Functions

Hooked functions

This document list the tested functions in the program. If a function is not listed, it means that it is not tested yet. You can help us by adding it to the code.

How to add a new functions

1. Create a new file library/srcs/hook/functions/<header_where_the_function_is_declared>.c

2. Include the hook header and the header where the function is declared

   #include "../hook.h"
   #include <header_where_the_function_is_declared.h>

3. Use the macro DEFINE_HOOK_FUNCTION to define the hook function like this:

   DEFINE_HOOK_FUNCTION(<return_type>, <function_name>, <error_no_to_set>, <error_return_value>, <arg1_type>, <arg1_name>, <arg2_type>, <arg2_name>, ...)

   For example, if you want to hook the read function, you can do this:

   DEFINE_HOOK_FUNCTION(ssize_t, read, EIO, -1, int, fd, void *, buf, size_t, count)

   if you want to hook a function that returns a pointer, you have to make a typedef for the return type and use it in the macro.

   For example, if you want to hook the strdup function, you can do this:

   typedef char *char_ptr_t;
   DEFINE_HOOK_FUNCTION(char_ptr_t, strdup, ENOMEM, NULL, const char *, s)

4. Add the file to the Makefile

If you want to add a function that take a variable number of arguments, look hot it's done for open in library/srcs/hook/functions/fcntl.c.

Tested functions

allocs

• malloc
• calloc
• realloc

unistd.h

• access
• euidaccess
• execveat
• faccessat
• lseek
• lseek64
• close
• read
• write
• pread
• pwrite
• pread64
• pwrite64
• pipe
• pipe2
• usleep
• pause
• chown
• fchown
• lchown
• fchownat
• chdir
• fchdir
• getcwd
• get_current_dir_name
• dup
• dup2
• dup3
• execve
• confstr
• getpid
• getppid
• getpgrp
• getpgid
• setpgid
• setsid
• getuid
• geteuid
• getgid
• getegid
• setuid
• setgid
• seteuid
• getresuid
• getresgid
• setresuid
• setresgid
• fork
• vfork
• ttyname
• ttyname_r
• isatty
• ttyslot
• link
• linkat
• symlink
• symlinkat
• readlink
• readlinkat
• unlink
• unlinkat
• rmdir
• tcgetpgrp
• tcsetpgrp
• getlogin
• getlogin_r
• setlogin
• gethostname
• sethostname
• sethostid
• getdomainname
• setdomainname
• vhangup
• revoke
• profil
• acct
• getusershell
• deamon
• chroot
• getpass
• fsync
• syncfs
• truncate
• truncate64
• ftruncate
• ftruncate64
• brk
• sbrk

stdlib.h

• initstate
• setstate
• random_r
• srandom_r
• initstate_r
• setstate_r
• valloc
• on_exit
• at_quick_exit
• on_quick_exit
• getenv
• putenv
• setenv
• unsetenv
• mktemp
• mkstemp
• mkstemps
• mkostemp
• mkostemps
• system
• realpath
• posix_openpt
• grantpt
• unlockpt
• ptsname
• ptsname_r
• getpt

stdio.h

• remove
• rename
• renameat
• renameat2
• fclose
• tmpfile
• tmpfile64
• tmpnam
• tmpnam_r
• tempnam
• fflush
• fflush_unlocked
• fcloseall
• fopen
• freopen
• fopen64
• freopen64
• fdopen
• fopencookie
• fmemopen
• open_memstream
• open_wmemstream
• setvbuf
• vfprintf
• vprintf
• vsprintf
• vsnprintf
• vasprintf
• vdprintf
• vfscanf
• vscanf
• vsscanf
• fgetc
• getc
• getchar
• fgetc_unlocked
• getc_unlocked
• getchar_unlocked
• fputc
• putc
• putchar
• fputc_unlocked
• putc_unlocked
• putchar_unlocked
• getw
• putw
• fgets
• gets
• fgets_unlocked
• getdelim
• getline
• fputs
• puts
• ungetc
• fread
• fwrite
• fputs_unlocked
• fread_unlocked
• fwrite_unlocked
• fseek
• ftell
• fseeko
• ftello
• fgetpos
• fsetpos
• fseeko64
• ftello64
• fgetpos64
• fsetpos64
• feof
• ferror
• fileno
• fileno_unlocked
• pclose
• popen
• ctermid
• cuserid
• obstack_vprintf
• ftrylockfile

fcntl.h

• fcntl
• open
• openat
• creat
• lockf
• posix_fadvise
• posix_fallocate

stat.h

• stat
• fstat
• stat64
• fstat64
• lstat
• lstat64
• fstatat
• fstatat64
• chmod
• fchmod
• lchmod
• fchmodat
• umask
• mkdir
• mkdirat
• mknod
• mknodat
• mkfifo
• mkfifoat
• utimensat
• futimens

mman.h

• mmap
• mmap64
• munmap
• mprotect
• msync
• madvise
• posix_madvise
• mlock
• munlock
• mlockall
• munlockall
• mincore
• shm_open
• shm_unlink

wait.h

• wait
• waitpid
• waitid
• wait3
• wait4

string.h

• strdup
• strndup

signal.h

• sysv_signal
• signal
• bsd_signal
• kill
• killpg
• raise
• ssignal

socket.h

• socket
• socketpair
• bind
• getsockname
• connect
• getpeername
• send
• recv
• sendto
• recvfrom
• sendmsg
• recvmsg
• getsockopt
• setsockopt
• listen
• accept
• accept4
• shutdown
• sockatmark
• isfdtype

semaphore.h

• sem_open
• sem_init
• sem_destroy
• sem_close
• sem_unlink
• sem_wait
• sem_trywait
• sem_post
• sem_getvalue

poll.h

• poll
• ppoll

select.h

• select
• pselect