Commit | Line | Data |
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40bafa33 JA |
1 | #include <sys/types.h> |
2 | #include <sys/stat.h> | |
036a1599 | 3 | #include <sys/sysmacros.h> |
40bafa33 JA |
4 | #include <dirent.h> |
5 | #include <string.h> | |
6 | #include <stdio.h> | |
7 | #include <unistd.h> | |
8 | ||
10c37df1 | 9 | #include "linux-dev-lookup.h" |
40bafa33 JA |
10 | |
11 | int blktrace_lookup_device(const char *redirect, char *path, unsigned int maj, | |
12 | unsigned int min) | |
13 | { | |
14 | struct dirent *dir; | |
15 | struct stat st; | |
16 | int found = 0; | |
17 | DIR *D; | |
18 | ||
d9d60dbf LS |
19 | /* |
20 | * If replay_redirect is set then always return this device | |
21 | * upon lookup which overrides the device lookup based on | |
22 | * major minor in the actual blktrace | |
23 | */ | |
24 | if (redirect) { | |
25 | strcpy(path, redirect); | |
26 | return 1; | |
27 | } | |
28 | ||
40bafa33 JA |
29 | D = opendir(path); |
30 | if (!D) | |
31 | return 0; | |
32 | ||
33 | while ((dir = readdir(D)) != NULL) { | |
1c3fa6c9 | 34 | char full_path[257]; |
40bafa33 JA |
35 | |
36 | if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, "..")) | |
37 | continue; | |
38 | ||
22497370 | 39 | sprintf(full_path, "%s/%s", path, dir->d_name); |
40bafa33 JA |
40 | if (lstat(full_path, &st) == -1) { |
41 | perror("lstat"); | |
42 | break; | |
43 | } | |
44 | ||
45 | if (S_ISDIR(st.st_mode)) { | |
46 | found = blktrace_lookup_device(redirect, full_path, | |
47 | maj, min); | |
48 | if (found) { | |
49 | strcpy(path, full_path); | |
50 | break; | |
51 | } | |
52 | } | |
53 | ||
54 | if (!S_ISBLK(st.st_mode)) | |
55 | continue; | |
56 | ||
40bafa33 JA |
57 | if (maj == major(st.st_rdev) && min == minor(st.st_rdev)) { |
58 | strcpy(path, full_path); | |
59 | found = 1; | |
60 | break; | |
61 | } | |
62 | } | |
63 | ||
64 | closedir(D); | |
65 | return found; | |
66 | } |