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Linux 2.6 - man page for chdir (linux section 3)

CHDIR(P)						     POSIX Programmer's Manual							  CHDIR(P)

chdir - change working directory
#include <unistd.h> int chdir(const char *path);
The chdir() function shall cause the directory named by the pathname pointed to by the path argument to become the current working direc- tory; that is, the starting point for path searches for pathnames not beginning with '/' .
Upon successful completion, 0 shall be returned. Otherwise, -1 shall be returned, the current working directory shall remain unchanged, and errno shall be set to indicate the error.
The chdir() function shall fail if: EACCES Search permission is denied for any component of the pathname. ELOOP A loop exists in symbolic links encountered during resolution of the path argument. ENAMETOOLONG The length of the path argument exceeds {PATH_MAX} or a pathname component is longer than {NAME_MAX}. ENOENT A component of path does not name an existing directory or path is an empty string. ENOTDIR A component of the pathname is not a directory. The chdir() function may fail if: ELOOP More than {SYMLOOP_MAX} symbolic links were encountered during resolution of the path argument. ENAMETOOLONG As a result of encountering a symbolic link in resolution of the path argument, the length of the substituted pathname string exceeded {PATH_MAX}. The following sections are informative.
Changing the Current Working Directory The following example makes the value pointed to by directory, /tmp, the current working directory. #include <unistd.h> ... char *directory = "/tmp"; int ret; ret = chdir (directory);
The chdir() function only affects the working directory of the current process.
getcwd() , the Base Definitions volume of IEEE Std 1003.1-2001, <unistd.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at .
/The Open Group 2003 CHDIR(P)