1 /* random-del-create.c (GPL)*/
2 /* Hironobu SUZUKI <hironobu@h2np.net> */
3
4 #include <stdio.h>
5 #include <sys/stat.h>
6 #include <sys/types.h>
7 #include <fcntl.h>
8 #include <unistd.h>
9 #include <time.h>
10 #include <stdlib.h>
11 #define FAIL 0
12 #define SUCCESS 1
13
14 int openlog[2] = { 0, 0 };
15
16 #define MAXNUM 0x100000
17
18 #define MAXERROR 1024
19
20 extern int box_muler(int, int);
21 extern void create_or_delete(char *);
22
23 int delete_file(char *filename);
24 int create_file(char *filename);
25
26 int cfilecount = 0;
27 int dfilecount = 0;
28 int errorcount = 0;
29
main(int ac,char ** av)30 int main(int ac, char **av)
31 {
32 int r;
33 char fname[1024];
34 time_t t;
35 int i;
36 int m;
37
38 if (ac != 2) {
39 printf("%s hex-style-filename \n", av[0]);
40 printf("ex) %s 00022300\n", av[0]);
41 exit(1);
42 }
43 sscanf(av[1], "%x", &m);
44 if (m < 1 || m > MAXNUM) {
45 printf("out of size %d\n", m);
46 exit(1);
47 }
48
49 time(&t);
50 srandom((unsigned int)getpid() ^
51 (((unsigned int)t << 16) | (unsigned int)t >> 16));
52
53 /* 00/00/00/00 */
54 for (i = 0; i < m; i++) {
55 r = random() % m;
56 sprintf(fname, "00/%2.2x/%2.2x/00%2.2x%2.2x%2.2x",
57 ((r >> 16) & 0xFF),
58 ((r >> 8) & 0xFF),
59 ((r >> 16) & 0xFF), ((r >> 8) & 0xFF), (r & 0xFF));
60 create_or_delete(fname);
61 }
62 fprintf(stderr, "Total create files: %d\n", cfilecount);
63 fprintf(stderr, "Total delete files: %d\n", dfilecount);
64 fprintf(stderr, "Total error : %d\n", errorcount);
65 exit(0);
66 }
67
68 #define MAXFSIZE (192*1024)
69 #define AVEFSIZE (MAXFSIZE/2)
70 #define POOLDISKSPACE (AVEFSIZE*128)
71
72 static int disk_space_pool = 0;
create_or_delete(char * fname)73 void create_or_delete(char *fname)
74 {
75 int r;
76
77 r = (random() & 1);
78 if (r && disk_space_pool > POOLDISKSPACE) {
79 /* create */
80 create_file(fname);
81 } else {
82 delete_file(fname);
83 }
84 if ((errorcount > dfilecount || errorcount > cfilecount)
85 && (errorcount > MAXERROR)) {
86 fprintf(stderr, "too much error -- stop\n");
87 fprintf(stderr, "Total create files: %d\n", cfilecount);
88 fprintf(stderr, "Total delete files: %d\n", dfilecount);
89 fprintf(stderr, "Total error : %d\n", errorcount);
90 exit(1);
91 }
92 }
93
create_file(char * filename)94 int create_file(char *filename)
95 {
96 int fd;
97 int randomsize;
98 char wbuf[MAXFSIZE];
99 if ((fd = creat(filename, S_IRWXU)) < 0) {
100 errorcount++;
101 return (-1);
102 }
103 if ((randomsize = box_muler(0, MAXFSIZE)) < 0) {
104 randomsize = MAXFSIZE;
105 }
106 if (write(fd, wbuf, randomsize) < 0) {
107 errorcount++;
108 close(fd);
109 return (-1);
110 }
111 cfilecount++;
112 disk_space_pool -= randomsize;
113 close(fd);
114
115 return 0;
116 }
117
118 #include <sys/stat.h>
119 #include <unistd.h>
120
delete_file(char * filename)121 int delete_file(char *filename)
122 {
123 struct stat buf;
124 int st;
125 st = stat(filename, &buf);
126 if (st < 0) {
127 errorcount++;
128 return (-1);
129 }
130 disk_space_pool += buf.st_size;
131 if (unlink(filename) < 0) {
132 errorcount++;
133 return (-1);
134 }
135 dfilecount++;
136
137 return 0;
138 }
139