CHDIR(2) Linux Programmer's Manual CHDIR(2)
NAME
 chdir, fchdir - change working directory
SYNOPSIS
 #include <unistd.h>
 int chdir(const char *path);
 int fchdir(int fd);
 Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
 fchdir():
 _XOPEN_SOURCE >= 500
 || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L
 || /* Glibc up to and including 2.19: */ _BSD_SOURCE
DESCRIPTION
 chdir() changes the current working directory of the calling process to
 the directory specified in path.
 fchdir() is identical to chdir(); the only difference is that the di-
 rectory is given as an open file descriptor.
RETURN VALUE
 On success, zero is returned. On error, -1 is returned, and errno is
 set appropriately.
ERRORS
 Depending on the filesystem, other errors can be returned. The more
 general errors for chdir() are listed below:
 EACCES Search permission is denied for one of the components of path.
 (See also path_resolution(7).)
 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 directory specified in path 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.
 ENOTDIR
 fd does not refer to a directory.
CONFORMING TO
 POSIX.1-2001, POSIX.1-2008, SVr4, 4.4BSD.
NOTES
 The current working directory is the starting point for interpreting
 relative pathnames (those not starting with '/').
 A child process created via fork(2) inherits its parent's current work-
 ing directory. The current working directory is left unchanged by ex-
 ecve(2).
SEE ALSO
 chroot(2), getcwd(3), path_resolution(7)
COLOPHON
 This page is part of release 5.05 of the Linux man-pages project. A
 description of the project, information about reporting bugs, and the
 latest version of this page, can be found at
 https://www.kernel.org/doc/man-pages/.
Linux 2019年08月02日 CHDIR(2)