diff options
Diffstat (limited to 'gnulib/lib/ptsname_r.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/ptsname_r.c | 85 |
2 files changed, 85 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/lib/ptsname_r.c b/gnulib/lib/ptsname_r.c new file mode 100644 index 0000000..e7f2d5b --- /dev/null +++ b/gnulib/lib/ptsname_r.c @@ -0,0 +1,85 @@ +/* Determine name of the slave side of a pseudo-terminal. + Copyright (C) 1998, 2002, 2010-2011 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include <config.h> + +#include <stdlib.h> + +#include <errno.h> +#include <string.h> +#include <sys/stat.h> +#include <unistd.h> + +#ifdef _LIBC +# include <paths.h> +#else +# ifndef _PATH_TTY +# define _PATH_TTY "/dev/tty" +# endif +# ifndef _PATH_DEV +# define _PATH_DEV "/dev/" +# endif + +# define __set_errno(e) errno = (e) +# define __isatty isatty +# define __stat stat +# define __ttyname_r ttyname_r +# define __ptsname_r ptsname_r + +#endif + + +/* Store at most BUFLEN characters of the pathname of the slave pseudo + terminal associated with the master FD is open on in BUF. + Return 0 on success, otherwise an error number. */ +int +__ptsname_r (int fd, char *buf, size_t buflen) +{ + int save_errno = errno; + int err; + struct stat st; + + if (buf == NULL) + { + __set_errno (EINVAL); + return EINVAL; + } + + if (!__isatty (fd)) + /* We rely on isatty to set errno properly (i.e. EBADF or ENOTTY). */ + return errno; + + if (buflen < strlen (_PATH_TTY) + 3) + { + __set_errno (ERANGE); + return ERANGE; + } + + err = __ttyname_r (fd, buf, buflen); + if (err != 0) + { + __set_errno (err); + return errno; + } + + buf[sizeof (_PATH_DEV) - 1] = 't'; + + if (__stat (buf, &st) < 0) + return errno; + + __set_errno (save_errno); + return 0; +} |