.\" @(#)chdir.3f 1.3 86/01/02 SMI; from UCB 4.2
.TH CHDIR 3F "98/09/16"
.SH NAME
chdir \- change default directory
.SH SYNOPSIS
.B integer*4 function chdir (dirname)
.br
.B character*(*) dirname
.SH DESCRIPTION
Change the default directory for creating and 
locating files to
.I dirname.
Zero is returned if successful; an error code otherwise.
.\"
.IX chdir "" \fLchdir\fP
.IX change "default directory"
.IX default "directory change"
.IX directory "default change"
.\"
.SH FILES
.\"
.B libF77.a
.SH "SEE ALSO"
.BR chdir (2), 
.BR cd (1), 
.BR perror (3F)
.SH RESTRICTIONS
Path names cannot be longer than 
.B MAXPATHLEN 
as defined in 
.BR <sys/param.h> .
.PP
Use of this function may cause
.B inquire
by unit to fail.
.LP
Certain FORTRAN file operations reopen files by name.  Using 
.B chdir
while doing I/O may cause the runtime system to lose track of files
created with relative path names, including those files that are 
created by 
.B open
statements without file names.