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Annotation of researchv10dc/man/adm/man2/chdir.2, revision 1.1.1.1

1.1       root        1: .TH CHDIR 2
                      2: .CT 2 dirs
                      3: .SH NAME
                      4: chdir, chroot \(mi change working or root directory
                      5: .SH SYNOPSIS
                      6: .nf
                      7: .B int chdir(dirname)
                      8: .B char *dirname;
                      9: .PP
                     10: .B int chroot(dirname)
                     11: .B char *dirname;
                     12: .fi
                     13: .SH DESCRIPTION
                     14: .I Chdir
                     15: changes the working directory
                     16: of the invoking process to
                     17: .IR dirname ;
                     18: .I chroot
                     19: changes its root directory.
                     20: .PP
                     21: The root directory
                     22: is the starting point
                     23: when searching
                     24: for pathnames
                     25: beginning with
                     26: .LR / .
                     27: The working directory is the starting point
                     28: for pathnames that don't.
                     29: The root directory normally points to the system root.
                     30: .IR Login (8)
                     31: initially sets the working directory
                     32: as specified in the password file.
                     33: .PP
                     34: After
                     35: .IR chroot ,
                     36: it is impossible to name a file
                     37: outside the subtree rooted at the current root, provided
                     38: that the current directory is located within the subtree
                     39: and there are no links pointing outside the subtree
                     40: (except for the entry
                     41: .L \&..
                     42: in the root directory).
                     43: .PP
                     44: .I Chroot
                     45: may only be used by the super-user.
                     46: .SH SEE ALSO
                     47: .IR sh (1), 
                     48: .IR passwd (5)
                     49: .SH DIAGNOSTICS
                     50: .BR EACCES ,
                     51: .BR EFAULT ,
                     52: .BR EIO ,
                     53: .BR ELOOP ,
                     54: .BR ENOENT ,
                     55: .BR ENOTDIR ,
                     56: .BR EPERM
                     57: .RI ( chroot
                     58: only)
                     59: .SH BUGS
                     60: Using
                     61: .IR chroot ,
                     62: it is quite easy to fool set-userid programs about
                     63: the contents of the password file (for example).

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