1 files changed, 14 insertions, 7 deletions
diff --git a/mdk-stage1/dietlibc/lib/ttyname.c b/mdk-stage1/dietlibc/lib/ttyname.c
index a6b479088..2bbc7f2a9 100644
--- a/mdk-stage1/dietlibc/lib/ttyname.c
+++ b/mdk-stage1/dietlibc/lib/ttyname.c
@@ -1,30 +1,35 @@
 #include "dietfeatures.h"
 #include <unistd.h>
 #include <sys/stat.h>
+#include <string.h>
 
 #ifdef __linux__
 
-extern int __ltostr(char *s, int size, unsigned long i, int base, char UpCase);
+#include <stdlib.h>
 
 char *ttyname(int fd) {
 #ifdef SLASH_PROC_OK
   char ibuf[20];
   static char obuf[20];
+  int len;
+  if (!isatty(fd)) return 0;
   strcpy(ibuf,"/proc/self/fd/");
-  ibuf[__ltostr(ibuf+14,6,fd,10,0)+14]=0;
-  if (readlink(ibuf,obuf,sizeof(obuf)-1)<0) return 0;
+  ibuf[__ltostr(ibuf+14,6,(unsigned long)fd,10,0)+14]=0;
+  if ((len=readlink(ibuf,obuf,sizeof(obuf)-1))<0) return 0;
+  obuf[len]=0;
   return obuf;
 #else
-  static char buf[20]="/dev/tty";
+  static char buf[20];
   struct stat s;
   char *c=buf+8;
   int n;
+  if (!isatty(fd)) return 0;
   if (fstat(fd,&s)) return 0;
+  strcpy(buf,"/dev/tty");
   if (S_ISCHR(s.st_mode)) {
     n=minor(s.st_rdev);
     switch (major(s.st_rdev)) {
     case 4:
-      buf[5]='t'; buf[7]='y';
       if (n>63) {
 	n-=64;
 	*c='S';
@@ -34,16 +39,18 @@ num:
       c[__ltostr(c,6,n,10,0)]=0;
       break;
     case 2:
-      buf[5]='p'; buf[7]='y';
       buf[8]='p'-(n>>4);
       buf[9]=n%4+'0';
       if (buf[9]>'9') *c+='a'-'0';
       buf[10]=0;
+      goto duh;
     case 136:
     case 137:
     case 138:
     case 139:
-      buf[5]='p'; buf[7]='s';
+      buf[7]='s';
+duh:
+      buf[5]='p';
       n+=(major(s.st_rdev)-136)<<8;
       *c='/'; ++c;
       goto num;