diff options
Diffstat (limited to 'sysdeps/generic/sysd-stdio.c')
| -rw-r--r-- | sysdeps/generic/sysd-stdio.c | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/sysdeps/generic/sysd-stdio.c b/sysdeps/generic/sysd-stdio.c deleted file mode 100644 index 032ea60819..0000000000 --- a/sysdeps/generic/sysd-stdio.c +++ /dev/null @@ -1,191 +0,0 @@ -/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <errno.h> -#include <stddef.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> - -extern __io_read_fn __stdio_read; -extern __io_write_fn __stdio_write; -extern __io_seek_fn __stdio_seek; -extern __io_close_fn __stdio_close; -extern __io_fileno_fn __stdio_fileno; - -/* Read N bytes into BUF from COOKIE. */ -int -__stdio_read (void *cookie, char *buf, size_t n) -{ - const int fd = (int) cookie; -#if defined EINTR && defined EINTR_REPEAT - int save = errno; - int nread; - - try:; - __set_errno (0); - nread = __read (fd, buf, (int) n); - if (nread < 0) - { - if (errno == EINTR) - goto try; - return -1; - } - __set_errno (save); - return nread; - -#else /* No EINTR. */ - return __read (fd, buf, n); -#endif -} - - -/* Write N bytes from BUF to COOKIE. */ -int -__stdio_write (void *cookie, const char *buf, size_t n) -{ - const int fd = (int) cookie; - register size_t written = 0; - - while (n > 0) - { - int count = __write (fd, buf, (int) n); - if (count > 0) - { - buf += count; - written += count; - n -= count; - } - else if (count < 0 -#if defined EINTR && defined EINTR_REPEAT - && errno != EINTR -#endif - ) - /* Write error. */ - return -1; - } - - return (int) written; -} - - -/* Move COOKIE's file position *POS bytes, according to WHENCE. - The new file position is stored in *POS. - Returns zero if successful, nonzero if not. */ -int -__stdio_seek (void *cookie, fpos_t *pos, int whence) -{ - off_t new; - new = __lseek ((int) cookie, (off_t) *pos, whence); - if (new < 0) - return 1; - *pos = (fpos_t) new; - return 0; -} - - -/* Close COOKIE. */ -int -__stdio_close (void *cookie) -{ - return __close ((int) cookie); -} - -/* Return the POSIX.1 file descriptor associated with COOKIE, - or -1 for errors. If COOKIE does not relate to any POSIX.1 file - descriptor, this should return -1 with errno set to EOPNOTSUPP. */ -int -__stdio_fileno (void *cookie) -{ - return (int) cookie; -} - - -/* Open the given file with the mode given in the __io_mode argument. */ -int -__stdio_open (const char *filename, __io_mode m, void **cookieptr) -{ - int fd; - int mode; - - if (m.__read && m.__write) - mode = O_RDWR; - else - mode = m.__read ? O_RDONLY : O_WRONLY; - - if (m.__append) - mode |= O_APPEND; - if (m.__exclusive) - mode |= O_EXCL; - if (m.__truncate) - mode |= O_TRUNC; - - if (m.__create) - fd = __open (filename, mode | O_CREAT, - S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH); - else - fd = __open (filename, mode); - - if (fd < 0) - return -1; - - *cookieptr = (void *) fd; - return 0; -} - - -/* Open FILENAME with the mode in M. Use the same magic cookie - already in *COOKIEPTR if possible, closing the old cookie with CLOSEFN. */ -int -__stdio_reopen (const char *filename, __io_mode m, void **cookieptr, - __io_close_fn closefn) -{ - void *newcookie; - - /* We leave the old descriptor open while we open the file. - That way ``freopen ("/dev/stdin", "r", stdin)'' works. */ - - if (__stdio_open (filename, m, &newcookie)) - { - if (errno == ENFILE || errno == EMFILE) - { - /* We are out of file descriptors. Try closing the old one and - retrying the open. */ - (void) (*closefn) (*cookieptr); - if (__stdio_open (filename, m, &newcookie)) - return -1; - } - else - return -1; - } - - if (newcookie != *cookieptr) - { - if (closefn != __stdio_close || - /* Try to move the descriptor to the desired one. */ - __dup2 ((int) newcookie, (int) *cookieptr) < 0) - /* Didn't work. Give the caller the new cookie. */ - *cookieptr = newcookie; - } - - return 0; -} |