fix LD_LIBRARY_PATH and set user id

gogs.c

#include <sys/types.h>
#include <sys/types.h>
#include <pwd.h>
#include <limits.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
int main(int argc, char **argv_src)
{
    char exe[PATH_MAX+10];
    char *argv[256] = {0};

    readlink("/proc/self/exe",exe,PATH_MAX);
    strcat(exe, "_p");
    memcpy(argv, argv_src, argc*sizeof(char*));
    //char *argv[]={"./gogs","web",NULL};
  
    //char *envp[]={"USER=git","PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin","HOME=/home/git","LD_LIBRARY_PATH=/usr/local/glibc2_14/lib/",NULL};

    struct passwd *pwd = getpwnam("git");
    if(getuid()==0 && pwd){  
//        fprintf(stderr,"uid: %d, gid: %d", pwd->pw_uid, pwd->pw_gid);
        setgid(pwd->pw_gid);
        setuid(pwd->pw_uid);
    }
    putenv("USER=git");
    putenv("HOME=/home/git");
    putenv("LD_LIBRARY_PATH=/usr/local/glibc2_14/lib/");
    extern char **environ;
    execve(exe,argv,environ);

}