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1998-10-29  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/ttyname_r.c (ttyname_r): Try reading
	/prof/self/fd/FD first.
	* sysdeps/unix/sysv/linux/ttyname.c (ttyname): Likewise.

	* stdio-common/_itoa.h (_fitoa_word): New inline function.  Write
	formatted number starting at given position and return pointer to
	following byte.
	(_fitoa): Likewise, for long long.
This commit is contained in:
Ulrich Drepper
1998-10-29 15:17:25 +00:00
parent 05e951cd1a
commit c5e340c71b
14 changed files with 109 additions and 51 deletions
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22
sysdeps/unix/sysv/linux/ttyname.c
View File

@ -26,6 +26,8 @@
#include <string.h>
#include <stdlib.h>
#include <stdio-common/_itoa.h>
char *__ttyname = NULL;
static char * getttyname __P ((const char *dev, int fd, dev_t mydev,
@ -104,6 +106,9 @@ char *
ttyname (fd)
int fd;
{
static char *buf;
static size_t buflen = 0;
char procname[30];
struct stat st, st1;
int dostat = 0;
char *name;
@ -112,6 +117,23 @@ ttyname (fd)
if (!__isatty (fd))
return NULL;
/* We try using the /proc filesystem. */
*_fitoa_word (fd, __stpcpy (procname, "/proc/self/fd/"), 10, 0) = '\0';
if (buflen == 0)
{
buflen = 4095;
buf = (char *) malloc (buflen + 1);
if (buf == NULL)
{
buflen = 0;
return NULL;
}
}
if (__readlink (procname, buf, buflen) != -1)
return buf;
if (fstat (fd, &st) < 0)
return NULL;