chdir, fchdir - 改變工作目錄
#includeint chdir(const char *path); int fchdir(int fd);
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.
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
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. |
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.
SVr4, 4.4BSD, POSIX.1-2001.