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#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <utmp.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "lib.h"
#define S(a,b) str_copy(a,b)
#define SN(a,b,c) str_copynz(a,b,c)
#define N(a,b,c,d) fmt_nmb_(a,b,c,d)
int main(int argc, char **argv) {
struct utmp ut;
struct tm *tm;
struct in_addr in;
time_t tmp_time;
char buf[1024];
char *addr,*p;
int fd=0;
if (argc>1) {
fd = open(argv[1], O_RDONLY);
if (fd == -1) { write(1,buf,S(buf,"error open()\n")); _exit(1); }
}
write(1,buf,S(buf,"type pid id user line host ip date "
"[term exit]\n"));
while(utmp_io(fd, &ut, F_RDLCK)) {
tmp_time = ut.ut_tv.tv_sec;
tmp_time += get_tz(tmp_time);
tm=nv_gmtime(&tmp_time);
in.s_addr = ut.ut_addr;
addr = inet_ntoa(in);
p = buf;
*p++ = '[';
p += N(p, ut.ut_type, 1,0); p +=S(p,"] [");
p += N(p, ut.ut_pid, 5,0); p +=S(p,"] [");
p += fmt_str_(p,ut.ut_id,4); p +=S(p,"] [");
p += SN(p, ut.ut_user,UT_NAMESIZE); p +=S(p,"] [");
p += SN(p, ut.ut_line,UT_LINESIZE); p +=S(p,"] [");
p += SN(p, ut.ut_host,UT_HOSTSIZE); p +=S(p,"] [");
p += SN(p, addr,20); p +=S(p,"] [");
p += fmt_ulong(p, (1900 +tm->tm_year) % 100); *p++ = '-';
p += N(p, 1+tm->tm_mon,2,1); *p++ = '-';
p += N(p, tm->tm_mday, 2,1); *p++ = ' ';
p += N(p, tm->tm_hour, 2,1); *p++ = ':';
p += N(p, tm->tm_min, 2,1); *p++ = ':';
p += N(p, tm->tm_sec, 2,1);
if (argc>2) {
p +=S(p,"] [");
p += fmt_ulong(p,ut.ut_exit.e_termination); *p++ = ' ';
p += fmt_ulong(p,ut.ut_exit.e_exit);
}
p +=S(p,"]\n");
write(1,buf, p-buf);
}
close(fd);
return 0;
}
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