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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)):
45 Since glibc 2.10: _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
52 system call operates in exactly the same way as
54 except for the differences described in this manual page.
56 If the pathname given in
58 is relative, then it is interpreted relative to the directory
59 referred to by the file descriptor
61 (rather than relative to the current working directory of
62 the calling process, as is done by
64 for a relative pathname).
74 is interpreted relative to the current working
75 directory of the calling process (like
88 except that a relative pathname is interpreted relative
89 to the directory referred to by the file descriptor
96 if it is a symbolic link (like
98 Since Linux 2.6.18, the flag
104 to be dereferenced if it is a symbolic link.
105 Before kernel 2.6.18, the
107 argument was unused, and had to be specified as 0.
112 On error, \-1 is returned and
114 is set to indicate the error.
116 The same errors that occur for
120 The following additional errors can occur for
127 is not a valid file descriptor.
133 is a file descriptor referring to a file other than a directory;
140 was added to Linux in kernel 2.6.16.
146 for an explanation of the need for
151 .BR path_resolution (7),