c - Get address of system function manually? -

how obtain address gdb gives when "print system"?

supposedly, if start program , pause it, in /proc/$pid/maps , base address of library. need find offset of system() in libc.so.6 , add these 2 together. however, when try in practice, end address different 1 gdb gives.

what's best way obtain system() address?

please note i'm trying obtain address of program, not 1 compiled myself.

what's best way obtain system() address?

#include <stdio.h>    // printf() #include <stdlib.h>   // system() ...  ...    {    int rcode=0;    int (*system_ptr)(const char *command) = system;    ...    rcode=(*system_ptr)("echo \"hello\"");    ...    printf("address of system(): %p\n", system_ptr);    ...    } ...