Verified Commit 83cc0e40 authored by Tommaso Tocci's avatar Tommaso Tocci
Browse files

Intercept dirfd

parent 5b3b7cf9

ifs/include/preload/passthrough.hpp

+1 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ extern void* libc_dup; 
extern void* libc_dup2;

extern void* libc_dup3;



extern void* libc_dirfd;

extern void* libc_opendir;

extern void* libc_fdopendir;

extern void* libc_readdir;

ifs/src/preload/intcp_functions.cpp

+15 −0
Original line number Diff line number Diff line
@@ -1123,6 +1123,21 @@ inline DIR* fd_to_dirp(const int fd){ 
    return reinterpret_cast<DIR*>(fd);

}



int dirfd(DIR *dirp) {

    init_passthrough_if_needed();

    if(CTX->initialized()) {

        if(dirp == nullptr){

            errno = EINVAL;

            return -1;

        }

        auto fd = dirp_to_fd(dirp);

        if(CTX->file_map()->exist(fd)) {

            return fd;

        }

    }

    return LIBC_FUNC(dirfd, dirp);

}



DIR* opendir(const char* path){

    init_passthrough_if_needed();

    if(!CTX->initialized()) {

ifs/src/preload/passthrough.cpp

+2 −0
Original line number Diff line number Diff line
@@ -87,6 +87,7 @@ void* libc_dup; 
void* libc_dup2;

void* libc_dup3;



void* libc_dirfd;

void* libc_opendir;

void* libc_fdopendir;

void* libc_readdir;
@@ -183,6 +184,7 @@ void init_passthrough_() { 
    libc_dup2 = dlsym(libc, "dup2");

    libc_dup3 = dlsym(libc, "dup3");



    libc_dirfd = dlsym(libc, "dirfd");

    libc_opendir = dlsym(libc, "opendir");

    libc_fdopendir = dlsym(libc, "fdopendir");

    libc_readdir = dlsym(libc, "readdir");