int Process::checkFileMaps(int pid, const char *mountPoint, char *openFilename, size_t max) {
FILE *file;
char buffer[PATH_MAX + 100];
sprintf(buffer, "/proc/%d/maps", pid);
file = fopen(buffer, "r");
if (!file)
return 0;
while (fgets(buffer, sizeof(buffer), file)) {
// skip to the path
const char* path = strchr(buffer, '/');
if (path && pathMatchesMountPoint(path, mountPoint)) {
if (openFilename) {
memset(openFilename, 0, max);
strncpy(openFilename, path, max-1);
}
fclose(file);
return 1;
}
}
fclose(file);
return 0;
}
int Process::checkSymLink(int pid, const char *mountPoint, const char *name) {
char path[PATH_MAX];
char link[PATH_MAX];
sprintf(path, "/proc/%d/%s", pid, name);
if (readSymLink(path, link, sizeof(link)) && pathMatchesMountPoint(link, mountPoint))
return 1;
return 0;
}
int checkfileDescriptorSymLinks(int pid, const char *mountPoint,
char *openFilename, size_t max)
{
// compute path to process's directory of open files
char path[PATH_MAX];
sprintf(path, "/proc/%d/fd", pid);
DIR *dir = opendir(path);
if (!dir)
return 0;
// remember length of the path
int parent_length = strlen(path);
// append a trailing '/'
path[parent_length++] = '/';
struct dirent *de;
while ((de = readdir(dir))) {
if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")
|| strlen(de->d_name) + parent_length + 1 >= PATH_MAX)
continue;
// append the file name, after truncating to parent directory
path[parent_length] = 0;
strcat(path, de->d_name);
char link[PATH_MAX];
if (readSymLink(path, link, sizeof(link))
&& pathMatchesMountPoint(link, mountPoint)) {
if (openFilename) {
memset(openFilename, 0, max);
strncpy(openFilename, link, max - 1);
}
closedir(dir);
return 1;
}
}
closedir(dir);
return 0;
}
