Commit | Line | Data |
---|---|---|
31cef89c | 1 | static char *sccsid = "@(#)last.c 4.2 (Berkeley) 10/9/80"; |
c9af8668 BJ |
2 | /* |
3 | * last | |
4 | */ | |
5 | #include <sys/types.h> | |
6 | #include <stdio.h> | |
7 | #include <signal.h> | |
8 | #include <stat.h> | |
9 | #include <utmp.h> | |
10 | ||
11 | #define NMAX sizeof(buf[0].ut_name) | |
12 | #define LMAX sizeof(buf[0].ut_line) | |
13 | #define SECDAY (24*60*60) | |
14 | ||
15 | #define lineq(a,b) (!strncmp(a,b,LMAX)) | |
16 | #define nameq(a,b) (!strncmp(a,b,NMAX)) | |
17 | ||
18 | #define MAXTTYS 256 | |
19 | ||
20 | char **argv; | |
21 | int argc; | |
22 | ||
23 | struct utmp buf[128]; | |
24 | char ttnames[MAXTTYS][LMAX+1]; | |
25 | long logouts[MAXTTYS]; | |
26 | ||
27 | char *ctime(), *strspl(); | |
28 | int onintr(); | |
29 | ||
30 | main(ac, av) | |
31 | char **av; | |
32 | { | |
33 | register int i, k; | |
34 | int bl, wtmp; | |
35 | char *ct; | |
36 | register struct utmp *bp; | |
37 | long otime; | |
38 | struct stat stb; | |
39 | int print; | |
40 | ||
41 | time(&buf[0].ut_time); | |
42 | ac--, av++; | |
43 | argc = ac; | |
44 | argv = av; | |
45 | for (i = 0; i < argc; i++) { | |
46 | if (strlen(argv[i])>2) | |
47 | continue; | |
48 | if (!strcmp(argv[i], "~")) | |
49 | continue; | |
50 | if (getpwnam(argv[i])) | |
51 | continue; | |
52 | argv[i] = strspl("tty", argv[i]); | |
53 | } | |
54 | wtmp = open("/usr/adm/wtmp", 0); | |
55 | if (wtmp < 0) { | |
56 | perror("/usr/adm/wtmp"); | |
57 | exit(1); | |
58 | } | |
59 | fstat(wtmp, &stb); | |
60 | bl = (stb.st_size + sizeof (buf)-1) / sizeof (buf); | |
61 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) { | |
62 | signal(SIGINT, onintr); | |
63 | signal(SIGQUIT, onintr); | |
64 | } | |
65 | for (bl--; bl >= 0; bl--) { | |
66 | lseek(wtmp, bl * sizeof (buf), 0); | |
67 | bp = &buf[read(wtmp, buf, sizeof (buf)) / sizeof(buf[0]) - 1]; | |
68 | for ( ; bp >= buf; bp--) { | |
69 | print = want(bp); | |
70 | if (print) { | |
71 | ct = ctime(&bp->ut_time); | |
72 | printf("%-*.*s %-*.*s %10.10s %5.5s ", | |
73 | NMAX, NMAX, bp->ut_name, | |
74 | LMAX, LMAX, bp->ut_line, ct, 11+ct); | |
75 | } | |
76 | for (i = 0; i < MAXTTYS; i++) { | |
77 | if (ttnames[i][0] == 0) { | |
78 | strncpy(ttnames[i], bp->ut_line, | |
79 | sizeof(bp->ut_line)); | |
cf779ba2 | 80 | otime = logouts[i]; |
c9af8668 BJ |
81 | logouts[i] = bp->ut_time; |
82 | break; | |
83 | } | |
84 | if (lineq(ttnames[i], bp->ut_line)) { | |
85 | otime = logouts[i]; | |
86 | logouts[i] = bp->ut_time; | |
87 | break; | |
88 | } | |
89 | } | |
90 | if (print) { | |
91 | if (otime == 0) | |
92 | printf(" still logged in\n"); | |
93 | else { | |
94 | long delta; | |
95 | if (otime < 0) { | |
96 | otime = -otime; | |
97 | printf("- crash"); | |
98 | } else | |
99 | printf("- %5.5s", | |
100 | ctime(&otime)+11); | |
101 | delta = otime - bp->ut_time; | |
102 | if (delta < SECDAY) | |
103 | printf(" (%5.5s)\n", | |
104 | asctime(gmtime(&delta))+11); | |
105 | else | |
106 | printf(" (%ld+%5.5s)\n", | |
107 | delta / SECDAY, | |
108 | asctime(gmtime(&delta))+11); | |
109 | } | |
110 | fflush(stdout); | |
111 | } | |
cf779ba2 BJ |
112 | if (!strcmp(bp->ut_name, "reboot")) |
113 | for (i = 0; i < MAXTTYS; i++) | |
c9af8668 BJ |
114 | logouts[i] = -bp->ut_time; |
115 | } | |
116 | } | |
117 | ct = ctime(&buf[0].ut_time); | |
118 | printf("\nwtmp begins %10.10s %5.5s \n", ct, ct + 11); | |
119 | exit(0); | |
120 | } | |
121 | ||
122 | onintr(signo) | |
123 | int signo; | |
124 | { | |
125 | char *ct; | |
126 | ||
127 | if (signo == SIGQUIT) | |
128 | signal(SIGQUIT, onintr); | |
129 | ct = ctime(&buf[0].ut_time); | |
130 | printf("\ninterrupted %10.10s %5.5s \n", ct, ct + 11); | |
131 | if (signo == SIGINT) | |
132 | exit(1); | |
133 | } | |
134 | ||
135 | want(bp) | |
136 | struct utmp *bp; | |
137 | { | |
138 | register char **av; | |
139 | register int ac; | |
140 | ||
141 | if (bp->ut_line[0] == '~') | |
142 | strcpy(bp->ut_name, "reboot"); /* bandaid */ | |
143 | if (bp->ut_name[0] == 0) | |
144 | return (0); | |
145 | if (argc == 0) | |
146 | return (1); | |
147 | av = argv; | |
148 | for (ac = 0; ac < argc; ac++) { | |
149 | if (nameq(*av, bp->ut_name) || lineq(*av, bp->ut_line)) | |
150 | return (1); | |
151 | av++; | |
152 | } | |
153 | return (0); | |
154 | } | |
155 | ||
156 | char * | |
157 | strspl(left, right) | |
158 | char *left, *right; | |
159 | { | |
160 | char *res = (char *)malloc(strlen(left)+strlen(right)+1); | |
161 | ||
162 | strcpy(res, left); | |
163 | strcat(res, right); | |
164 | return (res); | |
165 | } |