Commit | Line | Data |
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37c640e2 | 1 | #ifndef lint |
ac7e4ccf | 2 | static char *sccsid = "@(#)last.c 4.7 (Berkeley) %G%"; |
37c640e2 SL |
3 | #endif |
4 | ||
c9af8668 BJ |
5 | /* |
6 | * last | |
7 | */ | |
8 | #include <sys/types.h> | |
9 | #include <stdio.h> | |
10 | #include <signal.h> | |
40d69e19 | 11 | #include <sys/stat.h> |
c9af8668 BJ |
12 | #include <utmp.h> |
13 | ||
14 | #define NMAX sizeof(buf[0].ut_name) | |
15 | #define LMAX sizeof(buf[0].ut_line) | |
37c640e2 | 16 | #define HMAX sizeof(buf[0].ut_host) |
c9af8668 BJ |
17 | #define SECDAY (24*60*60) |
18 | ||
19 | #define lineq(a,b) (!strncmp(a,b,LMAX)) | |
20 | #define nameq(a,b) (!strncmp(a,b,NMAX)) | |
37c640e2 | 21 | #define hosteq(a,b) (!strncmp(a,b,HMAX)) |
c9af8668 BJ |
22 | |
23 | #define MAXTTYS 256 | |
24 | ||
25 | char **argv; | |
26 | int argc; | |
b50e7db3 | 27 | int nameargs; |
c9af8668 BJ |
28 | |
29 | struct utmp buf[128]; | |
30 | char ttnames[MAXTTYS][LMAX+1]; | |
31 | long logouts[MAXTTYS]; | |
32 | ||
33 | char *ctime(), *strspl(); | |
34 | int onintr(); | |
35 | ||
36 | main(ac, av) | |
37 | char **av; | |
38 | { | |
39 | register int i, k; | |
40 | int bl, wtmp; | |
41 | char *ct; | |
42 | register struct utmp *bp; | |
43 | long otime; | |
44 | struct stat stb; | |
45 | int print; | |
fe6cb666 BJ |
46 | char * crmsg = (char *)0; |
47 | long crtime; | |
b50e7db3 DW |
48 | long outrec = 0; |
49 | long maxrec = 0x7fffffffL; | |
c9af8668 BJ |
50 | |
51 | time(&buf[0].ut_time); | |
52 | ac--, av++; | |
b50e7db3 | 53 | nameargs = argc = ac; |
c9af8668 BJ |
54 | argv = av; |
55 | for (i = 0; i < argc; i++) { | |
37c640e2 SL |
56 | if (argv[i][0] == '-' && |
57 | argv[i][1] >= '0' && argv[i][1] <= '9') { | |
b50e7db3 DW |
58 | maxrec = atoi(argv[i]+1); |
59 | nameargs--; | |
60 | continue; | |
61 | } | |
c9af8668 BJ |
62 | if (strlen(argv[i])>2) |
63 | continue; | |
64 | if (!strcmp(argv[i], "~")) | |
65 | continue; | |
ac7e4ccf SL |
66 | if (!strcmp(argv[i], "ftp")) |
67 | continue; | |
c9af8668 BJ |
68 | if (getpwnam(argv[i])) |
69 | continue; | |
70 | argv[i] = strspl("tty", argv[i]); | |
71 | } | |
72 | wtmp = open("/usr/adm/wtmp", 0); | |
73 | if (wtmp < 0) { | |
74 | perror("/usr/adm/wtmp"); | |
75 | exit(1); | |
76 | } | |
77 | fstat(wtmp, &stb); | |
78 | bl = (stb.st_size + sizeof (buf)-1) / sizeof (buf); | |
79 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) { | |
80 | signal(SIGINT, onintr); | |
81 | signal(SIGQUIT, onintr); | |
82 | } | |
83 | for (bl--; bl >= 0; bl--) { | |
84 | lseek(wtmp, bl * sizeof (buf), 0); | |
85 | bp = &buf[read(wtmp, buf, sizeof (buf)) / sizeof(buf[0]) - 1]; | |
86 | for ( ; bp >= buf; bp--) { | |
87 | print = want(bp); | |
88 | if (print) { | |
89 | ct = ctime(&bp->ut_time); | |
37c640e2 | 90 | printf("%-*.*s %-*.*s %-*.*s %10.10s %5.5s", |
c9af8668 | 91 | NMAX, NMAX, bp->ut_name, |
37c640e2 SL |
92 | LMAX, LMAX, bp->ut_line, |
93 | HMAX, HMAX, bp->ut_host, | |
94 | ct, 11+ct); | |
c9af8668 BJ |
95 | } |
96 | for (i = 0; i < MAXTTYS; i++) { | |
97 | if (ttnames[i][0] == 0) { | |
98 | strncpy(ttnames[i], bp->ut_line, | |
99 | sizeof(bp->ut_line)); | |
cf779ba2 | 100 | otime = logouts[i]; |
c9af8668 BJ |
101 | logouts[i] = bp->ut_time; |
102 | break; | |
103 | } | |
104 | if (lineq(ttnames[i], bp->ut_line)) { | |
105 | otime = logouts[i]; | |
106 | logouts[i] = bp->ut_time; | |
107 | break; | |
108 | } | |
109 | } | |
110 | if (print) { | |
111 | if (otime == 0) | |
112 | printf(" still logged in\n"); | |
113 | else { | |
114 | long delta; | |
115 | if (otime < 0) { | |
116 | otime = -otime; | |
fe6cb666 | 117 | printf("- %s", crmsg); |
c9af8668 BJ |
118 | } else |
119 | printf("- %5.5s", | |
120 | ctime(&otime)+11); | |
121 | delta = otime - bp->ut_time; | |
122 | if (delta < SECDAY) | |
123 | printf(" (%5.5s)\n", | |
124 | asctime(gmtime(&delta))+11); | |
125 | else | |
126 | printf(" (%ld+%5.5s)\n", | |
127 | delta / SECDAY, | |
128 | asctime(gmtime(&delta))+11); | |
129 | } | |
130 | fflush(stdout); | |
b50e7db3 DW |
131 | if (++outrec >= maxrec) |
132 | exit(0); | |
c9af8668 | 133 | } |
fe6cb666 | 134 | if (lineq(bp->ut_line, "~")) { |
cf779ba2 | 135 | for (i = 0; i < MAXTTYS; i++) |
c9af8668 | 136 | logouts[i] = -bp->ut_time; |
fe6cb666 BJ |
137 | if (nameq(bp->ut_name, "shutdown")) |
138 | crmsg = "down "; | |
139 | else | |
140 | crmsg = "crash"; | |
141 | } | |
c9af8668 BJ |
142 | } |
143 | } | |
144 | ct = ctime(&buf[0].ut_time); | |
145 | printf("\nwtmp begins %10.10s %5.5s \n", ct, ct + 11); | |
146 | exit(0); | |
147 | } | |
148 | ||
149 | onintr(signo) | |
150 | int signo; | |
151 | { | |
152 | char *ct; | |
153 | ||
154 | if (signo == SIGQUIT) | |
155 | signal(SIGQUIT, onintr); | |
156 | ct = ctime(&buf[0].ut_time); | |
157 | printf("\ninterrupted %10.10s %5.5s \n", ct, ct + 11); | |
158 | if (signo == SIGINT) | |
159 | exit(1); | |
160 | } | |
161 | ||
162 | want(bp) | |
163 | struct utmp *bp; | |
164 | { | |
165 | register char **av; | |
166 | register int ac; | |
167 | ||
fe6cb666 | 168 | if (bp->ut_line[0] == '~' && bp->ut_name[0] == '\0') |
c9af8668 | 169 | strcpy(bp->ut_name, "reboot"); /* bandaid */ |
ac7e4ccf SL |
170 | if (strncmp(bp->ut_line, "ftp", 3) == 0) |
171 | bp->ut_line[3] = '\0'; | |
c9af8668 BJ |
172 | if (bp->ut_name[0] == 0) |
173 | return (0); | |
b50e7db3 | 174 | if (nameargs == 0) |
c9af8668 BJ |
175 | return (1); |
176 | av = argv; | |
b50e7db3 DW |
177 | for (ac = 0; ac < argc; ac++, av++) { |
178 | if (av[0][0] == '-') | |
179 | continue; | |
c9af8668 BJ |
180 | if (nameq(*av, bp->ut_name) || lineq(*av, bp->ut_line)) |
181 | return (1); | |
c9af8668 BJ |
182 | } |
183 | return (0); | |
184 | } | |
185 | ||
186 | char * | |
187 | strspl(left, right) | |
188 | char *left, *right; | |
189 | { | |
190 | char *res = (char *)malloc(strlen(left)+strlen(right)+1); | |
191 | ||
192 | strcpy(res, left); | |
193 | strcat(res, right); | |
194 | return (res); | |
195 | } |