Pileus Git - ~andy/fetchmail/blob - rcfile_y.y

   1 %{
   2 /*
   3  * rcfile_y.y -- Run control file parser for fetchmail
   4  *
   5  * For license terms, see the file COPYING in this directory.
   6  */
   7
   8 #include "config.h"
   9 #include <stdio.h>
  10 #include <sys/types.h>
  11 #include <sys/file.h>
  12 #if defined(HAVE_SYS_WAIT_H)
  13 #include <sys/wait.h>
  14 #endif
  15 #include <sys/stat.h>
  16 #include <errno.h>
  17 #if defined(STDC_HEADERS)
  18 #include <stdlib.h>
  19 #endif
  20 #if defined(HAVE_UNISTD_H)
  21 #include <unistd.h>
  22 #endif
  23 #include <string.h>
  24
  25 #if defined(__CYGWIN__)
  26 #include <sys/cygwin.h>
  27 #endif /* __CYGWIN__ */
  28
  29 #include "fetchmail.h"
  30 #include "i18n.h"
  31
  32 /* parser reads these */
  33 char *rcfile;                   /* path name of rc file */
  34 struct query cmd_opts;          /* where to put command-line info */
  35
  36 /* parser sets these */
  37 struct query *querylist;        /* head of server list (globally visible) */
  38
  39 int yydebug;                    /* in case we didn't generate with -- debug */
  40
  41 static struct query current;    /* current server record */
  42 static int prc_errflag;
  43 static struct hostdata *leadentry;
  44 static flag trailer;
  45
  46 static void record_current(void);
  47 static void user_reset(void);
  48 static void reset_server(const char *name, int skip);
  49
  50 /* these should be of size PATH_MAX */
  51 char currentwd[1024] = "", rcfiledir[1024] = "";
  52
  53 /* using Bison, this arranges that yydebug messages will show actual tokens */
  54 extern char * yytext;
  55 #define YYPRINT(fp, type, val)  fprintf(fp, " = \"%s\"", yytext)
  56 %}
  57
  58 %union {
  59   int proto;
  60   int number;
  61   char *sval;
  62 }
  63
  64 %token DEFAULTS POLL SKIP VIA AKA LOCALDOMAINS PROTOCOL
  65 %token AUTHENTICATE TIMEOUT KPOP SDPS ENVELOPE QVIRTUAL
  66 %token USERNAME PASSWORD FOLDER SMTPHOST FETCHDOMAINS MDA BSMTP LMTP
  67 %token SMTPADDRESS SMTPNAME SPAMRESPONSE PRECONNECT POSTCONNECT LIMIT WARNINGS
  68 %token INTERFACE MONITOR PLUGIN PLUGOUT
  69 %token IS HERE THERE TO MAP
  70 %token BATCHLIMIT FETCHLIMIT FETCHSIZELIMIT FASTUIDL EXPUNGE PROPERTIES
  71 %token SET LOGFILE DAEMON SYSLOG IDFILE PIDFILE INVISIBLE POSTMASTER BOUNCEMAIL
  72 %token SPAMBOUNCE SOFTBOUNCE SHOWDOTS
  73 %token BADHEADER ACCEPT REJECT_
  74 %token <proto> PROTO AUTHTYPE
  75 %token <sval>  STRING
  76 %token <number> NUMBER
  77 %token NO KEEP FLUSH LIMITFLUSH FETCHALL REWRITE FORCECR STRIPCR PASS8BITS
  78 %token DROPSTATUS DROPDELIVERED
  79 %token DNS SERVICE PORT UIDL INTERVAL MIMEDECODE IDLE CHECKALIAS
  80 %token SSL SSLKEY SSLCERT SSLPROTO SSLCERTCK SSLCERTFILE SSLCERTPATH SSLCOMMONNAME SSLFINGERPRINT
  81 %token PRINCIPAL ESMTPNAME ESMTPPASSWORD
  82 %token TRACEPOLLS
  83
  84 %expect 2
  85
  86 %destructor { free ($$); } STRING
  87
  88 %%
  89
  90 rcfile          : /* empty */
  91                 | statement_list
  92                 ;
  93
  94 statement_list  : statement
  95                 | statement_list statement
  96                 ;
  97
  98 optmap          : MAP | /* EMPTY */;
  99
 100 /* future global options should also have the form SET <name> optmap <value> */
 101 statement       : SET LOGFILE optmap STRING     {run.logfile = prependdir ($4, rcfiledir); free($4);}
 102                 | SET IDFILE optmap STRING      {run.idfile = prependdir ($4, rcfiledir); free($4);}
 103                 | SET PIDFILE optmap STRING     {run.pidfile = prependdir ($4, rcfiledir); free($4);}
 104                 | SET DAEMON optmap NUMBER      {run.poll_interval = $4;}
 105                 | SET POSTMASTER optmap STRING  {run.postmaster = $4;}
 106                 | SET BOUNCEMAIL                {run.bouncemail = TRUE;}
 107                 | SET NO BOUNCEMAIL             {run.bouncemail = FALSE;}
 108                 | SET SPAMBOUNCE                {run.spambounce = TRUE;}
 109                 | SET NO SPAMBOUNCE             {run.spambounce = FALSE;}
 110                 | SET SOFTBOUNCE                {run.softbounce = TRUE;}
 111                 | SET NO SOFTBOUNCE             {run.softbounce = FALSE;}
 112                 | SET PROPERTIES optmap STRING  {run.properties = $4;}
 113                 | SET SYSLOG                    {run.use_syslog = TRUE;}
 114                 | SET NO SYSLOG                 {run.use_syslog = FALSE;}
 115                 | SET INVISIBLE                 {run.invisible = TRUE;}
 116                 | SET NO INVISIBLE              {run.invisible = FALSE;}
 117                 | SET SHOWDOTS                  {run.showdots = FLAG_TRUE;}
 118                 | SET NO SHOWDOTS               {run.showdots = FLAG_FALSE;}
 119
 120 /*
 121  * The way the next two productions are written depends on the fact that
 122  * userspecs cannot be empty.  It's a kluge to deal with files that set
 123  * up a load of defaults and then have poll statements following with no
 124  * user options at all.
 125  */
 126                 | define_server serverspecs             {record_current();}
 127                 | define_server serverspecs userspecs
 128
 129 /* detect and complain about the most common user error */
 130                 | define_server serverspecs userspecs serv_option
 131                         {yyerror(GT_("server option after user options"));}
 132                 ;
 133
 134 define_server   : POLL STRING           {reset_server($2, FALSE); free($2);}
 135                 | SKIP STRING           {reset_server($2, TRUE);  free($2);}
 136                 | DEFAULTS              {reset_server("defaults", FALSE);}
 137                 ;
 138
 139 serverspecs     : /* EMPTY */
 140                 | serverspecs serv_option
 141                 ;
 142
 143 alias_list      : STRING                {save_str(&current.server.akalist,$1,0); free($1);}
 144                 | alias_list STRING     {save_str(&current.server.akalist,$2,0); free($2);}
 145                 ;
 146
 147 domain_list     : STRING                {save_str(&current.server.localdomains,$1,0); free($1);}
 148                 | domain_list STRING    {save_str(&current.server.localdomains,$2,0); free($2);}
 149                 ;
 150
 151 serv_option     : AKA alias_list
 152                 | VIA STRING            {current.server.via = $2;}
 153                 | LOCALDOMAINS domain_list
 154                 | PROTOCOL PROTO        {current.server.protocol = $2;}
 155                 | PROTOCOL KPOP         {
 156                                             current.server.protocol = P_POP3;
 157
 158                                             if (current.server.authenticate == A_PASSWORD)
 159 #ifdef KERBEROS_V5
 160                                                 current.server.authenticate = A_KERBEROS_V5;
 161 #else
 162                                                 current.server.authenticate = A_KERBEROS_V4;
 163 #endif /* KERBEROS_V5 */
 164                                             current.server.service = KPOP_PORT;
 165                                         }
 166                 | PRINCIPAL STRING      {current.server.principal = $2;}
 167                 | ESMTPNAME STRING      {current.server.esmtp_name = $2;}
 168                 | ESMTPPASSWORD STRING  {current.server.esmtp_password = $2;}
 169                 | PROTOCOL SDPS         {
 170 #ifdef SDPS_ENABLE
 171                                             current.server.protocol = P_POP3;
 172                                             current.server.sdps = TRUE;
 173 #else
 174                                             yyerror(GT_("SDPS not enabled."));
 175 #endif /* SDPS_ENABLE */
 176                                         }
 177                 | UIDL                  {current.server.uidl = FLAG_TRUE;}
 178                 | NO UIDL               {current.server.uidl  = FLAG_FALSE;}
 179                 | CHECKALIAS            {current.server.checkalias = FLAG_TRUE;}
 180                 | NO CHECKALIAS         {current.server.checkalias  = FLAG_FALSE;}
 181                 | SERVICE STRING        {
 182                                         current.server.service = $2;
 183                                         }
 184                 | SERVICE NUMBER        {
 185                                         int port = $2;
 186                                         char buf[10];
 187                                         snprintf(buf, sizeof buf, "%d", port);
 188                                         current.server.service = xstrdup(buf);
 189                 }
 190                 | PORT NUMBER           {
 191                                         int port = $2;
 192                                         char buf[10];
 193                                         snprintf(buf, sizeof buf, "%d", port);
 194                                         current.server.service = xstrdup(buf);
 195                 }
 196                 | INTERVAL NUMBER
 197                         {current.server.interval = $2;}
 198                 | AUTHENTICATE AUTHTYPE
 199                         {current.server.authenticate = $2;}
 200                 | TIMEOUT NUMBER
 201                         {current.server.timeout = $2;}
 202                 | ENVELOPE NUMBER STRING
 203                                         {
 204                                             current.server.envelope = $3;
 205                                             current.server.envskip = $2;
 206                                         }
 207                 | ENVELOPE STRING
 208                                         {
 209                                             current.server.envelope = $2;
 210                                             current.server.envskip = 0;
 211                                         }
 212
 213                 | QVIRTUAL STRING       {current.server.qvirtual = $2;}
 214                 | INTERFACE STRING      {
 215 #ifdef CAN_MONITOR
 216                                         interface_parse($2, &current.server);
 217 #else
 218                                         fprintf(stderr, GT_("fetchmail: interface option is only supported under Linux (without IPv6) and FreeBSD\n"));
 219 #endif
 220                                         free($2);
 221                                         }
 222                 | MONITOR STRING        {
 223 #ifdef CAN_MONITOR
 224                                         current.server.monitor = $2;
 225 #else
 226                                         fprintf(stderr, GT_("fetchmail: monitor option is only supported under Linux (without IPv6) and FreeBSD\n"));
 227                                         free($2);
 228 #endif
 229                                         }
 230                 | PLUGIN STRING         { current.server.plugin = $2; }
 231                 | PLUGOUT STRING        { current.server.plugout = $2; }
 232                 | DNS                   {current.server.dns = FLAG_TRUE;}
 233                 | NO DNS                {current.server.dns = FLAG_FALSE;}
 234                 | NO ENVELOPE           {current.server.envelope = STRING_DISABLED;}
 235                 | TRACEPOLLS            {current.server.tracepolls = FLAG_TRUE;}
 236                 | NO TRACEPOLLS         {current.server.tracepolls = FLAG_FALSE;}
 237                 | BADHEADER ACCEPT      {current.server.badheader = BHACCEPT;}
 238                 | BADHEADER REJECT_     {current.server.badheader = BHREJECT;}
 239                 ;
 240
 241 userspecs       : user1opts             {record_current(); user_reset();}
 242                 | explicits
 243                 ;
 244
 245 explicits       : explicitdef           {record_current(); user_reset();}
 246                 | explicits explicitdef {record_current(); user_reset();}
 247                 ;
 248
 249 explicitdef     : userdef user0opts
 250                 ;
 251
 252 userdef         : USERNAME STRING       {current.remotename = $2;}
 253                 | USERNAME mapping_list HERE
 254                 | USERNAME STRING THERE {current.remotename = $2;}
 255                 ;
 256
 257 user0opts       : /* EMPTY */
 258                 | user0opts user_option
 259                 ;
 260
 261 user1opts       : user_option
 262                 | user1opts user_option
 263                 ;
 264
 265 mapping_list    : mapping
 266                 | mapping_list mapping
 267                 ;
 268
 269 mapping         : STRING                {if (0 == strcmp($1, "*")) {
 270                                               current.wildcard = TRUE;
 271                                           } else {
 272                                             save_str_pair(&current.localnames, $1, NULL);
 273                                           }
 274                                          free($1);}
 275                 | STRING MAP STRING     {save_str_pair(&current.localnames, $1, $3); free($1); free($3);}
 276                 ;
 277
 278 folder_list     : STRING                {save_str(&current.mailboxes,$1,0); free($1);}
 279                 | folder_list STRING    {save_str(&current.mailboxes,$2,0); free($2);}
 280                 ;
 281
 282 smtp_list       : STRING                {save_str(&current.smtphunt, $1,TRUE); free($1);}
 283                 | smtp_list STRING      {save_str(&current.smtphunt, $2,TRUE); free($2);}
 284                 ;
 285
 286 fetch_list      : STRING                {save_str(&current.domainlist, $1,TRUE); free($1);}
 287                 | fetch_list STRING     {save_str(&current.domainlist, $2,TRUE); free($2);}
 288                 ;
 289
 290 num_list        : NUMBER
 291                         {
 292                             struct idlist *id;
 293                             id = save_str(&current.antispam,STRING_DUMMY,0);
 294                             id->val.status.num = $1;
 295                         }
 296                 | num_list NUMBER
 297                         {
 298                             struct idlist *id;
 299                             id = save_str(&current.antispam,STRING_DUMMY,0);
 300                             id->val.status.num = $2;
 301                         }
 302                 ;
 303
 304 user_option     : TO mapping_list HERE
 305                 | TO mapping_list
 306                 | IS mapping_list HERE
 307                 | IS mapping_list
 308
 309                 | IS STRING THERE       {current.remotename  = $2;}
 310                 | PASSWORD STRING       {current.password    = $2;}
 311                 | FOLDER folder_list
 312                 | SMTPHOST smtp_list
 313                 | FETCHDOMAINS fetch_list
 314                 | SMTPADDRESS STRING    {current.smtpaddress = $2;}
 315                 | SMTPNAME STRING       {current.smtpname =    $2;}
 316                 | SPAMRESPONSE num_list
 317                 | MDA STRING            {current.mda         = $2;}
 318                 | BSMTP STRING          {current.bsmtp       = prependdir ($2, rcfiledir); free($2);}
 319                 | LMTP                  {current.listener    = LMTP_MODE;}
 320                 | PRECONNECT STRING     {current.preconnect  = $2;}
 321                 | POSTCONNECT STRING    {current.postconnect = $2;}
 322
 323                 | KEEP                  {current.keep        = FLAG_TRUE;}
 324                 | FLUSH                 {current.flush       = FLAG_TRUE;}
 325                 | LIMITFLUSH            {current.limitflush  = FLAG_TRUE;}
 326                 | FETCHALL              {current.fetchall    = FLAG_TRUE;}
 327                 | REWRITE               {current.rewrite     = FLAG_TRUE;}
 328                 | FORCECR               {current.forcecr     = FLAG_TRUE;}
 329                 | STRIPCR               {current.stripcr     = FLAG_TRUE;}
 330                 | PASS8BITS             {current.pass8bits   = FLAG_TRUE;}
 331                 | DROPSTATUS            {current.dropstatus  = FLAG_TRUE;}
 332                 | DROPDELIVERED         {current.dropdelivered = FLAG_TRUE;}
 333                 | MIMEDECODE            {current.mimedecode  = FLAG_TRUE;}
 334                 | IDLE                  {current.idle        = FLAG_TRUE;}
 335
 336                 | SSL                   {
 337 #ifdef SSL_ENABLE
 338                     current.use_ssl = FLAG_TRUE;
 339 #else
 340                     yyerror(GT_("SSL is not enabled"));
 341 #endif
 342                 }
 343                 | SSLKEY STRING         {current.sslkey = prependdir ($2, rcfiledir); free($2);}
 344                 | SSLCERT STRING        {current.sslcert = prependdir ($2, rcfiledir); free($2);}
 345                 | SSLPROTO STRING       {current.sslproto = $2;}
 346                 | SSLCERTCK             {current.sslcertck = FLAG_TRUE;}
 347                 | SSLCERTFILE STRING    {current.sslcertfile = prependdir($2, rcfiledir); free($2);}
 348                 | SSLCERTPATH STRING    {current.sslcertpath = prependdir($2, rcfiledir); free($2);}
 349                 | SSLCOMMONNAME STRING  {current.sslcommonname = $2;}
 350                 | SSLFINGERPRINT STRING {current.sslfingerprint = $2;}
 351
 352                 | NO KEEP               {current.keep        = FLAG_FALSE;}
 353                 | NO FLUSH              {current.flush       = FLAG_FALSE;}
 354                 | NO LIMITFLUSH         {current.limitflush  = FLAG_FALSE;}
 355                 | NO FETCHALL           {current.fetchall    = FLAG_FALSE;}
 356                 | NO REWRITE            {current.rewrite     = FLAG_FALSE;}
 357                 | NO FORCECR            {current.forcecr     = FLAG_FALSE;}
 358                 | NO STRIPCR            {current.stripcr     = FLAG_FALSE;}
 359                 | NO PASS8BITS          {current.pass8bits   = FLAG_FALSE;}
 360                 | NO DROPSTATUS         {current.dropstatus  = FLAG_FALSE;}
 361                 | NO DROPDELIVERED      {current.dropdelivered = FLAG_FALSE;}
 362                 | NO MIMEDECODE         {current.mimedecode  = FLAG_FALSE;}
 363                 | NO IDLE               {current.idle        = FLAG_FALSE;}
 364
 365                 | NO SSL                {current.use_ssl     = FLAG_FALSE;}
 366
 367                 | LIMIT NUMBER          {current.limit       = NUM_VALUE_IN($2);}
 368                 | WARNINGS NUMBER       {current.warnings    = NUM_VALUE_IN($2);}
 369                 | FETCHLIMIT NUMBER     {current.fetchlimit  = NUM_VALUE_IN($2);}
 370                 | FETCHSIZELIMIT NUMBER {current.fetchsizelimit = NUM_VALUE_IN($2);}
 371                 | FASTUIDL NUMBER       {current.fastuidl    = NUM_VALUE_IN($2);}
 372                 | BATCHLIMIT NUMBER     {current.batchlimit  = NUM_VALUE_IN($2);}
 373                 | EXPUNGE NUMBER        {current.expunge     = NUM_VALUE_IN($2);}
 374
 375                 | PROPERTIES STRING     {current.properties  = $2;}
 376                 ;
 377 %%
 378
 379 /* lexer interface */
 380 extern char *rcfile;
 381 extern int prc_lineno;
 382 extern char *yytext;
 383 extern FILE *yyin;
 384
 385 static struct query *hosttail;  /* where to add new elements */
 386
 387 void yyerror (const char *s)
 388 /* report a syntax error */
 389 {
 390     report_at_line(stderr, 0, rcfile, prc_lineno, GT_("%s at %s"), s,
 391                    (yytext && yytext[0]) ? yytext : GT_("end of input"));
 392     prc_errflag++;
 393 }
 394
 395 /** check that a configuration file is secure, returns PS_* status codes */
 396 int prc_filecheck(const char *pathname,
 397                   const flag securecheck /** shortcuts permission, filetype and uid tests if false */)
 398 {
 399 #ifndef __EMX__
 400     struct stat statbuf;
 401
 402     errno = 0;
 403
 404     /* special case useful for debugging purposes */
 405     if (strcmp("/dev/null", pathname) == 0)
 406         return(PS_SUCCESS);
 407
 408     /* pass through the special name for stdin */
 409     if (strcmp("-", pathname) == 0)
 410         return(PS_SUCCESS);
 411
 412     /* the run control file must have the same uid as the REAL uid of this
 413        process, it must have permissions no greater than 600, and it must not
 414        be a symbolic link.  We check these conditions here. */
 415
 416     if (stat(pathname, &statbuf) < 0) {
 417         if (errno == ENOENT)
 418             return(PS_SUCCESS);
 419         else {
 420             report(stderr, "lstat: %s: %s\n", pathname, strerror(errno));
 421             return(PS_IOERR);
 422         }
 423     }
 424
 425     if (!securecheck)   return PS_SUCCESS;
 426
 427     if (!S_ISREG(statbuf.st_mode))
 428     {
 429         fprintf(stderr, GT_("File %s must be a regular file.\n"), pathname);
 430         return(PS_IOERR);
 431     }
 432
 433 #ifndef __BEOS__
 434 #ifdef __CYGWIN__
 435     if (cygwin_internal(CW_CHECK_NTSEC, pathname))
 436 #endif /* __CYGWIN__ */
 437     if (statbuf.st_mode & (S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH | S_IXOTH))
 438     {
 439         fprintf(stderr, GT_("File %s must have no more than -rwx------ (0700) permissions.\n"),
 440                 pathname);
 441         return(PS_IOERR);
 442     }
 443 #endif /* __BEOS__ */
 444
 445 #ifdef HAVE_GETEUID
 446     if (statbuf.st_uid != geteuid())
 447 #else
 448     if (statbuf.st_uid != getuid())
 449 #endif /* HAVE_GETEUID */
 450     {
 451         fprintf(stderr, GT_("File %s must be owned by you.\n"), pathname);
 452         return(PS_IOERR);
 453     }
 454 #endif
 455     return(PS_SUCCESS);
 456 }
 457
 458 int prc_parse_file (const char *pathname, const flag securecheck)
 459 /* digest the configuration into a linked list of host records */
 460 {
 461     prc_errflag = 0;
 462     querylist = hosttail = (struct query *)NULL;
 463
 464     errno = 0;
 465
 466     /* Check that the file is secure */
 467     if ( (prc_errflag = prc_filecheck(pathname, securecheck)) != 0 )
 468         return(prc_errflag);
 469
 470     /*
 471      * Croak if the configuration directory does not exist.
 472      * This probably means an NFS mount failed and we can't
 473      * see a configuration file that ought to be there.
 474      * Question: is this a portable check? It's not clear
 475      * that all implementations of lstat() will return ENOTDIR
 476      * rather than plain ENOENT in this case...
 477      */
 478     if (errno == ENOTDIR)
 479         return(PS_IOERR);
 480     else if (errno == ENOENT)
 481         return(PS_SUCCESS);
 482
 483     /* Open the configuration file and feed it to the lexer. */
 484     if (strcmp(pathname, "-") == 0)
 485         yyin = stdin;
 486     else if ((yyin = fopen(pathname,"r")) == (FILE *)NULL) {
 487         report(stderr, "open: %s: %s\n", pathname, strerror(errno));
 488         return(PS_IOERR);
 489     }
 490
 491     yyparse();          /* parse entire file */
 492
 493     fclose(yyin);       /* not checking this should be safe, file mode was r */
 494
 495     if (prc_errflag)
 496         return(PS_SYNTAX);
 497     else
 498         return(PS_SUCCESS);
 499 }
 500
 501 static void reset_server(const char *name, int skip)
 502 /* clear the entire global record and initialize it with a new name */
 503 {
 504     trailer = FALSE;
 505     memset(&current,'\0',sizeof(current));
 506     current.smtp_socket = -1;
 507     current.server.pollname = xstrdup(name);
 508     current.server.skip = skip;
 509     current.server.principal = (char *)NULL;
 510 }
 511
 512
 513 static void user_reset(void)
 514 /* clear the global current record (user parameters) used by the parser */
 515 {
 516     struct hostdata save;
 517
 518     /*
 519      * Purpose of this code is to initialize the new server block, but
 520      * preserve whatever server name was previously set.  Also
 521      * preserve server options unless the command-line explicitly
 522      * overrides them.
 523      */
 524     save = current.server;
 525
 526     memset(&current, '\0', sizeof(current));
 527     current.smtp_socket = -1;
 528
 529     current.server = save;
 530 }
 531
 532 /** append a host record to the host list */
 533 struct query *hostalloc(struct query *init /** pointer to block containing
 534                                                initial values */)
 535 {
 536     struct query *node;
 537
 538     /* allocate new node */
 539     node = (struct query *) xmalloc(sizeof(struct query));
 540
 541     /* initialize it */
 542     if (init)
 543         memcpy(node, init, sizeof(struct query));
 544     else
 545     {
 546         memset(node, '\0', sizeof(struct query));
 547         node->smtp_socket = -1;
 548     }
 549
 550     /* append to end of list */
 551     if (hosttail != (struct query *) 0)
 552         hosttail->next = node;  /* list contains at least one element */
 553     else
 554         querylist = node;       /* list is empty */
 555     hosttail = node;
 556
 557     if (trailer)
 558         node->server.lead_server = leadentry;
 559     else
 560     {
 561         node->server.lead_server = NULL;
 562         leadentry = &node->server;
 563     }
 564
 565     return(node);
 566 }
 567
 568 static void record_current(void)
 569 /* register current parameters and append to the host list */
 570 {
 571     (void) hostalloc(&current);
 572     trailer = TRUE;
 573 }
 574
 575 char *prependdir (const char *file, const char *dir)
 576 /* if a filename is relative to dir, convert it to an absolute path */
 577 {
 578     char *newfile;
 579     if (!file[0] ||                     /* null path */
 580         file[0] == '/' ||               /* absolute path */
 581         strcmp(file, "-") == 0 ||       /* stdin/stdout */
 582         !dir[0])                        /* we don't HAVE_GETCWD */
 583         return xstrdup (file);
 584     newfile = (char *)xmalloc (strlen (dir) + 1 + strlen (file) + 1);
 585     if (dir[strlen(dir) - 1] != '/')
 586         sprintf (newfile, "%s/%s", dir, file);
 587     else
 588         sprintf (newfile, "%s%s", dir, file);
 589     return newfile;
 590 }
 591
 592 /* rcfile_y.y ends here */