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
|
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <dirent.h>
#include <time.h>
#include <sys/file.h>
#include <sys/stat.h>
void
die(const char *fmtstr, ...)
{
va_list ap;
fprintf(stderr, "CLEANER: ");
va_start(ap, fmtstr);
vfprintf(stderr, fmtstr, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
int
creation_time(const char *path)
{
struct stat attrib;
stat(path, &attrib);
return attrib.st_ctim.tv_sec;
}
char*
aprintf(const char *fmtstr, ...)
{
va_list ap, cpy;
size_t nb;
char *str;
va_copy(cpy, ap);
va_start(cpy, fmtstr);
nb = vsnprintf(NULL, 0, fmtstr, cpy);
va_end(cpy);
if (nb <= 0) die("Invalid fmtstr!\n");
str = malloc(nb+1);
if (!str) die("Alloc of fmtstr failed\n");
va_start(ap, fmtstr);
nb = vsnprintf(str, nb+1, fmtstr, ap);
va_end(ap);
return str;
}
void
recdel(const char *path)
{
struct stat attrib;
struct dirent *de;
char *subpath;
DIR *d;
stat(path, &attrib);
if (S_ISDIR(attrib.st_mode)) {
d = opendir(path);
while ((de = readdir(d))) {
if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
continue;
subpath = aprintf("%s/%s", path, de->d_name);
recdel(subpath);
free(subpath);
}
closedir(d);
rmdir(path);
} else {
remove(path);
}
}
int
main(int argc, const char **argv)
{
char buf[256], *end, *path,
**paths, *oldpath, *newpath;
unsigned long reftime;
int i, pathc, pathcap, nread;
const char *dirpath;
FILE *f, *fn;
if (argc != 3) die("USAGE: cleaner DIR REFTIME\n");
dirpath = argv[1];
reftime = strtoul(argv[2], &end, 10);
if (end && *end) die("Invalid unix time reference\n");
oldpath = aprintf("%s/.index", dirpath);
if (!(f = fopen(oldpath, "r+")))
die("Missing index file: %s\n", oldpath);
flock(fileno(f), LOCK_EX);
newpath = aprintf("%s/.index.next", dirpath);
if (!(fn = fopen(newpath, "w+")))
die("Failed to create index file: %s\n", newpath);
pathc = 0;
pathcap = 1024;
paths = malloc(pathcap * sizeof(char*));
if (!paths) die("OOM - allocating initial path array\n");
while (fgets(buf, sizeof(buf), f)) {
if (*buf && buf[strlen(buf)-1] == '\n')
buf[strlen(buf)-1] = '\0';
path = aprintf("%s/%s", dirpath, buf);
if (creation_time(path) < reftime) {
paths[pathc] = strdup(path);
if (!paths[pathc++]) die("OOM - during path str alloc\n");
if (pathc == pathcap) {
pathcap *= 2;
paths = realloc(paths, pathcap * sizeof(char*));
if (!paths) die("OOM - too many paths to alloc\n");
}
} else {
fwrite(buf, 1, strlen(buf), fn);
putc('\n', fn);
}
free(path);
}
fseek(f, 0, SEEK_SET);
fseek(fn, 0, SEEK_SET);
while ((nread = fread(buf, 1, sizeof(buf), fn)) > 0)
fwrite(buf, 1, nread, f);
ftruncate(fileno(f), ftell(f));
nread = ftell(f);
flock(fileno(f), LOCK_UN);
fclose(f);
fclose(fn);
for (i = 0; i < pathc; i++) {
recdel(paths[i]);
printf("CLEANER: REMOVED %s\n", paths[i]);
}
}
|
