server/startmoira.c

   1 /*
   2  *      $Source$
   3  *      $Author$
   4  *      $Header$
   5  *
   6  *      Copyright (C) 1987 by the Massachusetts Institute of Technology
   7  *      For copying and distribution information, please see the file
   8  *      <mit-copyright.h>.
   9  *
  10  *      This program starts the moira server in a "clean" environment.
  11  *      and then waits for it to exit.
  12  *
  13  */
  14
  15 #ifndef lint
  16 static char *rcsid_mr_starter_c = "$Header$";
  17 #endif lint
  18
  19 #include <mit-copyright.h>
  20 #include <stdio.h>
  21 #include <strings.h>
  22 #include <sys/types.h>
  23 #include <sys/file.h>
  24 #include <sys/wait.h>
  25 #include <sys/signal.h>
  26 #include <sys/ioctl.h>
  27 #include <fcntl.h>
  28 #include <sys/resource.h>
  29 #include <moira_site.h>
  30
  31
  32 #define PROG    "moirad"
  33
  34 int rdpipe[2];
  35 extern int errno;
  36 char *whoami;
  37
  38 cleanup()
  39 {
  40         int stat, serrno = errno;
  41         char buf[BUFSIZ];
  42
  43         buf[0]='\0';
  44
  45         while (waitpid(-1, &stat, WNOHANG) > 0) {
  46                 if (WIFEXITED(stat)) {
  47                         if (WEXITSTATUS(stat)) {
  48                                 sprintf(buf,
  49                                         "exited with code %d\n",
  50                                         WEXITSTATUS(stat));
  51                                 send_zgram("startmoira", buf);
  52                         }
  53                 }
  54                 if (WIFSIGNALED(stat)) {
  55                         sprintf(buf, "exited on signal %d%s\n",
  56                                 WTERMSIG(stat),
  57                                 (WCOREDUMP(stat)?"; Core dumped":0));
  58                         if(WCOREDUMP(stat)) send_zgram("startmoira", buf);
  59                 }
  60                 write(rdpipe[1], buf, strlen(buf));
  61                 close(rdpipe[1]);
  62         }
  63         errno = serrno;
  64 }
  65
  66 main(argc, argv)
  67      int argc;
  68      char *argv[];
  69 {
  70         char buf[BUFSIZ];
  71         FILE *log, *prog;
  72         int logf, inf, i, done, pid, tty;
  73         struct rlimit rl;
  74
  75         extern int errno;
  76         extern char *sys_errlist[];
  77
  78         struct sigaction action;
  79         int nfds;
  80
  81         whoami = argv[0];
  82
  83         getrlimit(RLIMIT_NOFILE, &rl);
  84         nfds = rl.rlim_cur;
  85
  86         action.sa_handler = cleanup;
  87         action.sa_flags = 0;
  88         sigemptyset(&action.sa_mask);
  89         sigaction(SIGCHLD, &action, NULL);
  90
  91         sprintf(buf, "%s/moira.log", SMS_DIR);
  92         logf = open(buf, O_CREAT|O_WRONLY|O_APPEND, 0640);
  93         if (logf<0) {
  94                 perror(buf);
  95                 exit(1);
  96         }
  97         inf = open("/dev/null", O_RDONLY , 0);
  98         if (inf < 0) {
  99                 perror("/dev/null");
 100                 exit(1);
 101         }
 102         pipe(rdpipe);
 103         if (fork()) {
 104                 exit(0);
 105         }
 106         chdir("/");
 107         close(0);
 108         close(1);
 109         close(2);
 110         dup2(inf, 0);
 111         dup2(inf, 1);
 112         dup2(inf, 2);
 113
 114         setpgrp();
 115         sprintf(buf, "%s/%s", BIN_DIR, PROG);
 116
 117         if ((pid = fork()) == 0) {
 118
 119                 dup2(inf, 0);
 120                 dup2(rdpipe[1], 1);
 121                 dup2(1,2);
 122                 for (i = 3; i <nfds; i++) close(i);
 123                 execl(buf, PROG, 0);
 124                 perror("cannot run moirad");
 125                 exit(1);
 126         }
 127         if (pid<0) {
 128                 perror("moira_starter");
 129                 exit(1);
 130         }
 131
 132         log = fdopen(logf, "w");
 133         prog = fdopen(rdpipe[0], "r");
 134
 135
 136         do {
 137                 char *time_s;
 138                 extern char *ctime();
 139                 long foo;
 140
 141                 done = 0;
 142                 errno = 0;
 143                 if (fgets(buf, BUFSIZ, prog) == NULL) {
 144                         if (errno && errno!=EINTR) {
 145                                 strcpy(buf, "Unable to read from program: ");
 146                                 strcat(buf, sys_errlist[errno]);
 147                                 strcat(buf, "\n");
 148                         } else break;
 149                 }
 150                 time(&foo);
 151                 time_s = ctime(&foo)+4;
 152                 time_s[strlen(time_s)-6]='\0';
 153                 fprintf(log, "%s %s", time_s, buf);
 154                 fflush(log);
 155         } while (!done);
 156         exit(0);
 157 }