avserver: remove daemon mode

This code spews a multitude of warnings with glibc (unchecked
return values), some of them possibly warranted.  Furthermore,
the deamonisation is not suitable for use with typical startup
scripts as it does not provide the PID of the daemon in any way.
Users wishing to run avserver as a daemon can still do so using
start-stop-daemon or equivalent tools.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Janne Grunau <janne-libav@jannau.net>

Changelog

@@ -9,6 +9,7 @@ version <next>:
 version 9_beta2:
 - metadata (INFO tag) support in WAV muxer
 - support for building DLLs using MSVC
+- remove avserver daemon mode
 
 
 version 9_beta1:

avserver.c

@@ -301,12 +301,10 @@ static int rtp_new_av_stream(HTTPContext *c,
                              HTTPContext *rtsp_c);
 
 static const char *my_program_name;
-static const char *my_program_dir;
 
 static const char *config_filename = "/etc/avserver.conf";
 
 static int avserver_debug;
-static int avserver_daemon;
 static int no_launch;
 static int need_to_start_children;
 
@@ -524,9 +522,6 @@ static void start_children(FFStream *feed)
                     }
                 }
 
-                /* This is needed to make relative pathnames work */
-                chdir(my_program_dir);
-
                 signal(SIGPIPE, SIG_DFL);
 
                 execvp(pathname, feed->child_argv);
@@ -4081,8 +4076,6 @@ static int parse_ffconfig(const char *filename)
             if (resolve_host(&my_http_addr.sin_addr, arg) != 0) {
                 ERROR("%s:%d: Invalid host/IP address: %s\n", arg);
             }
-        } else if (!av_strcasecmp(cmd, "NoDaemon")) {
-            avserver_daemon = 0;
         } else if (!av_strcasecmp(cmd, "RTSPPort")) {
             get_arg(arg, sizeof(arg), &p);
             val = atoi(arg);
@@ -4655,7 +4648,6 @@ static void handle_child_exit(int sig)
 static void opt_debug(void)
 {
     avserver_debug = 1;
-    avserver_daemon = 0;
     logfilename[0] = '-';
 }
 
@@ -4686,8 +4678,6 @@ int main(int argc, char **argv)
     show_banner();
 
     my_program_name = argv[0];
-    my_program_dir = getcwd(0, 0);
-    avserver_daemon = 1;
 
     parse_options(NULL, argc, argv, options, NULL);
 
@@ -4719,37 +4709,9 @@ int main(int argc, char **argv)
 
     compute_bandwidth();
 
-    /* put the process in background and detach it from its TTY */
-    if (avserver_daemon) {
-        int pid;
-
-        pid = fork();
-        if (pid < 0) {
-            perror("fork");
-            exit(1);
-        } else if (pid > 0) {
-            /* parent : exit */
-            exit(0);
-        } else {
-            /* child */
-            setsid();
-            close(0);
-            open("/dev/null", O_RDWR);
-            if (strcmp(logfilename, "-") != 0) {
-                close(1);
-                dup(0);
-            }
-            close(2);
-            dup(0);
-        }
-    }
-
     /* signal init */
     signal(SIGPIPE, SIG_IGN);
 
-    if (avserver_daemon)
-        chdir("/");
-
     if (http_server() < 0) {
         http_log("Could not start server\n");
         exit(1);

doc/avserver.conf

@@ -25,9 +25,6 @@ MaxBandwidth 1000
 # '-' is the standard output.
 CustomLog -
 
-# Suppress that if you want to launch avserver as a daemon.
-NoDaemon
-
 
 ##################################################################
 # Definition of the live feeds. Each live feed contains one video

doc/avserver.texi

@@ -31,11 +31,6 @@ several live feeds, streaming from files and time shifting on live feeds
 (you can seek to positions in the past on each live feed, provided you
 specify a big enough feed storage in avserver.conf).
 
-avserver runs in daemon mode by default; that is, it puts itself in
-the background and detaches from its TTY, unless it is launched in
-debug mode or a NoDaemon option is specified in the configuration
-file.
-
 This documentation covers only the streaming aspects of avserver /
 avconv. All questions about parameters for avconv, codec questions,
 etc. are not covered here. Read @file{avconv.html} for more
@@ -257,8 +252,7 @@ within the various <Stream> sections. Since avserver will not launch
 any avconv instances, you will have to launch them manually.
 @item -d
 Enable debug mode. This option increases log verbosity, directs log
-messages to stdout and causes avserver to run in the foreground
-rather than as a daemon.
+messages to stdout.
 @end table
 @c man end