chdir, fchdir - 改变工作目录
int 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.
Depending on the file system, other errors can be returned. The more general errors for chdir() are listed below:
|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.