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#include <sys/types.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <dirent.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "linux-dev-lookup.h"
int blktrace_lookup_device(const char *redirect, char *path, unsigned int maj,
unsigned int min)
{
struct dirent *dir;
struct stat st;
int found = 0;
DIR *D;
D = opendir(path);
if (!D)
return 0;
while ((dir = readdir(D)) != NULL) {
char full_path[257];
if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
continue;
sprintf(full_path, "%s/%s", path, dir->d_name);
if (lstat(full_path, &st) == -1) {
perror("lstat");
break;
}
if (S_ISDIR(st.st_mode)) {
found = blktrace_lookup_device(redirect, full_path,
maj, min);
if (found) {
strcpy(path, full_path);
break;
}
}
if (!S_ISBLK(st.st_mode))
continue;
/*
* If replay_redirect is set then always return this device
* upon lookup which overrides the device lookup based on
* major minor in the actual blktrace
*/
if (redirect) {
strcpy(path, redirect);
found = 1;
break;
}
if (maj == major(st.st_rdev) && min == minor(st.st_rdev)) {
strcpy(path, full_path);
found = 1;
break;
}
}
closedir(D);
return found;
}
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