More fine tuning of the AppImage
authorArt Cancro <ajc@citadel.org>
Tue, 19 Jan 2021 05:48:29 +0000 (05:48 +0000)
committerArt Cancro <ajc@citadel.org>
Tue, 19 Jan 2021 05:48:29 +0000 (05:48 +0000)
appimage/build_appimage.sh
appimage/citadel.AppDir/AppRun
appimage/ctdlvisor.c

index 4391afc..f98e8ef 100755 (executable)
@@ -26,9 +26,6 @@ make || exit 1
 make install || exit 1
 popd
 
-# Build the appimage supervisor
-cc ctdlvisor.c -o ctdlvisor || exit 1
-
 # Clear out our build directories
 rm -frv citadel.AppDir/usr
 mkdir -p citadel.AppDir/usr/bin
@@ -51,6 +48,7 @@ do
        rsync -va /usr/local/$x/ ./citadel.AppDir/usr/local/$x/
 done
 
-cp ctdlvisor citadel.AppDir/usr/bin/
-ARCH=x86_64 appimagetool citadel.AppDir/
 rm -fr /usr/local/citadel /usr/local/webcit
+
+cc ctdlvisor.c -o citadel.AppDir/usr/bin/ctdlvisor || exit 1
+ARCH=ARM appimagetool citadel.AppDir/
index bb068bf..0c0ecec 100755 (executable)
@@ -2,4 +2,4 @@
 
 export LD_LIBRARY_PATH=$APPDIR/usr/lib
 export PATH=$APPDIR/usr/bin
-exec ctdlvisor
+exec ctdlvisor $*
index 5f088de..a3f52f5 100644 (file)
 #include <stdio.h>
 #include <sys/wait.h>
 #include <errno.h>
+#include <signal.h>
+#include <string.h>
+#include <limits.h>
 
+char *data_directory = "/usr/local/citadel";
+char *http_port = "80";
+char *https_port = "443";
 
 pid_t start_citadel() {
        char bin[1024];
        sprintf(bin, "%s/usr/local/citadel/citserver", getenv("APPDIR"));
        pid_t pid = fork();
        if (pid == 0) {
-               printf("Executing %s\n", bin);
-               execlp(bin, "citserver", "-x9", "-h/usr/local/citadel", NULL);
+               fprintf(stderr, "ctdlvisor: executing %s\n", bin);
+               execlp(bin, "citserver", "-x9", "-h", data_directory, NULL);
                perror("execlp");
                exit(errno);
        }
@@ -46,8 +52,8 @@ pid_t start_webcit() {
        sprintf(wchome, "-h%s/usr/local/webcit", getenv("APPDIR"));
        pid_t pid = fork();
        if (pid == 0) {
-               printf("Executing %s\n", bin);
-               execlp(bin, "webcit", "-x9", wchome, "-p80", "uds", "/usr/local/citadel", NULL);
+               fprintf(stderr, "ctdlvisor: executing %s\n", bin);
+               execlp(bin, "webcit", "-x9", wchome, "-p", http_port, "uds", data_directory, NULL);
                perror("execlp");
                exit(errno);
        }
@@ -64,8 +70,8 @@ pid_t start_webcits() {
        sprintf(wchome, "-h%s/usr/local/webcit", getenv("APPDIR"));
        pid_t pid = fork();
        if (pid == 0) {
-               printf("Executing %s\n", bin);
-               execlp(bin, "webcit", "-x9", wchome, "-s", "-p443", "uds", "/usr/local/citadel", NULL);
+               fprintf(stderr, "ctdlvisor: executing %s\n", bin);
+               execlp(bin, "webcit", "-x9", wchome, "-s", "-p", https_port, "uds", data_directory, NULL);
                perror("execlp");
                exit(errno);
        }
@@ -75,37 +81,74 @@ pid_t start_webcits() {
 }
 
 
-main() {
+int main(int argc, char **argv) {
+       pid_t citserver_pid;
+       pid_t webcit_pid;
+       pid_t webcits_pid;
+       int shutting_down = 0;
        int status;
        pid_t who_exited;
+       int c;
+
+       while ((c = getopt (argc, argv, "h:p:s:")) != -1)  switch(c) {
+               case 'h':
+                       data_directory = optarg;
+                       break;
+               case 'p':
+                       http_port = optarg;
+                       break;
+               case 's':
+                       https_port = optarg;
+                       break;
+               default:
+                       fprintf(stderr, "ctdlvisor: usage: ctdlvisor [-h data_directory] [-p http_port] [-s https_port]\n");
+                       exit(1);
+       }
 
-       pid_t citserver_pid = start_citadel();
-       pid_t webcit_pid = start_webcit();
-       pid_t webcits_pid = start_webcits();
+       fprintf(stderr, "ctdlvisor: Welcome to the Citadel System, brought to you using AppImage.\n");
+       fprintf(stderr, "ctdlvisor: LD_LIBRARY_PATH = %s\n", getenv("LD_LIBRARY_PATH"));
+       fprintf(stderr, "ctdlvisor:            PATH = %s\n", getenv("PATH"));
+       fprintf(stderr, "ctdlvisor:          APPDIR = %s\n", getenv("APPDIR"));
+       fprintf(stderr, "ctdlvisor:  data directory = %s\n", data_directory);
+       fprintf(stderr, "ctdlvisor:       HTTP port = %s\n", http_port);
+       fprintf(stderr, "ctdlvisor:      HTTPS port = %s\n", https_port);
 
-       do {
-               printf("LD_LIBRARY_PATH = %s\n", getenv("LD_LIBRARY_PATH"));
-               printf("PATH = %s\n", getenv("PATH"));
-               printf("APPDIR = %s\n", getenv("APPDIR"));
+       if (access(data_directory, R_OK|W_OK|X_OK)) {
+               fprintf(stderr, "ctdlvisor: %s: %s\n", data_directory, strerror(errno));
+               exit(errno);
+       }
 
-               printf("waiting...\n");
+       citserver_pid = start_citadel();
+       webcit_pid = start_webcit();
+       webcits_pid = start_webcits();
+
+       do {
+               fprintf(stderr, "ctdlvisor: waiting for any child process to exit...\n");
                who_exited = waitpid(-1, &status, 0);
-               printf("pid=%d exited, status=%d\n", who_exited, status);
+               fprintf(stderr, "ctdlvisor: pid=%d exited, status=%d, exitcode=%d\n", who_exited, status, WEXITSTATUS(status));
 
+               // A *deliberate* exit of citserver will cause ctdlvisor to shut the whole AppImage down.
+               // If it crashes, however, we will start it back up.
                if (who_exited == citserver_pid) {
                        if (WEXITSTATUS(status) == 0) {
-                               printf("ctdlvisor: citserver exited normally - ending AppImage session\n");
-                               exit(0);
+                               fprintf(stderr, "ctdlvisor: citserver exited normally - ending AppImage session\n");
+                               shutting_down = 1;
+                               kill(webcit_pid, SIGTERM);
+                               kill(webcits_pid, SIGTERM);
+                       }
+                       else {
+                               citserver_pid = start_citadel();
                        }
-                       citserver_pid = start_citadel();
                }
 
-               if (who_exited == webcit_pid)           webcit_pid = start_webcit();
-               if (who_exited == webcits_pid)          webcits_pid = start_webcits();
+               // WebCit processes are restarted if they exit for any reason.
+               if ((who_exited == webcit_pid) && (!shutting_down))             webcit_pid = start_webcit();
+               if ((who_exited == webcits_pid) && (!shutting_down))            webcits_pid = start_webcits();
 
-               sleep(1);                               // slow down any accidental loops
+               // If we somehow end up in an endless loop, at least slow it down.
+               sleep(1);
 
-       } while (who_exited >= 0);
+       } while ((who_exited >= 0) && (shutting_down == 0));
 
        printf("ctdlvisor: exiting.\n");
        exit(0);