httpd: add -i (inetd) and -f (foreground) otions.

-i makes possible to run httpd in both inetd and standalone mode
without recompile (or need to have two different binaries)


git-svn-id: svn://busybox.net/trunk/busybox@16538 69ca8d6d-28ef-0310-b511-8ec308f3f277

3 files changed, 56 insertions, 90 deletions

diff --git a/include/usage.h b/include/usage.h
index db41a8e79..ef3fb63d3 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -1184,7 +1184,8 @@ USE_FEATURE_DATE_ISOFMT( \
 
 #define httpd_trivial_usage \
         "[-c <conf file>]" \
-        USE_FEATURE_HTTPD_WITHOUT_INETD(" [-p <port>]") \
+        " [-p <port>]" \
+        " [-i] [-f]" \
         USE_FEATURE_HTTPD_SETUID(" [-u user[:grp]]") \
         USE_FEATURE_HTTPD_BASIC_AUTH(" [-r <realm>]") \
         USE_FEATURE_HTTPD_AUTH_MD5(" [-m pass]") \
@@ -1194,7 +1195,9 @@ USE_FEATURE_DATE_ISOFMT( \
         "Listens for incoming http server requests.\n\n" \
         "Options:\n" \
         "\t-c FILE\t\tSpecifies configuration file. (default httpd.conf)\n" \
-        USE_FEATURE_HTTPD_WITHOUT_INETD("\t-p PORT\t\tServer port (default 80)\n") \
+        "\t-p PORT\t\tServer port (default 80)\n" \
+        "\t-i\t\tAssume that we are started frim inetd\n" \
+        "\t-f\t\tDo not daemonize\n" \
         USE_FEATURE_HTTPD_SETUID("\t-u USER[:GRP]\tSet uid/gid after binding to port\n") \
         USE_FEATURE_HTTPD_BASIC_AUTH("\t-r REALM\tAuthentication Realm for Basic Authentication\n") \
         USE_FEATURE_HTTPD_AUTH_MD5("\t-m PASS\t\tCrypt PASS with md5 algorithm\n") \
diff --git a/networking/Config.in b/networking/Config.in
index 3dfd80b3d..34847a14b 100644
--- a/networking/Config.in
+++ b/networking/Config.in
@@ -69,14 +69,6 @@ config HTTPD
         help
           Serve web pages via an HTTP server.
 
-config FEATURE_HTTPD_WITHOUT_INETD
-        bool "Support using httpd as a daemon (not from inetd)"
-        default n
-        depends on HTTPD
-        help
-          This option enables uid and port options for the httpd applet,
-          and eliminates the need to be called from the inetd server daemon.
-
 config FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
         bool "Support reloading the global config file using hup signal"
         default n
diff --git a/networking/httpd.c b/networking/httpd.c
index 737b030a7..e125095f1 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -160,15 +160,8 @@ typedef struct {
         Htaccess *mime_a;             /* config mime types */
 #endif
 
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
         int server_socket;
         int accepted_socket;
-# define a_c_r config->accepted_socket
-# define a_c_w config->accepted_socket
-#else
-# define a_c_r 0
-# define a_c_w 1
-#endif
         volatile int alarm_signaled;
 
 #if ENABLE_FEATURE_HTTPD_CONFIG_WITH_SCRIPT_INTERPR
@@ -791,7 +784,6 @@ static void decodeBase64(char *Data)
 #endif
 
 
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
 /****************************************************************************
  *
  > $Function: openServer()
@@ -828,7 +820,6 @@ static int openServer(void)
         signal(SIGCHLD, SIG_IGN);   /* prevent zombie (defunct) processes */
         return fd;
 }
-#endif  /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
 
 /****************************************************************************
  *
@@ -905,7 +896,7 @@ static int sendHeaders(HttpResponseNum responseNum)
 #if DEBUG
         fprintf(stderr, "Headers: '%s'", buf);
 #endif
-        return full_write(a_c_w, buf, len);
+        return full_write(config->accepted_socket, buf, len);
 }
 
 /****************************************************************************
@@ -924,7 +915,7 @@ static int getLine(void)
         int count = 0;
         char *buf = config->buf;
 
-        while (read(a_c_r, buf + count, 1) == 1) {
+        while (read(config->accepted_socket, buf + count, 1) == 1) {
                 if (buf[count] == '\r') continue;
                 if (buf[count] == '\n') {
                         buf[count] = 0;
@@ -1106,9 +1097,8 @@ static int sendCgi(const char *url,
                                         }
                                 }
                         }
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
-                        config->accepted_socket = 1;      /* send to stdout */
-#endif
+                        /* send to stdout (even if we are not from inetd) */
+                        config->accepted_socket = 1;
                         sendHeaders(HTTP_NOT_FOUND);
                         _exit(242);
                 } /* end child */
@@ -1140,9 +1130,9 @@ static int sendCgi(const char *url,
                                 FD_SET(outFd, &writeSet);
                                 nfound = outFd > inFd ? outFd : inFd;
                                 if (post_readed_size == 0) {
-                                        FD_SET(a_c_r, &readSet);
-                                        if (nfound < a_c_r)
-                                                nfound = a_c_r;
+                                        FD_SET(config->accepted_socket, &readSet);
+                                        if (nfound < config->accepted_socket)
+                                                nfound = config->accepted_socket;
                                 }
                                 /* Now wait on the set of sockets! */
                                 nfound = select(nfound + 1, &readSet, &writeSet, 0, NULL);
@@ -1175,9 +1165,9 @@ static int sendCgi(const char *url,
                                 } else {
                                         post_readed_size = post_readed_idx = bodyLen = 0; /* broken pipe to CGI */
                                 }
-                        } else if (bodyLen > 0 && post_readed_size == 0 && FD_ISSET(a_c_r, &readSet)) {
+                        } else if (bodyLen > 0 && post_readed_size == 0 && FD_ISSET(config->accepted_socket, &readSet)) {
                                 count = bodyLen > (int)sizeof(wbuf) ? (int)sizeof(wbuf) : bodyLen;
-                                count = safe_read(a_c_r, wbuf, count);
+                                count = safe_read(config->accepted_socket, wbuf, count);
                                 if (count > 0) {
                                         post_readed_size += count;
                                         bodyLen -= count;
@@ -1186,7 +1176,7 @@ static int sendCgi(const char *url,
                                 }
                         }
                         if (FD_ISSET(inFd, &readSet)) {
-                                int s = a_c_w;
+                                int s = config->accepted_socket;
                                 char *rbuf = config->buf;
 
 #ifndef PIPE_BUF
@@ -1282,7 +1272,7 @@ static int sendFile(const char *url)
 
                 sendHeaders(HTTP_OK);
                 while ((count = full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
-                        if (full_write(a_c_w, buf, count) != count)
+                        if (full_write(config->accepted_socket, buf, count) != count)
                                 break;
                 }
                 close(f);
@@ -1670,18 +1660,13 @@ FORBIDDEN:      /* protect listing /cgi-bin */
                                         config->last_mod = sb.st_mtime;
                                 }
                                 sendFile(test);
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
-                                /* unset if non inetd looped */
                                 config->ContentLength = -1;
-#endif
 #if ENABLE_FEATURE_HTTPD_CGI
                         }
                 }
 #endif
         } while (0);
 
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
-/* from inetd don't looping: freeing, closing automatic from exit always */
 # if DEBUG
         fprintf(stderr, "closing socket\n");
 # endif
@@ -1689,27 +1674,25 @@ FORBIDDEN:      /* protect listing /cgi-bin */
         free(cookie);
         free(content_type);
         free(config->referer);
-#if ENABLE_FEATURE_HTTPD_BASIC_AUTH
+#  if ENABLE_FEATURE_HTTPD_BASIC_AUTH
         free(config->remoteuser);
-#endif
+#  endif
 # endif
-#endif  /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
-        shutdown(a_c_w, SHUT_WR);
+        shutdown(config->accepted_socket, SHUT_WR);
 
         /* Properly wait for remote to closed */
         FD_ZERO(&s_fd);
-        FD_SET(a_c_r, &s_fd);
+        FD_SET(config->accepted_socket, &s_fd);
 
         do {
                 tv.tv_sec = 2;
                 tv.tv_usec = 0;
-                retval = select(a_c_r + 1, &s_fd, NULL, NULL, &tv);
-        } while (retval > 0 && read(a_c_r, buf, sizeof(config->buf) > 0));
+                retval = select(config->accepted_socket + 1, &s_fd, NULL, NULL, &tv);
+        } while (retval > 0 && read(config->accepted_socket, buf, sizeof(config->buf) > 0));
 
-        shutdown(a_c_r, SHUT_RD);
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
+        shutdown(config->accepted_socket, SHUT_RD);
+        /* In inetd case, we close fd 1 (stdout) here. We will exit soon anyway */
         close(config->accepted_socket);
-#endif  /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
 }
 
 /****************************************************************************
@@ -1727,7 +1710,6 @@ FORBIDDEN:      /* protect listing /cgi-bin */
  * $Return: (int) . . . . Always 0.
  *
  ****************************************************************************/
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
 static int miniHttpd(int server)
 {
         fd_set readfd, portfd;
@@ -1789,10 +1771,8 @@ static int miniHttpd(int server)
         return 0;
 }
 
-#else
-        /* from inetd */
-
-static int miniHttpd(void)
+/* from inetd */
+static int miniHttpd_inetd(void)
 {
         struct sockaddr_in fromAddrLen;
         socklen_t sinlen = sizeof(struct sockaddr_in);
@@ -1810,7 +1790,6 @@ static int miniHttpd(void)
         handleIncoming();
         return 0;
 }
-#endif  /* CONFIG_FEATURE_HTTPD_WITHOUT_INETD */
 
 #if ENABLE_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
 static void sighup_handler(int sig)
@@ -1834,7 +1813,9 @@ enum {
         USE_FEATURE_HTTPD_BASIC_AUTH(    r_opt_realm     ,)
         USE_FEATURE_HTTPD_AUTH_MD5(      m_opt_md5       ,)
         USE_FEATURE_HTTPD_SETUID(        u_opt_setuid    ,)
-        USE_FEATURE_HTTPD_WITHOUT_INETD( p_opt_port      ,)
+        p_opt_port      ,
+        p_opt_inetd     ,
+        p_opt_foreground,
         OPT_CONFIG_FILE = 1 << c_opt_config_file,
         OPT_DECODE_URL  = 1 << d_opt_decode_url,
         OPT_HOME_HTTPD  = 1 << h_opt_home_httpd,
@@ -1842,7 +1823,9 @@ enum {
         OPT_REALM       = USE_FEATURE_HTTPD_BASIC_AUTH(    (1 << r_opt_realm     )) + 0,
         OPT_MD5         = USE_FEATURE_HTTPD_AUTH_MD5(      (1 << m_opt_md5       )) + 0,
         OPT_SETUID      = USE_FEATURE_HTTPD_SETUID(        (1 << u_opt_setuid    )) + 0,
-        OPT_PORT        = USE_FEATURE_HTTPD_WITHOUT_INETD( (1 << p_opt_port      )) + 0,
+        OPT_PORT        = 1 << p_opt_port,
+        OPT_INETD       = 1 << p_opt_inetd,
+        OPT_FOREGROUND  = 1 << p_opt_foreground,
 };
 
 static const char httpd_opts[] = "c:d:h:"
@@ -1850,7 +1833,7 @@ static const char httpd_opts[] = "c:d:h:"
         USE_FEATURE_HTTPD_BASIC_AUTH("r:")
         USE_FEATURE_HTTPD_AUTH_MD5("m:")
         USE_FEATURE_HTTPD_SETUID("u:")
-        USE_FEATURE_HTTPD_WITHOUT_INETD("p:");
+        "p:if";
 
 
 int httpd_main(int argc, char *argv[])
@@ -1859,22 +1842,16 @@ int httpd_main(int argc, char *argv[])
         const char *home_httpd = home;
         char *url_for_decode;
         USE_FEATURE_HTTPD_ENCODE_URL_STR(const char *url_for_encode;)
-        USE_FEATURE_HTTPD_WITHOUT_INETD(const char *s_port;)
-
+        const char *s_port;
         USE_FEATURE_HTTPD_SETUID(const char *s_ugid = NULL;)
         USE_FEATURE_HTTPD_SETUID(struct bb_uidgid_t ugid;)
-
         USE_FEATURE_HTTPD_AUTH_MD5(const char *pass;)
 
         config = xzalloc(sizeof(*config));
 #if ENABLE_FEATURE_HTTPD_BASIC_AUTH
         config->realm = "Web Server Authentication";
 #endif
-
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
         config->port = 80;
-#endif
-
         config->ContentLength = -1;
 
         opt = getopt32(argc, argv, httpd_opts,
@@ -1883,9 +1860,8 @@ int httpd_main(int argc, char *argv[])
                         USE_FEATURE_HTTPD_BASIC_AUTH(, &(config->realm))
                         USE_FEATURE_HTTPD_AUTH_MD5(, &pass)
                         USE_FEATURE_HTTPD_SETUID(, &s_ugid)
-                        USE_FEATURE_HTTPD_WITHOUT_INETD(, &s_port)
+                        , &s_port
                 );
-
         if (opt & OPT_DECODE_URL) {
                 printf("%s", decodeString(url_for_decode, 1));
                 return 0;
@@ -1902,9 +1878,9 @@ int httpd_main(int argc, char *argv[])
                 return 0;
         }
 #endif
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
         if (opt & OPT_PORT)
                 config->port = xatou16(s_port);
+
 #if ENABLE_FEATURE_HTTPD_SETUID
         if (opt & OPT_SETUID) {
                 char *e;
@@ -1923,24 +1899,22 @@ int httpd_main(int argc, char *argv[])
                 }
         }
 #endif
-#endif
 
         xchdir(home_httpd);
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
-        config->server_socket = openServer();
-# if ENABLE_FEATURE_HTTPD_SETUID
-        /* drop privileges */
-        if (opt & OPT_SETUID) {
-                if (ugid.gid != (gid_t)-1) {
-                        // FIXME: needed?
-                        //if (setgroups(1, &ugid.gid) == -1)
-                        //      bb_perror_msg_and_die("setgroups");
-                        xsetgid(ugid.gid);
+        if (!(opt & OPT_INETD)) {
+                config->server_socket = openServer();
+#if ENABLE_FEATURE_HTTPD_SETUID
+                /* drop privileges */
+                if (opt & OPT_SETUID) {
+                        if (ugid.gid != (gid_t)-1) {
+                                if (setgroups(1, &ugid.gid) == -1)
+                                        bb_perror_msg_and_die("setgroups");
+                                xsetgid(ugid.gid);
+                        }
+                        xsetuid(ugid.uid);
                 }
-                xsetuid(ugid.uid);
-        }
-# endif
 #endif
+        }
 
 #if ENABLE_FEATURE_HTTPD_CGI
         {
@@ -1950,10 +1924,9 @@ int httpd_main(int argc, char *argv[])
                 }
                 clearenv();
                 if (p)
-                        setenv("PATH", p, 1);
-# if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
-                setenv_long("SERVER_PORT", config->port);
-# endif
+                        setenv1("PATH", p);
+                if (!(opt & OPT_INETD))
+                        setenv_long("SERVER_PORT", config->port);
         }
 #endif
 
@@ -1963,12 +1936,10 @@ int httpd_main(int argc, char *argv[])
         parse_conf(default_path_httpd_conf, FIRST_PARSE);
 #endif
 
-#if ENABLE_FEATURE_HTTPD_WITHOUT_INETD
-# if !DEBUG
-        xdaemon(1, 0);     /* don't change current directory */
-# endif
+        if (opt & OPT_INETD)
+                return miniHttpd_inetd();
+
+        if (!(opt & OPT_FOREGROUND))
+                xdaemon(1, 0);     /* don't change current directory */
         return miniHttpd(config->server_socket);
-#else
-        return miniHttpd();
-#endif
 }