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
|
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdlib.h>
#include <string.h>
/* Return true if file NAME is a directory. */
static int
isdir (char *name)
{
struct stat st;
if (stat (name, &st))
{
perror (name);
return 0;
}
return S_ISDIR (st.st_mode);
}
static char *ignored_names[] = { ".", "..", NULL };
/* Return true if NAME should not be recursed into */
int
ignorent (char *name)
{
char **p;
for (p = ignored_names; *p; p++)
if (strcmp (name, *p) == 0)
return 1;
return 0;
}
int max_level = -1;
/* Print contents of the directory PREFIX/NAME.
Prefix each output line with LEVEL spaces. */
void
printdir (int level, char *name)
{
DIR *dir;
struct dirent *ent;
char cwd[512];
if (!getcwd(cwd, sizeof cwd))
{
perror ("cannot save cwd\n");
_exit (1);
}
chdir (name);
dir = opendir (".");
if (!dir)
{
perror (name);
_exit (1);
}
while ((ent = readdir (dir)))
{
printf ("%*.*s%s", level, level, "", ent->d_name);
if (ignorent (ent->d_name))
printf ("\n");
else if (isdir (ent->d_name))
{
printf ("/");
if (level + 1 == max_level)
putchar ('\n');
else
{
printf (" contains:\n");
printdir (level + 1, ent->d_name);
}
}
else
printf ("\n");
}
closedir (dir);
chdir (cwd);
}
int
main (int argc, char **argv)
{
if (argc < 2)
{
fprintf (stderr, "usage: d [-MAX] DIR [DIR...]\n");
return 1;
}
if (argv[1][0] == '-')
{
if (!(argv[1][1] == '-' && argv[1][2] == 0))
max_level = atoi (&argv[1][1]);
--argc;
++argv;
}
while (--argc)
printdir (0, *++argv);
return 1;
}
|