forked from Imagelibrary/rtems
e565720aad
* libc/ttyname.c (ttyname_r): Removed duplicate call to closedir(). * libc/getpwent.c: Create a more robust /etc/passwd and /etc/group. * libc/base_fs.c: Change permissions of files and directories. Now uses octal constants.
78 lines
1.4 KiB
C
78 lines
1.4 KiB
C
/*
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* ttyname_r() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name
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*
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* $Id$
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <dirent.h>
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#include <termios.h>
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#include <unistd.h>
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#include <paths.h>
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#include <_syslist.h>
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#include <errno.h>
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#include <rtems/libio_.h>
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int ttyname_r(
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int fd,
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char *name,
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int namesize
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)
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{
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struct stat sb;
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struct termios tty;
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struct dirent *dirp;
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DIR *dp;
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struct stat dsb;
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char *rval;
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/* Must be a terminal. */
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if (tcgetattr (fd, &tty) < 0)
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set_errno_and_return_minus_one(EBADF);
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/* Must be a character device. */
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if (fstat (fd, &sb) || !S_ISCHR (sb.st_mode))
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set_errno_and_return_minus_one(EBADF);
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if ((dp = opendir (_PATH_DEV)) == NULL)
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set_errno_and_return_minus_one(EBADF);
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for (rval = NULL; (dirp = readdir (dp)) != NULL ;)
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{
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if (dirp->d_ino != sb.st_ino)
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continue;
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strcpy (name + sizeof (_PATH_DEV) - 1, dirp->d_name);
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if (stat (name, &dsb) || sb.st_dev != dsb.st_dev ||
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sb.st_ino != dsb.st_ino)
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continue;
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rval = name;
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break;
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}
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(void) closedir (dp);
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return 0;
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}
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static char buf[sizeof (_PATH_DEV) + MAXNAMLEN] = _PATH_DEV;
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/*
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* ttyname() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name
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*/
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char *ttyname(
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int fd
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)
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{
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if ( !ttyname_r( fd, buf, sizeof(buf) ) )
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return buf;
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return NULL;
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}
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