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CHDIR(2) System Calls Manual CHDIR(2)

chdir, fchdirchange current working directory

#include <unistd.h>

int
chdir(const char *path);

int
fchdir(int fd);

The path argument points to the pathname of a directory. The chdir() function causes the named directory to become the current working directory, that is, the starting point for path searches of pathnames not beginning with a slash (‘/’).

The fchdir() function causes the directory referenced by fd to become the current working directory, the starting point for path searches of pathnames not beginning with a slash (‘/’).

In order for a directory to become the current directory, a process must have execute (search) access to the directory.

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

chdir() will fail and the current working directory will be unchanged if one or more of the following are true:

[]
A component of the path prefix is not a directory.
[]
A component of a pathname exceeded {NAME_MAX} characters, or an entire path name exceeded {PATH_MAX} characters.
[]
The named directory does not exist.
[]
Too many symbolic links were encountered in translating the pathname.
[]
Search permission is denied for any component of the pathname.
[]
path points outside the process's allocated address space.
[]
An I/O error occurred while reading from the file system.

fchdir() will fail and the current working directory will be unchanged if one or more of the following are true:

[]
Search permission is denied for the directory referenced by the file descriptor.
[]
The file descriptor does not reference a directory.
[]
The argument fd is not a valid file descriptor.
[]
An I/O error occurred while reading from the file system.

chroot(2)

The chdir() and fchdir() functions are expected to conform to IEEE Std 1003.1-2008 (“POSIX.1”).

The chdir() system call first appeared in Version 1 AT&T UNIX, and fchdir() in 4.3BSD-Reno.

March 31, 2013 OpenBSD-5.5