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-rw-r--r--libssh/misc.c98
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diff --git a/libssh/misc.c b/libssh/misc.c
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+/* 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
+}