82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
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/*
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log - log the shutdown's and the halt's
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Author: Edvard Tuinder <v892231@si.hhs.NL>
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shutdown is logged in /usr/adm/wtmp and in /usr/adm/log (if desired)
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halt is logged only in /usr/adm/wtmp as `halt' to prevent last from
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reporting halt's as crashes.
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*/
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#define _POSIX_SOURCE 1
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#include <sys/types.h>
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#include <stdio.h>
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#include <utmp.h>
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#include <pwd.h>
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#include <fcntl.h>
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#include <time.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/utsname.h>
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#undef WTMP
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static char WTMP[] = "/usr/adm/wtmp"; /* Record of logins and logouts. */
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static char SHUT_LOG[] = "/usr/adm/log";
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char who[8];
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extern char *prog;
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static char *month[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
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void write_log _ARGS(( void ));
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void write_log()
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{
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int fd;
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static struct utmp wtmp;
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static struct passwd *pwd;
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char mes[90];
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struct tm *tm;
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time_t now;
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struct utsname utsname;
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char *host = "localhost";
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time(&now);
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tm = localtime(&now);
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if (uname(&utsname) >= 0) host = utsname.nodename;
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pwd = getpwuid(getuid());
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if (pwd == (struct passwd *)0)
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strcpy (who,"root");
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else
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strcpy (who,pwd->pw_name);
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fd = open(WTMP,O_APPEND|O_WRONLY,1);
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if (fd) {
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if (strcmp(prog,"reboot"))
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strcpy (wtmp.ut_user, prog);
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else
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strcpy (wtmp.ut_user, "shutdown"); /* last ... */
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strcpy (wtmp.ut_id, "~~");
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strcpy (wtmp.ut_line, "~");
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wtmp.ut_pid = 0;
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wtmp.ut_type = BOOT_TIME;
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wtmp.ut_time = now;
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wtmp.ut_host[0]= '\0';
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write (fd, (char *) &wtmp,sizeof(struct utmp));
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close(fd);
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}
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fd = open(SHUT_LOG,O_APPEND|O_WRONLY,1);
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if (!fd)
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perror ("open");
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else {
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sprintf (mes,"%s %02d %02d:%02d:%02d %s: system %s by %s@%s\n",
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month[tm->tm_mon],tm->tm_mday,tm->tm_hour,tm->tm_min,tm->tm_sec,
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prog,prog,who,host);
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write (fd,mes,strlen(mes));
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close(fd);
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}
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return;
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}
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