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Annotation of 43BSDTahoe/man/man2/truncate.2, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1983 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)truncate.2  6.6 (Berkeley) 3/29/86
        !             6: .\"
        !             7: .TH TRUNCATE 2 "March 29, 1986"
        !             8: .UC 5
        !             9: .SH NAME
        !            10: truncate \- truncate a file to a specified length
        !            11: .SH SYNOPSIS
        !            12: .nf
        !            13: .ft B
        !            14: truncate(path, length)
        !            15: char *path;
        !            16: off_t length;
        !            17: .PP
        !            18: .ft B
        !            19: ftruncate(fd, length)
        !            20: int fd;
        !            21: off_t length;
        !            22: .fi
        !            23: .SH DESCRIPTION
        !            24: .I Truncate
        !            25: causes the file named by
        !            26: .I path
        !            27: or referenced by
        !            28: .I fd
        !            29: to be truncated to at most
        !            30: .I length
        !            31: bytes in size.  If the file previously
        !            32: was larger than this size, the extra data
        !            33: is lost.
        !            34: With
        !            35: .IR ftruncate ,
        !            36: the file must be open for writing.
        !            37: .SH "RETURN VALUES
        !            38: A value of 0 is returned if the call succeeds.  If the call
        !            39: fails a \-1 is returned, and the global variable \fIerrno\fP
        !            40: specifies the error.
        !            41: .SH "ERRORS
        !            42: .I Truncate
        !            43: succeeds unless:
        !            44: .TP 15
        !            45: [ENOTDIR]
        !            46: A component of the path prefix is not a directory.
        !            47: .TP 15
        !            48: [EINVAL]
        !            49: The pathname contains a character with the high-order bit set.
        !            50: .TP 15
        !            51: [ENAMETOOLONG]
        !            52: A component of a pathname exceeded 255 characters,
        !            53: or an entire path name exceeded 1023 characters.
        !            54: .TP 15
        !            55: [ENOENT]
        !            56: The named file does not exist.
        !            57: .TP 15
        !            58: [EACCES]
        !            59: Search permission is denied for a component of the path prefix.
        !            60: .TP 15
        !            61: [EACCES]
        !            62: The named file is not writable by the user.
        !            63: .TP 15
        !            64: [ELOOP]
        !            65: Too many symbolic links were encountered in translating the pathname.
        !            66: .TP 15
        !            67: [EISDIR]
        !            68: The named file is a directory.
        !            69: .TP 15
        !            70: [EROFS]
        !            71: The named file resides on a read-only file system.
        !            72: .TP 15
        !            73: [ETXTBSY]
        !            74: The file is a pure procedure (shared text) file that is being executed.
        !            75: .TP 15
        !            76: [EIO]
        !            77: An I/O error occurred updating the inode.
        !            78: .TP 15
        !            79: [EFAULT]
        !            80: .I Path
        !            81: points outside the process's allocated address space.
        !            82: .PP
        !            83: .I Ftruncate
        !            84: succeeds unless:
        !            85: .TP 15
        !            86: [EBADF]
        !            87: The
        !            88: .I fd
        !            89: is not a valid descriptor.
        !            90: .TP 15
        !            91: [EINVAL]
        !            92: The
        !            93: .I fd
        !            94: references a socket, not a file.
        !            95: .TP 15
        !            96: [EINVAL]
        !            97: The
        !            98: .I fd
        !            99: is not open for writing.
        !           100: .SH "SEE ALSO"
        !           101: open(2)
        !           102: .SH BUGS
        !           103: These calls should be generalized to allow ranges
        !           104: of bytes in a file to be discarded.

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