| 1 | /*
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| 2 | log - log the shutdown's and the halt's
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| 3 |
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| 4 | Author: Edvard Tuinder <v892231@si.hhs.NL>
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| 5 |
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| 6 | shutdown is logged in /usr/adm/wtmp and in /usr/adm/log (if desired)
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| 7 | halt is logged only in /usr/adm/wtmp as `halt' to prevent last from
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| 8 | reporting halt's as crashes.
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| 9 |
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| 10 | */
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| 11 |
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| 12 | #define _POSIX_SOURCE 1
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| 13 | #include <sys/types.h>
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| 14 | #include <stdio.h>
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| 15 | #include <utmp.h>
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| 16 | #include <pwd.h>
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| 17 | #include <fcntl.h>
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| 18 | #include <time.h>
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| 19 | #include <string.h>
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| 20 | #include <unistd.h>
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| 21 | #include <sys/utsname.h>
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| 22 | #undef WTMP
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| 23 |
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| 24 | static char WTMP[] = "/usr/adm/wtmp"; /* Record of logins and logouts. */
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| 25 | static char SHUT_LOG[] = "/usr/adm/log";
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| 26 |
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| 27 | char who[8];
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| 28 | extern char *prog;
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| 29 | static char *month[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
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| 30 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
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| 31 |
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| 32 | void write_log _ARGS(( void ));
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| 33 |
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| 34 | void write_log()
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| 35 | {
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| 36 | int fd;
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| 37 | static struct utmp wtmp;
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| 38 | static struct passwd *pwd;
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| 39 | char mes[90];
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| 40 | struct tm *tm;
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| 41 | time_t now;
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| 42 | struct utsname utsname;
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| 43 | char *host = "localhost";
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| 44 |
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| 45 | time(&now);
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| 46 | tm = localtime(&now);
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| 47 |
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| 48 | if (uname(&utsname) >= 0) host = utsname.nodename;
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| 49 |
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| 50 | pwd = getpwuid(getuid());
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| 51 | if (pwd == (struct passwd *)0)
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| 52 | strcpy (who,"root");
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| 53 | else
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| 54 | strcpy (who,pwd->pw_name);
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| 55 | fd = open(WTMP,O_APPEND|O_WRONLY,1);
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| 56 | if (fd) {
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| 57 | if (strcmp(prog,"reboot"))
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| 58 | strcpy (wtmp.ut_user, prog);
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| 59 | else
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| 60 | strcpy (wtmp.ut_user, "shutdown"); /* last ... */
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| 61 | strcpy (wtmp.ut_id, "~~");
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| 62 | strcpy (wtmp.ut_line, "~");
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| 63 | wtmp.ut_pid = 0;
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| 64 | wtmp.ut_type = BOOT_TIME;
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| 65 | wtmp.ut_time = now;
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| 66 | wtmp.ut_host[0]= '\0';
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| 67 | write (fd, (char *) &wtmp,sizeof(struct utmp));
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| 68 | close(fd);
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| 69 | }
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| 70 | fd = open(SHUT_LOG,O_APPEND|O_WRONLY,1);
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| 71 | if (!fd)
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| 72 | perror ("open");
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| 73 | else {
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| 74 | sprintf (mes,"%s %02d %02d:%02d:%02d %s: system %s by %s@%s\n",
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| 75 | month[tm->tm_mon],tm->tm_mday,tm->tm_hour,tm->tm_min,tm->tm_sec,
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| 76 | prog,prog,who,host);
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| 77 | write (fd,mes,strlen(mes));
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| 78 | close(fd);
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| 79 | }
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| 80 | return;
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| 81 | }
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