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Full Discussion: find . -type d -exec cd {} \;
Top Forums UNIX for Dummies Questions & Answers find . -type d -exec cd {} \; Post 90539 by Perderabo on Wednesday 23rd of November 2005 10:42:30 AM
Old 11-23-2005
Most versions of unix have an external program called cd because Posix, in its wisdom, requires this. An external cd program is terribly useless. In the find example posted by the OP, the cd program runs as a separate process, it does indeed attempt a chdir() system call into the specified directory. Then it exits, leaving the parent process' current directory unchanged. The exit indicated whether or not it succeeded.

Sometimes stuff like acl's can affect whether or not you can cd into a directory. To produce a list of those directories into which you cannot cd, you could do:

find . -type d ! -exec /usr/bin/cd {} \; -print 2>/dev/null

That is about the only use I can find for an external cd program.
 

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LEARN ABOUT HPUX

chdir

chdir(2)							System Calls Manual							  chdir(2)

NAME

       chdir, fchdir - change working directory

SYNOPSIS

DESCRIPTION

       and  cause  a  directory pointed to by path or fildes to become the current working directory, the starting point for path searches of path
       names not beginning with path points to the path name of a directory.  fildes is an open file descriptor of a directory.

       For a directory to become the current working directory, a process must have execute (search) access to the directory.

RETURN VALUE

       Upon successful completion, a value of 0 is returned.  Otherwise, a value of -1 is returned and is set to indicate the error.

ERRORS

       fails and the current working directory remains unchanged if one or more of the following are true:

	      A component of the path name is not a directory.

	      The named directory does not exist.

	      Search permission is denied for any component of the path name.

	      path		    points outside the allocated address space of the process.	The reliable detection of this error is  implemen-
				    tation dependent.

	      path		    is null.

	      The length of the specified path name exceeds
				    bytes, or the length of a component of the path name exceeds bytes while is in effect.

	      Too many symbolic links were encountered in translating the path name.

       fails and the current working directory remains unchanged if one or more of the following are true:

	      Search permission is denied for
				    fildes.

	      fildes		    is not an open file descriptor.

	      The open file descriptor
				    fildes does not refer to a directory.

AUTHOR

       and were developed by AT&T Bell Laboratories and HP.

SEE ALSO

       cd(1), chroot(2), privileges(5).

STANDARDS CONFORMANCE

																	  chdir(2)
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