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-rw-r--r--contrib/mdocml/cgi.c1150
1 files changed, 1150 insertions, 0 deletions
diff --git a/contrib/mdocml/cgi.c b/contrib/mdocml/cgi.c
new file mode 100644
index 0000000..1e38e3d
--- /dev/null
+++ b/contrib/mdocml/cgi.c
@@ -0,0 +1,1150 @@
+/* $Id: cgi.c,v 1.92 2014/08/05 15:29:30 schwarze Exp $ */
+/*
+ * Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2014 Ingo Schwarze <schwarze@usta.de>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "mandoc.h"
+#include "mandoc_aux.h"
+#include "main.h"
+#include "manpath.h"
+#include "mansearch.h"
+#include "cgi.h"
+
+/*
+ * A query as passed to the search function.
+ */
+struct query {
+ char *manpath; /* desired manual directory */
+ char *arch; /* architecture */
+ char *sec; /* manual section */
+ char *query; /* unparsed query expression */
+ int equal; /* match whole names, not substrings */
+};
+
+struct req {
+ struct query q;
+ char **p; /* array of available manpaths */
+ size_t psz; /* number of available manpaths */
+};
+
+static void catman(const struct req *, const char *);
+static void format(const struct req *, const char *);
+static void html_print(const char *);
+static void html_putchar(char);
+static int http_decode(char *);
+static void http_parse(struct req *, const char *);
+static void http_print(const char *);
+static void http_putchar(char);
+static void http_printquery(const struct req *, const char *);
+static void pathgen(struct req *);
+static void pg_error_badrequest(const char *);
+static void pg_error_internal(void);
+static void pg_index(const struct req *);
+static void pg_noresult(const struct req *, const char *);
+static void pg_search(const struct req *);
+static void pg_searchres(const struct req *,
+ struct manpage *, size_t);
+static void pg_show(struct req *, const char *);
+static void resp_begin_html(int, const char *);
+static void resp_begin_http(int, const char *);
+static void resp_end_html(void);
+static void resp_searchform(const struct req *);
+static void resp_show(const struct req *, const char *);
+static void set_query_attr(char **, char **);
+static int validate_filename(const char *);
+static int validate_manpath(const struct req *, const char *);
+static int validate_urifrag(const char *);
+
+static const char *scriptname; /* CGI script name */
+
+static const int sec_prios[] = {1, 4, 5, 8, 6, 3, 7, 2, 9};
+static const char *const sec_numbers[] = {
+ "0", "1", "2", "3", "3p", "4", "5", "6", "7", "8", "9"
+};
+static const char *const sec_names[] = {
+ "All Sections",
+ "1 - General Commands",
+ "2 - System Calls",
+ "3 - Subroutines",
+ "3p - Perl Subroutines",
+ "4 - Special Files",
+ "5 - File Formats",
+ "6 - Games",
+ "7 - Macros and Conventions",
+ "8 - Maintenance Commands",
+ "9 - Kernel Interface"
+};
+static const int sec_MAX = sizeof(sec_names) / sizeof(char *);
+
+static const char *const arch_names[] = {
+ "amd64", "alpha", "armish", "armv7",
+ "aviion", "hppa", "hppa64", "i386",
+ "ia64", "landisk", "loongson", "luna88k",
+ "macppc", "mips64", "octeon", "sgi",
+ "socppc", "solbourne", "sparc", "sparc64",
+ "vax", "zaurus",
+ "amiga", "arc", "arm32", "atari",
+ "beagle", "cats", "hp300", "mac68k",
+ "mvme68k", "mvme88k", "mvmeppc", "palm",
+ "pc532", "pegasos", "pmax", "powerpc",
+ "sun3", "wgrisc", "x68k"
+};
+static const int arch_MAX = sizeof(arch_names) / sizeof(char *);
+
+/*
+ * Print a character, escaping HTML along the way.
+ * This will pass non-ASCII straight to output: be warned!
+ */
+static void
+html_putchar(char c)
+{
+
+ switch (c) {
+ case ('"'):
+ printf("&quote;");
+ break;
+ case ('&'):
+ printf("&amp;");
+ break;
+ case ('>'):
+ printf("&gt;");
+ break;
+ case ('<'):
+ printf("&lt;");
+ break;
+ default:
+ putchar((unsigned char)c);
+ break;
+ }
+}
+
+static void
+http_printquery(const struct req *req, const char *sep)
+{
+
+ if (NULL != req->q.query) {
+ printf("query=");
+ http_print(req->q.query);
+ }
+ if (0 == req->q.equal)
+ printf("%sapropos=1", sep);
+ if (NULL != req->q.sec) {
+ printf("%ssec=", sep);
+ http_print(req->q.sec);
+ }
+ if (NULL != req->q.arch) {
+ printf("%sarch=", sep);
+ http_print(req->q.arch);
+ }
+ if (NULL != req->q.manpath &&
+ strcmp(req->q.manpath, req->p[0])) {
+ printf("%smanpath=", sep);
+ http_print(req->q.manpath);
+ }
+}
+
+static void
+http_print(const char *p)
+{
+
+ if (NULL == p)
+ return;
+ while ('\0' != *p)
+ http_putchar(*p++);
+}
+
+/*
+ * Call through to html_putchar().
+ * Accepts NULL strings.
+ */
+static void
+html_print(const char *p)
+{
+
+ if (NULL == p)
+ return;
+ while ('\0' != *p)
+ html_putchar(*p++);
+}
+
+/*
+ * Transfer the responsibility for the allocated string *val
+ * to the query structure.
+ */
+static void
+set_query_attr(char **attr, char **val)
+{
+
+ free(*attr);
+ if (**val == '\0') {
+ *attr = NULL;
+ free(*val);
+ } else
+ *attr = *val;
+ *val = NULL;
+}
+
+/*
+ * Parse the QUERY_STRING for key-value pairs
+ * and store the values into the query structure.
+ */
+static void
+http_parse(struct req *req, const char *qs)
+{
+ char *key, *val;
+ size_t keysz, valsz;
+
+ req->q.manpath = NULL;
+ req->q.arch = NULL;
+ req->q.sec = NULL;
+ req->q.query = NULL;
+ req->q.equal = 1;
+
+ key = val = NULL;
+ while (*qs != '\0') {
+
+ /* Parse one key. */
+
+ keysz = strcspn(qs, "=;&");
+ key = mandoc_strndup(qs, keysz);
+ qs += keysz;
+ if (*qs != '=')
+ goto next;
+
+ /* Parse one value. */
+
+ valsz = strcspn(++qs, ";&");
+ val = mandoc_strndup(qs, valsz);
+ qs += valsz;
+
+ /* Decode and catch encoding errors. */
+
+ if ( ! (http_decode(key) && http_decode(val)))
+ goto next;
+
+ /* Handle key-value pairs. */
+
+ if ( ! strcmp(key, "query"))
+ set_query_attr(&req->q.query, &val);
+
+ else if ( ! strcmp(key, "apropos"))
+ req->q.equal = !strcmp(val, "0");
+
+ else if ( ! strcmp(key, "manpath")) {
+#ifdef COMPAT_OLDURI
+ if ( ! strncmp(val, "OpenBSD ", 8)) {
+ val[7] = '-';
+ if ('C' == val[8])
+ val[8] = 'c';
+ }
+#endif
+ set_query_attr(&req->q.manpath, &val);
+ }
+
+ else if ( ! (strcmp(key, "sec")
+#ifdef COMPAT_OLDURI
+ && strcmp(key, "sektion")
+#endif
+ )) {
+ if ( ! strcmp(val, "0"))
+ *val = '\0';
+ set_query_attr(&req->q.sec, &val);
+ }
+
+ else if ( ! strcmp(key, "arch")) {
+ if ( ! strcmp(val, "default"))
+ *val = '\0';
+ set_query_attr(&req->q.arch, &val);
+ }
+
+ /*
+ * The key must be freed in any case.
+ * The val may have been handed over to the query
+ * structure, in which case it is now NULL.
+ */
+next:
+ free(key);
+ key = NULL;
+ free(val);
+ val = NULL;
+
+ if (*qs != '\0')
+ qs++;
+ }
+
+ /* Fall back to the default manpath. */
+
+ if (req->q.manpath == NULL)
+ req->q.manpath = mandoc_strdup(req->p[0]);
+}
+
+static void
+http_putchar(char c)
+{
+
+ if (isalnum((unsigned char)c)) {
+ putchar((unsigned char)c);
+ return;
+ } else if (' ' == c) {
+ putchar('+');
+ return;
+ }
+ printf("%%%.2x", c);
+}
+
+/*
+ * HTTP-decode a string. The standard explanation is that this turns
+ * "%4e+foo" into "n foo" in the regular way. This is done in-place
+ * over the allocated string.
+ */
+static int
+http_decode(char *p)
+{
+ char hex[3];
+ char *q;
+ int c;
+
+ hex[2] = '\0';
+
+ q = p;
+ for ( ; '\0' != *p; p++, q++) {
+ if ('%' == *p) {
+ if ('\0' == (hex[0] = *(p + 1)))
+ return(0);
+ if ('\0' == (hex[1] = *(p + 2)))
+ return(0);
+ if (1 != sscanf(hex, "%x", &c))
+ return(0);
+ if ('\0' == c)
+ return(0);
+
+ *q = (char)c;
+ p += 2;
+ } else
+ *q = '+' == *p ? ' ' : *p;
+ }
+
+ *q = '\0';
+ return(1);
+}
+
+static void
+resp_begin_http(int code, const char *msg)
+{
+
+ if (200 != code)
+ printf("Status: %d %s\r\n", code, msg);
+
+ printf("Content-Type: text/html; charset=utf-8\r\n"
+ "Cache-Control: no-cache\r\n"
+ "Pragma: no-cache\r\n"
+ "\r\n");
+
+ fflush(stdout);
+}
+
+static void
+resp_begin_html(int code, const char *msg)
+{
+
+ resp_begin_http(code, msg);
+
+ printf("<!DOCTYPE HTML PUBLIC "
+ " \"-//W3C//DTD HTML 4.01//EN\""
+ " \"http://www.w3.org/TR/html4/strict.dtd\">\n"
+ "<HTML>\n"
+ "<HEAD>\n"
+ "<META HTTP-EQUIV=\"Content-Type\""
+ " CONTENT=\"text/html; charset=utf-8\">\n"
+ "<LINK REL=\"stylesheet\" HREF=\"%s/man-cgi.css\""
+ " TYPE=\"text/css\" media=\"all\">\n"
+ "<LINK REL=\"stylesheet\" HREF=\"%s/man.css\""
+ " TYPE=\"text/css\" media=\"all\">\n"
+ "<TITLE>%s</TITLE>\n"
+ "</HEAD>\n"
+ "<BODY>\n"
+ "<!-- Begin page content. //-->\n",
+ CSS_DIR, CSS_DIR, CUSTOMIZE_TITLE);
+}
+
+static void
+resp_end_html(void)
+{
+
+ puts("</BODY>\n"
+ "</HTML>");
+}
+
+static void
+resp_searchform(const struct req *req)
+{
+ int i;
+
+ puts(CUSTOMIZE_BEGIN);
+ puts("<!-- Begin search form. //-->");
+ printf("<DIV ID=\"mancgi\">\n"
+ "<FORM ACTION=\"%s\" METHOD=\"get\">\n"
+ "<FIELDSET>\n"
+ "<LEGEND>Manual Page Search Parameters</LEGEND>\n",
+ scriptname);
+
+ /* Write query input box. */
+
+ printf( "<TABLE><TR><TD>\n"
+ "<INPUT TYPE=\"text\" NAME=\"query\" VALUE=\"");
+ if (NULL != req->q.query)
+ html_print(req->q.query);
+ puts("\" SIZE=\"40\">");
+
+ /* Write submission and reset buttons. */
+
+ printf( "<INPUT TYPE=\"submit\" VALUE=\"Submit\">\n"
+ "<INPUT TYPE=\"reset\" VALUE=\"Reset\">\n");
+
+ /* Write show radio button */
+
+ printf( "</TD><TD>\n"
+ "<INPUT TYPE=\"radio\" ");
+ if (req->q.equal)
+ printf("CHECKED=\"checked\" ");
+ printf( "NAME=\"apropos\" ID=\"show\" VALUE=\"0\">\n"
+ "<LABEL FOR=\"show\">Show named manual page</LABEL>\n");
+
+ /* Write section selector. */
+
+ puts( "</TD></TR><TR><TD>\n"
+ "<SELECT NAME=\"sec\">");
+ for (i = 0; i < sec_MAX; i++) {
+ printf("<OPTION VALUE=\"%s\"", sec_numbers[i]);
+ if (NULL != req->q.sec &&
+ 0 == strcmp(sec_numbers[i], req->q.sec))
+ printf(" SELECTED=\"selected\"");
+ printf(">%s</OPTION>\n", sec_names[i]);
+ }
+ puts("</SELECT>");
+
+ /* Write architecture selector. */
+
+ printf( "<SELECT NAME=\"arch\">\n"
+ "<OPTION VALUE=\"default\"");
+ if (NULL == req->q.arch)
+ printf(" SELECTED=\"selected\"");
+ puts(">All Architectures</OPTION>");
+ for (i = 0; i < arch_MAX; i++) {
+ printf("<OPTION VALUE=\"%s\"", arch_names[i]);
+ if (NULL != req->q.arch &&
+ 0 == strcmp(arch_names[i], req->q.arch))
+ printf(" SELECTED=\"selected\"");
+ printf(">%s</OPTION>\n", arch_names[i]);
+ }
+ puts("</SELECT>");
+
+ /* Write manpath selector. */
+
+ if (req->psz > 1) {
+ puts("<SELECT NAME=\"manpath\">");
+ for (i = 0; i < (int)req->psz; i++) {
+ printf("<OPTION ");
+ if (NULL == req->q.manpath ? 0 == i :
+ 0 == strcmp(req->q.manpath, req->p[i]))
+ printf("SELECTED=\"selected\" ");
+ printf("VALUE=\"");
+ html_print(req->p[i]);
+ printf("\">");
+ html_print(req->p[i]);
+ puts("</OPTION>");
+ }
+ puts("</SELECT>");
+ }
+
+ /* Write search radio button */
+
+ printf( "</TD><TD>\n"
+ "<INPUT TYPE=\"radio\" ");
+ if (0 == req->q.equal)
+ printf("CHECKED=\"checked\" ");
+ printf( "NAME=\"apropos\" ID=\"search\" VALUE=\"1\">\n"
+ "<LABEL FOR=\"search\">Search with apropos query</LABEL>\n");
+
+ puts("</TD></TR></TABLE>\n"
+ "</FIELDSET>\n"
+ "</FORM>\n"
+ "</DIV>");
+ puts("<!-- End search form. //-->");
+}
+
+static int
+validate_urifrag(const char *frag)
+{
+
+ while ('\0' != *frag) {
+ if ( ! (isalnum((unsigned char)*frag) ||
+ '-' == *frag || '.' == *frag ||
+ '/' == *frag || '_' == *frag))
+ return(0);
+ frag++;
+ }
+ return(1);
+}
+
+static int
+validate_manpath(const struct req *req, const char* manpath)
+{
+ size_t i;
+
+ if ( ! strcmp(manpath, "mandoc"))
+ return(1);
+
+ for (i = 0; i < req->psz; i++)
+ if ( ! strcmp(manpath, req->p[i]))
+ return(1);
+
+ return(0);
+}
+
+static int
+validate_filename(const char *file)
+{
+
+ if ('.' == file[0] && '/' == file[1])
+ file += 2;
+
+ return ( ! (strstr(file, "../") || strstr(file, "/..") ||
+ (strncmp(file, "man", 3) && strncmp(file, "cat", 3))));
+}
+
+static void
+pg_index(const struct req *req)
+{
+
+ resp_begin_html(200, NULL);
+ resp_searchform(req);
+ printf("<P>\n"
+ "This web interface is documented in the\n"
+ "<A HREF=\"%s/mandoc/man8/man.cgi.8\">man.cgi</A>\n"
+ "manual, and the\n"
+ "<A HREF=\"%s/mandoc/man1/apropos.1\">apropos</A>\n"
+ "manual explains the query syntax.\n"
+ "</P>\n",
+ scriptname, scriptname);
+ resp_end_html();
+}
+
+static void
+pg_noresult(const struct req *req, const char *msg)
+{
+ resp_begin_html(200, NULL);
+ resp_searchform(req);
+ puts("<P>");
+ puts(msg);
+ puts("</P>");
+ resp_end_html();
+}
+
+static void
+pg_error_badrequest(const char *msg)
+{
+
+ resp_begin_html(400, "Bad Request");
+ puts("<H1>Bad Request</H1>\n"
+ "<P>\n");
+ puts(msg);
+ printf("Try again from the\n"
+ "<A HREF=\"%s\">main page</A>.\n"
+ "</P>", scriptname);
+ resp_end_html();
+}
+
+static void
+pg_error_internal(void)
+{
+ resp_begin_html(500, "Internal Server Error");
+ puts("<P>Internal Server Error</P>");
+ resp_end_html();
+}
+
+static void
+pg_searchres(const struct req *req, struct manpage *r, size_t sz)
+{
+ char *arch, *archend;
+ size_t i, iuse, isec;
+ int archprio, archpriouse;
+ int prio, priouse;
+ char sec;
+
+ for (i = 0; i < sz; i++) {
+ if (validate_filename(r[i].file))
+ continue;
+ fprintf(stderr, "invalid filename %s in %s database\n",
+ r[i].file, req->q.manpath);
+ pg_error_internal();
+ return;
+ }
+
+ if (1 == sz) {
+ /*
+ * If we have just one result, then jump there now
+ * without any delay.
+ */
+ printf("Status: 303 See Other\r\n");
+ printf("Location: http://%s%s/%s/%s?",
+ HTTP_HOST, scriptname, req->q.manpath, r[0].file);
+ http_printquery(req, "&");
+ printf("\r\n"
+ "Content-Type: text/html; charset=utf-8\r\n"
+ "\r\n");
+ return;
+ }
+
+ resp_begin_html(200, NULL);
+ resp_searchform(req);
+ puts("<DIV CLASS=\"results\">");
+ puts("<TABLE>");
+
+ for (i = 0; i < sz; i++) {
+ printf("<TR>\n"
+ "<TD CLASS=\"title\">\n"
+ "<A HREF=\"%s/%s/%s?",
+ scriptname, req->q.manpath, r[i].file);
+ http_printquery(req, "&amp;");
+ printf("\">");
+ html_print(r[i].names);
+ printf("</A>\n"
+ "</TD>\n"
+ "<TD CLASS=\"desc\">");
+ html_print(r[i].output);
+ puts("</TD>\n"
+ "</TR>");
+ }
+
+ puts("</TABLE>\n"
+ "</DIV>");
+
+ /*
+ * In man(1) mode, show one of the pages
+ * even if more than one is found.
+ */
+
+ if (req->q.equal) {
+ puts("<HR>");
+ iuse = 0;
+ priouse = 10;
+ archpriouse = 3;
+ for (i = 0; i < sz; i++) {
+ isec = strcspn(r[i].file, "123456789");
+ sec = r[i].file[isec];
+ if ('\0' == sec)
+ continue;
+ prio = sec_prios[sec - '1'];
+ if (NULL == req->q.arch) {
+ archprio =
+ (NULL == (arch = strchr(
+ r[i].file + isec, '/'))) ? 3 :
+ (NULL == (archend = strchr(
+ arch + 1, '/'))) ? 0 :
+ strncmp(arch, "amd64/",
+ archend - arch) ? 2 : 1;
+ if (archprio < archpriouse) {
+ archpriouse = archprio;
+ priouse = prio;
+ iuse = i;
+ continue;
+ }
+ if (archprio > archpriouse)
+ continue;
+ }
+ if (prio >= priouse)
+ continue;
+ priouse = prio;
+ iuse = i;
+ }
+ resp_show(req, r[iuse].file);
+ }
+
+ resp_end_html();
+}
+
+static void
+catman(const struct req *req, const char *file)
+{
+ FILE *f;
+ size_t len;
+ int i;
+ char *p;
+ int italic, bold;
+
+ if (NULL == (f = fopen(file, "r"))) {
+ puts("<P>You specified an invalid manual file.</P>");
+ return;
+ }
+
+ puts("<DIV CLASS=\"catman\">\n"
+ "<PRE>");
+
+ while (NULL != (p = fgetln(f, &len))) {
+ bold = italic = 0;
+ for (i = 0; i < (int)len - 1; i++) {
+ /*
+ * This means that the catpage is out of state.
+ * Ignore it and keep going (although the
+ * catpage is bogus).
+ */
+
+ if ('\b' == p[i] || '\n' == p[i])
+ continue;
+
+ /*
+ * Print a regular character.
+ * Close out any bold/italic scopes.
+ * If we're in back-space mode, make sure we'll
+ * have something to enter when we backspace.
+ */
+
+ if ('\b' != p[i + 1]) {
+ if (italic)
+ printf("</I>");
+ if (bold)
+ printf("</B>");
+ italic = bold = 0;
+ html_putchar(p[i]);
+ continue;
+ } else if (i + 2 >= (int)len)
+ continue;
+
+ /* Italic mode. */
+
+ if ('_' == p[i]) {
+ if (bold)
+ printf("</B>");
+ if ( ! italic)
+ printf("<I>");
+ bold = 0;
+ italic = 1;
+ i += 2;
+ html_putchar(p[i]);
+ continue;
+ }
+
+ /*
+ * Handle funny behaviour troff-isms.
+ * These grok'd from the original man2html.c.
+ */
+
+ if (('+' == p[i] && 'o' == p[i + 2]) ||
+ ('o' == p[i] && '+' == p[i + 2]) ||
+ ('|' == p[i] && '=' == p[i + 2]) ||
+ ('=' == p[i] && '|' == p[i + 2]) ||
+ ('*' == p[i] && '=' == p[i + 2]) ||
+ ('=' == p[i] && '*' == p[i + 2]) ||
+ ('*' == p[i] && '|' == p[i + 2]) ||
+ ('|' == p[i] && '*' == p[i + 2])) {
+ if (italic)
+ printf("</I>");
+ if (bold)
+ printf("</B>");
+ italic = bold = 0;
+ putchar('*');
+ i += 2;
+ continue;
+ } else if (('|' == p[i] && '-' == p[i + 2]) ||
+ ('-' == p[i] && '|' == p[i + 1]) ||
+ ('+' == p[i] && '-' == p[i + 1]) ||
+ ('-' == p[i] && '+' == p[i + 1]) ||
+ ('+' == p[i] && '|' == p[i + 1]) ||
+ ('|' == p[i] && '+' == p[i + 1])) {
+ if (italic)
+ printf("</I>");
+ if (bold)
+ printf("</B>");
+ italic = bold = 0;
+ putchar('+');
+ i += 2;
+ continue;
+ }
+
+ /* Bold mode. */
+
+ if (italic)
+ printf("</I>");
+ if ( ! bold)
+ printf("<B>");
+ bold = 1;
+ italic = 0;
+ i += 2;
+ html_putchar(p[i]);
+ }
+
+ /*
+ * Clean up the last character.
+ * We can get to a newline; don't print that.
+ */
+
+ if (italic)
+ printf("</I>");
+ if (bold)
+ printf("</B>");
+
+ if (i == (int)len - 1 && '\n' != p[i])
+ html_putchar(p[i]);
+
+ putchar('\n');
+ }
+
+ puts("</PRE>\n"
+ "</DIV>");
+
+ fclose(f);
+}
+
+static void
+format(const struct req *req, const char *file)
+{
+ struct mparse *mp;
+ struct mdoc *mdoc;
+ struct man *man;
+ void *vp;
+ char *opts;
+ enum mandoclevel rc;
+ int fd;
+ int usepath;
+
+ if (-1 == (fd = open(file, O_RDONLY, 0))) {
+ puts("<P>You specified an invalid manual file.</P>");
+ return;
+ }
+
+ mp = mparse_alloc(MPARSE_SO, MANDOCLEVEL_FATAL, NULL,
+ req->q.manpath);
+ rc = mparse_readfd(mp, fd, file);
+ close(fd);
+
+ if (rc >= MANDOCLEVEL_FATAL) {
+ fprintf(stderr, "fatal mandoc error: %s/%s\n",
+ req->q.manpath, file);
+ pg_error_internal();
+ return;
+ }
+
+ usepath = strcmp(req->q.manpath, req->p[0]);
+ mandoc_asprintf(&opts,
+ "fragment,man=%s?query=%%N&sec=%%S%s%s%s%s",
+ scriptname,
+ req->q.arch ? "&arch=" : "",
+ req->q.arch ? req->q.arch : "",
+ usepath ? "&manpath=" : "",
+ usepath ? req->q.manpath : "");
+
+ mparse_result(mp, &mdoc, &man, NULL);
+ if (NULL == man && NULL == mdoc) {
+ fprintf(stderr, "fatal mandoc error: %s/%s\n",
+ req->q.manpath, file);
+ pg_error_internal();
+ mparse_free(mp);
+ return;
+ }
+
+ vp = html_alloc(opts);
+
+ if (NULL != mdoc)
+ html_mdoc(vp, mdoc);
+ else
+ html_man(vp, man);
+
+ html_free(vp);
+ mparse_free(mp);
+ free(opts);
+}
+
+static void
+resp_show(const struct req *req, const char *file)
+{
+
+ if ('.' == file[0] && '/' == file[1])
+ file += 2;
+
+ if ('c' == *file)
+ catman(req, file);
+ else
+ format(req, file);
+}
+
+static void
+pg_show(struct req *req, const char *fullpath)
+{
+ char *manpath;
+ const char *file;
+
+ if ((file = strchr(fullpath, '/')) == NULL) {
+ pg_error_badrequest(
+ "You did not specify a page to show.");
+ return;
+ }
+ manpath = mandoc_strndup(fullpath, file - fullpath);
+ file++;
+
+ if ( ! validate_manpath(req, manpath)) {
+ pg_error_badrequest(
+ "You specified an invalid manpath.");
+ free(manpath);
+ return;
+ }
+
+ /*
+ * Begin by chdir()ing into the manpath.
+ * This way we can pick up the database files, which are
+ * relative to the manpath root.
+ */
+
+ if (chdir(manpath) == -1) {
+ fprintf(stderr, "chdir %s: %s\n",
+ manpath, strerror(errno));
+ pg_error_internal();
+ free(manpath);
+ return;
+ }
+
+ if (strcmp(manpath, "mandoc")) {
+ free(req->q.manpath);
+ req->q.manpath = manpath;
+ } else
+ free(manpath);
+
+ if ( ! validate_filename(file)) {
+ pg_error_badrequest(
+ "You specified an invalid manual file.");
+ return;
+ }
+
+ resp_begin_html(200, NULL);
+ resp_searchform(req);
+ resp_show(req, file);
+ resp_end_html();
+}
+
+static void
+pg_search(const struct req *req)
+{
+ struct mansearch search;
+ struct manpaths paths;
+ struct manpage *res;
+ char **cp;
+ const char *ep, *start;
+ size_t ressz;
+ int i, sz;
+
+ /*
+ * Begin by chdir()ing into the root of the manpath.
+ * This way we can pick up the database files, which are
+ * relative to the manpath root.
+ */
+
+ if (-1 == (chdir(req->q.manpath))) {
+ fprintf(stderr, "chdir %s: %s\n",
+ req->q.manpath, strerror(errno));
+ pg_error_internal();
+ return;
+ }
+
+ search.arch = req->q.arch;
+ search.sec = req->q.sec;
+ search.deftype = req->q.equal ? TYPE_Nm : (TYPE_Nm | TYPE_Nd);
+ search.flags = req->q.equal ? MANSEARCH_MAN : 0;
+
+ paths.sz = 1;
+ paths.paths = mandoc_malloc(sizeof(char *));
+ paths.paths[0] = mandoc_strdup(".");
+
+ /*
+ * Poor man's tokenisation: just break apart by spaces.
+ * Yes, this is half-ass. But it works for now.
+ */
+
+ ep = req->q.query;
+ while (ep && isspace((unsigned char)*ep))
+ ep++;
+
+ sz = 0;
+ cp = NULL;
+ while (ep && '\0' != *ep) {
+ cp = mandoc_reallocarray(cp, sz + 1, sizeof(char *));
+ start = ep;
+ while ('\0' != *ep && ! isspace((unsigned char)*ep))
+ ep++;
+ cp[sz] = mandoc_malloc((ep - start) + 1);
+ memcpy(cp[sz], start, ep - start);
+ cp[sz++][ep - start] = '\0';
+ while (isspace((unsigned char)*ep))
+ ep++;
+ }
+
+ if (0 == mansearch(&search, &paths, sz, cp, "Nd", &res, &ressz))
+ pg_noresult(req, "You entered an invalid query.");
+ else if (0 == ressz)
+ pg_noresult(req, "No results found.");
+ else
+ pg_searchres(req, res, ressz);
+
+ for (i = 0; i < sz; i++)
+ free(cp[i]);
+ free(cp);
+
+ for (i = 0; i < (int)ressz; i++) {
+ free(res[i].file);
+ free(res[i].names);
+ free(res[i].output);
+ }
+ free(res);
+
+ free(paths.paths[0]);
+ free(paths.paths);
+}
+
+int
+main(void)
+{
+ struct req req;
+ const char *path;
+ const char *querystring;
+ int i;
+
+ /* Scan our run-time environment. */
+
+ if (NULL == (scriptname = getenv("SCRIPT_NAME")))
+ scriptname = "";
+
+ if ( ! validate_urifrag(scriptname)) {
+ fprintf(stderr, "unsafe SCRIPT_NAME \"%s\"\n",
+ scriptname);
+ pg_error_internal();
+ return(EXIT_FAILURE);
+ }
+
+ /*
+ * First we change directory into the MAN_DIR so that
+ * subsequent scanning for manpath directories is rooted
+ * relative to the same position.
+ */
+
+ if (-1 == chdir(MAN_DIR)) {
+ fprintf(stderr, "MAN_DIR: %s: %s\n",
+ MAN_DIR, strerror(errno));
+ pg_error_internal();
+ return(EXIT_FAILURE);
+ }
+
+ memset(&req, 0, sizeof(struct req));
+ pathgen(&req);
+
+ /* Next parse out the query string. */
+
+ if (NULL != (querystring = getenv("QUERY_STRING")))
+ http_parse(&req, querystring);
+
+ if ( ! (NULL == req.q.manpath ||
+ validate_manpath(&req, req.q.manpath))) {
+ pg_error_badrequest(
+ "You specified an invalid manpath.");
+ return(EXIT_FAILURE);
+ }
+
+ if ( ! (NULL == req.q.arch || validate_urifrag(req.q.arch))) {
+ pg_error_badrequest(
+ "You specified an invalid architecture.");
+ return(EXIT_FAILURE);
+ }
+
+ /* Dispatch to the three different pages. */
+
+ path = getenv("PATH_INFO");
+ if (NULL == path)
+ path = "";
+ else if ('/' == *path)
+ path++;
+
+ if ('\0' != *path)
+ pg_show(&req, path);
+ else if (NULL != req.q.query)
+ pg_search(&req);
+ else
+ pg_index(&req);
+
+ free(req.q.manpath);
+ free(req.q.arch);
+ free(req.q.sec);
+ free(req.q.query);
+ for (i = 0; i < (int)req.psz; i++)
+ free(req.p[i]);
+ free(req.p);
+ return(EXIT_SUCCESS);
+}
+
+/*
+ * Scan for indexable paths.
+ */
+static void
+pathgen(struct req *req)
+{
+ FILE *fp;
+ char *dp;
+ size_t dpsz;
+
+ if (NULL == (fp = fopen("manpath.conf", "r"))) {
+ fprintf(stderr, "%s/manpath.conf: %s\n",
+ MAN_DIR, strerror(errno));
+ pg_error_internal();
+ exit(EXIT_FAILURE);
+ }
+
+ while (NULL != (dp = fgetln(fp, &dpsz))) {
+ if ('\n' == dp[dpsz - 1])
+ dpsz--;
+ req->p = mandoc_realloc(req->p,
+ (req->psz + 1) * sizeof(char *));
+ dp = mandoc_strndup(dp, dpsz);
+ if ( ! validate_urifrag(dp)) {
+ fprintf(stderr, "%s/manpath.conf contains "
+ "unsafe path \"%s\"\n", MAN_DIR, dp);
+ pg_error_internal();
+ exit(EXIT_FAILURE);
+ }
+ if (NULL != strchr(dp, '/')) {
+ fprintf(stderr, "%s/manpath.conf contains "
+ "path with slash \"%s\"\n", MAN_DIR, dp);
+ pg_error_internal();
+ exit(EXIT_FAILURE);
+ }
+ req->p[req->psz++] = dp;
+ }
+
+ if ( req->p == NULL ) {
+ fprintf(stderr, "%s/manpath.conf is empty\n", MAN_DIR);
+ pg_error_internal();
+ exit(EXIT_FAILURE);
+ }
+}
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