Added man pages.

man/man2/chdir.2

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+.\" Copyright (c) 1980 Regents of the University of California.
+.\" All rights reserved.  The Berkeley software License Agreement
+.\" specifies the terms and conditions for redistribution.
+.\"
+.\"	@(#)chdir.2	6.3 (Berkeley) 8/26/85
+.\"
+.TH CHDIR 2 "August 26, 1985"
+.UC 4
+.SH NAME
+chdir \- change current working directory
+.SH SYNOPSIS
+.nf
+.ft B
+#include <unistd.h>
+
+int chdir(const char *\fIpath\fP)
+.ft R
+.fi
+.SH DESCRIPTION
+.I Path
+is the pathname of a directory.
+.B Chdir
+causes this directory
+to become the current working directory,
+the starting point for path names not beginning with ``/''.
+.PP
+In order for a directory to become the current directory,
+a process must have execute (search) access to the directory.
+.SH "RETURN VALUE
+Upon successful completion, a value of 0 is returned.
+Otherwise, a value of \-1 is returned and \fBerrno\fP is set to indicate
+the error.
+.SH ERRORS
+.B Chdir
+will fail and the current working directory will be unchanged if
+one or more of the following are true:
+.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 directory does not exist.
+.TP 15
+[ELOOP]
+Too many symbolic links were encountered in translating the pathname.
+(Minix-vmd)
+.TP 15
+[EACCES]
+Search permission is denied for any component of
+the path name.
+.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.
+.SH "SEE ALSO"
+.BR chroot (2).