1 files changed, 4 insertions, 2 deletions

diff --git a/noncore/settings/networksettings/ppp/modem.cpp b/noncore/settings/networksettings/ppp/modem.cpp
index 7b2e2a3..17ada9b 100644
--- a/noncore/settings/networksettings/ppp/modem.cpp
+++ b/noncore/settings/networksettings/ppp/modem.cpp
@@ -675,194 +675,196 @@ int Modem::openLockfile( QString lockfile, int flags)
     //   }
     if ((fd = open(lockfile, flags, mode)) == -1) {
         odebug << "error opening lockfile!" << oendl;
         lockfile = QString::null;
         fd = open(DEVNULL, O_RDONLY);
     } else
         fchown(fd, 0, 0);
     return fd;
 }
 
 
 
 void alarm_handler(int) {
   //  fprintf(stderr, "alarm_handler(): Received SIGALRM\n");
 
   // jump
   siglongjmp(jmp_buffer, 1);
 }
 
 
 const char* Modem::authFile(Auth method, int version) {
   switch(method|version) {
   case PAP|Original:
     return PAP_AUTH_FILE;
     break;
   case PAP|New:
     return PAP_AUTH_FILE".new";
     break;
   case PAP|Old:
     return PAP_AUTH_FILE".old";
     break;
   case CHAP|Original:
     return CHAP_AUTH_FILE;
     break;
   case CHAP|New:
     return CHAP_AUTH_FILE".new";
     break;
   case CHAP|Old:
     return CHAP_AUTH_FILE".old";
     break;
   default:
     return 0L;
   }
 }
 
 
 bool Modem::createAuthFile(Auth method, const char *username, const char *password) {
   const char *authfile, *oldName, *newName;
   char line[100];
   char regexp[2*MaxStrLen+30];
   regex_t preg;
 
   if(!(authfile = authFile(method)))
     return false;
 
   if(!(newName = authFile(method, New)))
     return false;
 
   // look for username, "username" or 'username'
   // if you modify this RE you have to adapt regexp's size above
   snprintf(regexp, sizeof(regexp), "^[ \t]*%s[ \t]\\|^[ \t]*[\"\']%s[\"\']",
           username,username);
   MY_ASSERT(regcomp(&preg, regexp, 0) == 0);
 
   // copy to new file pap- or chap-secrets
   int old_umask = umask(0077);
   FILE *fout = fopen(newName, "w");
   if(fout) {
     // copy old file
     FILE *fin = fopen(authfile, "r");
     if(fin) {
       while(fgets(line, sizeof(line), fin)) {
         if(regexec(&preg, line, 0, 0L, 0) == 0)
            continue;
         fputs(line, fout);
       }
       fclose(fin);
     }
 
     // append user/pass pair
     fprintf(fout, "\"%s\"\t*\t\"%s\"\n", username, password);
     fclose(fout);
   }
 
   // restore umask
   umask(old_umask);
 
   // free memory allocated by regcomp
   regfree(&preg);
 
   if(!(oldName = authFile(method, Old)))
     return false;
 
   // delete old file if any
   unlink(oldName);
 
-  rename(authfile, oldName);
-  rename(newName, authfile);
+  if (rename(authfile, oldName) == -1)
+    return false;
+  if (rename(newName, authfile) == -1)
+    return false;
 
   return true;
 }
 
 
 bool Modem::removeAuthFile(Auth method) {
   const char *authfile, *oldName;
 
   if(!(authfile = authFile(method)))
     return false;
   if(!(oldName = authFile(method, Old)))
     return false;
 
   if(access(oldName, F_OK) == 0) {
     unlink(authfile);
     return (rename(oldName, authfile) == 0);
   } else
     return false;
 }
 
 
 bool Modem::setSecret(int method, const char* name, const char* password)
 {
 
     Auth auth;
     if(method == AUTH_PAPCHAP)
         return setSecret(AUTH_PAP, name, password) &&
             setSecret(AUTH_CHAP, name, password);
 
     switch(method) {
     case AUTH_PAP:
         auth = Modem::PAP;
         break;
     case AUTH_CHAP:
         auth = Modem::CHAP;
         break;
     default:
         return false;
     }
 
     return createAuthFile(auth, name, password);
 
 }
 
 bool Modem::removeSecret(int method)
 {
    Auth auth;
 
     switch(method) {
     case AUTH_PAP:
         auth = Modem::PAP;
         break;
     case AUTH_CHAP:
         auth = Modem::CHAP;
         break;
     default:
         return false;
     }
     return removeAuthFile( auth );
 }
 
 int checkForInterface()
 {
 // I don't know if Linux needs more initialization to get the ioctl to
 // work, pppd seems to hint it does.  But BSD doesn't, and the following
 // code should compile.
 #if (defined(HAVE_NET_IF_PPP_H) || defined(HAVE_LINUX_IF_PPP_H)) && !defined(__svr4__)
     int s, ok;
     struct ifreq ifr;
     //    extern char *no_ppp_msg;
 
     if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
         return 1;               /* can't tell */
 
     strlcpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
     ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
     close(s);
 
     if (ok == -1) {
 // This is ifdef'd FreeBSD, because FreeBSD is the only BSD that supports
 // KLDs, the old LKM interface couldn't handle loading devices
 // dynamically, and thus can't load ppp support on the fly
 #ifdef __FreeBSD__
         // If we failed to load ppp support and don't have it already.
         if (kldload("if_ppp") == -1) {
             return -1;
         }
         return 0;
 #else
         return -1;
 #endif
     }
     return 0;
 #else
 // We attempt to use the SunOS/SysVr4 method and stat /dev/ppp
    struct stat buf;