;
if ((count = NIS_RES_NUMOBJ(result)) != 1)
{
#ifdef LOG
if (LogLevel > 10)
syslog(LOG_WARNING,
"nisplus_getcanonname: Lookup error, expected 1 entry, got (%d)",
count);
#endif
/* ignore second entry */
if (tTd(38, 20))
printf("nisplus_getcanoname(%s), got %d entries, addtional entries ignores\n", name);
}
if (tTd(38, 20))
printf("nisplus_getcanoname(%s), found in directory \"%s\"\n",
name, (NIS_RES_OBJECT(result))->zo_domain);
vp = ((NIS_RES_OBJECT(result))->EN_col(0));
vsize = strlen(vp);
if (tTd(38, 20))
printf("nisplus_getcanonname(%s), found %s\n",
name, vp);
if (strchr(vp, '.') != NULL)
{
domain = "";
}
else
{
domain = macvalue('m', CurEnv);
if (domain == NULL)
domain = "";
}
if (hbsize > vsize + (int) strlen(domain) + 1)
{
if (domain[0] == '\0')
strcpy(name, vp);
else
sprintf(name, "%s.%s", vp, domain);
*statp = EX_OK;
}
else
*statp = EX_NOHOST;
nis_freeresult(result);
return TRUE;
}
else
{
if (result->status == NIS_NOTFOUND)
*statp = EX_NOHOST;
else if (result->status == NIS_TRYAGAIN)
*statp = EX_TEMPFAIL;
else
*statp = EX_UNAVAILABLE;
}
if (tTd(38, 20))
printf("nisplus_getcanonname(%s), failed, status=%d, nsw_stat=%d\n",
name, result->status, *statp);
nis_freeresult(result);
return FALSE;
}
char *
nisplus_default_domain()
{
static char default_domain[MAXNAME + 1] = "";
char *p;
if (default_domain[0] != '\0')
return(default_domain);
p = nis_local_directory();
strcpy(default_domain, p);
return default_domain;
}
#endif /* NISPLUS */
\f/*
** HESIOD Modules
*/
#ifdef HESIOD
#include <hesiod.h>
char *
hes_map_lookup(map, name, av, statp)
MAP *map;
char *name;
char **av;
int *statp;
{
char **hp;
if (tTd(38, 20))
printf("hes_map_lookup(%s, %s)\n", map->map_file, name);
if (name[0] == '\\')
{
char *np;
int nl;
char nbuf[MAXNAME];
nl = strlen(name);
if (nl < sizeof nbuf - 1)
np = nbuf;
else
np = xalloc(strlen(name) + 2);
np[0] = '\\';
strcpy(&np[1], name);
hp = hes_resolve(np, map->map_file);
if (np != nbuf)
free(np);
}
else
{
hp = hes_resolve(name, map->map_file);
}
if (hp == NULL || hp[0] == NULL)
return NULL;
if (bitset(MF_MATCHONLY, map->map_mflags))
return map_rewrite(map, name, strlen(name), NULL);
else
return map_rewrite(map, hp[0], strlen(hp[0]), av);
}
#endif
\f/*
** NeXT NETINFO Modules
*/
#if NETINFO
#define NETINFO_DEFAULT_DIR "/aliases"
#define NETINFO_DEFAULT_PROPERTY "members"
/*
** NI_MAP_OPEN -- open NetInfo Aliases
*/
bool
ni_map_open(map, mode)
MAP *map;
int mode;
{
char *p;
if (tTd(38, 20))
printf("ni_map_open: %s\n", map->map_file);
if (*map->map_file == '\0')
map->map_file = NETINFO_DEFAULT_DIR;
if (map->map_valcolnm == NULL)
map->map_valcolnm = NETINFO_DEFAULT_PROPERTY;
if (map->map_coldelim == '\0' && bitset(MF_ALIAS, map->map_mflags))
map->map_coldelim = ',';
return TRUE;
}
/*
** NI_MAP_LOOKUP -- look up a datum in NetInfo
*/
char *
ni_map_lookup(map, name, av, statp)
MAP *map;
char *name;
char **av;
int *statp;
{
char *res;
char *propval;
extern char *ni_propval();
if (tTd(38, 20))
printf("ni_map_lookup(%s, %s)\n",
map->map_mname, name);
propval = ni_propval(map->map_file, map->map_keycolnm, name,
map->map_valcolnm, map->map_coldelim);
if (propval == NULL)
return NULL;
if (bitset(MF_MATCHONLY, map->map_mflags))
res = map_rewrite(map, name, strlen(name), NULL);
else
res = map_rewrite(map, propval, strlen(propval), av);
free(propval);
return res;
}
#endif
\f/*
** TEXT (unindexed text file) Modules
**
** This code donated by Sun Microsystems.
*/
/*
** TEXT_MAP_OPEN -- open text table
*/
bool
text_map_open(map, mode)
MAP *map;
int mode;
{
struct stat sbuf;
if (tTd(38, 2))
printf("text_map_open(%s, %s, %d)\n",
map->map_mname, map->map_file, mode);
if (mode != O_RDONLY)
{
errno = ENODEV;
return FALSE;
}
if (*map->map_file == '\0')
{
if (tTd(38, 2))
printf("text_map_open: file name required\n");
return FALSE;
}
if (map->map_file[0] != '/')
{
if (tTd(38, 2))
printf("text_map_open(%s): file name must be fully qualified\n",
map->map_file);
return FALSE;
}
/* check to see if this map actually accessable */
if (access(map->map_file, R_OK) <0)
return FALSE;
/* check to see if this map actually exist */
if (stat(map->map_file, &sbuf) <0)
{
if (tTd(38, 2))
printf("text_map_open(%s): can not stat %s\n",
map->map_file, map->map_file);
return FALSE;
}
if (!S_ISREG(sbuf.st_mode))
{
if (tTd(38, 2))
printf("text_map_open(%s): %s is not a file\n",
map->map_file, map->map_file);
return FALSE;
}
if (map->map_keycolnm == NULL)
map->map_keycolno = 0;
else
{
if (!isdigit(*map->map_keycolnm))
{
if (tTd(38, 2))
printf("text_map_open(%s): -k should specify a number, not %s\n",
map->map_file, map->map_keycolnm);
return FALSE;
}
map->map_keycolno = atoi(map->map_keycolnm);
}
if (map->map_valcolnm == NULL)
map->map_valcolno = 0;
else
{
if (!isdigit(*map->map_valcolnm))
{
if (tTd(38, 2))
printf("text_map_open(%s): -v should specify a number, not %s\n",
map->map_file, map->map_valcolnm);
return FALSE;
}
map->map_valcolno = atoi(map->map_valcolnm);
}
if (tTd(38, 2))
{
printf("text_map_open(%s): delimiter = ",
map->map_file);
if (map->map_coldelim == '\0')
printf("(white space)\n");
else
printf("%c\n", map->map_coldelim);
}
return TRUE;
}
/*
** TEXT_MAP_LOOKUP -- look up a datum in a TEXT table
*/
char *
text_map_lookup(map, name, av, statp)
MAP *map;
char *name;
char **av;
int *statp;
{
char *vp;
auto int vsize;
int buflen;
char search_key[MAXNAME + 1];
char linebuf[MAXLINE];
FILE *f;
char buf[MAXNAME + 1];
char delim;
int key_idx;
bool found_it;
extern char *get_column();
found_it = FALSE;
if (tTd(38, 20))
printf("text_map_lookup(%s)\n", name);
buflen = strlen(name);
if (buflen > sizeof search_key - 1)
buflen = sizeof search_key - 1;
bcopy(name, search_key, buflen + 1);
if (!bitset(MF_NOFOLDCASE, map->map_mflags))
makelower(search_key);
f = fopen(map->map_file, "r");
if (f == NULL)
{
map->map_mflags &= ~(MF_VALID|MF_OPEN);
*statp = EX_UNAVAILABLE;
return NULL;
}
key_idx = map->map_keycolno;
delim = map->map_coldelim;
while (fgets(linebuf, MAXLINE, f))
{
char *lf;
if (linebuf[0] == '#')
continue; /* skip comment line */
if (lf = strchr(linebuf, '\n'))
*lf = '\0';
if (!strcasecmp(search_key,
get_column(linebuf, key_idx, delim, buf)))
{
found_it = TRUE;
break;
}
}
fclose(f);
if (!found_it)
{
#ifdef MAP_EXIT_STAT
*statp = EX_NOTFOUND;
#endif
return(NULL);
}
vp = get_column(linebuf, map->map_valcolno, delim, buf);
vsize = strlen(vp);
#ifdef MAP_EXIT_STAT
*statp = EX_OK;
#endif
if (bitset(MF_MATCHONLY, map->map_mflags))
return map_rewrite(map, name, strlen(name), NULL);
else
return map_rewrite(map, vp, vsize, av);
}
/*
** TEXT_GETCANONNAME -- look up canonical name in hosts file
*/
bool
text_getcanonname(name, hbsize, statp)
char *name;
int hbsize;
int *statp;
{
int key_idx;
bool found;
FILE *f;
char linebuf[MAXLINE];
char cbuf[MAXNAME + 1];
char fbuf[MAXNAME + 1];
char nbuf[MAXNAME + 1];
extern char *get_column();
if (strlen(name) >= sizeof nbuf)
{
*statp = EX_UNAVAILABLE;
return FALSE;
}
(void) strcpy(nbuf, name);
shorten_hostname(nbuf);
/* we only accept single token search key */
if (strchr(nbuf, '.') != NULL)
{
*statp = EX_NOHOST;
return FALSE;
}
found = FALSE;
f = fopen(HostsFile, "r");
if (f == NULL)
{
#ifdef MAP_EXIT_STAT
*statp = EX_UNAVAILABLE;
#endif
return FALSE;
}
while (!found && fgets(linebuf, MAXLINE, f) != NULL)
{
char *p;
if (linebuf[0] == '#')
continue;
if ((p = strchr(linebuf, '\n')) != NULL)
*p = '\0';
found = extract_canonname(nbuf, linebuf, cbuf);
}
fclose(f);
if (!found)
{
*statp = EX_NOHOST;
return FALSE;
}
if (hbsize >= strlen(cbuf))
{
strcpy(name, cbuf);
*statp = EX_OK;
return TRUE;
}
*statp = EX_UNAVAILABLE;
return FALSE;
}
\f/*
** STAB (Symbol Table) Modules
*/
/*
** STAB_MAP_LOOKUP -- look up alias in symbol table
*/
char *
stab_map_lookup(map, name, av, pstat)
register MAP *map;
char *name;
char **av;
int *pstat;
{
register STAB *s;
if (tTd(38, 20))
printf("stab_lookup(%s, %s)\n",
map->map_mname, name);
s = stab(name, ST_ALIAS, ST_FIND);
if (s != NULL)
return (s->s_alias);
return (NULL);
}
/*
** STAB_MAP_STORE -- store in symtab (actually using during init, not rebuild)
*/
void
stab_map_store(map, lhs, rhs)
register MAP *map;
char *lhs;
char *rhs;
{
register STAB *s;
s = stab(lhs, ST_ALIAS, ST_ENTER);
s->s_alias = newstr(rhs);
}
/*
** STAB_MAP_OPEN -- initialize (reads data file)
**
** This is a wierd case -- it is only intended as a fallback for
** aliases. For this reason, opens for write (only during a
** "newaliases") always fails, and opens for read open the
** actual underlying text file instead of the database.
*/
bool
stab_map_open(map, mode)
register MAP *map;
int mode;
{
FILE *af;
struct stat st;
if (tTd(38, 2))
printf("stab_map_open(%s, %s)\n",
map->map_mname, map->map_file);
if (mode != O_RDONLY)
{
errno = ENODEV;
return FALSE;
}
af = fopen(map->map_file, "r");
if (af == NULL)
return FALSE;
readaliases(map, af, FALSE, FALSE);
if (fstat(fileno(af), &st) >= 0)
map->map_mtime = st.st_mtime;
fclose(af);
return TRUE;
}
\f/*
** Implicit Modules
**
** Tries several types. For back compatibility of aliases.
*/
/*
** IMPL_MAP_LOOKUP -- lookup in best open database
*/
char *
impl_map_lookup(map, name, av, pstat)
MAP *map;
char *name;
char **av;
int *pstat;
{
if (tTd(38, 20))
printf("impl_map_lookup(%s, %s)\n",
map->map_mname, name);
#ifdef NEWDB
if (bitset(MF_IMPL_HASH, map->map_mflags))
return db_map_lookup(map, name, av, pstat);
#endif
#ifdef NDBM
if (bitset(MF_IMPL_NDBM, map->map_mflags))
return ndbm_map_lookup(map, name, av, pstat);
#endif
return stab_map_lookup(map, name, av, pstat);
}
/*
** IMPL_MAP_STORE -- store in open databases
*/
void
impl_map_store(map, lhs, rhs)
MAP *map;
char *lhs;
char *rhs;
{
#ifdef NEWDB
if (bitset(MF_IMPL_HASH, map->map_mflags))
db_map_store(map, lhs, rhs);
#endif
#ifdef NDBM
if (bitset(MF_IMPL_NDBM, map->map_mflags))
ndbm_map_store(map, lhs, rhs);
#endif
stab_map_store(map, lhs, rhs);
}
/*
** IMPL_MAP_OPEN -- implicit database open
*/
bool
impl_map_open(map, mode)
MAP *map;
int mode;
{
struct stat stb;
if (tTd(38, 2))
printf("impl_map_open(%s, %s, %d)\n",
map->map_mname, map->map_file, mode);
if (stat(map->map_file, &stb) < 0)
{
/* no alias file at all */
if (tTd(38, 3))
printf("no map file\n");
return FALSE;
}
#ifdef NEWDB
map->map_mflags |= MF_IMPL_HASH;
if (hash_map_open(map, mode))
{
#if defined(NDBM) && defined(NIS)
if (mode == O_RDONLY || strstr(map->map_file, "/yp/") == NULL)
#endif
return TRUE;
}
else
map->map_mflags &= ~MF_IMPL_HASH;
#endif
#ifdef NDBM
map->map_mflags |= MF_IMPL_NDBM;
if (ndbm_map_open(map, mode))
{
return TRUE;
}
else
map->map_mflags &= ~MF_IMPL_NDBM;
#endif
#if defined(NEWDB) || defined(NDBM)
if (Verbose)
message("WARNING: cannot open alias database %s", map->map_file);
#else
if (mode != O_RDONLY)
usrerr("Cannot rebuild aliases: no database format defined");
#endif
return stab_map_open(map, mode);
}
/*
** IMPL_MAP_CLOSE -- close any open database(s)
*/
void
impl_map_close(map)
MAP *map;
{
if (tTd(38, 20))
printf("impl_map_close(%s, %s, %x)\n",
map->map_mname, map->map_file, map->map_mflags);
#ifdef NEWDB
if (bitset(MF_IMPL_HASH, map->map_mflags))
{
db_map_close(map);
map->map_mflags &= ~MF_IMPL_HASH;
}
#endif
#ifdef NDBM
if (bitset(MF_IMPL_NDBM, map->map_mflags))
{
ndbm_map_close(map);
map->map_mflags &= ~MF_IMPL_NDBM;
}
#endif
}
\f/*
** User map class.
**
** Provides access to the system password file.
*/
/*
** USER_MAP_OPEN -- open user map
**
** Really just binds field names to field numbers.
*/
bool
user_map_open(map, mode)
MAP *map;
int mode;
{
if (tTd(38, 2))
printf("user_map_open(%s)\n", map->map_mname);
if (mode != O_RDONLY)
{
/* issue a pseudo-error message */
#ifdef ENOSYS
errno = ENOSYS;
#else
# ifdef EFTYPE
errno = EFTYPE;
# else
errno = ENXIO;
# endif
#endif
return FALSE;
}
if (map->map_valcolnm == NULL)
/* nothing */ ;
else if (strcasecmp(map->map_valcolnm, "name") == 0)
map->map_valcolno = 1;
else if (strcasecmp(map->map_valcolnm, "passwd") == 0)
map->map_valcolno = 2;
else if (strcasecmp(map->map_valcolnm, "uid") == 0)
map->map_valcolno = 3;
else if (strcasecmp(map->map_valcolnm, "gid") == 0)
map->map_valcolno = 4;
else if (strcasecmp(map->map_valcolnm, "gecos") == 0)
map->map_valcolno = 5;
else if (strcasecmp(map->map_valcolnm, "dir") == 0)
map->map_valcolno = 6;
else if (strcasecmp(map->map_valcolnm, "shell") == 0)
map->map_valcolno = 7;
else
{
syserr("User map %s: unknown column name %s",
map->map_mname, map->map_valcolnm);
return FALSE;
}
return TRUE;
}
/*
** USER_MAP_LOOKUP -- look up a user in the passwd file.
*/
char *
user_map_lookup(map, key, av, statp)
MAP *map;
char *key;
char **av;
int *statp;
{
struct passwd *pw;
if (tTd(38, 20))
printf("user_map_lookup(%s, %s)\n",
map->map_mname, key);
pw = sm_getpwnam(key);
if (pw == NULL)
return NULL;
if (bitset(MF_MATCHONLY, map->map_mflags))
return map_rewrite(map, key, strlen(key), NULL);
else
{
char *rwval = NULL;
char buf[30];
switch (map->map_valcolno)
{
case 0:
case 1:
rwval = pw->pw_name;
break;
case 2:
rwval = pw->pw_passwd;
break;
case 3:
sprintf(buf, "%d", pw->pw_uid);
rwval = buf;
break;
case 4:
sprintf(buf, "%d", pw->pw_gid);
rwval = buf;
break;
case 5:
rwval = pw->pw_gecos;
break;
case 6:
rwval = pw->pw_dir;
break;
case 7:
rwval = pw->pw_shell;
break;
}
return map_rewrite(map, rwval, strlen(rwval), av);
}
}
\f/*
** Program map type.
**
** This provides access to arbitrary programs. It should be used
** only very sparingly, since there is no way to bound the cost
** of invoking an arbitrary program.
*/
char *
prog_map_lookup(map, name, av, statp)
MAP *map;
char *name;
char **av;
int *statp;
{
int i;
register char *p;
int fd;
auto pid_t pid;
char *rval;
int stat;
char *argv[MAXPV + 1];
char buf[MAXLINE];
if (tTd(38, 20))
printf("prog_map_lookup(%s, %s) %s\n",
map->map_mname, name, map->map_file);
i = 0;
argv[i++] = map->map_file;
strcpy(buf, map->map_rebuild);
for (p = strtok(buf, " \t"); p != NULL; p = strtok(NULL, " \t"))
{
if (i >= MAXPV - 1)
break;
argv[i++] = p;
}
argv[i++] = name;
argv[i] = NULL;
pid = prog_open(argv, &fd, CurEnv);
if (pid < 0)
{
if (!bitset(MF_OPTIONAL, map->map_mflags))
syserr("prog_map_lookup(%s) failed (%s) -- closing",
map->map_mname, errstring(errno));
else if (tTd(38, 9))
printf("prog_map_lookup(%s) failed (%s) -- closing",
map->map_mname, errstring(errno));
map->map_mflags &= ~(MF_VALID|MF_OPEN);
*statp = EX_OSFILE;
return NULL;
}
i = read(fd, buf, sizeof buf - 1);
if (i < 0)
{
syserr("prog_map_lookup(%s): read error %s\n",
map->map_mname, errstring(errno));
rval = NULL;
}
else if (i == 0 && tTd(38, 2))
{
printf("prog_map_lookup(%s): empty answer\n",
map->map_mname);
rval = NULL;
}
if (i > 0)
{
buf[i] = '\0';
p = strchr(buf, '\n');
if (p != NULL)
*p = '\0';
/* collect the return value */
if (bitset(MF_MATCHONLY, map->map_mflags))
rval = map_rewrite(map, name, strlen(name), NULL);
else
rval = map_rewrite(map, buf, strlen(buf), NULL);
/* now flush any additional output */
while ((i = read(fd, buf, sizeof buf)) > 0)
continue;
}
/* wait for the process to terminate */
close(fd);
stat = waitfor(pid);
if (stat == -1)
{
syserr("prog_map_lookup(%s): wait error %s\n",
map->map_mname, errstring(errno));
*statp = EX_SOFTWARE;
rval = NULL;
}
else if (WIFEXITED(stat))
{
*statp = WEXITSTATUS(stat);
}
else
{
syserr("prog_map_lookup(%s): child died on signal %d",
map->map_mname, stat);
*statp = EX_UNAVAILABLE;
rval = NULL;
}
return rval;
}
\f/*
** Sequenced map type.
**
** Tries each map in order until something matches, much like
** implicit. Stores go to the first map in the list that can
** support storing.
**
** This is slightly unusual in that there are two interfaces.
** The "sequence" interface lets you stack maps arbitrarily.
** The "switch" interface builds a sequence map by looking
** at a system-dependent configuration file such as
** /etc/nsswitch.conf on Solaris or /etc/svc.conf on Ultrix.
**
** We don't need an explicit open, since all maps are
** opened during startup, including underlying maps.
*/
/*
** SEQ_MAP_PARSE -- Sequenced map parsing
*/
bool
seq_map_parse(map, ap)
MAP *map;
char *ap;
{
int maxmap;
if (tTd(38, 2))
printf("seq_map_parse(%s, %s)\n", map->map_mname, ap);
maxmap = 0;
while (*ap != '\0')
{
register char *p;
STAB *s;
/* find beginning of map name */
while (isascii(*ap) && isspace(*ap))
ap++;
for (p = ap; isascii(*p) && isalnum(*p); p++)
continue;
if (*p != '\0')
*p++ = '\0';
while (*p != '\0' && (!isascii(*p) || !isalnum(*p)))
p++;
if (*ap == '\0')
{
ap = p;
continue;
}
s = stab(ap, ST_MAP, ST_FIND);
if (s == NULL)
{
syserr("Sequence map %s: unknown member map %s",
map->map_mname, ap);
}
else if (maxmap == MAXMAPSTACK)
{
syserr("Sequence map %s: too many member maps (%d max)",
map->map_mname, MAXMAPSTACK);
maxmap++;
}
else if (maxmap < MAXMAPSTACK)
{
map->map_stack[maxmap++] = &s->s_map;
}
ap = p;
}
return TRUE;
}
/*
** SWITCH_MAP_OPEN -- open a switched map
**
** This looks at the system-dependent configuration and builds
** a sequence map that does the same thing.
**
** Every system must define a switch_map_find routine in conf.c
** that will return the list of service types associated with a
** given service class.
*/
bool
switch_map_open(map, mode)
MAP *map;
int mode;
{
int mapno;
int nmaps;
char *maptype[MAXMAPSTACK];
if (tTd(38, 2))
printf("switch_map_open(%s, %s, %d)\n",
map->map_mname, map->map_file, mode);
nmaps = switch_map_find(map->map_file, maptype, map->map_return);
if (tTd(38, 19))
{
printf("\tswitch_map_find => %d\n", nmaps);
for (mapno = 0; mapno < nmaps; mapno++)
printf("\t\t%s\n", maptype[mapno]);
}
if (nmaps <= 0 || nmaps > MAXMAPSTACK)
return FALSE;
for (mapno = 0; mapno < nmaps; mapno++)
{
register STAB *s;
char nbuf[MAXNAME + 1];
if (maptype[mapno] == NULL)
continue;
(void) sprintf(nbuf, "%s.%s", map->map_file, maptype[mapno]);
s = stab(nbuf, ST_MAP, ST_FIND);
if (s == NULL)
{
syserr("Switch map %s: unknown member map %s",
map->map_mname, nbuf);
}
else
{
map->map_stack[mapno] = &s->s_map;
if (tTd(38, 4))
printf("\tmap_stack[%d] = %s:%s\n",
mapno, s->s_map.map_class->map_cname,
nbuf);
}
}
return TRUE;
}
/*
** SEQ_MAP_CLOSE -- close all underlying maps
*/
void
seq_map_close(map)
MAP *map;
{
int mapno;
if (tTd(38, 20))
printf("seq_map_close(%s)\n", map->map_mname);
for (mapno = 0; mapno < MAXMAPSTACK; mapno++)
{
MAP *mm = map->map_stack[mapno];
if (mm == NULL || !bitset(MF_OPEN, mm->map_mflags))
continue;
mm->map_class->map_close(mm);
mm->map_mflags &= ~(MF_OPEN|MF_WRITABLE);
}
}
/*
** SEQ_MAP_LOOKUP -- sequenced map lookup
*/
char *
seq_map_lookup(map, key, args, pstat)
MAP *map;
char *key;
char **args;
int *pstat;
{
int mapno;
int mapbit = 0x01;
if (tTd(38, 20))
printf("seq_map_lookup(%s, %s)\n", map->map_mname, key);
for (mapno = 0; mapno < MAXMAPSTACK; mapbit <<= 1, mapno++)
{
MAP *mm = map->map_stack[mapno];
int stat = 0;
char *rv;
if (mm == NULL)
continue;
if (!bitset(MF_OPEN, mm->map_mflags))
{
if (bitset(mapbit, map->map_return[MA_UNAVAIL]))
{
*pstat = EX_UNAVAILABLE;
return NULL;
}
continue;
}
rv = mm->map_class->map_lookup(mm, key, args, &stat);
if (rv != NULL)
return rv;
if (stat == 0 && bitset(mapbit, map->map_return[MA_NOTFOUND]))
return NULL;
if (stat != 0 && bitset(mapbit, map->map_return[MA_TRYAGAIN]))
{
*pstat = stat;
return NULL;
}
}
return NULL;
}
/*
** SEQ_MAP_STORE -- sequenced map store
*/
void
seq_map_store(map, key, val)
MAP *map;
char *key;
char *val;
{
int mapno;
if (tTd(38, 12))
printf("seq_map_store(%s, %s, %s)\n",
map->map_mname, key, val);
for (mapno = 0; mapno < MAXMAPSTACK; mapno++)
{
MAP *mm = map->map_stack[mapno];
if (mm == NULL || !bitset(MF_WRITABLE, mm->map_mflags))
continue;
mm->map_class->map_store(mm, key, val);
return;
}
syserr("seq_map_store(%s, %s, %s): no writable map",
map->map_mname, key, val);
}
\f/*
** NULL stubs
*/
bool
null_map_open(map, mode)
MAP *map;
int mode;
{
return TRUE;
}
void
null_map_close(map)
MAP *map;
{
return;
}
void
null_map_store(map, key, val)
MAP *map;
char *key;
char *val;
{
return;
}
/*
** BOGUS stubs
*/
char *
bogus_map_lookup(map, key, args, pstat)
MAP *map;
char *key;
char **args;
int *pstat;
{
*pstat = EX_TEMPFAIL;
return NULL;
}
MAPCLASS BogusMapClass =
{
"bogus-map", NULL, 0,
NULL, bogus_map_lookup, null_map_store,
null_map_open, null_map_close,
};
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.