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56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
/*
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* llseek.c -- stub calling the llseek system call
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*
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* Copyright (C) 1994, 1995, 1996, 1997 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the
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* GNU Lesser General Public License.
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* %End-Header%
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*/
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#if HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#if HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "ext2fs/ext2_io.h"
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#ifdef CONFIG_LFS
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# define my_llseek lseek64
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#else
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# define my_llseek lseek
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#endif
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ext2_loff_t ext2fs_llseek (int fd, ext2_loff_t offset, int origin)
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{
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ext2_loff_t result;
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static int do_compat = 0;
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if ((sizeof(off_t) >= sizeof(ext2_loff_t)) ||
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(offset < ((ext2_loff_t) 1 << ((sizeof(off_t)*8) -1))))
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return lseek(fd, (off_t) offset, origin);
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if (do_compat) {
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errno = EINVAL;
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return -1;
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}
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result = my_llseek (fd, offset, origin);
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if (result == -1 && errno == ENOSYS) {
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/*
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* Just in case this code runs on top of an old kernel
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* which does not support the llseek system call
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*/
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do_compat++;
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errno = EINVAL;
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}
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return result;
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}
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