| [9] | 1 | .\" Copyright (c) 1983 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 | .\" @(#)chroot.2 6.3 (Berkeley) 8/26/85
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| 6 | .\"
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| 7 | .TH CHROOT 2 "August 26, 1985"
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| 8 | .UC 5
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| 9 | .SH NAME
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| 10 | chroot \- change root directory
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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 | #include <unistd.h>
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| 15 |
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| 16 | int chroot(const char *\fIdirname\fP)
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| 17 | .ft R
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| 18 | .fi
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| 19 | .SH DESCRIPTION
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| 20 | .I Dirname
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| 21 | is the address of the pathname of a directory, terminated by a null byte.
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| 22 | .B Chroot
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| 23 | causes this directory
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| 24 | to become the root directory,
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| 25 | the starting point for path names beginning with ``/''.
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| 26 | .PP
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| 27 | In order for a directory to become the root directory
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| 28 | a process must have execute (search) access to the directory.
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| 29 | .PP
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| 30 | This call is restricted to the super-user.
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| 31 | .SH "RETURN VALUE
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| 32 | Upon successful completion, a value of 0 is returned. Otherwise,
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| 33 | a value of \-1 is returned and \fBerrno\fP is set to indicate an error.
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| 34 | .SH ERRORS
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| 35 | .B Chroot
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| 36 | will fail and the root directory will be unchanged if
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| 37 | one or more of the following are true:
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| 38 | .TP 15
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| 39 | [ENOTDIR]
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| 40 | A component of the path name is not a directory.
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| 41 | .TP 15
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| 42 | [ENAMETOOLONG]
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| 43 | The path name exceeds PATH_MAX characters.
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| 44 | .TP 15
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| 45 | [ENOENT]
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| 46 | The named directory does not exist.
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| 47 | .TP 15
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| 48 | [EACCES]
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| 49 | Search permission is denied for any component of the path name.
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| 50 | .TP 15
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| 51 | [ELOOP]
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| 52 | Too many symbolic links were encountered in translating the pathname.
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| 53 | (Minix-vmd)
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| 54 | .TP 15
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| 55 | [EFAULT]
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| 56 | .I Path
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| 57 | points outside the process's allocated address space.
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| 58 | .TP 15
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| 59 | [EIO]
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| 60 | An I/O error occurred while reading from or writing to the file system.
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| 61 | .SH "SEE ALSO"
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| 62 | .BR chdir (2).
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