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
|
#include <stdio.h>
#include <string.h>
#include <unistd.h>
/* TODO make a recursive flag */
int rm(char *fn, int frc, int ask, int expAsk);
int
rm(char *fn, int frc, int ask, int prompt)
{
FILE *f;
int sz;
char yn;
/* get length of fn and check if it exists */
if ((f = fopen(fn, "r"))) {
fseek(f, 0L, SEEK_END);
sz = ftell(f);
} else {
fprintf(stderr, "fn '%s' doesn't exist!\n", fn);
return 1;
}
/* confirm deletion(s) when ask is on, and size is over 0 */
if (prompt && !frc || (ask && sz > 0)) {
printf("Do you want to delete %s? ", fn);
yn = getchar();
if (yn == 'y')
remove(fn);
} else
remove(fn);
return 0;
}
int
main(int argc, char *argv[])
{
int ask = 1; /* confirm deletion */
int prompt = 0; /* explicitly confirm deletion */
int frc = 0; /* force deletion */
int c;
while ((c = getopt(argc, argv, "efh")) != -1) {
switch (c) {
case 'i': prompt = 1; break;
case 'f': frc = 1; ask = 0; break;
case 'h': goto usage; break;
default: printf("run %s -h for help\n", argv[0]); return 1; break;
}
}
/* for each argument */
for (int i = 1; i < argc; i++) {
while (strncmp(argv[i], "-", 1) == 0) /* ignore args that start with - */
i++;
rm(argv[i], frc, ask, prompt);
}
return 0;
usage:
printf("Usage: %s -option(s) file(s)\n", argv[0]);
printf("\n\t-i prompt user for deletion of every file\n\t-f force deletion, does not ask for confirmation\n\t-h shows this help message\n");
}
|