--- /dev/null
+/* Gateway kernel
+ * Europagate, 1995
+ *
+ * $Log: main.c,v $
+ * 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.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "kernel.h"
+
+GwRes kernel_res;
+CCL_bibset bibset;
+FILE *reply_fd = stdout;
+
+int main (int argc, char **argv)
+{
+ char *bib_fname;
+ FILE *bib_inf;
+
+ gw_log_init (*argv);
+ kernel_res = gw_res_init ();
+ bibset = ccl_qual_mk ();
+ while (--argc > 0)
+ {
+ if (**++argv == '-')
+ {
+ switch (argv[0][1])
+ {
+ case 'b':
+ if (argv[0][2])
+ bib_fname = argv[0]+2;
+ else if (argc > 0)
+ {
+ --argc;
+ bib_fname = *++argv;
+ }
+ else
+ {
+ gw_log (GW_LOG_FATAL, "main", "missing bib filename");
+ exit (1);
+ }
+ bib_inf = fopen (bib_fname, "r");
+ if (!bib_inf)
+ {
+ gw_log (GW_LOG_FATAL, "main", "cannot open %s", bib_fname);
+ exit (1);
+ }
+ ccl_qual_file (bibset, bib_inf);
+ fclose (bib_inf);
+ break;
+ default:
+ gw_log (GW_LOG_FATAL, "main", "unknown option %s", *argv);
+ exit (1);
+ }
+ }
+ 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);
+ }
+ }
+ }
+ urp (stdin);
+ return 0;
+}
--- /dev/null
+/* Gateway kernel
+ * Europagate, 1995
+ *
+ * $Log: urp.c,v $
+ * Revision 1.1 1995/02/15 17:45:30 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.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <ctype.h>
+#include <string.h>
+
+#include "kernel.h"
+
+#define LINE_MAX 256
+
+static char line_buf[LINE_MAX+1];
+
+static struct command_word {
+ char *default_value;
+ char *resource_suffix;
+} command_tab [] =
+{
+{ "find", "find"},
+{ "show", "show"},
+{ "base", "base" },
+{ "help", "help" },
+{ "info", "info" },
+{ "continue", "continue" },
+{ "status", "status" },
+{ "cancel", "cancel" },
+{ NULL, NULL }
+};
+
+static int command_search (struct command_word *tab, struct ccl_token *cmd,
+const char *resource_prefix)
+{
+ int no = 1;
+
+ assert (resource_prefix);
+ assert (tab);
+ assert (cmd);
+ while (tab->default_value)
+ {
+ char *cp, command_names[60];
+ char resource_name[60];
+ const char *v;
+
+ sprintf (resource_name, "%s%s", resource_prefix,
+ tab->resource_suffix);
+ v = gw_res_get (kernel_res, resource_name, tab->default_value);
+ assert (v);
+ strcpy (command_names, v);
+ cp = command_names;
+ while (1)
+ {
+ char *split;
+
+ if ((split = strchr (cp, ' ')))
+ *split = '\0';
+ if (cmd->len == strlen(cp) &&
+ !memcmp (cmd->name, cp, cmd->len))
+ return no;
+ if (!split)
+ break;
+ cp = split+1;
+ }
+ no++;
+ tab++;
+ }
+ return 0;
+}
+
+static int email_header (FILE *inf, char *from_str)
+{
+ *from_str = '\0';
+ while (fgets (line_buf, LINE_MAX, inf))
+ {
+ if (line_buf[0] == '\n')
+ return 0;
+ if (strncmp (line_buf, "From ", 5) == 0)
+ sscanf (line_buf+4, "%s", from_str);
+ }
+ return 1;
+}
+
+static int exec_find (struct ccl_token *list)
+{
+ struct ccl_rpn_node *rpn;
+ int error;
+ const char *pos;
+
+ rpn = ccl_find (bibset, list, &error, &pos);
+ if (!rpn)
+ {
+ fprintf (reply_fd, " %*s^ - ", pos - line_buf, " ");
+ fprintf (reply_fd, "%s\n", ccl_err_msg (error));
+ return -1;
+ }
+ ccl_pr_tree (rpn, reply_fd);
+ fprintf (reply_fd, "\n");
+ return 0;
+}
+
+static int exec_command (const char *str)
+{
+ struct ccl_token *cmd = ccl_tokenize (str);
+ int no;
+
+ ccl_token_and = gw_res_get (kernel_res, "ccl.token.and", "and");
+ ccl_token_or = gw_res_get (kernel_res, "ccl.token.or", "or");
+ ccl_token_not = gw_res_get (kernel_res, "ccl.token.not", "not");
+ ccl_token_set = gw_res_get (kernel_res, "ccl.token.set", "set");
+
+ fprintf (reply_fd, "> %s", str);
+ if (cmd->kind == CCL_TOK_TERM &&
+ (no = command_search (command_tab, cmd, "ccl.command.")))
+ {
+ switch (no)
+ {
+ case 1:
+ return exec_find (cmd->next);
+ break;
+ case 2:
+ fprintf (reply_fd, " show found\n");
+ break;
+ default:
+ fprintf (reply_fd, " unimplemented command\n");
+ }
+ }
+ else
+ fprintf (reply_fd, " ^ unknown command\n");
+ return 0;
+}
+
+int urp (FILE *inf)
+{
+ char from_str[128];
+ int command_no = 0;
+ char *reply_fname = NULL;
+
+ if (email_header (inf, from_str))
+ {
+ gw_log (GW_LOG_WARN, "urp", "No message body");
+ return -1;
+ }
+ if (*from_str)
+ {
+ reply_fname = tempnam (gw_res_get (kernel_res,
+ "gw.reply.tmp.dir", NULL),
+ gw_res_get (kernel_res,
+ "gw.reply.tmp.prefix", "gwr"));
+
+ reply_fd = fopen (reply_fname, "w");
+ if (!reply_fd)
+ {
+ gw_log (GW_LOG_FATAL, "urp", "Cannot create %s",
+ reply_fname);
+ return -1;
+ }
+ }
+ fprintf (reply_fd, "%s\n", gw_res_get (kernel_res, "gw.msg.greeting",
+ "Email->Z39.50 gateway"));
+ while (fgets (line_buf, LINE_MAX, inf))
+ {
+ if (line_buf[0] == '\n')
+ break;
+ if (isalpha (line_buf[0]))
+ exec_command (line_buf);
+ command_no++;
+ }
+ if (!command_no)
+ fprintf (reply_fd, "%s\n", gw_res_get (kernel_res, "gw.err.nullbody",
+ "No body"));
+ if (*from_str)
+ {
+ const char *mta;
+ char cmd[256];
+ int mta_code;
+
+ assert (reply_fname);
+ fclose (reply_fd);
+ reply_fd = stdout;
+
+ mta = gw_res_get (kernel_res, "gw.reply.mta", "/usr/lib/sendmail");
+ sprintf (cmd, "%s %s < %s", mta, from_str, reply_fname);
+
+ mta_code = system (cmd);
+ if (mta_code)
+ gw_log (GW_LOG_FATAL, "urp", "Reply '%s' got exit code %d",
+ cmd, mta_code);
+ unlink (reply_fname);
+ }
+ return 0;
+}
projects / egate.git / commitdiff