Commit | Line | Data |
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40bafa33 JA |
1 | #include <sys/types.h> |
2 | #include <sys/stat.h> | |
3 | #include <dirent.h> | |
4 | #include <string.h> | |
5 | #include <stdio.h> | |
6 | #include <unistd.h> | |
7 | ||
8 | #include "../os/os.h" | |
a89ba4b1 | 9 | #include "oslib/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 | ||
19 | D = opendir(path); | |
20 | if (!D) | |
21 | return 0; | |
22 | ||
23 | while ((dir = readdir(D)) != NULL) { | |
24 | char full_path[256]; | |
25 | ||
26 | if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, "..")) | |
27 | continue; | |
28 | ||
22497370 | 29 | sprintf(full_path, "%s/%s", path, dir->d_name); |
40bafa33 JA |
30 | if (lstat(full_path, &st) == -1) { |
31 | perror("lstat"); | |
32 | break; | |
33 | } | |
34 | ||
35 | if (S_ISDIR(st.st_mode)) { | |
36 | found = blktrace_lookup_device(redirect, full_path, | |
37 | maj, min); | |
38 | if (found) { | |
39 | strcpy(path, full_path); | |
40 | break; | |
41 | } | |
42 | } | |
43 | ||
44 | if (!S_ISBLK(st.st_mode)) | |
45 | continue; | |
46 | ||
47 | /* | |
48 | * If replay_redirect is set then always return this device | |
49 | * upon lookup which overrides the device lookup based on | |
50 | * major minor in the actual blktrace | |
51 | */ | |
52 | if (redirect) { | |
53 | strcpy(path, redirect); | |
54 | found = 1; | |
55 | break; | |
56 | } | |
57 | ||
58 | if (maj == major(st.st_rdev) && min == minor(st.st_rdev)) { | |
59 | strcpy(path, full_path); | |
60 | found = 1; | |
61 | break; | |
62 | } | |
63 | } | |
64 | ||
65 | closedir(D); | |
66 | return found; | |
67 | } |