3 * rcfile_y.y -- Run control file parser for fetchmail
5 * For license terms, see the file COPYING in this directory.
10 #include <sys/types.h>
12 #if defined(HAVE_SYS_WAIT_H)
17 #if defined(STDC_HEADERS)
20 #if defined(HAVE_UNISTD_H)
26 #include <net/security.h>
27 #endif /* NET_SECURITY */
29 #include "fetchmail.h"
31 /* parser reads these */
32 char *rcfile; /* path name of rc file */
33 struct query cmd_opts; /* where to put command-line info */
35 /* parser sets these */
36 struct query *querylist; /* head of server list (globally visible) */
38 int yydebug; /* in case we didn't generate with -- debug */
40 static struct query current; /* current server record */
41 static int prc_errflag;
42 static struct hostdata *leadentry;
45 static void record_current();
46 static void user_reset();
47 static void reset_server(char *name, int skip);
49 /* using Bison, this arranges that yydebug messages will show actual tokens */
51 #define YYPRINT(fp, type, val) fprintf(fp, " = \"%s\"", yytext)
60 %token DEFAULTS POLL SKIP VIA AKA LOCALDOMAINS PROTOCOL
61 %token AUTHENTICATE TIMEOUT KPOP KERBEROS4 KERBEROS5 KERBEROS
62 %token ENVELOPE QVIRTUAL USERNAME PASSWORD FOLDER SMTPHOST MDA SMTPADDRESS
63 %token SPAMRESPONSE PRECONNECT POSTCONNECT LIMIT
64 %token NETSEC INTERFACE MONITOR
65 %token IS HERE THERE TO MAP WILDCARD
66 %token BATCHLIMIT FETCHLIMIT EXPUNGE
67 %token SET LOGFILE DAEMON SYSLOG IDFILE INVISIBLE POSTMASTER
70 %token <number> NUMBER
71 %token NO KEEP FLUSH FETCHALL REWRITE FORCECR STRIPCR PASS8BITS DROPSTATUS
72 %token DNS SERVICE PORT UIDL INTERVAL MIMEDECODE CHECKALIAS
80 statement_list : statement
81 | statement_list statement
84 optmap : MAP | /* EMPTY */;
86 /* future global options should also have the form SET <name> optmap <value> */
87 statement : SET LOGFILE optmap STRING {run.logfile = xstrdup($4);}
88 | SET IDFILE optmap STRING {run.idfile = xstrdup($4);}
89 | SET DAEMON optmap NUMBER {run.poll_interval = $4;}
90 | SET POSTMASTER optmap STRING {run.postmaster = xstrdup($4);}
91 | SET SYSLOG {run.use_syslog = TRUE;}
92 | SET INVISIBLE {run.invisible = TRUE;}
95 * The way the next two productions are written depends on the fact that
96 * userspecs cannot be empty. It's a kluge to deal with files that set
97 * up a load of defaults and then have poll statements following with no
98 * user options at all.
100 | define_server serverspecs {record_current();}
101 | define_server serverspecs userspecs
103 /* detect and complain about the most common user error */
104 | define_server serverspecs userspecs serv_option
105 {yyerror("server option after user options");}
108 define_server : POLL STRING {reset_server($2, FALSE);}
109 | SKIP STRING {reset_server($2, TRUE);}
110 | DEFAULTS {reset_server("defaults", FALSE);}
113 serverspecs : /* EMPTY */
114 | serverspecs serv_option
117 alias_list : STRING {save_str(¤t.server.akalist,$1,0);}
118 | alias_list STRING {save_str(¤t.server.akalist,$2,0);}
121 domain_list : STRING {save_str(¤t.server.localdomains,$1,0);}
122 | domain_list STRING {save_str(¤t.server.localdomains,$2,0);}
125 serv_option : AKA alias_list
126 | VIA STRING {current.server.via = xstrdup($2);}
127 | LOCALDOMAINS domain_list
128 | PROTOCOL PROTO {current.server.protocol = $2;}
130 current.server.protocol = P_POP3;
132 current.server.preauthenticate = A_KERBEROS_V5;
134 current.server.preauthenticate = A_KERBEROS_V4;
135 #endif /* KERBEROS_V5 */
137 current.server.service = KPOP_PORT;
139 current.server.port = KPOP_PORT;
142 | UIDL {current.server.uidl = FLAG_TRUE;}
143 | NO UIDL {current.server.uidl = FLAG_FALSE;}
144 | CHECKALIAS {current.server.checkalias = FLAG_TRUE;}
145 | NO CHECKALIAS {current.server.checkalias = FLAG_FALSE;}
148 current.server.service = $2;
153 current.server.port = $2;
156 | INTERVAL NUMBER {current.server.interval = $2;}
157 | AUTHENTICATE PASSWORD {current.server.preauthenticate = A_PASSWORD;}
158 | AUTHENTICATE KERBEROS4 {current.server.preauthenticate = A_KERBEROS_V4;}
159 | AUTHENTICATE KERBEROS5 {current.server.preauthenticate = A_KERBEROS_V5;}
160 | AUTHENTICATE KERBEROS {
162 current.server.preauthenticate = A_KERBEROS_V5;
164 current.server.preauthenticate = A_KERBEROS_V4;
165 #endif /* KERBEROS_V5 */
167 | TIMEOUT NUMBER {current.server.timeout = $2;}
169 | ENVELOPE NUMBER STRING
171 current.server.envelope =
173 current.server.envskip = $2;
177 current.server.envelope =
179 current.server.envskip = 0;
182 | QVIRTUAL STRING {current.server.qvirtual=xstrdup($2);}
188 if (net_security_strtorequest($2, &request, &requestlen))
189 yyerror("invalid security request");
191 current.server.netsec = xstrdup($2);
195 yyerror("network-security support disabled");
196 #endif /* NET_SECURITY */
199 #if defined(linux) && !defined(INET6)
200 interface_parse($2, ¤t.server);
201 #else /* defined(linux) && !defined(INET6) */
202 fprintf(stderr, "fetchmail: interface option is only supported under Linux\n");
203 #endif /* defined(linux) && !defined(INET6) */
206 #if defined(linux) && !defined(INET6)
207 current.server.monitor = xstrdup($2);
208 #else /* defined(linux) && !defined(INET6) */
209 fprintf(stderr, "fetchmail: monitor option is only supported under Linux\n");
210 #endif /* defined(linux) && !defined(INET6) */
212 | DNS {current.server.dns = FLAG_TRUE;}
213 | NO DNS {current.server.dns = FLAG_FALSE;}
214 | NO ENVELOPE {current.server.envelope = STRING_DISABLED;}
217 userspecs : user1opts {record_current(); user_reset();}
221 explicits : explicitdef {record_current(); user_reset();}
222 | explicits explicitdef {record_current(); user_reset();}
225 explicitdef : userdef user0opts
228 userdef : USERNAME STRING {current.remotename = xstrdup($2);}
229 | USERNAME mapping_list HERE
230 | USERNAME STRING THERE {current.remotename = xstrdup($2);}
233 user0opts : /* EMPTY */
234 | user0opts user_option
237 user1opts : user_option
238 | user1opts user_option
241 localnames : WILDCARD {current.wildcard = TRUE;}
242 | mapping_list {current.wildcard = FALSE;}
243 | mapping_list WILDCARD {current.wildcard = TRUE;}
246 mapping_list : mapping
247 | mapping_list mapping
251 {save_str_pair(¤t.localnames, $1, NULL);}
253 {save_str_pair(¤t.localnames, $1, $3);}
256 folder_list : STRING {save_str(¤t.mailboxes,$1,0);}
257 | folder_list STRING {save_str(¤t.mailboxes,$2,0);}
260 smtp_list : STRING {save_str(¤t.smtphunt, $1,TRUE);}
261 | smtp_list STRING {save_str(¤t.smtphunt, $2,TRUE);}
264 user_option : TO localnames HERE
269 | IS STRING THERE {current.remotename = xstrdup($2);}
270 | PASSWORD STRING {current.password = xstrdup($2);}
273 | SMTPADDRESS STRING {current.smtpaddress = xstrdup($2);}
274 | SPAMRESPONSE NUMBER {current.antispam = $2;}
275 | MDA STRING {current.mda = xstrdup($2);}
276 | PRECONNECT STRING {current.preconnect = xstrdup($2);}
277 | POSTCONNECT STRING {current.postconnect = xstrdup($2);}
279 | KEEP {current.keep = FLAG_TRUE;}
280 | FLUSH {current.flush = FLAG_TRUE;}
281 | FETCHALL {current.fetchall = FLAG_TRUE;}
282 | REWRITE {current.rewrite = FLAG_TRUE;}
283 | FORCECR {current.forcecr = FLAG_TRUE;}
284 | STRIPCR {current.stripcr = FLAG_TRUE;}
285 | PASS8BITS {current.pass8bits = FLAG_TRUE;}
286 | DROPSTATUS {current.dropstatus = FLAG_TRUE;}
287 | MIMEDECODE {current.mimedecode = FLAG_TRUE;}
289 | NO KEEP {current.keep = FLAG_FALSE;}
290 | NO FLUSH {current.flush = FLAG_FALSE;}
291 | NO FETCHALL {current.fetchall = FLAG_FALSE;}
292 | NO REWRITE {current.rewrite = FLAG_FALSE;}
293 | NO FORCECR {current.forcecr = FLAG_FALSE;}
294 | NO STRIPCR {current.stripcr = FLAG_FALSE;}
295 | NO PASS8BITS {current.pass8bits = FLAG_FALSE;}
296 | NO DROPSTATUS {current.dropstatus = FLAG_FALSE;}
297 | NO MIMEDECODE {current.mimedecode = FLAG_FALSE;}
299 | LIMIT NUMBER {current.limit = NUM_VALUE($2);}
300 | FETCHLIMIT NUMBER {current.fetchlimit = NUM_VALUE($2);}
301 | BATCHLIMIT NUMBER {current.batchlimit = NUM_VALUE($2);}
302 | EXPUNGE NUMBER {current.expunge = NUM_VALUE($2);}
306 /* lexer interface */
308 extern int prc_lineno;
312 static struct query *hosttail; /* where to add new elements */
314 void yyerror (const char *s)
315 /* report a syntax error */
317 error_at_line( 0, 0, rcfile, prc_lineno, "%s at %s", s,
318 (yytext && yytext[0]) ? yytext : "end of input");
322 int prc_filecheck(pathname, securecheck)
323 /* check that a configuration file is secure */
324 const char *pathname; /* pathname for the configuration file */
325 const flag securecheck;
332 /* special cases useful for debugging purposes */
333 if (strcmp("/dev/null", pathname) == 0)
336 /* the run control file must have the same uid as the REAL uid of this
337 process, it must have permissions no greater than 600, and it must not
338 be a symbolic link. We check these conditions here. */
340 if (lstat(pathname, &statbuf) < 0) {
344 error(0, errno, "lstat: %s", pathname);
349 if (!securecheck) return 0;
351 if ((statbuf.st_mode & S_IFLNK) == S_IFLNK)
353 fprintf(stderr, "File %s must not be a symbolic link.\n", pathname);
357 if (statbuf.st_mode & ~(S_IFREG | S_IREAD | S_IWRITE | S_IEXEC | S_IXGRP))
359 fprintf(stderr, "File %s must have no more than -rwx--x--- (0710) permissions.\n",
364 if (statbuf.st_uid != getuid())
366 fprintf(stderr, "File %s must be owned by you.\n", pathname);
373 int prc_parse_file (const char *pathname, const flag securecheck)
374 /* digest the configuration into a linked list of host records */
377 querylist = hosttail = (struct query *)NULL;
381 /* Check that the file is secure */
382 if ( (prc_errflag = prc_filecheck(pathname, securecheck)) != 0 )
388 /* Open the configuration and feed it to the lexer. */
389 if ((yyin = fopen(pathname,"r")) == (FILE *)NULL) {
390 error(0, errno, "open: %s", pathname);
394 yyparse(); /* parse entire file */
404 static void reset_server(char *name, int skip)
405 /* clear the entire global record and initialize it with a new name */
408 memset(¤t,'\0',sizeof(current));
409 current.smtp_socket = -1;
410 current.server.pollname = xstrdup(name);
411 current.server.skip = skip;
415 static void user_reset(void)
416 /* clear the global current record (user parameters) used by the parser */
418 struct hostdata save;
421 * Purpose of this code is to initialize the new server block, but
422 * preserve whatever server name was previously set. Also
423 * preserve server options unless the command-line explicitly
426 save = current.server;
428 memset(¤t, '\0', sizeof(current));
429 current.smtp_socket = -1;
431 current.server = save;
434 struct query *hostalloc(init)
435 /* append a host record to the host list */
436 struct query *init; /* pointer to block containing initial values */
440 /* allocate new node */
441 node = (struct query *) xmalloc(sizeof(struct query));
445 memcpy(node, init, sizeof(struct query));
448 memset(node, '\0', sizeof(struct query));
449 node->smtp_socket = -1;
452 /* append to end of list */
453 if (hosttail != (struct query *) 0)
454 hosttail->next = node; /* list contains at least one element */
456 querylist = node; /* list is empty */
460 node->server.lead_server = leadentry;
463 node->server.lead_server = NULL;
464 leadentry = &node->server;
470 static void record_current(void)
471 /* register current parameters and append to the host list */
473 (void) hostalloc(¤t);
477 /* easier to do this than cope with variations in where the library lives */
478 int yywrap(void) {return 1;}
480 /* rcfile_y.y ends here */