chdir(2) - NetBSD Manual Pages

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CHDIR(2)                  NetBSD System Calls Manual                  CHDIR(2)


NAME
chdir, fchdir -- change current working directory
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h> int chdir(const char *path); int fchdir(int fd);
DESCRIPTION
The path argument points to the pathname of a directory. The chdir() function causes the named directory to become the current working direc- tory, 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 path- names 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.
RETURN VALUES
Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error.
ERRORS
chdir() will fail and the current working directory will be unchanged if one or more of the following are true: [ENOTDIR] A component of the path prefix is not a directory. [ENAMETOOLONG] A component of a pathname exceeded {NAME_MAX} charac- ters, or an entire path name exceeded {PATH_MAX} char- acters. [ENOENT] The named directory does not exist. [ELOOP] Too many symbolic links were encountered in translat- ing the pathname. [EACCES] Search permission is denied for any component of the path name. [EFAULT] path points outside the process's allocated address space. [EIO] An I/O error occurred while reading from or writing to the file system. fchdir() will fail and the current working directory will be unchanged if one or more of the following are true: [EACCES] Search permission is denied for the directory refer- enced by the file descriptor. [ENOTDIR] The file descriptor does not reference a directory. [EBADF] The argument fd is not a valid file descriptor. [EPERM] The argument fd references a directory which is not at or below the current process's root directory.
SEE ALSO
chroot(2)
STANDARDS
The chdir() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1'').
HISTORY
The fchdir() function call appeared in 4.2BSD. NetBSD 5.1 December 11, 1993 NetBSD 5.1
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