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#include "dietfeatures.h"
#include <unistd.h>
#include <sys/stat.h>
#include <string.h>
#ifdef __linux__
#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,(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];
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:
if (n>63) {
n-=64;
*c='S';
++c;
}
num:
c[__ltostr(c,6,n,10,0)]=0;
break;
case 2:
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[7]='s';
duh:
buf[5]='p';
n+=(major(s.st_rdev)-136)<<8;
*c='/'; ++c;
goto num;
default:
return 0;
}
return buf;
}
return 0;
#endif
}
#endif
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