Category : UNIX Files
Archive : UNDEL10.ZIP
Filename : ISTTY.C
Output of file : ISTTY.C contained in archive : UNDEL10.ZIP
/* All Rights Reserved */
#ident "@(#)istty.c 1.1 - 90/08/13"
#include "ansi.h" /* ansi compatibility macros */
/* ansi headers */
#include
/* system headers */
#ifndef SYS_TYPES_H
#include
#define SYS_TYPES_H
#endif
#ifndef SYS_STAT_H
#include
#define SYS_STAT_H
#endif
/* local headers */
#include "syscalls.h"
/*man---------------------------------------------------------------------------
NAME
istty, isftty - test for tty device
SYNOPSIS
int istty(path)
const char *path;
int isftty(fd)
int fd;
DESCRIPTION
Path points to a path name naming a file. The istty function
tests the file type of that file. If it is a character special
file, a non-zero (true) value is returned. If it is not, a zero
(false) is returned. isftty operates in the same manner as
istty, but takes an open file descriptor fd.
DIAGNOSTICS
istty and isftty return a -1 on failure, with errno set to
indicate the error.
------------------------------------------------------------------------------*/
int istty(path)
const char *path;
{
struct stat st;
if (stat(path, &st) == -1) {
return -1;
}
errno = 0;
return st.st_mode & S_IFCHR ? 1 : 0;
}
int isftty(fd)
int fd;
{
struct stat st;
if (fstat(fd, &st) == -1) {
return -1;
}
errno = 0;
return st.st_mode & S_IFCHR ? 1 : 0;
}
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