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 SDPS 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;
143 current.server.protocol = P_POP3;
144 current.server.sdps = TRUE;
146 | UIDL {current.server.uidl = FLAG_TRUE;}
147 | NO UIDL {current.server.uidl = FLAG_FALSE;}
148 | CHECKALIAS {current.server.checkalias = FLAG_TRUE;}
149 | NO CHECKALIAS {current.server.checkalias = FLAG_FALSE;}
152 current.server.service = $2;
157 current.server.port = $2;
160 | INTERVAL NUMBER {current.server.interval = $2;}
161 | AUTHENTICATE PASSWORD {current.server.preauthenticate = A_PASSWORD;}
162 | AUTHENTICATE KERBEROS4 {current.server.preauthenticate = A_KERBEROS_V4;}
163 | AUTHENTICATE KERBEROS5 {current.server.preauthenticate = A_KERBEROS_V5;}
164 | AUTHENTICATE KERBEROS {
166 current.server.preauthenticate = A_KERBEROS_V5;
168 current.server.preauthenticate = A_KERBEROS_V4;
169 #endif /* KERBEROS_V5 */
171 | TIMEOUT NUMBER {current.server.timeout = $2;}
173 | ENVELOPE NUMBER STRING
175 current.server.envelope =
177 current.server.envskip = $2;
181 current.server.envelope =
183 current.server.envskip = 0;
186 | QVIRTUAL STRING {current.server.qvirtual=xstrdup($2);}
192 if (net_security_strtorequest($2, &request, &requestlen))
193 yyerror("invalid security request");
195 current.server.netsec = xstrdup($2);
199 yyerror("network-security support disabled");
200 #endif /* NET_SECURITY */
203 #if defined(linux) && !defined(INET6)
204 interface_parse($2, ¤t.server);
205 #else /* defined(linux) && !defined(INET6) */
206 fprintf(stderr, "fetchmail: interface option is only supported under Linux\n");
207 #endif /* defined(linux) && !defined(INET6) */
210 #if defined(linux) && !defined(INET6)
211 current.server.monitor = xstrdup($2);
212 #else /* defined(linux) && !defined(INET6) */
213 fprintf(stderr, "fetchmail: monitor option is only supported under Linux\n");
214 #endif /* defined(linux) && !defined(INET6) */
216 | DNS {current.server.dns = FLAG_TRUE;}
217 | NO DNS {current.server.dns = FLAG_FALSE;}
218 | NO ENVELOPE {current.server.envelope = STRING_DISABLED;}
221 userspecs : user1opts {record_current(); user_reset();}
225 explicits : explicitdef {record_current(); user_reset();}
226 | explicits explicitdef {record_current(); user_reset();}
229 explicitdef : userdef user0opts
232 userdef : USERNAME STRING {current.remotename = xstrdup($2);}
233 | USERNAME mapping_list HERE
234 | USERNAME STRING THERE {current.remotename = xstrdup($2);}
237 user0opts : /* EMPTY */
238 | user0opts user_option
241 user1opts : user_option
242 | user1opts user_option
245 localnames : WILDCARD {current.wildcard = TRUE;}
246 | mapping_list {current.wildcard = FALSE;}
247 | mapping_list WILDCARD {current.wildcard = TRUE;}
250 mapping_list : mapping
251 | mapping_list mapping
255 {save_str_pair(¤t.localnames, $1, NULL);}
257 {save_str_pair(¤t.localnames, $1, $3);}
260 folder_list : STRING {save_str(¤t.mailboxes,$1,0);}
261 | folder_list STRING {save_str(¤t.mailboxes,$2,0);}
264 smtp_list : STRING {save_str(¤t.smtphunt, $1,TRUE);}
265 | smtp_list STRING {save_str(¤t.smtphunt, $2,TRUE);}
271 id=save_str(¤t.antispam,STRING_DUMMY,0);
272 id->val.status.num = $1;
277 id=save_str(¤t.antispam,STRING_DUMMY,0);
278 id->val.status.num = $2;
282 user_option : TO localnames HERE
287 | IS STRING THERE {current.remotename = xstrdup($2);}
288 | PASSWORD STRING {current.password = xstrdup($2);}
291 | SMTPADDRESS STRING {current.smtpaddress = xstrdup($2);}
292 | SPAMRESPONSE num_list
293 | MDA STRING {current.mda = xstrdup($2);}
294 | PRECONNECT STRING {current.preconnect = xstrdup($2);}
295 | POSTCONNECT STRING {current.postconnect = xstrdup($2);}
297 | KEEP {current.keep = FLAG_TRUE;}
298 | FLUSH {current.flush = FLAG_TRUE;}
299 | FETCHALL {current.fetchall = FLAG_TRUE;}
300 | REWRITE {current.rewrite = FLAG_TRUE;}
301 | FORCECR {current.forcecr = FLAG_TRUE;}
302 | STRIPCR {current.stripcr = FLAG_TRUE;}
303 | PASS8BITS {current.pass8bits = FLAG_TRUE;}
304 | DROPSTATUS {current.dropstatus = FLAG_TRUE;}
305 | MIMEDECODE {current.mimedecode = FLAG_TRUE;}
307 | NO KEEP {current.keep = FLAG_FALSE;}
308 | NO FLUSH {current.flush = FLAG_FALSE;}
309 | NO FETCHALL {current.fetchall = FLAG_FALSE;}
310 | NO REWRITE {current.rewrite = FLAG_FALSE;}
311 | NO FORCECR {current.forcecr = FLAG_FALSE;}
312 | NO STRIPCR {current.stripcr = FLAG_FALSE;}
313 | NO PASS8BITS {current.pass8bits = FLAG_FALSE;}
314 | NO DROPSTATUS {current.dropstatus = FLAG_FALSE;}
315 | NO MIMEDECODE {current.mimedecode = FLAG_FALSE;}
317 | LIMIT NUMBER {current.limit = NUM_VALUE($2);}
318 | FETCHLIMIT NUMBER {current.fetchlimit = NUM_VALUE($2);}
319 | BATCHLIMIT NUMBER {current.batchlimit = NUM_VALUE($2);}
320 | EXPUNGE NUMBER {current.expunge = NUM_VALUE($2);}
324 /* lexer interface */
326 extern int prc_lineno;
330 static struct query *hosttail; /* where to add new elements */
332 void yyerror (const char *s)
333 /* report a syntax error */
335 error_at_line( 0, 0, rcfile, prc_lineno, "%s at %s", s,
336 (yytext && yytext[0]) ? yytext : "end of input");
340 int prc_filecheck(const char *pathname, const flag securecheck)
341 /* check that a configuration file is secure */
348 /* special cases useful for debugging purposes */
349 if (strcmp("/dev/null", pathname) == 0)
352 /* the run control file must have the same uid as the REAL uid of this
353 process, it must have permissions no greater than 600, and it must not
354 be a symbolic link. We check these conditions here. */
356 if (lstat(pathname, &statbuf) < 0) {
360 error(0, errno, "lstat: %s", pathname);
365 if (!securecheck) return 0;
367 if ((statbuf.st_mode & S_IFLNK) == S_IFLNK)
369 fprintf(stderr, "File %s must not be a symbolic link.\n", pathname);
373 if (statbuf.st_mode & ~(S_IFREG | S_IREAD | S_IWRITE | S_IEXEC | S_IXGRP))
375 fprintf(stderr, "File %s must have no more than -rwx--x--- (0710) permissions.\n",
380 if (statbuf.st_uid != getuid())
382 fprintf(stderr, "File %s must be owned by you.\n", pathname);
389 int prc_parse_file (const char *pathname, const flag securecheck)
390 /* digest the configuration into a linked list of host records */
393 querylist = hosttail = (struct query *)NULL;
397 /* Check that the file is secure */
398 if ( (prc_errflag = prc_filecheck(pathname, securecheck)) != 0 )
404 /* Open the configuration and feed it to the lexer. */
405 if ((yyin = fopen(pathname,"r")) == (FILE *)NULL) {
406 error(0, errno, "open: %s", pathname);
410 yyparse(); /* parse entire file */
420 static void reset_server(char *name, int skip)
421 /* clear the entire global record and initialize it with a new name */
424 memset(¤t,'\0',sizeof(current));
425 current.smtp_socket = -1;
426 current.server.pollname = xstrdup(name);
427 current.server.skip = skip;
431 static void user_reset(void)
432 /* clear the global current record (user parameters) used by the parser */
434 struct hostdata save;
437 * Purpose of this code is to initialize the new server block, but
438 * preserve whatever server name was previously set. Also
439 * preserve server options unless the command-line explicitly
442 save = current.server;
444 memset(¤t, '\0', sizeof(current));
445 current.smtp_socket = -1;
447 current.server = save;
450 struct query *hostalloc(init)
451 /* append a host record to the host list */
452 struct query *init; /* pointer to block containing initial values */
456 /* allocate new node */
457 node = (struct query *) xmalloc(sizeof(struct query));
461 memcpy(node, init, sizeof(struct query));
464 memset(node, '\0', sizeof(struct query));
465 node->smtp_socket = -1;
468 /* append to end of list */
469 if (hosttail != (struct query *) 0)
470 hosttail->next = node; /* list contains at least one element */
472 querylist = node; /* list is empty */
476 node->server.lead_server = leadentry;
479 node->server.lead_server = NULL;
480 leadentry = &node->server;
486 static void record_current(void)
487 /* register current parameters and append to the host list */
489 (void) hostalloc(¤t);
493 /* easier to do this than cope with variations in where the library lives */
494 int yywrap(void) {return 1;}
496 /* rcfile_y.y ends here */