Commit | Line | Data |
---|---|---|
7a517deb TL |
1 | /* |
2 | * Print working (current) directory | |
3 | */ | |
4 | #include <sys/types.h> | |
5 | #include <sys/stat.h> | |
6 | #include <sys/dir.h> | |
7 | ||
8 | char dot[] "."; | |
9 | char dotdot[] ".."; | |
10 | char root[] "/"; | |
11 | char name[512]; | |
12 | int file; | |
13 | int off -1; | |
14 | struct stat x; | |
15 | struct direct y; | |
16 | ||
17 | main() | |
18 | { | |
19 | for (;;) { | |
20 | stat(dot, &x); | |
21 | if ((file = open(dotdot,0)) < 0) prname(); | |
22 | do { | |
23 | if (read(file, &y, sizeof(y)) < sizeof(y)) | |
24 | prname(); | |
25 | } while (y.d_ino != x.st_ino); | |
26 | close(file); | |
27 | if (y.d_ino == 2) | |
28 | ckroot(); | |
29 | cat(); | |
30 | chdir(dotdot); | |
31 | } | |
32 | } | |
33 | ||
34 | ckroot() | |
35 | { | |
36 | register i; | |
37 | ||
38 | if (stat(y.d_name,&x)<0 || chdir(root)<0 || (file=open(root,0))<0) | |
39 | prname(); | |
40 | i = x.st_dev; | |
41 | do { | |
42 | if (read(file,&y,sizeof(y)) < sizeof(y)) | |
43 | prname(); | |
44 | if (y.d_ino == 0) | |
45 | continue; | |
46 | if (stat(y.d_name,&x) < 0) | |
47 | prname(); | |
48 | } while (x.st_dev!=i || (x.st_mode&S_IFMT)!=S_IFDIR); | |
49 | if (strcmp(dot, y.d_name) || strcmp(dotdot, y.d_name)) | |
50 | cat(); | |
51 | write(1, root, 1); | |
52 | prname(); | |
53 | } | |
54 | ||
55 | prname() | |
56 | { | |
57 | if (off<0) | |
58 | off = 0; | |
59 | name[off] = '\n'; | |
60 | write(1, name, off+1); | |
61 | exit(0); | |
62 | } | |
63 | ||
64 | cat() | |
65 | { | |
66 | register i, j; | |
67 | ||
68 | i = -1; | |
69 | while (y.d_name[++i] != 0); | |
70 | if ((off+i+2) > 511) | |
71 | prname(); | |
72 | for(j=off+1; j>=0; --j) | |
73 | name[j+i+1] = name[j]; | |
74 | off=i+off+1; | |
75 | name[i] = root[0]; | |
76 | for(--i; i>=0; --i) | |
77 | name[i] = y.d_name[i]; | |
78 | } |