| 1 | .\" Copyright (c) 1980 Regents of the University of California.
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| 2 | .\" All rights reserved. The Berkeley software License Agreement
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| 3 | .\" specifies the terms and conditions for redistribution.
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| 4 | .\"
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| 5 | .\" @(#)chown.2 6.6 (Berkeley) 5/22/86
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| 6 | .\"
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| 7 | .TH CHOWN 2 "May 22, 1986"
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| 8 | .UC 4
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| 9 | .SH NAME
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| 10 | chown \- change owner and group of a file
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| 11 | .SH SYNOPSIS
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| 12 | .nf
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| 13 | .ft B
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| 14 | int chown(const char *\fIpath\fP, int \fIowner\fP, int \fIgroup\fP)
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| 15 | .ig \" You never know
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| 16 | .PP
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| 17 | .ft B
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| 18 | int fchown(int \fIfd\fP, int \fIowner\fP, int \fIgroup\fP)
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| 19 | ..
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| 20 | .fi
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| 21 | .SH DESCRIPTION
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| 22 | The file
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| 23 | that is named by \fIpath\fP
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| 24 | .ig
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| 25 | or referenced by \fIfd\fP
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| 26 | ..
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| 27 | has its
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| 28 | .I owner
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| 29 | and
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| 30 | .I group
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| 31 | changed as specified.
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| 32 | Only the super-user
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| 33 | may change the owner of the file,
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| 34 | because if users were able to give files away,
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| 35 | they could defeat file-space accounting procedures.
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| 36 | The owner of the file may change the group
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| 37 | to a group of which he is a member.
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| 38 | .PP
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| 39 | On some systems,
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| 40 | .I chown
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| 41 | clears the set-user-id and set-group-id bits
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| 42 | on the file
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| 43 | to prevent accidental creation of
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| 44 | set-user-id and set-group-id programs.
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| 45 | .SH "RETURN VALUE
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| 46 | Zero is returned if the operation was successful;
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| 47 | \-1 is returned if an error occurs, with a more specific
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| 48 | error code being placed in the global variable \fBerrno\fP.
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| 49 | .SH "ERRORS
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| 50 | .B Chown
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| 51 | will fail and the file will be unchanged if:
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| 52 | .TP 15
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| 53 | [ENOTDIR]
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| 54 | A component of the path prefix is not a directory.
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| 55 | .TP 15
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| 56 | [ENAMETOOLONG]
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| 57 | The path name exceeds PATH_MAX characters.
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| 58 | .TP 15
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| 59 | [ENOENT]
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| 60 | The named file does not exist.
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| 61 | .TP 15
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| 62 | [EACCES]
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| 63 | Search permission is denied for a component of the path prefix.
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| 64 | .TP 15
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| 65 | [ELOOP]
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| 66 | Too many symbolic links were encountered in translating the pathname.
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| 67 | (Minix-vmd)
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| 68 | .TP 15
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| 69 | [EPERM]
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| 70 | The effective user ID is not the super-user.
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| 71 | .TP 15
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| 72 | [EROFS]
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| 73 | The named file resides on a read-only file system.
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| 74 | .TP 15
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| 75 | [EFAULT]
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| 76 | .I Path
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| 77 | points outside the process's allocated address space.
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| 78 | .TP 15
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| 79 | [EIO]
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| 80 | An I/O error occurred while reading from or writing to the file system.
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| 81 | .ig
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| 82 | .PP
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| 83 | .B Fchown
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| 84 | will fail if:
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| 85 | .TP 15
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| 86 | [EBADF]
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| 87 | .I Fd
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| 88 | does not refer to a valid descriptor.
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| 89 | .TP 15
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| 90 | [EPERM]
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| 91 | The effective user ID is not the super-user.
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| 92 | .TP 15
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| 93 | [EROFS]
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| 94 | The named file resides on a read-only file system.
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| 95 | .TP 15
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| 96 | [EIO]
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| 97 | An I/O error occurred while reading from or writing to the file system.
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| 98 | ..
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| 99 | .SH "SEE ALSO"
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| 100 | .BR chown (8),
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| 101 | .BR chgrp (1),
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| 102 | .BR chmod (2).
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