X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=appimage%2Fctdlvisor.c;h=041d1a52c552c16cda1a97866134d1b5d431a5aa;hb=HEAD;hp=3c7be88cc514159689e7012f2e8cccf4d2f65470;hpb=8779ae0fd227b721c5244857956f578fc4af2149;p=citadel.git diff --git a/appimage/ctdlvisor.c b/appimage/ctdlvisor.c deleted file mode 100644 index 3c7be88cc..000000000 --- a/appimage/ctdlvisor.c +++ /dev/null @@ -1,259 +0,0 @@ -// This is a supervisor program that handles start/stop/restart of -// the various Citadel System components, when we are running on -// an AppImage instance. -// -// Copyright (c) 2021 by the citadel.org team -// -// This program is open source software. Use, duplication, or disclosure -// is subject to the terms of the GNU General Public License, version 3. -// The program is distributed without any warranty, expressed or implied. - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -pid_t citserver_pid; -pid_t webcit_pid; -pid_t webcits_pid; -int shutting_down = 0; - -// Call this instead of exit() just for common diagnostics etc. -void ctdlvisor_exit(int code) { - printf("ctdlvisor: exit code %d\n", code); - exit(code); -} - - -// Interrupting this program with a signal will begin an orderly shutdown. -void signal_handler(int signal) { - fprintf(stderr, "ctdlvisor: caught signal %d\n", signal); - - while(shutting_down) { - fprintf(stderr, "ctdlvisor: already shutting down\n"); - sleep(1); - } - - int status; - pid_t who_exited; - char *what_exited = NULL; - - shutting_down = 1; - kill(citserver_pid, SIGTERM); - kill(webcit_pid, SIGTERM); - kill(webcits_pid, SIGTERM); - do { - fprintf(stderr, "ctdlvisor: waiting for all child process to exit...\n"); - who_exited = waitpid(-1, &status, 0); - if (who_exited == citserver_pid) { - what_exited = "Citadel Server"; - } - else if (who_exited == webcit_pid) { - what_exited = "WebCit HTTP"; - } - else if (who_exited == webcits_pid) { - what_exited = "WebCit HTTPS"; - } - else { - what_exited = "unknown"; - } - if (who_exited >= 0) { - fprintf(stderr, "ctdlvisor: %d (%s) ended, status=%d\n", who_exited, what_exited, status); - } - } while (who_exited >= 0); - ctdlvisor_exit(0); -} - - -void detach_from_tty(void) { - signal(SIGHUP, SIG_IGN); - signal(SIGINT, SIG_IGN); - signal(SIGQUIT, SIG_IGN); - - setsid(); // become our own process group leader - umask(0); - if ( (freopen("/dev/null", "r", stdin) != stdin) || - (freopen("/dev/null", "w", stdout) != stdout) || - (freopen("/dev/null", "w", stderr) != stderr) - ) { - fprintf(stderr, "sysdep: unable to reopen stdio: %s\n", strerror(errno)); - } -} - - -pid_t start_citadel() { - char bin[1024]; - sprintf(bin, "%s/usr/local/citadel/citserver", getenv("APPDIR")); - pid_t pid = fork(); - if (pid == 0) { - fprintf(stderr, "ctdlvisor: executing %s with data directory %s\n", bin, getenv("CTDL_DIR")); - detach_from_tty(); - execlp(bin, "citserver", "-x9", "-h", getenv("CTDL_DIR"), NULL); - exit(errno); - } - else { - fprintf(stderr, "ctdlvisor: citserver running on pid=%d\n", pid); - return(pid); - } -} - - -pid_t start_webcit() { - char bin[1024]; - sprintf(bin, "%s/usr/local/webcit/webcit", getenv("APPDIR")); - char wchome[1024]; - sprintf(wchome, "-h%s/usr/local/webcit", getenv("APPDIR")); - pid_t pid = fork(); - if (pid == 0) { - fprintf(stderr, "ctdlvisor: executing %s\n", bin); - detach_from_tty(); - execlp(bin, "webcit", "-x9", wchome, "-p", getenv("HTTP_PORT"), "uds", getenv("CTDL_DIR"), NULL); - exit(errno); - } - else { - fprintf(stderr, "ctdlvisor: webcit (HTTP) running on pid=%d\n", pid); - return(pid); - } -} - - -pid_t start_webcits() { - char bin[1024]; - sprintf(bin, "%s/usr/local/webcit/webcit", getenv("APPDIR")); - char wchome[1024]; - sprintf(wchome, "-h%s/usr/local/webcit", getenv("APPDIR")); - pid_t pid = fork(); - if (pid == 0) { - fprintf(stderr, "ctdlvisor: executing %s\n", bin); - detach_from_tty(); - execlp(bin, "webcit", "-x9", wchome, "-s", "-p", getenv("HTTPS_PORT"), "uds", getenv("CTDL_DIR"), NULL); - exit(errno); - } - else { - fprintf(stderr, "ctdlvisor: webcit (HTTPS) running on pid=%d\n", pid); - return(pid); - } -} - - -void main_loop(void) { - int status; - pid_t who_exited; - int citserver_exit_code = 0; - - do { - who_exited = waitpid(-1, &status, 0); - 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) { - citserver_exit_code = WEXITSTATUS(status); - if ((WIFEXITED(status)) && (citserver_exit_code == 0)) { - fprintf(stderr, "ctdlvisor: citserver exited normally - ending AppImage session\n"); - shutting_down = 1; - kill(webcit_pid, SIGTERM); - kill(webcits_pid, SIGTERM); - } - else if ((WIFEXITED(status)) && (citserver_exit_code >= 101) && (citserver_exit_code <= 109)) { - fprintf(stderr, "ctdlvisor: citserver exited intentionally - ending AppImage session\n"); - shutting_down = 1; - kill(webcit_pid, SIGTERM); - kill(webcits_pid, SIGTERM); - } - else { - if (WIFSIGNALED(status)) { - fprintf(stderr, "ctdlvisor: citserver crashed on signal %d\n", WTERMSIG(status)); - } - citserver_pid = start_citadel(); - } - } - - // 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(); - - // If we somehow end up in an endless loop, at least slow it down. - sleep(1); - - } while (who_exited >= 0); - ctdlvisor_exit(citserver_exit_code); -} - - -int main(int argc, char **argv) { - int a; - int migrate_mode = 0; - - if (getenv("APPDIR") == NULL) { - fprintf(stderr, "ctdlvisor: APPDIR is not set. This program must be run from within an AppImage.\n"); - ctdlvisor_exit(1); - } - - /* parse command-line arguments */ - while ((a=getopt(argc, argv, "cm")) != EOF) switch(a) { - - // test this binary for compatibility and exit - case 'c': - fprintf(stderr, "%s: binary compatibility confirmed\n", argv[0]); - exit(0); - break; - - // run ctdlmigrate only - case 'm': - migrate_mode = 1; - break; - - // any other parameter makes it crash and burn - default: - fprintf(stderr, "usage\n"); - exit(1); - } - - 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", getenv("CTDL_DIR")); - fprintf(stderr, "ctdlvisor: HTTP port = %s\n", getenv("HTTP_PORT")); - fprintf(stderr, "ctdlvisor: HTTPS port = %s\n", getenv("HTTPS_PORT")); - - if (access(getenv("CTDL_DIR"), R_OK|W_OK|X_OK)) { - fprintf(stderr, "ctdlvisor: %s: %s\n", getenv("CTDL_DIR"), strerror(errno)); - ctdlvisor_exit(errno); - } - - signal(SIGHUP, signal_handler); - - // "migrate mode" means we just start the server and then run ctdlmigrate interactively. - if (migrate_mode) { - citserver_pid = start_citadel(); - fprintf(stderr, "ctdlvisor: waiting a moment for citserver to initialize...\n"); - sleep(5); - char bin[1024]; - sprintf(bin, "%s/usr/local/citadel/ctdlmigrate -h %s", getenv("APPDIR"), getenv("CTDL_DIR")); - system(bin); - kill(citserver_pid, SIGTERM); - } - - // Otherwise, it's just a normal happy day in Citadel land. - else { - signal(SIGTERM, signal_handler); - signal(SIGINT, signal_handler); - signal(SIGQUIT, signal_handler); - - citserver_pid = start_citadel(); - webcit_pid = start_webcit(); - webcits_pid = start_webcits(); - - main_loop(); - } - - ctdlvisor_exit(0); -}