1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
#include <ctype.h>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
/*
* Compare a string to a mask
* Mask characters:
* @ - uppercase letter
* # - lowercase letter
* & - hex digit
* # - digit
* * - swallow remaining characters
* <x> - exact match for any other character
*/
static int
checkmask(const char *data, const char *mask)
{
int i, ch, d;
for (i=0; mask[i] != '\0' && mask[i] != '*'; i++)
{
ch = mask[i];
d = data[i];
if (ch == '@')
{
if (!isupper(d)) return 0;
} else if (ch == '$')
{
if (!islower(d)) return 0;
} else if (ch == '#')
{
if (!isdigit(d)) return 0;
} else if (ch == '&')
{
if (!isxdigit(d)) return 0;
} else if (ch != d) return 0;
}
if (mask[i] == '*') return 1;
else return (data[i] == '\0');
}
/*
* Converts 8 hex digits to a time integer
*/
static int
hex2sec(const char *x)
{
int i, ch;
unsigned int j;
for (i=0, j=0; i < 8; i++)
{
ch = x[i];
j <<= 4;
if (isdigit(ch)) j |= ch - '0';
else if (isupper(ch)) j |= ch - ('A' - 10);
else j |= ch - ('a' - 10);
}
if (j == 0xffffffff) return -1; /* so that it works with 8-byte ints */
else return j;
}
int
main(int argc, char **argv)
{
int i, ver;
DIR *d;
struct dirent *e;
const char *s;
FILE *fp;
char path[FILENAME_MAX+1];
char line[1035];
time_t date, lmod, expire;
unsigned int len;
struct tm ts;
char sdate[30], slmod[30], sexpire[30];
const char time_format[]="%e %b %Y %R";
if (argc != 2)
{
printf("Usage: cls directory\n");
exit(0);
}
d = opendir(argv[1]);
if (d == NULL)
{
perror("opendir");
exit(1);
}
for (;;)
{
e = readdir(d);
if (e == NULL) break;
s = e->d_name;
if (s[0] == '.' || s[0] == '#') continue;
sprintf(path, "%s/%s", argv[1], s);
fp = fopen(path, "r");
if (fp == NULL)
{
perror("fopen");
continue;
}
if (fgets(line, 1034, fp) == NULL)
{
perror("fgets");
fclose(fp);
continue;
}
if (!checkmask(line, "&&&&&&&& &&&&&&&& &&&&&&&& &&&&&&&& &&&&&&&&\n"))
{
fprintf(stderr, "Bad cache file\n");
fclose(fp);
continue;
}
date = hex2sec(line);
lmod = hex2sec(line+9);
expire = hex2sec(line+18);
ver = hex2sec(line+27);
len = hex2sec(line+35);
if (fgets(line, 1034, fp) == NULL)
{
perror("fgets");
fclose(fp);
continue;
}
fclose(fp);
i = strlen(line);
if (strncmp(line, "X-URL: ", 7) != 0 || line[i-1] != '\n')
{
fprintf(stderr, "Bad cache file\n");
continue;
}
line[i-1] = '\0';
if (date != -1)
{
ts = *gmtime(&date);
strftime(sdate, 30, time_format, &ts);
} else
strcpy(sdate, "-");
if (lmod != -1)
{
ts = *gmtime(&lmod);
strftime(slmod, 30, time_format, &ts);
} else
strcpy(slmod, "-");
if (expire != -1)
{
ts = *gmtime(&expire);
strftime(sexpire, 30, time_format, &ts);
} else
strcpy(sexpire, "-");
printf("%s: %d; %s %s %s\n", line+7, ver, sdate, slmod, sexpire);
}
closedir(d);
return 0;
}
|
