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26 .TH UNLINKAT 2 2012-05-04 "Linux" "Linux Programmer's Manual"
28 unlinkat \- remove a directory entry relative to a directory file descriptor
31 .B #include <fcntl.h> /* Definition of AT_* constants */
32 .B #include <unistd.h>
34 .BI "int unlinkat(int " dirfd ", const char *" pathname ", int " flags );
38 Feature Test Macro Requirements for glibc (see
39 .BR feature_test_macros (7)):
48 _XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L
58 system call operates in exactly the same way as either
62 (depending on whether or not
67 except for the differences described in this manual page.
69 If the pathname given in
71 is relative, then it is interpreted relative to the directory
72 referred to by the file descriptor
74 (rather than relative to the current working directory of
75 the calling process, as is done by
79 for a relative pathname).
81 If the pathname given in
89 is interpreted relative to the current working
90 directory of the calling process (like
95 If the pathname given in
102 is a bit mask that can either be specified as 0, or by ORing
103 together flag values that control the operation of
105 Currently only one such flags is defined:
110 performs the equivalent of
116 flag is specified, then
117 performs the equivalent of
125 On error, \-1 is returned and
127 is set to indicate the error.
129 The same errors that occur for
135 The following additional errors can occur for
140 is not a valid file descriptor.
143 An invalid flag value was specified in
150 is a file descriptor referring to a file other than a directory.
153 was added to Linux in kernel 2.6.16;
154 library support was added to glibc in version 2.4.
157 A similar system call exists on Solaris.
161 for an explanation of the need for
167 .BR path_resolution (7)