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 <moira_site.h>
  28
  29 #define PROG    "moirad"
  30
  31 int rdpipe[2];
  32 extern char *sys_siglist[];
  33
  34 cleanup()
  35 {
  36         union wait stat;
  37         char buf[BUFSIZ];
  38         extern int errno;
  39         int serrno = errno;
  40
  41         buf[0]='\0';
  42
  43         while (wait3(&stat, WNOHANG, 0) > 0) {
  44                 if (WIFEXITED(stat)) {
  45                         if (stat.w_retcode)
  46                                 sprintf(buf,
  47                                         "exited with code %d\n",
  48                                         stat.w_retcode);
  49                 }
  50                 if (WIFSIGNALED(stat)) {
  51                         sprintf(buf, "exited on %s signal%s\n",
  52                                 sys_siglist[stat.w_termsig],
  53                                 (stat.w_coredump?"; Core dumped":0));
  54                 }
  55                 write(rdpipe[1], buf, strlen(buf));
  56                 close(rdpipe[1]);
  57         }
  58         errno = serrno;
  59 }
  60
  61 main(argc, argv)
  62 {
  63         char buf[BUFSIZ];
  64         FILE *log, *prog;
  65         int logf, inf, i, done, pid, tty;
  66
  67         extern int errno;
  68         extern char *sys_errlist[];
  69
  70         int nfds = getdtablesize();
  71
  72         setreuid(0);
  73         signal(SIGCHLD, cleanup);
  74
  75         sprintf(buf, "%s/moira.log", SMS_DIR);
  76         logf = open(buf, O_CREAT|O_WRONLY|O_APPEND, 0640);
  77         if (logf<0) {
  78                 perror(buf);
  79                 exit(1);
  80         }
  81         inf = open("/dev/null", O_RDONLY , 0);
  82         if (inf < 0) {
  83                 perror("/dev/null");
  84                 exit(1);
  85         }
  86         pipe(rdpipe);
  87         if (fork()) {
  88                 exit(0);
  89         }
  90         chdir("/");
  91         close(0);
  92         close(1);
  93         close(2);
  94         dup2(inf, 0);
  95         dup2(inf, 1);
  96         dup2(inf, 2);
  97
  98         tty = open("/dev/tty");
  99         ioctl(tty, TIOCNOTTY, 0);
 100         close(tty);
 101         sprintf(buf, "%s/%s", BIN_DIR, PROG);
 102
 103         if ((pid = fork()) == 0) {
 104
 105                 dup2(inf, 0);
 106                 dup2(rdpipe[1], 1);
 107                 dup2(1,2);
 108                 for (i = 3; i <nfds; i++) close(i);
 109                 execl(buf, PROG, 0);
 110                 perror("cannot run moirad");
 111                 exit(1);
 112         }
 113         if (pid<0) {
 114                 perror("moira_starter");
 115                 exit(1);
 116         }
 117
 118         log = fdopen(logf, "w");
 119         prog = fdopen(rdpipe[0], "r");
 120
 121
 122         do {
 123                 char *time_s;
 124                 extern char *ctime();
 125                 long foo;
 126
 127                 done = 0;
 128                 errno = 0;
 129                 if (fgets(buf, BUFSIZ, prog) == NULL) {
 130                         if (errno) {
 131                                 strcpy(buf, "Unable to read from program: ");
 132                                 strcat(buf, sys_errlist[errno]);
 133                                 strcat(buf, "\n");
 134                         } else break;
 135                 }
 136                 time(&foo);
 137                 time_s = ctime(&foo)+4;
 138                 time_s[strlen(time_s)-6]='\0';
 139                 fprintf(log, "%s %s", time_s, buf);
 140                 fflush(log);
 141         } while (!done);
 142         exit(0);
 143 }
 144
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