chdir, fchdir - 改變工作目錄

內容簡介

#include

int chdir(const char *path);
int fchdir(int fd);

描述

chdir() changes the current working directory to that specified in path. fchdir() is identical to chdir(); the only difference is that the directory is given as an open file descriptor.

返回值

On success, zero is returned. On error, -1 is returned, and errno is set appropriately.

錯誤

Depending on the file system, other errors can be returned. The more general errors for chdir() are listed below:

Error Code

描述

EACCES

Search permission is denied for one of the directories in the path prefix of path. (See also path_resolution(2).)

EFAULT

path points outside your accessible address space.

EIO

An I/O error occurred.

ELOOP

Too many symbolic links were encountered in resolving path.

ENAMETOOLONG

path is too long.

ENOENT

The file does not exist.

ENOMEM

Insufficient kernel memory was available.

ENOTDIR

A component of path is not a directory.

The general errors for fchdir() are listed below:

EACCES

Search permission was denied on the directory open on fd.

EBADF

fd is not a valid file descriptor.

注意

A child process created via fork(2) inherits its parent’s current working directory. The current working directory is left unchanged by execve(2).

The prototype for fchdir() is only available if _BSD_SOURCE is defined, or_XOPEN_SOURCE is defined with the value 500.

遵循於

SVr4, 4.4BSD, POSIX.1-2001.

另請參閱

• chroot (2)

• path_resolution (2)