mirror of
https://git.libssh.org/projects/libssh.git
synced 2025-11-30 13:01:23 +03:00
c65f56aefa
git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@1 7dcaeef0-15fb-0310-b436-a5af3365683c
99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/* misc.c */
|
|
/* some misc routines than aren't really part of the ssh protocols but can be useful to the client */
|
|
|
|
/*
|
|
Copyright 2003 Aris Adamantiadis
|
|
|
|
This file is part of the SSH Library
|
|
|
|
The SSH Library is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or (at your
|
|
option) any later version.
|
|
|
|
The SSH Library is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with the SSH Library; see the file COPYING. If not, write to
|
|
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
|
|
MA 02111-1307, USA. */
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <pwd.h>
|
|
#include <sys/types.h>
|
|
#include <netdb.h>
|
|
#include "libssh/libssh.h"
|
|
|
|
/* if the program was executed suid root, don't trust the user ! */
|
|
static int is_trusted(){
|
|
if(geteuid()!=getuid())
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static char *get_homedir_from_uid(int uid){
|
|
struct passwd *pwd;
|
|
char *home;
|
|
while((pwd=getpwent())){
|
|
if(pwd->pw_uid == uid){
|
|
home=strdup(pwd->pw_dir);
|
|
endpwent();
|
|
return home;
|
|
}
|
|
}
|
|
endpwent();
|
|
return NULL;
|
|
}
|
|
|
|
static char *get_homedir_from_login(char *user){
|
|
struct passwd *pwd;
|
|
char *home;
|
|
while((pwd=getpwent())){
|
|
if(!strcmp(pwd->pw_name,user)){
|
|
home=strdup(pwd->pw_dir);
|
|
endpwent();
|
|
return home;
|
|
}
|
|
}
|
|
endpwent();
|
|
return NULL;
|
|
}
|
|
|
|
char *ssh_get_user_home_dir(){
|
|
char *home;
|
|
char *user;
|
|
int trusted=is_trusted();
|
|
if(trusted){
|
|
if((home=getenv("HOME")))
|
|
return strdup(home);
|
|
if((user=getenv("USER")))
|
|
return get_homedir_from_login(user);
|
|
}
|
|
return get_homedir_from_uid(getuid());
|
|
}
|
|
|
|
/* we have read access on file */
|
|
int ssh_file_readaccess_ok(char *file){
|
|
if(!access(file,R_OK))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
u64 ntohll(u64 a){
|
|
#ifdef WORDS_BIGENDIAN
|
|
return a;
|
|
#else
|
|
u32 low=a & 0xffffffff;
|
|
u32 high = a >> 32 ;
|
|
low=ntohl(low);
|
|
high=ntohl(high);
|
|
return (( ((u64)low) << 32) | ( high));
|
|
#endif
|
|
}
|