X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=kernel%2Fmain.c;h=f1f1694fefb88a82df69c0d0ce0e84d1604303ef;hb=25db261b6bbbfcc7bc26f679f195b51d31b9d7d7;hp=c3e4f6555402e4f216d72a01f86fa62f33b8ff25;hpb=f6a107777079379b767452dc6ade3f56272af49e;p=egate.git diff --git a/kernel/main.c b/kernel/main.c index c3e4f65..f1f1694 100644 --- a/kernel/main.c +++ b/kernel/main.c @@ -1,8 +1,147 @@ -/* Gateway kernel +/* + * Copyright (c) 1995, the EUROPAGATE consortium (see below). + * + * The EUROPAGATE consortium members are: + * + * University College Dublin + * Danmarks Teknologiske Videnscenter + * An Chomhairle Leabharlanna + * Consejo Superior de Investigaciones Cientificas + * + * Permission to use, copy, modify, distribute, and sell this software and + * its documentation, in whole or in part, for any purpose, is hereby granted, + * provided that: + * + * 1. This copyright and permission notice appear in all copies of the + * software and its documentation. Notices of copyright or attribution + * which appear at the beginning of any file must remain unchanged. + * + * 2. The names of EUROPAGATE or the project partners may not be used to + * endorse or promote products derived from this software without specific + * prior written permission. + * + * 3. Users of this software (implementors and gateway operators) agree to + * inform the EUROPAGATE consortium of their use of the software. This + * information will be used to evaluate the EUROPAGATE project and the + * software, and to plan further developments. The consortium may use + * the information in later publications. + * + * 4. Users of this software agree to make their best efforts, when + * documenting their use of the software, to acknowledge the EUROPAGATE + * consortium, and the role played by the software in their work. + * + * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND, + * EXPRESS, IMPLIED, OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * IN NO EVENT SHALL THE EUROPAGATE CONSORTIUM OR ITS MEMBERS BE LIABLE + * FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF + * ANY KIND, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA + * OR PROFITS, WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND + * ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE + * USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ +/* Gateway kernel - Main * Europagate, 1995 * * $Log: main.c,v $ - * Revision 1.1 1995/02/15 17:45:29 adam + * Revision 1.30 1996/02/12 10:04:54 adam + * The gateway doesn't try to reconnect if it is already known that + * it will fail (connect_fail flag introduced). + * + * Revision 1.29 1995/07/28 10:51:08 adam + * Bug fix: account from previous session had effect when new target command + * was executed. + * + * Revision 1.28 1995/07/03 08:20:15 adam + * More help information and better diagnostics. + * + * Revision 1.27 1995/05/19 13:25:59 adam + * Bug fixes. Better command line options. + * + * Revision 1.26 1995/05/18 12:03:08 adam + * Bug fixes and minor improvements. + * + * Revision 1.25 1995/05/16 09:40:42 adam + * LICENSE. Setting of CCL token names (and/or/not/set) in read_kernel_res. + * + * Revision 1.24 1995/05/04 10:40:07 adam + * More work on Def-settings. + * + * Revision 1.23 1995/05/03 16:34:18 adam + * CCL def command, i.e. user definitions - saved as resource files. + * + * Revision 1.22 1995/05/03 07:37:39 adam + * CCL commands stop/continue implemented. New functions gw_res_{int,bool} + * are used when possible. + * + * Revision 1.21 1995/05/01 16:26:56 adam + * More work on resource monitor. + * + * Revision 1.20 1995/05/01 12:43:32 adam + * First work on resource monitor program. + * + * Revision 1.19 1995/04/19 16:01:58 adam + * Some hacks to get the FIFO communication work!! Isn't reliable. + * Resource gw.account added - default account info. + * + * Revision 1.18 1995/04/19 13:19:09 adam + * New command: account - for authentication. + * + * Revision 1.17 1995/04/19 10:46:18 adam + * Persistency works much better now. New command: status - history-like + * + * Revision 1.16 1995/04/19 07:31:07 adam + * First work on Z39.50 persistence. + * + * Revision 1.15 1995/04/17 09:34:30 adam + * Timeout (idletime) adjustable. Minor changes in kernel. + * + * Revision 1.14 1995/03/28 11:42:34 adam + * First use of string-queue utility. + * + * Revision 1.13 1995/03/28 08:01:25 adam + * FIFO existence is used to test for a running kernel. + * + * Revision 1.12 1995/03/27 12:51:05 adam + * New log level in use: GW_LOG_ERRNO. + * + * Revision 1.11 1995/03/27 08:24:02 adam + * First use of gip interface and gw-db. + * First work on eti program. + * + * Revision 1.10 1995/03/01 14:32:25 adam + * Better diagnostics. Default is, that only one database selected when + * several are known. + * + * Revision 1.9 1995/02/23 08:32:17 adam + * Changed header. + * + * Revision 1.7 1995/02/22 15:22:33 adam + * Much more checking of run-time state. Show command never retrieves + * more records than indicated by the previous search request. Help + * command available. The maximum number of records retrieved can be + * controlled now. + * + * Revision 1.6 1995/02/22 08:51:34 adam + * Output function can be customized in fml, which is used to print + * the reply to reply_fd. + * + * Revision 1.5 1995/02/20 21:16:20 adam + * FML support. Bug fixes. Profile for drewdb. + * + * Revision 1.4 1995/02/17 17:06:16 adam + * Minor changes. + * + * Revision 1.3 1995/02/16 18:35:09 adam + * First use of Zdist library. Search requests are supported. + * Present requests are not supported yet. + * + * Revision 1.2 1995/02/16 13:21:00 adam + * Organization of resource files for targets and conversion + * language implemented. + * + * Revision 1.1 1995/02/15 17:45:29 adam * First version of email gateway kernel. Email requests are read * from stdin. The output is transferred to an MTA if 'From' is * found in the header - or stdout if absent. No Z39.50 client is used. @@ -11,66 +150,545 @@ #include #include +#include +#include +#include +#include +#include +#include +#include +#include #include "kernel.h" -GwRes kernel_res; -CCL_bibset bibset; FILE *reply_fd = stdout; +struct gw_kernel_info info; + +static void kernel_events (struct str_queue *queue) +{ + char fifo_client_name[1024]; + char fifo_server_name[1024]; + char line_buf[1024]; + GIP gip; + fd_set set_r; + int r, gip_fd; + struct timeval tv; + int timeout; + int continuation = 0; + int extra_fd; + int persist_flag; + int stop_flag = 0; + + persist_flag = gw_res_bool (info.kernel_res, "gw.persist", 0); + timeout = gw_res_int (info.kernel_res, "gw.timeout", 600); + gw_log (GW_LOG_DEBUG, KERNEL_LOG, "event loop"); + + sprintf (fifo_client_name, "fifo.c.%d", info.userid); + sprintf (fifo_server_name, "fifo.s.%d", info.userid); + + gip = gips_initialize (fifo_server_name); + gips_open (gip, fifo_client_name, 1); + gip_fd = gip_infileno (gip); + extra_fd = open (fifo_server_name, O_WRONLY); + + while (1) + { + FD_ZERO (&set_r); + FD_SET (gip_fd, &set_r); + if (stop_flag) + tv.tv_sec = 1; + else + tv.tv_sec = timeout; + tv.tv_usec = 0; + + gw_log (GW_LOG_DEBUG, KERNEL_LOG, "IPC select"); + r = select (gip_fd+1, &set_r, NULL, NULL, &tv); + if (r == -1) + { + gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, KERNEL_LOG, "select"); + exit (1); + } + if (r == 0) + { + if (stop_flag) + gw_log (GW_LOG_STAT, KERNEL_LOG, "Stopping"); + else + gw_log (GW_LOG_STAT, KERNEL_LOG, "Timeout after %d seconds", + timeout); + if (info.zass && persist_flag) + save_p_state (info.userid); + break; + } + if (FD_ISSET (gip_fd, &set_r)) + { + char command[128], *cp; + + if (!(lgets (command, 127, gip_fd))) + { + gw_log (GW_LOG_WARN, KERNEL_LOG, "Unexpected close"); + break; + } + if ((cp = strchr (command, '\n'))) + *cp = '\0'; + gw_log (GW_LOG_STAT, KERNEL_LOG, "IPC: %s", command); + if (!strcmp (command, "mail")) + { + gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Incoming mail"); + while (lgets (line_buf, sizeof(line_buf)-1, gip_fd)) + str_queue_enq (queue, line_buf); + urp_start (continuation, queue); + if (persist_flag && !continuation) + load_p_state (info.userid); + r = urp_command (queue); + if (r == 1) /* stop? */ + { + info.zass = NULL; /* delete association */ + *info.target = 0; /* indicate no target */ + read_kernel_res(); /* reread resources */ + if (persist_flag) + del_p_state (info.userid); /* remove persist file */ + } + urp_end (); + while (str_queue_deq (queue, 0, 0)) + ; + } + else if (!strcmp (command, "stop")) + { + gw_log (GW_LOG_DEBUG, KERNEL_LOG, "stop"); + while (lgets (line_buf, sizeof(line_buf)-1, gip_fd)) + ; + break; + } + else + gw_log (GW_LOG_WARN, KERNEL_LOG, "Unknown IPC: %s", command); + continuation = 1; + } + } + close (extra_fd); + gips_close (gip); + gips_destroy (gip); +} + int main (int argc, char **argv) { - char *bib_fname; - FILE *bib_inf; + struct str_queue *queue; + + info.kernel_res = NULL; + info.default_res = "default.res"; + info.override_res = NULL; + *info.target = 0; + *info.account = 0; + info.account_in_session = 1; + info.lang = NULL; + info.bibset = NULL; + info.zass = NULL; + info.override_portno = NULL; + info.override_hostname = NULL; + info.databases = NULL; + info.database = NULL; + info.setno = -1; + info.userid = -1; + info.connect_failed = 0; +#if USE_FML + info.fml = NULL; +#endif + info.sets = NULL; gw_log_init (*argv); - kernel_res = gw_res_init (); - bibset = ccl_qual_mk (); + info.kernel_res = gw_res_init (); while (--argc > 0) { if (**++argv == '-') { switch (argv[0][1]) { - case 'b': + case 'H': + fprintf (stderr, "kernel [options] [resourceFile]\n"); + fprintf (stderr, "If no resource file is specified"); + fprintf (stderr, " default.res is used\n"); + fprintf (stderr, "Options:\n"); + fprintf (stderr, " -d Enable debugging log\n"); + fprintf (stderr, " -t target Open target immediately\n"); + fprintf (stderr, " -g lang Set language\n"); + fprintf (stderr, " -o resource Override with resource\n"); + fprintf (stderr, " -h host Override host\n"); + fprintf (stderr, " -p port Override port\n"); + fprintf (stderr, " -l log Set Log file\n"); + fprintf (stderr, " -i id Set IPC userid\n"); + exit (1); + case 'd': + gw_log_level (GW_LOG_ALL & ~RES_DEBUG); + break; + case 'D': + gw_log_level (GW_LOG_ALL); + break; + case 't': if (argv[0][2]) - bib_fname = argv[0]+2; + strcpy (info.target, argv[0]+2); else if (argc > 0) { --argc; - bib_fname = *++argv; + strcpy (info.target, *++argv); } else { - gw_log (GW_LOG_FATAL, "main", "missing bib filename"); + gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing target name"); exit (1); } - bib_inf = fopen (bib_fname, "r"); - if (!bib_inf) + break; + case 'g': + if (argv[0][2]) + info.lang = argv[0]+2; + else if (argc > 0) + { + --argc; + info.lang = *++argv; + } + else { - gw_log (GW_LOG_FATAL, "main", "cannot open %s", bib_fname); + gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing language name"); exit (1); } - ccl_qual_file (bibset, bib_inf); - fclose (bib_inf); break; + case 'o': + if (argv[0][2]) + info.override_res = argv[0]+2; + else if (argc > 0) + { + --argc; + info.override_res = *++argv; + } + else + { + gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing override name"); + exit (1); + } + break; + case 'p': + if (argv[0][2]) + info.override_portno = argv[0]+2; + else if (argc > 0) + { + --argc; + info.override_portno = *++argv; + } + else + { + gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing portno"); + exit (1); + } + break; + case 'h': + if (argv[0][2]) + info.override_hostname = argv[0]+2; + else if (argc > 0) + { + --argc; + info.override_hostname = *++argv; + } + else + { + gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing hostname"); + exit (1); + } + break; + case 'l': + if (argv[0][2]) + gw_log_file (GW_LOG_ALL, argv[0]+2); + else if (argc > 0) + { + --argc; + gw_log_file (GW_LOG_ALL, *++argv); + } + else + { + gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing log filename"); + exit (1); + } + break; + case 'i': + if (argv[0][2]) + info.userid = atoi (argv[0]+2); + else if (argc > 0) + { + --argc; + info.userid = atoi (*++argv); + } + else + { + gw_log (GW_LOG_FATAL, KERNEL_LOG, "missing user id"); + exit (1); + } + gw_log_session (info.userid); + break; default: - gw_log (GW_LOG_FATAL, "main", "unknown option %s", *argv); + gw_log (GW_LOG_FATAL, KERNEL_LOG, "unknown option %s;" + " use -H for help", *argv); exit (1); } } else + info.default_res = *argv; + } + if (!(queue = str_queue_mk ())) + { + gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, KERNEL_LOG, "str_queue_mk"); + exit (1); + } + if (info.userid != -1) + { + read_kernel_res (); + kernel_events (queue); + } + else + { + char line_buf[512]; + read_kernel_res (); + while (lgets (line_buf, sizeof(line_buf)-1, 0)) + str_queue_enq (queue, line_buf); + urp_start (0, queue); + urp_command (queue); + urp_end (); + } + return 0; +} + +struct gw_user_set *user_set_add (const char *name, int hits, + const char *database, + struct ccl_rpn_node *rpn, + int present_flag, + const char *search_str) +{ + struct gw_user_set *s; + + s = malloc (sizeof (*s)); + assert (s); + + s->name = gw_strdup (name); + s->hits = hits; + s->database = gw_strdup (database); + s->rpn = rpn; + s->present_flag = present_flag; + s->search_str = gw_strdup (search_str); + s->prev = info.sets; + info.sets = s; + return s; +} + +void user_set_init (void) +{ + struct gw_user_set *s, *s1; + + for (s = info.sets; s; s = s1) + { + free (s->name); + free (s->database); + ccl_rpn_delete (s->rpn); + s1 = s->prev; + free (s); + } + info.sets = NULL; +} + +struct gw_user_set *user_set_search (const char *name) +{ + struct gw_user_set *s; + + if (!name) + return info.sets; + for (s = info.sets; s; s = s->prev) + if (!strcmp (s->name, name)) + return s; + return NULL; +} + +#if USE_FML +static void fml_inf_write (int ch) +{ + putc (ch, reply_fd); +} +static FILE *fml_inf; + +static int fml_inf_read (void) +{ + return getc (fml_inf); +} +#endif + +void read_kernel_res (void) +{ + const char *v; + char *cp; + char resource_name[256]; + + user_set_init (); + + if (info.bibset) + ccl_qual_rm (&info.bibset); + info.bibset = ccl_qual_mk (); + + if (info.kernel_res) + gw_res_close (info.kernel_res); + info.kernel_res = gw_res_init (); + + gw_log (GW_LOG_DEBUG, KERNEL_LOG, "reading kernel resource, default %s", + info.default_res); + if (*info.target) + gw_log (GW_LOG_DEBUG, KERNEL_LOG, "reading kernel resource, target %s", + info.target); + if (info.lang) + gw_log (GW_LOG_DEBUG, KERNEL_LOG, "reading kernel resource, lang %s", + info.lang); + + /* read default resources. These should exist */ + if (gw_res_merge (info.kernel_res, info.default_res)) + { + gw_log (GW_LOG_WARN, KERNEL_LOG, "Couldn't read resource file %s", + info.default_res); + return; + } + /* fetch target definitions (if defined at all) */ + if (*info.target) + { + sprintf (resource_name, "gw.target.%s", info.target); + v = gw_res_get (info.kernel_res, resource_name, NULL); + if (v) + gw_res_merge (info.kernel_res, v); + } + /* fetch user definitions (if user-id is specified) */ + if (info.userid >= 0) + { + char fname[250]; + sprintf (fname, "user.%d.r", info.userid); + gw_res_merge (info.kernel_res, fname); + } + /* fetch language definitions (if specified at all) */ + v = gw_res_get (info.kernel_res, "gw.language", info.lang); + if (v) + { + sprintf (resource_name, "gw.lang.%s", v); + v = gw_res_get (info.kernel_res, resource_name, NULL); + if (v) + { + gw_log (GW_LOG_DEBUG, KERNEL_LOG, "Reading language resources %s", + v); + gw_res_merge (info.kernel_res, v); + } + } + /* fetch overriding resources from file (if specified) */ + if (info.override_res) + gw_res_merge (info.kernel_res, info.override_res); + + /* read bibset definition for ccl */ + v = gw_res_get (info.kernel_res, "gw.bibset", NULL); + if (v) + { + FILE *bib_inf; + + bib_inf = fopen (v, "r"); + if (!bib_inf) + gw_log (GW_LOG_WARN, KERNEL_LOG, "cannot open %s", v); + else { - int r; - r = gw_res_merge (kernel_res, *argv); - if (r) - { - gw_log (GW_LOG_FATAL, "main", "failed to read resource " - "file %s", *argv); - exit (1); - } + gw_log (GW_LOG_DEBUG, KERNEL_LOG, "reading bib file %s", v); + ccl_qual_file (info.bibset, bib_inf); + fclose (bib_inf); } } - urp (stdin); - return 0; + + /* determine host name and port no */ + sprintf (resource_name, "gw.target.%s", info.target); + if (*info.target && ! gw_res_get (info.kernel_res, resource_name, NULL)) + { + /* target is specified, and there is no sub-resource for it... */ + const char *split; + + if ((split = strchr (info.target, ':'))) + { + memcpy (info.hostname, info.target, split-info.target); + info.hostname[split-info.target] = '\0'; + info.port = atoi (split+1); + } + else + { + strcpy (info.hostname, info.target); + info.port = gw_res_int (info.kernel_res, "gw.portno", 210); + } + } + else + { /* resources gw.hostname and gw.portno will be used */ + strncpy (info.hostname, gw_res_get (info.kernel_res, + "gw.hostname", "localhost"), + sizeof(info.hostname)-1); + info.port = gw_res_int (info.kernel_res, "gw.portno", 210); + strcpy (info.account, gw_res_get (info.kernel_res, "gw.account", "")); + info.account_in_session = 0; + } + /* set info.databases (all available databases for target) */ + /* set info.database (first database for target) */ + if (info.databases) + free (info.databases); + if (info.database) + free (info.database); + v = gw_res_get (info.kernel_res, "gw.databases", ""); + info.databases = gw_strdup (v); + for (cp = info.databases; (cp = strchr (cp, ' ')); cp++) + *cp = ','; + v = gw_res_get (info.kernel_res, "gw.database", ""); + if (*v == '\0' && *info.databases) + { + int len; + cp = strchr (info.databases, ','); + + len = cp ? (cp-info.databases) : strlen (info.databases); + info.database = malloc (len+1); + assert (info.database); + memcpy (info.database, info.databases, len); + info.database[len] = '\0'; + } + else + { + info.database = gw_strdup (v); + for (cp = info.database; (cp = strchr (cp, ' ')); cp++) + *cp = ','; + } + + /* the port no can be explicitly overridden by a command line option */ + if (info.override_portno) + info.port = atoi (info.override_portno); + + /* the hostname can be explicitly overridden by a command line option */ + if (info.override_hostname) + strncpy (info.hostname, info.override_hostname, + sizeof(info.hostname)-1); + + ccl_token_and = gw_res_get (info.kernel_res, "ccl.token.and", "and"); + ccl_token_or = gw_res_get (info.kernel_res, "ccl.token.or", "or"); + ccl_token_not = gw_res_get (info.kernel_res, "ccl.token.not", "not"); + ccl_token_set = gw_res_get (info.kernel_res, "ccl.token.set", "set"); + + /* determine if more than one result-set names is supported */ + if (gw_res_bool (info.kernel_res, "gw.result.set", 1)) + info.setno = 0; + else + info.setno = -1; +#if USE_FML + if (!info.fml) + { + v = gw_res_get (info.kernel_res, "gw.fml", "default.fml"); + fml_inf = fopen (v, "r"); + if (!fml_inf) + gw_log (GW_LOG_WARN, KERNEL_LOG, "cannot open fml script %s", v); + else + { + info.fml = fml_open (); + info.fml->read_func = fml_inf_read; + info.fml->write_func = fml_inf_write; + fml_preprocess (info.fml); + fml_exec (info.fml); + fclose (fml_inf); + } + } +#endif }