1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
#include "dietfeatures.h"
#include <unistd.h>
#include <sys/stat.h>
#ifdef __linux__
extern int __ltostr(char *s, int size, unsigned long i, int base, char UpCase);
char *ttyname(int fd) {
#ifdef SLASH_PROC_OK
char ibuf[20];
static char obuf[20];
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;
return obuf;
#else
static char buf[20]="/dev/tty";
struct stat s;
char *c=buf+8;
int n;
if (fstat(fd,&s)) return 0;
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';
++c;
}
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;
case 136:
case 137:
case 138:
case 139:
buf[5]='p'; buf[7]='s';
n+=(major(s.st_rdev)-136)<<8;
*c='/'; ++c;
goto num;
default:
return 0;
}
return buf;
}
return 0;
#endif
}
#endif
|
