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authorReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
committerReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
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+/* $Id: http-rman.c,v 1.1.1.4 2004/03/14 08:29:12 eich Exp $
+ *
+ * Name:
+ * http-rman.c -- a rudimentary man-page HTTP server
+ *
+ * Description:
+ * This is a minimal HTTP server using RosettaMan by T.A. Phelps
+ * (phelps@ACM.org) to produce hypertext renditions
+ * of man-pages on the fly.
+ *
+ * This server processes URLs with the following syntax:
+ *
+ * [/man] ?<command> [ ?<section> ]
+ *
+ * For URLs matching this format, it pipes the output of
+ * man <section> <command> through rman and sends it to
+ * the HTTP client. For other URLs, it returns the document
+ * given as argv[1] (using cat(1). The leading /man is
+ * optional, but is strongly recommended.
+ *
+ * This server is shipped as two files, the http-rman.c
+ * sources and the http-rman.html sample frontpage. I have
+ * not included a Makefile; you can write your own or just
+ * type [g]cc -o http-rman http-rman.c
+ *
+ * What do I need to run this:
+ * If you don't have it, pick up RosettaMan by anonymous ftp
+ * from ftp.cs.berkeley.edu: /ucb/people/phelps/tcl/rman.tar.Z
+ *
+ * You'll also need an HTTP client such as NCSA Mosaic to talk
+ * to this server. Mosaic is available by anonymous FTP from
+ * ftp://ftp.ncsa.uiuc.edu/Mosaic
+ *
+ * Both RosettaMan (rman) and Mosaic are available from many
+ * other sites. Try Archie, or check your local or national net
+ * archive.
+ *
+ * How do I get it running:
+ * First, compile the server (see above), and install it
+ * somewhere.
+ *
+ * The server runs under inetd(8). Add a service to
+ * /etc/services, say:
+ *
+ * http-rman 4080/tcp
+ *
+ * If you're not about to install another HTTP server on your
+ * machine, you may use the default HTTP port, 80, instead.
+ *
+ * Then add an entry to /etc/inetd.conf, such as (on a single line):
+ *
+ * http-rman stream tcp nowait root /usr/local/bin/http-rman
+ * http-rman /usr/local/lib/rman/http-rman.html
+ *
+ * Change /usr/local/bin and /usr/local/lib/rman to where you
+ * installed the two files. In addition, you may wish to run
+ * the server as something other than root...
+ *
+ * Restart inetd(8) (use kill -HUP or kill it and start it again)
+ * and try the following:
+ *
+ * $ Mosaic http://localhost:4080
+ *
+ * If you don't have Mosaic, try the following instead:
+ *
+ * $ telnet localhost 4080
+ * Trying 127.0.0.1...
+ * Connected to localhost.
+ * Escape character is '^]'.
+ * GET /man?ls <return>
+ * <return>
+ * HTTP/1.0 200 OK
+ * ...
+ *
+ * Portability:
+ * You'll need an ANSI compiler (or an editor and some patience).
+ * As it stands right now, this code has been successfully
+ * compiled on OSF/1 AXP using cc, and on SunOS 4.1 using gcc.
+ * Might need some tuning for other platforms.
+ *
+ * Legal Issues:
+ * Check the external visibility of the http-rman service
+ * you choose. This server gives a user access to ALL man-
+ * pages on your machine. You may have installed copyrighted
+ * software (your operating system, for example) with
+ * man-pages that you are NOT allowed to make visible for
+ * anyone out there...
+ *
+ * History:
+ * 94-04-30 fl: created
+ * 94-05-13 fl: stripped away everything but rman support
+ *
+ * Copyright (c) Fredrik Lundh 1994 (fredrik_lundh@ivab.se)
+ * All rights reserved.
+ */
+
+
+#include <stdio.h> /* printf(), fflush(stdio) etc */
+#include <string.h> /* strrchr(), strcmp() etc */
+
+
+static int
+http_error(int error)
+{
+ char *p;
+
+ switch (error) {
+ case 400:
+ p = "Bad Request";
+ break;
+ case 404:
+ p = "Not Found";
+ break;
+ default:
+ p = "Error";
+ }
+ printf("HTTP/1.0 %d %s\r\n", error, p);
+ printf("MIME-version: 1.0\r\n");
+ printf("Content-Type: text/html\r\n\r\n");
+ printf("<head><title>%d %s</title></head>\r\n", error, p);
+ printf("<body><h1>%d %s</h1></body>\r\n", error, p);
+ return 0;
+}
+
+
+static int
+http_rman(char *url)
+{
+ char *pName;
+ char *pSection;
+ char buf[200];
+
+ /* parse URL: should be /man?command[?section] */
+ pSection = strrchr(url, '?');
+ if (!pSection) {
+ return -1;
+ }
+ pName = pSection-1;
+ *pSection++ = '\0';
+
+ pName = strrchr(url, '?');
+ if (!pName) {
+ pName = pSection;
+ pSection = "";
+ }
+ else
+ pName++;
+
+ sprintf(buf, "man %s %s | rman -r \"man?%%s?%%s\" -n %s -f html",
+ pSection, pName, pName);
+
+ return system(buf);
+}
+
+
+int
+main(int ac, char **av)
+{
+ char buf[200];
+ char url[200];
+ int status;
+ char *sFrontpage = "/usr/local/lib/rman/http-rman.html";
+
+/* check arguments */
+
+ if (ac > 1)
+ sFrontpage = av[1];
+
+/* just read in one line from stdin and make sure it is a GET
+command */
+
+ if (gets(buf)) {
+
+ /* read rest of command (just for the sake of it) */
+ while (gets(url) && url[0] != '\r')
+ ;
+
+ /* command should be GET <url> [HTTP/1.0] */
+ if (sscanf(buf, "GET %s", url) == 1) {
+
+ status = http_rman(url);
+
+ if (status < 0) {
+ sprintf(buf, "cat %s", sFrontpage);
+ if (system(buf) == 0)
+ status = 0;
+ }
+
+ if (status < 0)
+ http_error(404);
+
+ } else
+
+ http_error(400);
+ }
+
+ fflush(stdout);
+
+ exit(0);
+}