Commit | Line | Data |
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7cecd961 HK |
1 | /* |
2 | * sess - determines clock time used so far this session by this user | |
3 | * or for tty or user supplied as an argument | |
4 | * | |
5 | * Author: Howard Katseff | |
6 | * | |
7 | * Note that 'sess ~' gives time since system last started. | |
8 | */ | |
9 | ||
10 | struct {long l1;}; | |
11 | struct {char c1, c2, c3, c4;}; | |
12 | char buf[32]; | |
13 | ||
14 | main(argc, argv) | |
15 | char **argv; { | |
16 | int f, i; | |
17 | char t[2], *p; | |
18 | long lx; | |
19 | int intrp(); | |
20 | ||
21 | t[1] = 0; | |
22 | f = open("/usr/adm/wtmp", 0); | |
23 | if (f < 0) { | |
24 | printf("Can't open /usr/adm/wtmp\n"); | |
25 | exit(); | |
26 | } | |
27 | fstat(f, buf); | |
28 | ||
29 | lx.c2 = 0; | |
30 | lx.c1 = buf[9]; | |
31 | lx.c3 = buf[10] & 0360; | |
32 | lx.c4 = buf[11]; | |
33 | ||
34 | blseek(f, lx, 0); | |
35 | ||
36 | if (argc <= 1) { | |
37 | t[0] = ttyn(2); | |
38 | p = t; | |
39 | } | |
40 | else p = argv[1]; | |
41 | ||
42 | if ((signal(2,1) && 01) == 0) signal(2, &intrp); | |
43 | ||
44 | for (;;) { | |
45 | if (bread(f, buf+16, -16) < 16) exit(); | |
46 | lx =- 16; | |
47 | if (equal(p, buf)) { | |
48 | if (*(p+1) != '\0') { | |
49 | t[0] = buf[8]; | |
50 | p = t; | |
51 | blseek(f, lx+16, 0); | |
52 | while(bread(f, buf, 16) > 0) | |
53 | if (equal(p, buf)) goto l1; | |
54 | blseek(f, lx, 0); | |
55 | bread(f, buf, 16); | |
56 | l1:; } | |
57 | time(&lx); | |
58 | lx =+ 231231630 - (buf+10)->l1; | |
59 | printf("Elapsed time:"); | |
60 | if (lx < 231318030) | |
61 | printf(" %5.5s", 11+ctime(&lx)); | |
62 | else | |
63 | printf(" %ld + %5.5s",(lx-231231630)/86400, | |
64 | 11+ctime(&lx)); | |
65 | if (buf[0] == '\0' && *p != '~') | |
66 | printf(" since logout\n"); | |
67 | else putchar('\n'); | |
68 | exit(); | |
69 | } | |
70 | } | |
71 | } | |
72 | ||
73 | ||
74 | equal(c1, c2) | |
75 | char *c1, *c2; { | |
76 | int i; | |
77 | ||
78 | if (*(c1+1) == '\0') { | |
79 | if (*c1 == *(c2+8)) return(1); | |
80 | else return(0); | |
81 | } | |
82 | ||
83 | for (i=0; i<8; i++) { | |
84 | if (*c1 == '\0') return(*c2 == ' '); | |
85 | if (*c1++ != *c2++) return(0); | |
86 | } | |
87 | ||
88 | return(1); | |
89 | } | |
90 | ||
91 | intrp() { | |
92 | register char *q; | |
93 | ||
94 | signal(2,1); | |
95 | ||
96 | q = ctime(buf+10); | |
97 | printf("interrupted at %10.10s %5.5s \n", | |
98 | q, 11+q); | |
99 | ||
100 | exit(); | |
101 | } | |
102 | /* | |
103 | * NAME: bread(), brseek(), blseek() | |
104 | * | |
105 | * DESCRIPTION: | |
106 | * This is a buffered read package which simulates read(), seek() and | |
107 | * lseek(). | |
108 | * Bread may be called with a negative nbytes which causes it to | |
109 | * read backwards . In this case, buffer should point to the first | |
110 | * byte following the buffer. If only a partial read is possible | |
111 | * (due to beginning of file), only the last bytes of the buffer | |
112 | * will be filled. | |
113 | */ | |
114 | ||
115 | int i, j, k; | |
116 | int nl, nr; | |
117 | char *next; | |
118 | char b[512]; | |
119 | ||
120 | bread(file, buff, nbytes) | |
121 | char *buff; { | |
122 | register nb; | |
123 | ||
124 | if (nbytes > 0) { | |
125 | for (nb=nbytes; nb>0; nb--) { | |
126 | if (nr == 0) { | |
127 | nr = read(file, next=b, 512); | |
128 | nl = 0; | |
129 | if (nr < 0) return(-1); | |
130 | if (nr == 0) return(nbytes-nb); | |
131 | } | |
132 | *buff++ = *next++; | |
133 | nr--; | |
134 | nl++; | |
135 | } | |
136 | } | |
137 | else { | |
138 | nbytes = -nbytes; | |
139 | for (nb=nbytes; nb>0; nb--) { | |
140 | if (nl == 0) { | |
141 | seek(file, -(512 + nr), 1); | |
142 | nl = read(file, b, 512); | |
143 | if (nl < 0) { | |
144 | for (k=511; k>0; k--) { | |
145 | seek(file, 1, 1); | |
146 | nl = read(file, b, k); | |
147 | if (nl >= 0) break; | |
148 | } | |
149 | if (nl < 0) return(nbytes-nb); | |
150 | } | |
151 | if (nl == 0) return(nbytes-nb); | |
152 | next = b + nl; | |
153 | nr = 0; | |
154 | } | |
155 | *--buff = *--next; | |
156 | nr++; | |
157 | nl--; | |
158 | } | |
159 | } | |
160 | return(nbytes); | |
161 | } | |
162 | ||
163 | ||
164 | brseek(file, offset, flag) { | |
165 | nl = 0; | |
166 | nr = 0; | |
167 | return(seek(file,offset,flag)); | |
168 | } | |
169 | ||
170 | ||
171 | blseek(file, offset, flag) | |
172 | long offset; { | |
173 | nl = 0; | |
174 | nr = 0; | |
175 | return(lseek(file,offset,flag)); | |
176 | } |