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 <errno.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <sys/types.h>
  24 #include <sys/file.h>
  25 #include <sys/wait.h>
  26 #include <sys/signal.h>
  27 #include <sys/ioctl.h>
  28 #include <time.h>
  29 #include <fcntl.h>
  30 #include <sys/resource.h>
  31 #include <moira_site.h>
  32
  33
  34 #define PROG    "moirad"
  35
  36 int rdpipe[2];
  37 extern int errno;
  38 char *whoami;
  39
  40 void cleanup()
  41 {
  42         int stat, serrno = errno;
  43         char buf[BUFSIZ];
  44
  45         buf[0]='\0';
  46
  47         while (waitpid(-1, &stat, WNOHANG) > 0) {
  48                 if (WIFEXITED(stat)) {
  49                         if (WEXITSTATUS(stat)) {
  50                                 sprintf(buf,
  51                                         "exited with code %d\n",
  52                                         WEXITSTATUS(stat));
  53                                 send_zgram("startmoira", buf);
  54                         }
  55                 }
  56                 if (WIFSIGNALED(stat)) {
  57                         sprintf(buf, "exited on signal %d%s\n",
  58                                 WTERMSIG(stat),
  59                                 (WCOREDUMP(stat)?"; Core dumped":0));
  60                         if(WCOREDUMP(stat)) send_zgram("startmoira", buf);
  61                 }
  62                 write(rdpipe[1], buf, strlen(buf));
  63                 close(rdpipe[1]);
  64         }
  65         errno = serrno;
  66 }
  67
  68 main(argc, argv)
  69      int argc;
  70      char *argv[];
  71 {
  72         char buf[BUFSIZ];
  73         FILE *log, *prog;
  74         int logf, inf, i, done, pid, tty;
  75         struct rlimit rl;
  76
  77         extern int errno;
  78         extern char *sys_errlist[];
  79
  80         struct sigaction action;
  81         int nfds;
  82
  83         whoami = argv[0];
  84
  85         getrlimit(RLIMIT_NOFILE, &rl);
  86         nfds = rl.rlim_cur;
  87
  88         action.sa_handler = cleanup;
  89         action.sa_flags = 0;
  90         sigemptyset(&action.sa_mask);
  91         sigaction(SIGCHLD, &action, NULL);
  92
  93         sprintf(buf, "%s/moira.log", SMS_DIR);
  94         logf = open(buf, O_CREAT|O_WRONLY|O_APPEND, 0640);
  95         if (logf<0) {
  96                 perror(buf);
  97                 exit(1);
  98         }
  99         inf = open("/dev/null", O_RDONLY , 0);
 100         if (inf < 0) {
 101                 perror("/dev/null");
 102                 exit(1);
 103         }
 104         pipe(rdpipe);
 105         if (fork()) {
 106                 exit(0);
 107         }
 108         chdir("/");
 109         close(0);
 110         close(1);
 111         close(2);
 112         dup2(inf, 0);
 113         dup2(inf, 1);
 114         dup2(inf, 2);
 115
 116         setpgrp();
 117         sprintf(buf, "%s/%s", BIN_DIR, PROG);
 118
 119         if ((pid = fork()) == 0) {
 120
 121                 dup2(inf, 0);
 122                 dup2(rdpipe[1], 1);
 123                 dup2(1,2);
 124                 for (i = 3; i <nfds; i++) close(i);
 125                 execl(buf, PROG, 0);
 126                 perror("cannot run moirad");
 127                 exit(1);
 128         }
 129         if (pid<0) {
 130                 perror("moira_starter");
 131                 exit(1);
 132         }
 133
 134         log = fdopen(logf, "w");
 135         prog = fdopen(rdpipe[0], "r");
 136
 137
 138         do {
 139                 char *time_s;
 140                 long foo;
 141
 142                 done = 0;
 143                 errno = 0;
 144                 if (fgets(buf, BUFSIZ, prog) == NULL) {
 145                         if (errno && errno!=EINTR) {
 146                                 strcpy(buf, "Unable to read from program: ");
 147                                 strcat(buf, sys_errlist[errno]);
 148                                 strcat(buf, "\n");
 149                         } else break;
 150                 }
 151                 time(&foo);
 152                 time_s = ctime(&foo)+4;
 153                 time_s[strlen(time_s)-6]='\0';
 154                 fprintf(log, "%s %s", time_s, buf);
 155                 fflush(log);
 156         } while (!done);
 157         exit(0);
 158 }