minix/commands/reboot/log.c
2009-11-09 10:26:00 +00:00

81 lines
1.9 KiB
C

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