Files
LinuxDev2020/07_DebuggingTracing/preloader.c

16 lines
462 B
C

#define _GNU_SOURCE
#include <dlfcn.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
static int (*real_unlinkat)(int dirfd, const char* pathname, int flags) = NULL;
int unlinkat(int dirfd, const char* pathname, int flags) {
printf("unlinkat: %s\n", pathname);
real_unlinkat = dlsym(RTLD_NEXT, "unlinkat");
if (strstr(pathname, "FIX") != NULL)
return EPERM;
return real_unlinkat(dirfd, pathname, flags);
}