CHOWN.2
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上传日期:2007-02-01
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操作系统开发
开发平台:
C/C++
- ." Copyright (c) 1980 Regents of the University of California.
- ." All rights reserved. The Berkeley software License Agreement
- ." specifies the terms and conditions for redistribution.
- ."
- ." @(#)chown.2 6.6 (Berkeley) 5/22/86
- ."
- .TH CHOWN 2 "May 22, 1986"
- .UC 4
- .SH NAME
- chown - change owner and group of a file
- .SH SYNOPSIS
- .nf
- .ft B
- int chown(const char *fIpathfP, int fIownerfP, int fIgroupfP)
- .ig " You never know
- .PP
- .ft B
- int fchown(int fIfdfP, int fIownerfP, int fIgroupfP)
- ..
- .fi
- .SH DESCRIPTION
- The file
- that is named by fIpathfP
- .ig
- or referenced by fIfdfP
- ..
- has its
- .I owner
- and
- .I group
- changed as specified.
- Only the super-user
- may change the owner of the file,
- because if users were able to give files away,
- they could defeat file-space accounting procedures.
- The owner of the file may change the group
- to a group of which he is a member.
- .PP
- On some systems,
- .I chown
- clears the set-user-id and set-group-id bits
- on the file
- to prevent accidental creation of
- set-user-id and set-group-id programs.
- .SH "RETURN VALUE
- Zero is returned if the operation was successful;
- -1 is returned if an error occurs, with a more specific
- error code being placed in the global variable fBerrnofP.
- .SH "ERRORS
- .B Chown
- will fail and the file will be unchanged if:
- .TP 15
- [ENOTDIR]
- A component of the path prefix is not a directory.
- .TP 15
- [ENAMETOOLONG]
- The path name exceeds PATH_MAX characters.
- .TP 15
- [ENOENT]
- The named file does not exist.
- .TP 15
- [EACCES]
- Search permission is denied for a component of the path prefix.
- .TP 15
- [ELOOP]
- Too many symbolic links were encountered in translating the pathname.
- (Minix-vmd)
- .TP 15
- [EPERM]
- The effective user ID is not the super-user.
- .TP 15
- [EROFS]
- The named file resides on a read-only file system.
- .TP 15
- [EFAULT]
- .I Path
- points outside the process's allocated address space.
- .TP 15
- [EIO]
- An I/O error occurred while reading from or writing to the file system.
- .ig
- .PP
- .B Fchown
- will fail if:
- .TP 15
- [EBADF]
- .I Fd
- does not refer to a valid descriptor.
- .TP 15
- [EPERM]
- The effective user ID is not the super-user.
- .TP 15
- [EROFS]
- The named file resides on a read-only file system.
- .TP 15
- [EIO]
- An I/O error occurred while reading from or writing to the file system.
- ..
- .SH "SEE ALSO"
- .BR chown (8),
- .BR chgrp (1),
- .BR chmod (2).