-/* vi: set sw=4 ts=4: */
-/*
- * fpathconf for uClibc
- *
- * Copyright (C) 2001 by Lineo, inc. Written by
- * Erik Andersen * <andersen@lineo.com>, <andersee@debian.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Library General Public License as published by
- * the Free Software Foundation; either version 2 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 Library General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
+/* fpathconf -- adjusted for busybox
+ Copyright (C) 1991,95,96,98,99,2000,2001 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 <unistd.h>
+#include <limits.h>
+#include <sys/statfs.h>
+#include <errno.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <limits.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/statfs.h>
+//#include <sys/statvfs.h>
+
+//#include "linux_fsinfo.h"
-long fpathconf(int filedes, int name)
-{
+
+/* The Linux kernel headers mention this as a kind of generic value. */
+#define LINUX_LINK_MAX 127
+
+
+/* Get file-specific information about descriptor FD. */
+long int fpathconf(int fd, int name)
+{
+ if (fd < 0)
+ {
+ __set_errno (EBADF);
return -1;
+ }
+
+ if (name == _PC_LINK_MAX)
+ {
+ /* Cut some corners */
+#if 0
+ struct statfs fsbuf;
+
+ /* Determine the filesystem type. */
+ if (fstatfs (fd, &fsbuf) < 0)
+ {
+ if (errno == ENOSYS)
+ /* not possible, return the default value. */
+ return LINUX_LINK_MAX;
+
+ /* Some error occured. */
+ return -1;
+ }
+
+ switch (fsbuf.f_type)
+ {
+ case EXT2_SUPER_MAGIC:
+ return EXT2_LINK_MAX;
+
+ case MINIX_SUPER_MAGIC:
+ case MINIX_SUPER_MAGIC2:
+ return MINIX_LINK_MAX;
+
+ case MINIX2_SUPER_MAGIC:
+ case MINIX2_SUPER_MAGIC2:
+ return MINIX2_LINK_MAX;
+
+ case XENIX_SUPER_MAGIC:
+ return XENIX_LINK_MAX;
+
+ case SYSV4_SUPER_MAGIC:
+ case SYSV2_SUPER_MAGIC:
+ return SYSV_LINK_MAX;
+
+ case COH_SUPER_MAGIC:
+ return COH_LINK_MAX;
+
+ case UFS_MAGIC:
+ case UFS_CIGAM:
+ return UFS_LINK_MAX;
+
+ case REISERFS_SUPER_MAGIC:
+ return REISERFS_LINK_MAX;
+
+ default:
+ return LINUX_LINK_MAX;
+ }
+#else
+ return LINUX_LINK_MAX;
+#endif
+ }
+
+ switch (name)
+ {
+ default:
+ __set_errno (EINVAL);
+ return -1;
+
+ case _PC_MAX_CANON:
+#ifdef MAX_CANON
+ return MAX_CANON;
+#else
+ return -1;
+#endif
+
+ case _PC_MAX_INPUT:
+#ifdef MAX_INPUT
+ return MAX_INPUT;
+#else
+ return -1;
+#endif
+
+ case _PC_NAME_MAX:
+#ifdef NAME_MAX
+ {
+ struct statfs buf;
+ int save_errno = errno;
+
+ if (fstatfs (fd, &buf) < 0)
+ {
+ if (errno == ENOSYS)
+ {
+ errno = save_errno;
+ return NAME_MAX;
+ }
+ return -1;
+ }
+ else
+ {
+#ifdef _STATFS_F_NAMELEN
+ return buf.f_namelen;
+#else
+# ifdef _STATFS_F_NAME_MAX
+ return buf.f_name_max;
+# else
+ return NAME_MAX;
+# endif
+#endif
+ }
+ }
+#else
+ return -1;
+#endif
+
+ case _PC_PATH_MAX:
+#ifdef PATH_MAX
+ return PATH_MAX;
+#else
+ return -1;
+#endif
+
+ case _PC_PIPE_BUF:
+#ifdef PIPE_BUF
+ return PIPE_BUF;
+#else
+ return -1;
+#endif
+
+ case _PC_CHOWN_RESTRICTED:
+#ifdef _POSIX_CHOWN_RESTRICTED
+ return _POSIX_CHOWN_RESTRICTED;
+#else
+ return -1;
+#endif
+
+ case _PC_NO_TRUNC:
+#ifdef _POSIX_NO_TRUNC
+ return _POSIX_NO_TRUNC;
+#else
+ return -1;
+#endif
+
+ case _PC_VDISABLE:
+#ifdef _POSIX_VDISABLE
+ return _POSIX_VDISABLE;
+#else
+ return -1;
+#endif
+
+ case _PC_SYNC_IO:
+#ifdef _POSIX_SYNC_IO
+ return _POSIX_SYNC_IO;
+#else
+ return -1;
+#endif
+
+ case _PC_ASYNC_IO:
+#if defined _POSIX_ASYNC_IO && defined __UCLIBC_HAVE_LFS__
+ {
+ /* AIO is only allowed on regular files and block devices. */
+ struct stat st;
+
+ if (fstat (fd, &st) < 0 || (! S_ISREG (st.st_mode) && ! S_ISBLK (st.st_mode)))
+ return -1;
+ else
+ return 1;
+ }
+#else
+ return -1;
+#endif
+
+ case _PC_PRIO_IO:
+#ifdef _POSIX_PRIO_IO
+ return _POSIX_PRIO_IO;
+#else
+ return -1;
+#endif
+
+ case _PC_SOCK_MAXBUF:
+#ifdef SOCK_MAXBUF
+ return SOCK_MAXBUF;
+#else
+ return -1;
+#endif
+
+ case _PC_FILESIZEBITS:
+#ifdef FILESIZEBITS
+ return FILESIZEBITS;
+#else
+ /* We let platforms with larger file sizes overwrite this value. */
+ return 32;
+#endif
+
+ /* Be lazy -- skip these */
+ case _PC_REC_INCR_XFER_SIZE:
+ case _PC_REC_MAX_XFER_SIZE:
+ case _PC_REC_MIN_XFER_SIZE:
+ case _PC_REC_XFER_ALIGN:
+ case _PC_ALLOC_SIZE_MIN:
+ case _PC_SYMLINK_MAX:
+ return -1;
+ }
+
}
--- /dev/null
+/* pathconf -- adjusted for busybox
+ Copyright (C) 1991,95,96,98,99,2000,2001 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 <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <limits.h>
+#include <fcntl.h>
+
+
+/* Get file-specific information about descriptor FD. */
+long int pathconf(const char *path, int name)
+{
+ int fd;
+
+ if (path[0] == '\0')
+ {
+ __set_errno (ENOENT);
+ return -1;
+ }
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ __set_errno (ENOENT);
+ return -1;
+ }
+ return (fpathconf(fd, name));
+}
+
OSDN Git Service
