better error message if mandocd is not found

[mandoc.git] / cgi.c

diff --git a/cgi.c b/cgi.c
index 81166e390f84de538261378c930c8d147d34693b..91310ce404b4d2440f60c0508a07c7aa8cc93644 100644 (file)
--- a/cgi.c
+++ b/cgi.c
@@ -1,19 +1,21 @@
-/*     $Id: cgi.c,v 1.101 2014/11/11 19:04:55 schwarze Exp $ */
+/* $Id: cgi.c,v 1.175 2021/08/19 15:23:36 schwarze Exp $ */

 /*
 /*

+ * Copyright (c) 2014-2019, 2021 Ingo Schwarze <schwarze@usta.de>

  * Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * 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.
  *
  *
  * 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
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES

  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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.
  * 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.

+ *
+ * Implementation of the man.cgi(8) program.

  */
 #include "config.h"
 
  */
 #include "config.h"
 


@@ -21,6 +23,9 @@
 #include <sys/time.h>
 
 #include <ctype.h>
 #include <sys/time.h>
 
 #include <ctype.h>

+#if HAVE_ERR
+#include <err.h>
+#endif

 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>


@@ -30,10 +35,14 @@
 #include <string.h>
 #include <unistd.h>
 
 #include <string.h>
 #include <unistd.h>
 

-#include "mandoc.h"

 #include "mandoc_aux.h"
 #include "mandoc_aux.h"

+#include "mandoc.h"
+#include "roff.h"
+#include "mdoc.h"
+#include "man.h"
+#include "mandoc_parse.h"

 #include "main.h"
 #include "main.h"

-#include "manpath.h"
+#include "manconf.h"

 #include "mansearch.h"
 #include "cgi.h"
 
 #include "mansearch.h"
 #include "cgi.h"
 


@@ -52,37 +61,46 @@ struct      req {
        struct query      q;
        char            **p; /* array of available manpaths */
        size_t            psz; /* number of available manpaths */
        struct query      q;
        char            **p; /* array of available manpaths */
        size_t            psz; /* number of available manpaths */

+       int               isquery; /* QUERY_STRING used, not PATH_INFO */
+};
+
+enum   focus {
+       FOCUS_NONE = 0,
+       FOCUS_QUERY

 };
 
 };
 

-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 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 int              http_decode(char *);
+static void             http_encode(const char *);
+static void             parse_manpath_conf(struct req *);
+static void             parse_path_info(struct req *, const char *);
+static void             parse_query_string(struct req *, const char *);

 static void             pg_error_badrequest(const char *);
 static void             pg_error_internal(void);
 static void             pg_index(const 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_noresult(const struct req *, int, const char *,
+                               const char *);
+static void             pg_redirect(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             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_html(int, const char *, const char *);

 static void             resp_begin_http(int, const char *);
 static void             resp_begin_http(int, const char *);

+static void             resp_catman(const struct req *, const char *);
+static void             resp_copy(const char *);

 static void             resp_end_html(void);
 static void             resp_end_html(void);

-static void             resp_searchform(const struct req *);
+static void             resp_format(const struct req *, const char *);
+static void             resp_searchform(const struct req *, enum focus);

 static void             resp_show(const struct req *, const char *);
 static void             set_query_attr(char **, char **);
 static void             resp_show(const struct req *, const char *);
 static void             set_query_attr(char **, char **);

+static int              validate_arch(const char *);

 static int              validate_filename(const char *);
 static int              validate_manpath(const struct req *, const char *);
 static int              validate_urifrag(const 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 char       *scriptname = SCRIPT_NAME;

 
 static const int sec_prios[] = {1, 4, 5, 8, 6, 3, 7, 2, 9};
 static const char *const sec_numbers[] = {
 
 static const int sec_prios[] = {1, 4, 5, 8, 6, 3, 7, 2, 9};
 static const char *const sec_numbers[] = {


@@ -104,17 +122,20 @@ static    const char *const sec_names[] = {
 static const int sec_MAX = sizeof(sec_names) / sizeof(char *);
 
 static const char *const arch_names[] = {
 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"
+    "amd64",       "alpha",       "armv7",       "arm64",
+    "hppa",        "i386",        "landisk",     "loongson",
+    "luna88k",     "macppc",      "mips64",      "octeon",
+    "powerpc64",   "riscv64",     "sparc64",
+
+    "amiga",       "arc",         "armish",      "arm32",
+    "atari",       "aviion",      "beagle",      "cats",
+    "hppa64",      "hp300",
+    "ia64",        "mac68k",      "mvme68k",     "mvme88k",
+    "mvmeppc",     "palm",        "pc532",       "pegasos",
+    "pmax",        "powerpc",     "sgi",         "socppc",
+    "solbourne",   "sparc",
+    "sun3",        "vax",         "wgrisc",      "x68k",
+    "zaurus"

 };
 static const int arch_MAX = sizeof(arch_names) / sizeof(char *);
 
 };
 static const int arch_MAX = sizeof(arch_names) / sizeof(char *);
 


@@ -127,16 +148,16 @@ html_putchar(char c)
 {
 
        switch (c) {
 {
 
        switch (c) {

-       case ('"'):
-               printf("&quote;");
+       case '"':
+               printf("&quot;");

                break;
                break;

-       case ('&'):
+       case '&':

                printf("&amp;");
                break;
                printf("&amp;");
                break;

-       case ('>'):
+       case '>':

                printf("&gt;");
                break;
                printf("&gt;");
                break;

-       case ('<'):
+       case '<':

                printf("&lt;");
                break;
        default:
                printf("&lt;");
                break;
        default:


@@ -145,41 +166,6 @@ html_putchar(char c)
        }
 }
 
        }
 }
 

-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.
 /*
  * Call through to html_putchar().
  * Accepts NULL strings.


@@ -187,7 +173,7 @@ http_print(const char *p)
 static void
 html_print(const char *p)
 {
 static void
 html_print(const char *p)
 {

-       
+

        if (NULL == p)
                return;
        while ('\0' != *p)
        if (NULL == p)
                return;
        while ('\0' != *p)


@@ -216,11 +202,12 @@ set_query_attr(char **attr, char **val)
  * and store the values into the query structure.
  */
 static void
  * and store the values into the query structure.
  */
 static void

-http_parse(struct req *req, const char *qs)
+parse_query_string(struct req *req, const char *qs)

 {
        char            *key, *val;
        size_t           keysz, valsz;
 
 {
        char            *key, *val;
        size_t           keysz, valsz;
 

+       req->isquery    = 1;

        req->q.manpath  = NULL;
        req->q.arch     = NULL;
        req->q.sec      = NULL;
        req->q.manpath  = NULL;
        req->q.arch     = NULL;
        req->q.sec      = NULL;


@@ -298,25 +285,6 @@ next:
                if (*qs != '\0')
                        qs++;
        }
                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);

 }
 
 /*
 }
 
 /*


@@ -337,13 +305,13 @@ http_decode(char *p)
        for ( ; '\0' != *p; p++, q++) {
                if ('%' == *p) {
                        if ('\0' == (hex[0] = *(p + 1)))
        for ( ; '\0' != *p; p++, q++) {
                if ('%' == *p) {
                        if ('\0' == (hex[0] = *(p + 1)))

-                               return(0);
+                               return 0;

                        if ('\0' == (hex[1] = *(p + 2)))
                        if ('\0' == (hex[1] = *(p + 2)))

-                               return(0);
+                               return 0;

                        if (1 != sscanf(hex, "%x", &c))
                        if (1 != sscanf(hex, "%x", &c))

-                               return(0);
+                               return 0;

                        if ('\0' == c)
                        if ('\0' == c)

-                               return(0);
+                               return 0;

 
                        *q = (char)c;
                        p += 2;
 
                        *q = (char)c;
                        p += 2;


@@ -352,7 +320,19 @@ http_decode(char *p)
        }
 
        *q = '\0';
        }
 
        *q = '\0';

-       return(1);
+       return 1;
+}
+
+static void
+http_encode(const char *p)
+{
+       for (; *p != '\0'; p++) {
+               if (isalnum((unsigned char)*p) == 0 &&
+                   strchr("-._~", *p) == NULL)
+                       printf("%%%2.2X", (unsigned char)*p);
+               else
+                       putchar(*p);
+       }

 }
 
 static void
 }
 
 static void


@@ -364,6 +344,8 @@ resp_begin_http(int code, const char *msg)
 
        printf("Content-Type: text/html; charset=utf-8\r\n"
             "Cache-Control: no-cache\r\n"
 
        printf("Content-Type: text/html; charset=utf-8\r\n"
             "Cache-Control: no-cache\r\n"

+            "Content-Security-Policy: default-src 'none'; "
+            "style-src 'self' 'unsafe-inline'\r\n"

             "Pragma: no-cache\r\n"
             "\r\n");
 
             "Pragma: no-cache\r\n"
             "\r\n");
 


@@ -371,130 +353,153 @@ resp_begin_http(int code, const char *msg)
 }
 
 static void
 }
 
 static void

-resp_begin_html(int code, const char *msg)
+resp_copy(const char *filename)
+{
+       char     buf[4096];
+       ssize_t  sz;
+       int      fd;
+
+       if ((fd = open(filename, O_RDONLY)) != -1) {
+               fflush(stdout);
+               while ((sz = read(fd, buf, sizeof(buf))) > 0)
+                       write(STDOUT_FILENO, buf, sz);
+               close(fd);
+       }
+}
+
+static void
+resp_begin_html(int code, const char *msg, const char *file)

 {
 {

+       const char      *name, *sec, *cp;
+       int              namesz, secsz;

 
        resp_begin_http(code, msg);
 
        printf("<!DOCTYPE html>\n"
 
        resp_begin_http(code, msg);
 
        printf("<!DOCTYPE html>\n"

-              "<HTML>\n"
-              "<HEAD>\n"
-              "<META 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);
+              "<html>\n"
+              "<head>\n"
+              "  <meta charset=\"UTF-8\"/>\n"
+              "  <meta name=\"viewport\""
+                     " content=\"width=device-width, initial-scale=1.0\">\n"
+              "  <link rel=\"stylesheet\" href=\"%s/mandoc.css\""
+              " type=\"text/css\" media=\"all\">\n"
+              "  <title>",
+              CSS_DIR);
+       if (file != NULL) {
+               cp = strrchr(file, '/');
+               name = cp == NULL ? file : cp + 1;
+               cp = strrchr(name, '.');
+               namesz = cp == NULL ? strlen(name) : cp - name;
+               sec = NULL;
+               if (cp != NULL && cp[1] != '0') {
+                       sec = cp + 1;
+                       secsz = strlen(sec);
+               } else if (name - file > 1) {
+                       for (cp = name - 2; cp >= file; cp--) {
+                               if (*cp < '1' || *cp > '9')
+                                       continue;
+                               sec = cp;
+                               secsz = name - cp - 1;
+                               break;
+                       }
+               }
+               printf("%.*s", namesz, name);
+               if (sec != NULL)
+                       printf("(%.*s)", secsz, sec);
+               fputs(" - ", stdout);
+       }
+       printf("%s</title>\n"
+              "</head>\n"
+              "<body>\n",
+              CUSTOMIZE_TITLE);
+
+       resp_copy(MAN_DIR "/header.html");

 }
 
 static void
 resp_end_html(void)
 {
 
 }
 
 static void
 resp_end_html(void)
 {
 

-       puts("</BODY>\n"
-            "</HTML>");
+       resp_copy(MAN_DIR "/footer.html");
+
+       puts("</body>\n"
+            "</html>");

 }
 
 static void
 }
 
 static void

-resp_searchform(const struct req *req)
+resp_searchform(const struct req *req, enum focus focus)

 {
        int              i;
 
 {
        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",
+       printf("<form action=\"/%s\" method=\"get\" "
+              "autocomplete=\"off\" autocapitalize=\"none\">\n"
+              "  <fieldset>\n"
+              "    <legend>Manual Page Search Parameters</legend>\n",

               scriptname);
 
        /* Write query input box. */
 
               scriptname);
 
        /* Write query input box. */
 

-       printf( "<TABLE><TR><TD>\n"
-               "<INPUT TYPE=\"text\" NAME=\"query\" VALUE=\"");
-       if (NULL != req->q.query)
+       printf("    <input type=\"search\" name=\"query\" value=\"");
+       if (req->q.query != NULL)

                html_print(req->q.query);
                html_print(req->q.query);

-       puts("\" SIZE=\"40\">");
+       printf( "\" size=\"40\"");
+       if (focus == FOCUS_QUERY)
+               printf(" autofocus");
+       puts(">");

 
 

-       /* Write submission and reset buttons. */
+       /* Write submission 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");
+       printf( "    <button type=\"submit\" name=\"apropos\" value=\"0\">"
+               "man</button>\n"
+               "    <button type=\"submit\" name=\"apropos\" value=\"1\">"
+               "apropos</button>\n"
+               "    <br/>\n");

 
        /* Write section selector. */
 
 
        /* Write section selector. */
 

-       puts(   "</TD></TR><TR><TD>\n"
-               "<SELECT NAME=\"sec\">");
+       puts("    <select name=\"sec\">");

        for (i = 0; i < sec_MAX; i++) {
        for (i = 0; i < sec_MAX; i++) {

-               printf("<OPTION VALUE=\"%s\"", sec_numbers[i]);
+               printf("      <option value=\"%s\"", sec_numbers[i]);

                if (NULL != req->q.sec &&
                    0 == strcmp(sec_numbers[i], req->q.sec))
                if (NULL != req->q.sec &&
                    0 == strcmp(sec_numbers[i], req->q.sec))

-                       printf(" SELECTED=\"selected\"");
-               printf(">%s</OPTION>\n", sec_names[i]);
+                       printf(" selected=\"selected\"");
+               printf(">%s</option>\n", sec_names[i]);

        }
        }

-       puts("</SELECT>");
+       puts("    </select>");

 
        /* Write architecture selector. */
 
 
        /* Write architecture selector. */
 

-       printf( "<SELECT NAME=\"arch\">\n"
-               "<OPTION VALUE=\"default\"");
+       printf( "    <select name=\"arch\">\n"
+               "      <option value=\"default\"");

        if (NULL == req->q.arch)
        if (NULL == req->q.arch)

-               printf(" SELECTED=\"selected\"");
-       puts(">All Architectures</OPTION>");
+               printf(" selected=\"selected\"");
+       puts(">All Architectures</option>");

        for (i = 0; i < arch_MAX; i++) {
        for (i = 0; i < arch_MAX; i++) {

-               printf("<OPTION VALUE=\"%s\"", arch_names[i]);
+               printf("      <option");

                if (NULL != req->q.arch &&
                    0 == strcmp(arch_names[i], req->q.arch))
                if (NULL != req->q.arch &&
                    0 == strcmp(arch_names[i], req->q.arch))

-                       printf(" SELECTED=\"selected\"");
-               printf(">%s</OPTION>\n", arch_names[i]);
+                       printf(" selected=\"selected\"");
+               printf(">%s</option>\n", arch_names[i]);

        }
        }

-       puts("</SELECT>");
+       puts("    </select>");

 
        /* Write manpath selector. */
 
        if (req->psz > 1) {
 
        /* Write manpath selector. */
 
        if (req->psz > 1) {

-               puts("<SELECT NAME=\"manpath\">");
+               puts("    <select name=\"manpath\">");

                for (i = 0; i < (int)req->psz; i++) {
                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=\"");
+                       printf("      <option");
+                       if (strcmp(req->q.manpath, req->p[i]) == 0)
+                               printf(" selected=\"selected\"");
+                       printf(">");

                        html_print(req->p[i]);
                        html_print(req->p[i]);

-                       printf("\">");
-                       html_print(req->p[i]);
-                       puts("</OPTION>");
+                       puts("</option>");

                }
                }

-               puts("</SELECT>");
+               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. //-->");
+       puts("  </fieldset>\n"
+            "</form>");

 }
 
 static int
 }
 
 static int


@@ -505,10 +510,10 @@ validate_urifrag(const char *frag)
                if ( ! (isalnum((unsigned char)*frag) ||
                    '-' == *frag || '.' == *frag ||
                    '/' == *frag || '_' == *frag))
                if ( ! (isalnum((unsigned char)*frag) ||
                    '-' == *frag || '.' == *frag ||
                    '/' == *frag || '_' == *frag))

-                       return(0);
+                       return 0;

                frag++;
        }
                frag++;
        }

-       return(1);
+       return 1;

 }
 
 static int
 }
 
 static int


@@ -516,14 +521,23 @@ validate_manpath(const struct req *req, const char* manpath)
 {
        size_t   i;
 
 {
        size_t   i;
 

-       if ( ! strcmp(manpath, "mandoc"))
-               return(1);
-

        for (i = 0; i < req->psz; i++)
                if ( ! strcmp(manpath, req->p[i]))
        for (i = 0; i < req->psz; i++)
                if ( ! strcmp(manpath, req->p[i]))

-                       return(1);
+                       return 1;

 
 

-       return(0);
+       return 0;
+}
+
+static int
+validate_arch(const char *arch)
+{
+       int      i;
+
+       for (i = 0; i < arch_MAX; i++)
+               if (strcmp(arch, arch_names[i]) == 0)
+                       return 1;
+
+       return 0;

 }
 
 static int
 }
 
 static int


@@ -533,35 +547,37 @@ validate_filename(const char *file)
        if ('.' == file[0] && '/' == file[1])
                file += 2;
 
        if ('.' == file[0] && '/' == file[1])
                file += 2;
 

-       return ( ! (strstr(file, "../") || strstr(file, "/..") ||
-           (strncmp(file, "man", 3) && strncmp(file, "cat", 3))));
+       return ! (strstr(file, "../") || strstr(file, "/..") ||
+           (strncmp(file, "man", 3) && strncmp(file, "cat", 3)));

 }
 
 static void
 pg_index(const struct req *req)
 {
 
 }
 
 static void
 pg_index(const struct req *req)
 {
 

-       resp_begin_html(200, NULL);
-       resp_searchform(req);
-       printf("<P>\n"
+       resp_begin_html(200, NULL, NULL);
+       resp_searchform(req, FOCUS_QUERY);
+       printf("<p>\n"

               "This web interface is documented in the\n"
               "This web interface is documented in the\n"

-              "<A HREF=\"%s/mandoc/man8/man.cgi.8\">man.cgi</A>\n"
+              "<a class=\"Xr\" href=\"/%s%sman.cgi.8\">man.cgi(8)</a>\n"

               "manual, and the\n"
               "manual, and the\n"

-              "<A HREF=\"%s/mandoc/man1/apropos.1\">apropos</A>\n"
+              "<a class=\"Xr\" href=\"/%s%sapropos.1\">apropos(1)</a>\n"

               "manual explains the query syntax.\n"
               "manual explains the query syntax.\n"

-              "</P>\n",
-              scriptname, scriptname);
+              "</p>\n",
+              scriptname, *scriptname == '\0' ? "" : "/",
+              scriptname, *scriptname == '\0' ? "" : "/");

        resp_end_html();
 }
 
 static void
        resp_end_html();
 }
 
 static void

-pg_noresult(const struct req *req, const char *msg)
+pg_noresult(const struct req *req, int code, const char *http_msg,
+    const char *user_msg)

 {
 {

-       resp_begin_html(200, NULL);
-       resp_searchform(req);
-       puts("<P>");
-       puts(msg);
-       puts("</P>");
+       resp_begin_html(code, http_msg, NULL);
+       resp_searchform(req, FOCUS_QUERY);
+       puts("<p>");
+       puts(user_msg);
+       puts("</p>");

        resp_end_html();
 }
 
        resp_end_html();
 }
 


@@ -569,103 +585,101 @@ static void
 pg_error_badrequest(const char *msg)
 {
 
 pg_error_badrequest(const char *msg)
 {
 

-       resp_begin_html(400, "Bad Request");
-       puts("<H1>Bad Request</H1>\n"
-            "<P>\n");
+       resp_begin_html(400, "Bad Request", NULL);
+       puts("<h1>Bad Request</h1>\n"
+            "<p>\n");

        puts(msg);
        printf("Try again from the\n"
        puts(msg);
        printf("Try again from the\n"

-              "<A HREF=\"%s\">main page</A>.\n"
-              "</P>", scriptname);
+              "<a href=\"/%s\">main page</a>.\n"
+              "</p>", scriptname);

        resp_end_html();
 }
 
 static void
 pg_error_internal(void)
 {
        resp_end_html();
 }
 
 static void
 pg_error_internal(void)
 {

-       resp_begin_html(500, "Internal Server Error");
-       puts("<P>Internal Server Error</P>");
+       resp_begin_html(500, "Internal Server Error", NULL);
+       puts("<p>Internal Server Error</p>");

        resp_end_html();
 }
 
        resp_end_html();
 }
 

+static void
+pg_redirect(const struct req *req, const char *name)
+{
+       printf("Status: 303 See Other\r\n"
+           "Location: /");
+       if (*scriptname != '\0')
+               printf("%s/", scriptname);
+       if (strcmp(req->q.manpath, req->p[0]))
+               printf("%s/", req->q.manpath);
+       if (req->q.arch != NULL)
+               printf("%s/", req->q.arch);
+       http_encode(name);
+       if (req->q.sec != NULL) {
+               putchar('.');
+               http_encode(req->q.sec);
+       }
+       printf("\r\nContent-Type: text/html; charset=utf-8\r\n\r\n");
+}
+

 static void
 pg_searchres(const struct req *req, struct manpage *r, size_t sz)
 {
        char            *arch, *archend;
 static void
 pg_searchres(const struct req *req, struct manpage *r, size_t sz)
 {
        char            *arch, *archend;

-       size_t           i, iuse, isec;
+       const char      *sec;
+       size_t           i, iuse;

        int              archprio, archpriouse;
        int              prio, priouse;
        int              archprio, archpriouse;
        int              prio, priouse;

-       char             sec;

 
        for (i = 0; i < sz; i++) {
                if (validate_filename(r[i].file))
                        continue;
 
        for (i = 0; i < sz; i++) {
                if (validate_filename(r[i].file))
                        continue;

-               fprintf(stderr, "invalid filename %s in %s database\n",
+               warnx("invalid filename %s in %s database",

                    r[i].file, req->q.manpath);
                pg_error_internal();
                return;
        }
 
                    r[i].file, req->q.manpath);
                pg_error_internal();
                return;
        }
 

-       if (1 == sz) {
+       if (req->isquery && sz == 1) {

                /*
                 * If we have just one result, then jump there now
                 * without any delay.
                 */
                /*
                 * 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");
+               printf("Status: 303 See Other\r\n"
+                   "Location: /");
+               if (*scriptname != '\0')
+                       printf("%s/", scriptname);
+               if (strcmp(req->q.manpath, req->p[0]))
+                       printf("%s/", req->q.manpath);
+               printf("%s\r\n"
+                   "Content-Type: text/html; charset=utf-8\r\n\r\n",
+                   r[0].file);

                return;
        }
 
                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.
         */
 
        /*
         * 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;
+       iuse = 0;
+       if (req->q.equal || sz == 1) {
+               priouse = 20;

                archpriouse = 3;
                for (i = 0; i < sz; i++) {
                archpriouse = 3;
                for (i = 0; i < sz; i++) {

-                       isec = strcspn(r[i].file, "123456789");
-                       sec = r[i].file[isec];
-                       if ('\0' == sec)
+                       sec = r[i].file;
+                       sec += strcspn(sec, "123456789");
+                       if (sec[0] == '\0')

                                continue;
                                continue;

-                       prio = sec_prios[sec - '1'];
-                       if (NULL == req->q.arch) {
+                       prio = sec_prios[sec[0] - '1'];
+                       if (sec[1] != '/')
+                               prio += 10;
+                       if (req->q.arch == NULL) {

                                archprio =
                                archprio =

-                                   (NULL == (arch = strchr(
-                                       r[i].file + isec, '/'))) ? 3 :
-                                   (NULL == (archend = strchr(
-                                       arch + 1, '/'))) ? 0 :
+                                   ((arch = strchr(sec + 1, '/'))
+                                       == NULL) ? 3 :
+                                   ((archend = strchr(arch + 1, '/'))
+                                       == NULL) ? 0 :

                                    strncmp(arch, "amd64/",
                                        archend - arch) ? 2 : 1;
                                if (archprio < archpriouse) {
                                    strncmp(arch, "amd64/",
                                        archend - arch) ? 2 : 1;
                                if (archprio < archpriouse) {


@@ -682,6 +696,36 @@ pg_searchres(const struct req *req, struct manpage *r, size_t sz)
                        priouse = prio;
                        iuse = i;
                }
                        priouse = prio;
                        iuse = i;
                }

+               resp_begin_html(200, NULL, r[iuse].file);
+       } else
+               resp_begin_html(200, NULL, NULL);
+
+       resp_searchform(req,
+           req->q.equal || sz == 1 ? FOCUS_NONE : FOCUS_QUERY);
+
+       if (sz > 1) {
+               puts("<table class=\"results\">");
+               for (i = 0; i < sz; i++) {
+                       printf("  <tr>\n"
+                              "    <td>"
+                              "<a class=\"Xr\" href=\"/");
+                       if (*scriptname != '\0')
+                               printf("%s/", scriptname);
+                       if (strcmp(req->q.manpath, req->p[0]))
+                               printf("%s/", req->q.manpath);
+                       printf("%s\">", r[i].file);
+                       html_print(r[i].names);
+                       printf("</a></td>\n"
+                              "    <td><span class=\"Nd\">");
+                       html_print(r[i].output);
+                       puts("</span></td>\n"
+                            "  </tr>");
+               }
+               puts("</table>");
+       }
+
+       if (req->q.equal || sz == 1) {
+               puts("<hr>");

                resp_show(req, r[iuse].file);
        }
 
                resp_show(req, r[iuse].file);
        }
 


@@ -689,26 +733,30 @@ pg_searchres(const struct req *req, struct manpage *r, size_t sz)
 }
 
 static void
 }
 
 static void

-catman(const struct req *req, const char *file)
+resp_catman(const struct req *req, const char *file)

 {
        FILE            *f;
 {
        FILE            *f;

-       size_t           len;
-       int              i;

        char            *p;
        char            *p;

+       size_t           sz;
+       ssize_t          len;
+       int              i;

        int              italic, bold;
 
        int              italic, bold;
 

-       if (NULL == (f = fopen(file, "r"))) {
-               puts("<P>You specified an invalid manual file.</P>");
+       if ((f = fopen(file, "r")) == NULL) {
+               puts("<p>You specified an invalid manual file.</p>");

                return;
        }
 
                return;
        }
 

-       puts("<DIV CLASS=\"catman\">\n"
-            "<PRE>");
+       puts("<div class=\"catman\">\n"
+            "<pre>");

 
 

-       while (NULL != (p = fgetln(f, &len))) {
+       p = NULL;
+       sz = 0;
+
+       while ((len = getline(&p, &sz, f)) != -1) {

                bold = italic = 0;
                bold = italic = 0;

-               for (i = 0; i < (int)len - 1; i++) {
-                       /* 
+               for (i = 0; i < len - 1; i++) {
+                       /*

                         * This means that the catpage is out of state.
                         * Ignore it and keep going (although the
                         * catpage is bogus).
                         * This means that the catpage is out of state.
                         * Ignore it and keep going (although the
                         * catpage is bogus).


@@ -726,22 +774,22 @@ catman(const struct req *req, const char *file)
 
                        if ('\b' != p[i + 1]) {
                                if (italic)
 
                        if ('\b' != p[i + 1]) {
                                if (italic)

-                                       printf("</I>");
+                                       printf("</i>");

                                if (bold)
                                if (bold)

-                                       printf("</B>");
+                                       printf("</b>");

                                italic = bold = 0;
                                html_putchar(p[i]);
                                continue;
                                italic = bold = 0;
                                html_putchar(p[i]);
                                continue;

-                       } else if (i + 2 >= (int)len)
+                       } else if (i + 2 >= len)

                                continue;
 
                        /* Italic mode. */
 
                        if ('_' == p[i]) {
                                if (bold)
                                continue;
 
                        /* Italic mode. */
 
                        if ('_' == p[i]) {
                                if (bold)

-                                       printf("</B>");
+                                       printf("</b>");

                                if ( ! italic)
                                if ( ! italic)

-                                       printf("<I>");
+                                       printf("<i>");

                                bold = 0;
                                italic = 1;
                                i += 2;
                                bold = 0;
                                italic = 1;
                                i += 2;


@@ -749,7 +797,7 @@ catman(const struct req *req, const char *file)
                                continue;
                        }
 
                                continue;
                        }
 

-                       /* 
+                       /*

                         * Handle funny behaviour troff-isms.
                         * These grok'd from the original man2html.c.
                         */
                         * Handle funny behaviour troff-isms.
                         * These grok'd from the original man2html.c.
                         */


@@ -763,9 +811,9 @@ catman(const struct req *req, const char *file)
                                        ('*' == p[i] && '|' == p[i + 2]) ||
                                        ('|' == p[i] && '*' == p[i + 2]))  {
                                if (italic)
                                        ('*' == p[i] && '|' == p[i + 2]) ||
                                        ('|' == p[i] && '*' == p[i + 2]))  {
                                if (italic)

-                                       printf("</I>");
+                                       printf("</i>");

                                if (bold)
                                if (bold)

-                                       printf("</B>");
+                                       printf("</b>");

                                italic = bold = 0;
                                putchar('*');
                                i += 2;
                                italic = bold = 0;
                                putchar('*');
                                i += 2;


@@ -777,9 +825,9 @@ catman(const struct req *req, const char *file)
                                        ('+' == p[i] && '|' == p[i + 1]) ||
                                        ('|' == p[i] && '+' == p[i + 1]))  {
                                if (italic)
                                        ('+' == p[i] && '|' == p[i + 1]) ||
                                        ('|' == p[i] && '+' == p[i + 1]))  {
                                if (italic)

-                                       printf("</I>");
+                                       printf("</i>");

                                if (bold)
                                if (bold)

-                                       printf("</B>");
+                                       printf("</b>");

                                italic = bold = 0;
                                putchar('+');
                                i += 2;
                                italic = bold = 0;
                                putchar('+');
                                i += 2;


@@ -787,100 +835,81 @@ catman(const struct req *req, const char *file)
                        }
 
                        /* Bold mode. */
                        }
 
                        /* Bold mode. */

-                       
+

                        if (italic)
                        if (italic)

-                               printf("</I>");
+                               printf("</i>");

                        if ( ! bold)
                        if ( ! bold)

-                               printf("<B>");
+                               printf("<b>");

                        bold = 1;
                        italic = 0;
                        i += 2;
                        html_putchar(p[i]);
                }
 
                        bold = 1;
                        italic = 0;
                        i += 2;
                        html_putchar(p[i]);
                }
 

-               /* 
+               /*

                 * Clean up the last character.
                 * Clean up the last character.

-                * We can get to a newline; don't print that. 
+                * We can get to a newline; don't print that.

                 */
 
                if (italic)
                 */
 
                if (italic)

-                       printf("</I>");
+                       printf("</i>");

                if (bold)
                if (bold)

-                       printf("</B>");
+                       printf("</b>");

 
 

-               if (i == (int)len - 1 && '\n' != p[i])
+               if (i == len - 1 && p[i] != '\n')

                        html_putchar(p[i]);
 
                putchar('\n');
        }
                        html_putchar(p[i]);
 
                putchar('\n');
        }

+       free(p);

 
 

-       puts("</PRE>\n"
-            "</DIV>");
+       puts("</pre>\n"
+            "</div>");

 
        fclose(f);
 }
 
 static void
 
        fclose(f);
 }
 
 static void

-format(const struct req *req, const char *file)
+resp_format(const struct req *req, const char *file)

 {
 {

+       struct manoutput conf;

        struct mparse   *mp;
        struct mparse   *mp;

-       struct mchars   *mchars;
-       struct mdoc     *mdoc;
-       struct man      *man;
+       struct roff_meta *meta;

        void            *vp;
        void            *vp;

-       char            *opts;
-       enum mandoclevel rc;

        int              fd;
        int              usepath;
 
        if (-1 == (fd = open(file, O_RDONLY, 0))) {
        int              fd;
        int              usepath;
 
        if (-1 == (fd = open(file, O_RDONLY, 0))) {

-               puts("<P>You specified an invalid manual file.</P>");
+               puts("<p>You specified an invalid manual file.</p>");

                return;
        }
 
                return;
        }
 

-       mchars = mchars_alloc();
-       mp = mparse_alloc(MPARSE_SO, MANDOCLEVEL_FATAL, NULL,
-           mchars, req->q.manpath);
-       rc = mparse_readfd(mp, fd, file);
+       mchars_alloc();
+       mp = mparse_alloc(MPARSE_SO | MPARSE_UTF8 | MPARSE_LATIN1 |
+           MPARSE_VALIDATE, MANDOC_OS_OTHER, req->q.manpath);
+       mparse_readfd(mp, fd, file);

        close(fd);
        close(fd);

+       meta = mparse_result(mp);

 
 

-       if (rc >= MANDOCLEVEL_FATAL) {
-               fprintf(stderr, "fatal mandoc error: %s/%s\n",
-                   req->q.manpath, file);
-               pg_error_internal();
-               return;
-       }
-
+       memset(&conf, 0, sizeof(conf));
+       conf.fragment = 1;
+       conf.style = mandoc_strdup(CSS_DIR "/mandoc.css");

        usepath = strcmp(req->q.manpath, req->p[0]);
        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);
-               mchars_free(mchars);
-               return;
-       }
+       mandoc_asprintf(&conf.man, "/%s%s%s%s%%N.%%S",
+           scriptname, *scriptname == '\0' ? "" : "/",
+           usepath ? req->q.manpath : "", usepath ? "/" : "");

 
 

-       vp = html_alloc(mchars, opts);
-
-       if (NULL != mdoc)
-               html_mdoc(vp, mdoc);
+       vp = html_alloc(&conf);
+       if (meta->macroset == MACROSET_MDOC)
+               html_mdoc(vp, meta);

        else
        else

-               html_man(vp, man);
+               html_man(vp, meta);

 
        html_free(vp);
        mparse_free(mp);
 
        html_free(vp);
        mparse_free(mp);

-       mchars_free(mchars);
-       free(opts);
+       mchars_free();
+       free(conf.man);
+       free(conf.style);

 }
 
 static void
 }
 
 static void


@@ -891,9 +920,9 @@ resp_show(const struct req *req, const char *file)
                file += 2;
 
        if ('c' == *file)
                file += 2;
 
        if ('c' == *file)

-               catman(req, file);
+               resp_catman(req, file);

        else
        else

-               format(req, file);
+               resp_format(req, file);

 }
 
 static void
 }
 
 static void


@@ -906,7 +935,7 @@ pg_show(struct req *req, const char *fullpath)
                pg_error_badrequest(
                    "You did not specify a page to show.");
                return;
                pg_error_badrequest(
                    "You did not specify a page to show.");
                return;

-       } 
+       }

        manpath = mandoc_strndup(fullpath, file - fullpath);
        file++;
 
        manpath = mandoc_strndup(fullpath, file - fullpath);
        file++;
 


@@ -924,18 +953,12 @@ pg_show(struct req *req, const char *fullpath)
         */
 
        if (chdir(manpath) == -1) {
         */
 
        if (chdir(manpath) == -1) {

-               fprintf(stderr, "chdir %s: %s\n",
-                   manpath, strerror(errno));
+               warn("chdir %s", manpath);

                pg_error_internal();
                free(manpath);
                return;
        }
                pg_error_internal();
                free(manpath);
                return;
        }

-
-       if (strcmp(manpath, "mandoc")) {
-               free(req->q.manpath);
-               req->q.manpath = manpath;
-       } else
-               free(manpath);
+       free(manpath);

 
        if ( ! validate_filename(file)) {
                pg_error_badrequest(
 
        if ( ! validate_filename(file)) {
                pg_error_badrequest(


@@ -943,8 +966,8 @@ pg_show(struct req *req, const char *fullpath)
                return;
        }
 
                return;
        }
 

-       resp_begin_html(200, NULL);
-       resp_searchform(req);
+       resp_begin_html(200, NULL, file);
+       resp_searchform(req, FOCUS_NONE);

        resp_show(req, file);
        resp_end_html();
 }
        resp_show(req, file);
        resp_end_html();
 }


@@ -966,9 +989,8 @@ pg_search(const struct req *req)
         * relative to the manpath root.
         */
 
         * relative to the manpath root.
         */
 

-       if (-1 == (chdir(req->q.manpath))) {
-               fprintf(stderr, "chdir %s: %s\n",
-                   req->q.manpath, strerror(errno));
+       if (chdir(req->q.manpath) == -1) {
+               warn("chdir %s", req->q.manpath);

                pg_error_internal();
                return;
        }
                pg_error_internal();
                return;
        }


@@ -1014,10 +1036,15 @@ pg_search(const struct req *req)
                }
        }
 
                }
        }
 

-       if (0 == mansearch(&search, &paths, argc, argv, &res, &ressz))
-               pg_noresult(req, "You entered an invalid query.");
-       else if (0 == ressz)
-               pg_noresult(req, "No results found.");
+       res = NULL;
+       ressz = 0;
+       if (req->isquery && req->q.equal && argc == 1)
+               pg_redirect(req, argv[0]);
+       else if (mansearch(&search, &paths, argc, argv, &res, &ressz) == 0)
+               pg_noresult(req, 400, "Bad Request",
+                   "You entered an invalid query.");
+       else if (ressz == 0)
+               pg_noresult(req, 404, "Not Found", "No results found.");

        else
                pg_searchres(req, res, ressz);
 
        else
                pg_searchres(req, res, ressz);
 


@@ -1036,6 +1063,22 @@ main(void)
        const char      *querystring;
        int              i;
 
        const char      *querystring;
        int              i;
 

+#if HAVE_PLEDGE
+       /*
+        * The "rpath" pledge could be revoked after mparse_readfd()
+        * if the file desciptor to "/footer.html" would be opened
+        * up front, but it's probably not worth the complication
+        * of the code it would cause: it would require scattering
+        * pledge() calls in multiple low-level resp_*() functions.
+        */
+
+       if (pledge("stdio rpath", NULL) == -1) {
+               warn("pledge");
+               pg_error_internal();
+               return EXIT_FAILURE;
+       }
+#endif
+

        /* Poor man's ReDoS mitigation. */
 
        itimer.it_value.tv_sec = 2;
        /* Poor man's ReDoS mitigation. */
 
        itimer.it_value.tv_sec = 2;


@@ -1043,21 +1086,9 @@ main(void)
        itimer.it_interval.tv_sec = 2;
        itimer.it_interval.tv_usec = 0;
        if (setitimer(ITIMER_VIRTUAL, &itimer, NULL) == -1) {
        itimer.it_interval.tv_sec = 2;
        itimer.it_interval.tv_usec = 0;
        if (setitimer(ITIMER_VIRTUAL, &itimer, NULL) == -1) {

-               fprintf(stderr, "setitimer: %s\n", strerror(errno));
+               warn("setitimer");

                pg_error_internal();
                pg_error_internal();

-               return(EXIT_FAILURE);
-       }
-
-       /* 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);
+               return EXIT_FAILURE;

        }
 
        /*
        }
 
        /*


@@ -1066,42 +1097,49 @@ main(void)
         * relative to the same position.
         */
 
         * relative to the same position.
         */
 

-       if (-1 == chdir(MAN_DIR)) {
-               fprintf(stderr, "MAN_DIR: %s: %s\n",
-                   MAN_DIR, strerror(errno));
+       if (chdir(MAN_DIR) == -1) {
+               warn("MAN_DIR: %s", MAN_DIR);

                pg_error_internal();
                pg_error_internal();

-               return(EXIT_FAILURE);
-       } 
+               return EXIT_FAILURE;
+       }

 
        memset(&req, 0, sizeof(struct req));
 
        memset(&req, 0, sizeof(struct req));

-       pathgen(&req);
+       req.q.equal = 1;
+       parse_manpath_conf(&req);

 
 

-       /* Next parse out the query string. */
+       /* Parse the path info and the query string. */

 
 

-       if (NULL != (querystring = getenv("QUERY_STRING")))
-               http_parse(&req, querystring);
+       if ((path = getenv("PATH_INFO")) == NULL)
+               path = "";
+       else if (*path == '/')
+               path++;
+
+       if (*path != '\0') {
+               parse_path_info(&req, path);
+               if (req.q.manpath == NULL || req.q.sec == NULL ||
+                   *req.q.query == '\0' || access(path, F_OK) == -1)
+                       path = "";
+       } else if ((querystring = getenv("QUERY_STRING")) != NULL)
+               parse_query_string(&req, querystring);

 
 

-       if ( ! (NULL == req.q.manpath ||
-           validate_manpath(&req, req.q.manpath))) {
+       /* Validate parsed data and add defaults. */
+
+       if (req.q.manpath == NULL)
+               req.q.manpath = mandoc_strdup(req.p[0]);
+       else if ( ! validate_manpath(&req, req.q.manpath)) {

                pg_error_badrequest(
                    "You specified an invalid manpath.");
                pg_error_badrequest(
                    "You specified an invalid manpath.");

-               return(EXIT_FAILURE);
+               return EXIT_FAILURE;

        }
 
        }
 

-       if ( ! (NULL == req.q.arch || validate_urifrag(req.q.arch))) {
+       if (req.q.arch != NULL && validate_arch(req.q.arch) == 0) {

                pg_error_badrequest(
                    "You specified an invalid architecture.");
                pg_error_badrequest(
                    "You specified an invalid architecture.");

-               return(EXIT_FAILURE);
+               return EXIT_FAILURE;

        }
 
        /* Dispatch to the three different pages. */
 
        }
 
        /* 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)
        if ('\0' != *path)
                pg_show(&req, path);
        else if (NULL != req.q.query)


@@ -1116,49 +1154,125 @@ main(void)
        for (i = 0; i < (int)req.psz; i++)
                free(req.p[i]);
        free(req.p);
        for (i = 0; i < (int)req.psz; i++)
                free(req.p[i]);
        free(req.p);

-       return(EXIT_SUCCESS);
+       return EXIT_SUCCESS;
+}
+
+/*
+ * Translate PATH_INFO to a query.
+ */
+static void
+parse_path_info(struct req *req, const char *path)
+{
+       const char      *name, *sec, *end;
+
+       req->isquery = 0;
+       req->q.equal = 1;
+       req->q.manpath = NULL;
+       req->q.arch = NULL;
+
+       /* Mandatory manual page name. */
+       if ((name = strrchr(path, '/')) == NULL)
+               name = path;
+       else
+               name++;
+
+       /* Optional trailing section. */
+       sec = strrchr(name, '.');
+       if (sec != NULL && isdigit((unsigned char)*++sec)) {
+               req->q.query = mandoc_strndup(name, sec - name - 1);
+               req->q.sec = mandoc_strdup(sec);
+       } else {
+               req->q.query = mandoc_strdup(name);
+               req->q.sec = NULL;
+       }
+
+       /* Handle the case of name[.section] only. */
+       if (name == path)
+               return;
+
+       /* Optional manpath. */
+       end = strchr(path, '/');
+       req->q.manpath = mandoc_strndup(path, end - path);
+       if (validate_manpath(req, req->q.manpath)) {
+               path = end + 1;
+               if (name == path)
+                       return;
+       } else {
+               free(req->q.manpath);
+               req->q.manpath = NULL;
+       }
+
+       /* Optional section. */
+       if (strncmp(path, "man", 3) == 0 || strncmp(path, "cat", 3) == 0) {
+               path += 3;
+               end = strchr(path, '/');
+               free(req->q.sec);
+               req->q.sec = mandoc_strndup(path, end - path);
+               path = end + 1;
+               if (name == path)
+                       return;
+       }
+
+       /* Optional architecture. */
+       end = strchr(path, '/');
+       if (end + 1 != name) {
+               pg_error_badrequest(
+                   "You specified too many directory components.");
+               exit(EXIT_FAILURE);
+       }
+       req->q.arch = mandoc_strndup(path, end - path);
+       if (validate_arch(req->q.arch) == 0) {
+               pg_error_badrequest(
+                   "You specified an invalid directory component.");
+               exit(EXIT_FAILURE);
+       }

 }
 
 /*
  * Scan for indexable paths.
  */
 static void
 }
 
 /*
  * Scan for indexable paths.
  */
 static void

-pathgen(struct req *req)
+parse_manpath_conf(struct req *req)

 {
        FILE    *fp;
        char    *dp;
        size_t   dpsz;
 {
        FILE    *fp;
        char    *dp;
        size_t   dpsz;

+       ssize_t  len;

 
 

-       if (NULL == (fp = fopen("manpath.conf", "r"))) {
-               fprintf(stderr, "%s/manpath.conf: %s\n",
-                       MAN_DIR, strerror(errno));
+       if ((fp = fopen("manpath.conf", "r")) == NULL) {
+               warn("%s/manpath.conf", MAN_DIR);

                pg_error_internal();
                exit(EXIT_FAILURE);
        }
 
                pg_error_internal();
                exit(EXIT_FAILURE);
        }
 

-       while (NULL != (dp = fgetln(fp, &dpsz))) {
-               if ('\n' == dp[dpsz - 1])
-                       dpsz--;
+       dp = NULL;
+       dpsz = 0;
+
+       while ((len = getline(&dp, &dpsz, fp)) != -1) {
+               if (dp[len - 1] == '\n')
+                       dp[--len] = '\0';

                req->p = mandoc_realloc(req->p,
                    (req->psz + 1) * sizeof(char *));
                req->p = mandoc_realloc(req->p,
                    (req->psz + 1) * sizeof(char *));

-               dp = mandoc_strndup(dp, dpsz);

                if ( ! validate_urifrag(dp)) {
                if ( ! validate_urifrag(dp)) {

-                       fprintf(stderr, "%s/manpath.conf contains "
-                           "unsafe path \"%s\"\n", MAN_DIR, dp);
+                       warnx("%s/manpath.conf contains "
+                           "unsafe path \"%s\"", MAN_DIR, dp);

                        pg_error_internal();
                        exit(EXIT_FAILURE);
                }
                        pg_error_internal();
                        exit(EXIT_FAILURE);
                }

-               if (NULL != strchr(dp, '/')) {
-                       fprintf(stderr, "%s/manpath.conf contains "
-                           "path with slash \"%s\"\n", MAN_DIR, dp);
+               if (strchr(dp, '/') != NULL) {
+                       warnx("%s/manpath.conf contains "
+                           "path with slash \"%s\"", MAN_DIR, dp);

                        pg_error_internal();
                        exit(EXIT_FAILURE);
                }
                req->p[req->psz++] = dp;
                        pg_error_internal();
                        exit(EXIT_FAILURE);
                }
                req->p[req->psz++] = dp;

+               dp = NULL;
+               dpsz = 0;

        }
        }

+       free(dp);

 
 

-       if ( req->p == NULL ) {
-               fprintf(stderr, "%s/manpath.conf is empty\n", MAN_DIR);
+       if (req->p == NULL) {
+               warnx("%s/manpath.conf is empty", MAN_DIR);

                pg_error_internal();
                exit(EXIT_FAILURE);
        }
                pg_error_internal();
                exit(EXIT_FAILURE);
        }