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26 .TH LINKAT 2 2009-12-13 "Linux" "Linux Programmer's Manual"
28 linkat \- create a file link relative to directory file descriptors
31 .B #include <fcntl.h> /* Definition of AT_* constants */
32 .B #include <unistd.h>
34 .BI "int linkat(int " olddirfd ", const char *" oldpath ,
35 .BI " int " newdirfd ", const char *" newpath ", int " flags );
39 Feature Test Macro Requirements for glibc (see
40 .BR feature_test_macros (7)):
49 _XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L
59 system call operates in exactly the same way as
61 except for the differences described in this manual page.
63 If the pathname given in
65 is relative, then it is interpreted relative to the directory
66 referred to by the file descriptor
68 (rather than relative to the current working directory of
69 the calling process, as is done by
71 for a relative pathname).
81 is interpreted relative to the current working
82 directory of the calling process (like
95 except that a relative pathname is interpreted relative
96 to the directory referred to by the file descriptor
103 if it is a symbolic link (like
105 Since Linux 2.6.18, the flag
111 to be dereferenced if it is a symbolic link.
112 Before kernel 2.6.18, the
114 argument was unused, and had to be specified as 0.
119 On error, \-1 is returned and
121 is set to indicate the error.
123 The same errors that occur for
127 The following additional errors can occur for
134 is not a valid file descriptor.
140 is a file descriptor referring to a file other than a directory;
147 was added to Linux in kernel 2.6.16.
153 for an explanation of the need for
158 .BR path_resolution (7),